Commit Graph

2411 Commits

Author SHA1 Message Date
Denys Vlasenko
ae04ce82cf base32/64: "truncated base64 input" -> "truncated input"
text	   data	    bss	    dec	    hex	filename
1021739	    559	   5052	1027350	  fad16	busybox_old
1021732	    559	   5052	1027343	  fad0f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-28 13:43:54 +01:00
Denys Vlasenko
885121e25d libbb: change decode_base32/64 API to return the end of _dst_, not _src_.
function                                             old     new   delta
decode_base64                                        173     178      +5
read_base64                                          222     220      -2
decode_base32                                        186     182      -4
handle_incoming_and_exit                            2263    2239     -24
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 5/-30)             Total: -25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-28 13:27:36 +01:00
Denys Vlasenko
fc6faac84e libbb: trim base32/64 tables
function                                             old     new   delta
bb_uuenc_tbl_base64                                   66      65      -1
bb_uuenc_tbl_base32                                   34      32      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-28 12:48:34 +01:00
Denys Vlasenko
f140b49f5f base32/64: code shrink
function                                             old     new   delta
decode_base64                                        178     173      -5
decode_base32                                        217     186     -31
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-36)             Total: -36 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-28 12:33:50 +01:00
Denys Vlasenko
7467e905e5 base32/64: code shrink
function                                             old     new   delta
decode_base64                                        180     178      -2
decode_base32                                        224     217      -7
read_base64                                          236     222     -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-23)             Total: -23 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-28 09:50:14 +01:00
Denys Vlasenko
2cd37d65e2 libbb: faster and smaller decode_base32()
function                                             old     new   delta
decode_base32                                        275     224     -51

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-27 21:25:34 +01:00
Denys Vlasenko
170b8628fa libbb: smaller and faster decode_base64()
function                                             old     new   delta
decode_base64                                        195     180     -15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-27 20:45:15 +01:00
Denys Vlasenko
20900489a1 base32: new applet
function                                             old     new   delta
baseNUM_main                                           -     568    +568
decode_base32                                          -     275    +275
bb_uuenc_tbl_base32                                    -      34     +34
read_base64                                          218     236     +18
applet_names                                        2732    2739      +7
applet_main                                         1580    1584      +4
packed_usage                                       33480   33478      -2
base64_main                                          208       -    -208
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 3/1 up/down: 906/-210)          Total: 696 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-26 09:04:16 +01:00
Jan Klötzke
12aa68d10f libbb: set netlink socket revbuf size before binding
As soon as the socket is bound it will receive messages. Make sure the
recieve buffer size is increased before the first message is received.

Signed-off-by: Jan Klötzke <jan@kloetzke.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-22 13:12:51 +01:00
Audun-Marius Gangstø
9bf4499dd7 lineedit: fix unicode characters in prompt
function                                             old     new   delta
parse_and_put_prompt                                 779     823     +44

Signed-off-by: Audun-Marius Gangstø <audun@gangsto.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-11-21 17:34:42 +01:00
Denys Vlasenko
112453acf2 od: unbreak it
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-25 23:44:22 +01:00
Denys Vlasenko
079487b487 hexdump: fix dup block comparison
function                                             old     new   delta
bb_dump_dump                                        1523    1520      -3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-20 19:29:32 +02:00
Denys Vlasenko
dac5b83142 xxd: fix printing of trailing spaces
function                                             old     new   delta
bb_dump_dump                                        1497    1523     +26
xxd_main                                             459     466      +7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 33/0)               Total: 33 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-20 18:57:02 +02:00
Denys Vlasenko
2496616b0a avoid using strok - eliminates use of hidden global variable
function                                             old     new   delta
udhcp_str2optset                                     616     650     +34
setpriv_main                                         950     975     +25
switch_root_main                                     688     706     +18
parse                                                958     970     +12
getopt_main                                          622     628      +6
parse_resolvconf                                     302     306      +4
mpstat_main                                         1139    1142      +3
static.p                                               4       -      -4
cdcmd                                                717     702     -15
strtok                                               148       -    -148
------------------------------------------------------------------------------
(add/remove: 0/3 grow/shrink: 7/1 up/down: 102/-167)          Total: -65 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-06 02:36:47 +02:00
Denys Vlasenko
689d0650ab libbb: shrink recursive_action() by reducing memory pressure
function                                             old     new   delta
recursive_action1                                      -     316    +316
file_action_grep                                     161     164      +3
add_to_prg_cache_if_socket                           202     205      +3
depmod_main                                          509     511      +2
writeFileToTarball                                   488     489      +1
parse_module                                         281     282      +1
fileAction                                           207     208      +1
act                                                  189     190      +1
add_to_dirlist                                        65      64      -1
writeTarFile                                         196     194      -2
uuidcache_init                                        47      45      -2
uuidcache_check_device                               109     107      -2
true_action                                            8       6      -2
run_parts_main                                       310     308      -2
netstat_main                                         534     532      -2
lsusb_main                                            29      27      -2
lspci_main                                            45      43      -2
initial_scan                                         138     136      -2
grep_main                                            845     843      -2
find_main                                            482     480      -2
config_file_action                                   437     435      -2
chmod_main                                           142     140      -2
dirAction                                             14      10      -4
diff_main                                           1544    1540      -4
chown_main                                           154     148      -6
skip_dir                                             136     129      -7
dir_act                                              191     184      -7
recursive_action                                     453      69    -384
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 7/20 up/down: 328/-439)        Total: -111 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01 21:52:16 +02:00
Denys Vlasenko
4a0eb0370c gcc-9.x warning fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01 03:07:22 +02:00
Denys Vlasenko
aaa0709e7b libbb: do not open-code __errno_location() call
Thanks dalias!

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01 01:44:26 +02:00
Denys Vlasenko
b1c7a66ca6 libbb: extend "errno pointer" trick to other than __GLIBC__
Savings on musl:

function                                             old     new   delta
resume_main                                          582     614     +32
lbb_prepare                                            -      20     +20
seq_main                                             432     449     +17
fgetsetversion                                        74      88     +14
...
script_main                                         1207    1180     -27
close_silently                                        28       -     -28
shell_builtin_ulimit                                 655     626     -29
lineedit_read_key                                    280     247     -33
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 25/123 up/down: 182/-882)      Total: -700 bytes
   text	   data	    bss	    dec	    hex	filename
1005858	    551	   5676	1012085	  f7175	busybox_old
1005136	    551	   5680	1011367	  f6ea7	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01 00:34:44 +02:00
Steffen Trumtrar
6561e07460 mount: support the sizelimit and offset option for loop devices
Starting with linux kernel v5.4 squashfs has a more strict parameter
checking implemented. Unlike util-linux mount, busybox never supported
the sizelimit option but simply forwards it to the kernel.
Since v5.4 mounting will fail with

    squashfs: Unknown parameter 'sizelimit'

Support the sizelimit parameter by setting it in the LOOP_SET_STATUS64
structure before handing it to the kernel.

While at it also add support for the offset option, which currently will
always be set to 0.

function                                             old     new   delta
cut_out_ull_opt                                        -     167    +167
singlemount                                         1230    1266     +36
set_loop                                             834     862     +28
losetup_main                                         479     483      +4
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/0 up/down: 235/0)             Total: 235 bytes

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-10-01 00:31:11 +02:00
Denys Vlasenko
abefc3c276 libbb: fold common64_hash() into its only user
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-09-30 22:22:04 +02:00
Ron Yorston
5c69ad0ecd build system: drop PLATFORM_LINUX
PLATFORM_LINUX is a hidden configuration option which is disabled by
default and enabled at over a hundred locations for features that are
deemed to be Linux specific.

The only effect of PLATFORM_LINUX is to control compilation of
libbb/match_fstype.c.  This file is only needed by mount and umount.

Remove all references to PLATFORM_LINUX and compile match_fstype.c
if mount or umount is enabled.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-08-13 17:12:56 +02:00
Denys Vlasenko
79a4032eef libbb: shrink last_char_is(), no longer allow NULL string argument
function                                             old     new   delta
last_char_is                                          40      28     -12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-07-19 20:49:22 +02:00
Denys Vlasenko
d21a63f9fc libbb: code shrink in last_char_is()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-30 08:33:02 +02:00
Martin Lewis
c9fc15359e compare_string_array: code shrink
Code shrink and prevention of possible out of bounds access.

function                                             old     new   delta
nth_string                                            36      26     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-10)             Total: -10 bytes
   text	   data	    bss	    dec	    hex	filename
 981342	  16915	   1872	1000129	  f42c1	busybox_old
 981332	  16915	   1872	1000119	  f42b7	busybox_unstripped

Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-29 16:09:46 +02:00
Martin Lewis
ac79db6a3b procps: code shrink
function                                             old     new   delta
skip_whitespace_if_prefixed_with                       -      17     +17
procps_read_smaps                                    911     854     -57
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 17/-57)            Total: -40 bytes

Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-29 16:07:20 +02:00
Denys Vlasenko
67e1529b92 nologin: make it possible to build it as single applet
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-24 15:05:22 +02:00
Denys Vlasenko
d5314e7129 suppress a few compile warnings
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-24 09:31:30 +02:00
Denys Vlasenko
5fa5c4bde8 randomconfig fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-23 21:28:19 +02:00
Martin Lewis
9b4a9d96b8 xstrndup: Use strndup instead of implementing it.
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-06-09 01:55:59 +02:00
Ron Yorston
9e2a5668fd ash,hush: allow builtins to be tab-completed, closes 7532
function                                             old     new   delta
complete_cmd_dir_file                                678     830    +152
get_builtin_name                                       -      35     +35
optschanged                                          125     132      +7
hush_main                                           1069    1076      +7
save_command_ps_at_cur_history                        76      78      +2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 203/0)             Total: 203 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2020-01-29 15:23:17 +01:00
Alistair Francis
d3539be8f2 Remove stime() function calls
stime() has been deprecated in glibc 2.31 and replaced with
clock_settime(). Let's replace the stime() function calls with
clock_settime() in preperation.

function                                             old     new   delta
rdate_main                                           197     224     +27
clock_settime                                          -      27     +27
date_main                                            926     941     +15
stime                                                 37       -     -37
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 2/0 up/down: 69/-37)             Total: 32 bytes

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-11-19 13:08:25 +01:00
Denys Vlasenko
f39a71817e read_key(): placate "warning: shifting a negative signed value is undefined"
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-25 17:40:57 +02:00
Denys Vlasenko
af7169b4a7 clang/llvm 9 fix - do not eliminate a store to a fake "const"
This is *much* better (9 kbytes better) than dropping "*const"
optimization trick.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-25 12:12:22 +02:00
Denys Vlasenko
be5a505d77 Remove syscall wrappers around clock_gettime, closes 12091
12091 "Direct use of __NR_clock_gettime is not time64-safe".

function                                             old     new   delta
runsv_main                                          1698    1712     +14
startservice                                         378     383      +5
get_mono                                              31      25      -6
date_main                                            932     926      -6
gettimeofday_ns                                       17       -     -17
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 2/2 up/down: 19/-29)            Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-24 16:26:55 +02:00
Denys Vlasenko
42f454b13b dpkg-deb: work around bogus error message when working with XZ compressed packages
function                                             old     new   delta
unpack_xz_stream                                    2309    2317      +8
bb_full_fd_action                                    464     472      +8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-11 14:11:44 +02:00
Martin Lewis
7011eca83a replace: count_strstr - Handle an edge case where sub is empty
If sub is empty, avoids an infinite loop.

function                                             old     new   delta
count_strstr                                          45      63     +18

Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-09 14:39:41 +02:00
Martin Lewis
dd46861282 libbb: Converted safe_read to safe_write format
Changed safe_read to be symmetrical to safe_write, it shall
never return EINTR because it calls read multiple times,
the error is considered transient.

function                                             old     new   delta
safe_read                                             44      57     +13

Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-09 14:35:55 +02:00
Alistair Francis
902d399292 time: Use 64 prefix syscall if we have to
Some 32-bit architectures no longer have the 32-bit time_t syscalls.
Instead they have suffixed syscalls that returns a 64-bit time_t. If
the architecture doesn't have the non-suffixed syscall and is using a
64-bit time_t let's use the suffixed syscall instead.

This fixes build issues when building for RISC-V 32-bit with 5.1+ kernel
headers.

If an architecture only supports the suffixed syscalls, but is still
using a 32-bit time_t report a compilation error. This avoids us have to
deal with converting between 64-bit and 32-bit values. There are
currently no architectures where this is the case.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-10-08 16:31:54 +02:00
Denys Vlasenko
dac0a7d234 unicode: code shrink in character width determination
function                                             old     new   delta
bb_wcwidth                                           267     238     -29

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-23 11:26:54 +02:00
Denys Vlasenko
4767a5375e libbb: include <crypt.h> only if necessary
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-16 15:09:06 +02:00
James Byrne
6937487be7 libbb: reduce the overhead of single parameter bb_error_msg() calls
Back in 2007, commit 0c97c9d437 ("'simple' error message functions by
Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower
overhead call to bb_perror_msg() when only a string was being printed
with no parameters. This saves space for some CPU architectures because
it avoids the overhead of a call to a variadic function. However there
has never been a simple version of bb_error_msg(), and since 2007 many
new calls to bb_perror_msg() have been added that only take a single
parameter and so could have been using bb_simple_perror_message().

This changeset introduces 'simple' versions of bb_info_msg(),
bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and
bb_herror_msg_and_die(), and replaces all calls that only take a
single parameter, or use something like ("%s", arg), with calls to the
corresponding 'simple' version.

Since it is likely that single parameter calls to the variadic functions
may be accidentally reintroduced in the future a new debugging config
option WARN_SIMPLE_MSG has been introduced. This uses some macro magic
which will cause any such calls to generate a warning, but this is
turned off by default to avoid use of the unpleasant macros in normal
circumstances.

This is a large changeset due to the number of calls that have been
replaced. The only files that contain changes other than simple
substitution of function calls are libbb.h, libbb/herror_msg.c,
libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c,
networking/udhcp/common.h and util-linux/mdev.c additonal macros have
been added for logging so that single parameter and multiple parameter
logging variants exist.

The amount of space saved varies considerably by architecture, and was
found to be as follows (for 'defconfig' using GCC 7.4):

Arm:     -92 bytes
MIPS:    -52 bytes
PPC:   -1836 bytes
x86_64: -938 bytes

Note that for the MIPS architecture only an exception had to be made
disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h)
because it made these files larger on MIPS.

Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-07-02 11:35:03 +02:00
Denys Vlasenko
25a871fb40 libbb: deal with "declaration of 'link' shadows a global declaration" warning
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-25 18:51:00 +02:00
Denys Vlasenko
3a0eea0887 pidof: support "pidof /path/to/binary" case
function                                             old     new   delta
find_pid_by_name                                     230     227      -3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-15 18:35:39 +02:00
Denys Vlasenko
070aa61747 readlink,realpath: fix a case with a symplink, closes 11021
function                                             old     new   delta
xmalloc_realpath_coreutils                           125     201     +76

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-13 17:09:05 +02:00
Denys Vlasenko
3b69ba799f mount,losetup: use /dev/loop-control is it exists
function                                             old     new   delta
get_free_loop                                          -      58     +58
set_loop                                             597     649     +52
losetup_main                                         482     476      -6
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 110/-6)            Total: 104 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-09 23:20:49 +02:00
Denys Vlasenko
3b8025f132 tftp: optional tftp-hpa compat
function                                             old     new   delta
tftp_main                                            276     394    +118

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-09 11:12:02 +02:00
Denys Vlasenko
a5c5dc6f0b passwd: do not set 0 as date of last password change, closes 11951
function                                             old     new   delta
update_passwd                                       1491    1505     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-07 12:30:23 +02:00
Denys Vlasenko
45e3967c20 libbb: move netlink socket binding to the utility function
function                                             old     new   delta
create_and_bind_to_netlink                             -     134    +134
ifplugd_main                                        1117    1052     -65
uevent_main                                          399     306     -93
mdev_main                                            314     215     -99
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/3 up/down: 134/-257)         Total: -123 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-06-03 14:16:52 +02:00
Denys Vlasenko
dff2bd733f libarchive: treat one "FIXME: avoid seek"
function                                             old     new   delta
xmalloc_read_with_initial_buf                          -     205    +205
setup_transformer_on_fd                              154     150      -4
xmalloc_open_zipped_read_close                       143     135      -8
xmalloc_read                                         201      10    -191
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/3 up/down: 205/-203)            Total: 2 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-24 17:03:28 +02:00
Denys Vlasenko
875ce094cf dd: fix handling of short result of full_write(), closes 11711
$ dd bs=1G <sda1 of=/dev/sda1
dd: error writing '/dev/sda1': No space left on device
1+0 records in
0+0 records out
999292928 bytes (953.0MB) copied, 0.784617 seconds, 1.2GB/s

function                                             old     new   delta
write_and_stats                                       99     102      +3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-14 17:49:14 +02:00
Denys Vlasenko
8c317f03f6 style fix, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-05-14 17:26:47 +02:00
James Byrne
253c4e787a Optionally re-introduce bb_info_msg()
Between Busybox 1.24.2 and 1.25.0 the bb_info_msg() function was
eliminated and calls to it changed to be bb_error_msg(). The downside of
this is that daemons now log all messages to syslog at the LOG_ERR level
which makes it hard to filter errors from informational messages.

This change optionally re-introduces bb_info_msg(), controlled by a new
option FEATURE_SYSLOG_INFO, restores all the calls to bb_info_msg() that
were removed (only in applets that set logmode to LOGMODE_SYSLOG or
LOGMODE_BOTH), and also changes informational messages in ifplugd and
ntpd.

The code size change of this is as follows (using 'defconfig' on x86_64
with gcc 7.3.0-27ubuntu1~18.04)

function                                             old     new   delta
bb_info_msg                                            -     182    +182
bb_vinfo_msg                                           -      27     +27
static.log7                                          194     198      +4
log8                                                 190     191      +1
log5                                                 190     191      +1
crondlog                                              45       -     -45
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 3/0 up/down: 215/-45)           Total: 170 bytes

If you don't care about everything being logged at LOG_ERR level
then when FEATURE_SYSLOG_INFO is disabled Busybox actually gets smaller:

function                                             old     new   delta
static.log7                                          194     200      +6
log8                                                 190     193      +3
log5                                                 190     193      +3
syslog_level                                           1       -      -1
bb_verror_msg                                        583     581      -2
crondlog                                              45       -     -45
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 3/1 up/down: 12/-48)            Total: -36 bytes

Signed-off-by: James Byrne <james.byrne@origamienergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-30 10:51:27 +02:00
Denys Vlasenko
f3a064f495 libbbb: find_mount_point() too eager to stat mounted devices
None of the below "devices" (first word on the line) are real.

sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
devtmpfs /dev devtmpfs rw,nosuid,size=7917900k,nr_inodes=1979475,mode=755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,nosuid,nodev,mode=755 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
configfs /sys/kernel/config configfs rw,relatime 0 0
tmpfs /tmp tmpfs rw,relatime 0 0

function                                             old     new   delta
find_mount_point                                     297     302      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-29 17:59:08 +02:00
Denys Vlasenko
fa8878bf1f start-stop-daemon: do try to close fds > 2
sh -c 'exec 3>&1; exec start-stop-daemon -S -b -x /bin/sleep -- 123'

now closes fd 3.

function                                             old     new   delta
bb_daemonize_or_rexec                                183     192      +9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 9/0)                 Total: 9 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-04-29 14:24:07 +02:00
Ron Yorston
3193cb56d6 libbb: mark scripted_main() as externally visible
Building with individual binaries enabled fails when embedded
script applets are included:

   /tmp/ccIvMFZg.o: In function `main':
   applet.c:(.text.main+0x20): undefined reference to `scripted_main'

Mark scripted_main() as externally visible.

Reported-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-03-30 16:46:27 +01:00
Denys Vlasenko
5059653882 do not duplicate CONFIG_PID_FILE_PATH and ".pid" strings
text	   data	    bss	    dec	    hex	filename
 981737	    485	   7296	 989518	  f194e	busybox_old
 981704	    485	   7296	 989485	  f192d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-03-17 19:48:39 +01:00
Ron Yorston
e563f9e851 du: don't count duplicate arguments. Closes 5288
Since coreutils 8.6 (2010-10-15) du no longer counts duplicate arguments.

Revert the relevant part of commit 618a3027ed (du: fix "du /dir /dir"
case).

function                                             old     new   delta
du_main                                              302     297      -5
reset_ino_dev_hashtable                               78       -     -78
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-83)             Total: -83 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-02-19 17:08:39 +01:00
Denys Vlasenko
779f96a24c lineedit: fix SEGV in isk, hexedit, ed, closes 11661
fdisk, hexedit and ed calls read_line_edit in libbb/lineedit.c with NULL
as first argument. On line 2373 of lineedit.c of busybox version 1.29.3,
state->hist_file is referenced without checking the state->flag.

This causes segmentation fault on fdisk, hexedit and ed on ARM Cortex-A9.
It somehow works on x86_64.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-02-04 16:16:30 +01:00
Mark Marshall
11cb9eeffe capability: fix string comparison in cap_name_to_number
The result of strcasecmp was being used incorrectly.  This function
returns 0 if the strings match.

Signed-off-by: Mark Marshall <mark.marshall@omicronenergy.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-21 12:50:37 +01:00
Denys Vlasenko
088fec36fe start-stop-daemon: create pidfile before parent exits, closes 8596
This removes DAEMON_DOUBLE_FORK flag from bb_daemonize_or_rexec(),
as SSD was the only user.

Also includes fix for -S: now works without -a and -x,
does not print pids
(compat with "start-stop-daemon (OpenRC) 0.34.11 (Gentoo Linux)").

function                                             old     new   delta
start_stop_daemon_main                              1018    1084     +66
add_interface                                         99     103      +4
fail_hunk                                            139     136      -3
bb_daemonize_or_rexec                                205     183     -22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 70/-25)             Total: 45 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-14 14:47:21 +01:00
Denys Vlasenko
ff65355b8a single-applet build --help had extra \n, remove
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-01 16:54:30 +01:00
Denys Vlasenko
aad76968cd pmap: make 32-bit version work better on 64-bit kernels
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-31 15:18:45 +01:00
Denys Vlasenko
3d27d435db randomconfig fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-27 18:03:20 +01:00
Denys Vlasenko
23427a63fc lineedit: fix "defined but not used" sigaction2 warning
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 15:45:46 +01:00
Denys Vlasenko
b437df1157 inetd: suppress aliasing warning
function                                             old     new   delta
sigprocmask2                                           -       8      +8
wait_for_child_or_signal                             213     218      +5
dowait                                               424     429      +5
block_CHLD_HUP_ALRM                                   62      59      -3
sigprocmask_SIG_SETMASK                               16       -     -16
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 2/1 up/down: 18/-19)             Total: -1 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 15:35:24 +01:00
Denys Vlasenko
136fe9bede suppress gcc 8 aliasing warnings
function                                             old     new   delta
sigprocmask_SIG_SETMASK                                -      16     +16
wait_for_child_or_signal                             221     213      -8
dowait                                               432     424      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 13:49:15 +01:00
Denys Vlasenko
a68a87cd60 bc: unbreak FEATURE_CLEAN_UP build
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 11:12:38 +01:00
Denys Vlasenko
9a2b6dcc2d libbb: do not misinterpret 0x10-0x19 chars in "\xNNN" too
function                                             old     new   delta
bb_process_escape_sequence                           141     151     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-29 13:16:15 +01:00
Denys Vlasenko
480c7e5dfb libbb: @ in "\x3@" is not a valid hex digit
function                                             old     new   delta
bb_process_escape_sequence                           134     141      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-29 12:34:50 +01:00
Denys Vlasenko
c100535571 cat,nl: fix handling of open errors
$ cat -n does_not_exist; echo $?
cat: does_not_exist: No such file or directory
1

function                                             old     new   delta
print_numbered_lines                                 118     129     +11
nl_main                                              196     201      +5
cat_main                                             421     425      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 20/0)               Total: 20 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-29 11:44:10 +01:00
Ron Yorston
71df2d3589 hush: allow hush to run embedded scripts
Embedded scripts require a shell to be present in the BusyBox
binary.  Allow either ash or hush to be used for this purpose.
If both are enabled ash takes precedence.

The size of the binary is unchanged in the default configuration:
both ash and hush are present but support for embedded scripts
isn't compiled into hush.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-27 16:13:07 +01:00
Denys Vlasenko
f69f207490 libbb: add comment on sha384
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-26 13:00:28 +01:00
Denys Vlasenko
26602b85a3 wget: print the final newline only for non-tty output
$ busybox wget URL 2>&1 | cat
Connecting to ....
install.iso          0% |                                | 2629k  0:02:05 ETA
install.iso          7% |**                              | 25.7M  0:00:23 ETA
install.iso         16% |*****                           | 54.1M  0:00:14 ETA
install.iso         20% |******                          | 67.4M  0:00:15 ETA
install.iso         25% |********                        | 81.0M  0:00:14 ETA
install.iso         30% |*********                       | 97.3M  0:00:13 ETA
install.iso         36% |***********                     |  117M  0:00:12 ETA
install.iso         41% |*************                   |  134M  0:00:11 ETA
install.iso         47% |***************                 |  152M  0:00:10 ETA
install.iso         54% |*****************               |  176M  0:00:08 ETA
install.iso         61% |*******************             |  200M  0:00:06 ETA
install.iso         66% |*********************           |  215M  0:00:06 ETA
install.iso         71% |**********************          |  231M  0:00:05 ETA
install.iso         75% |************************        |  244M  0:00:04 ETA
install.iso         79% |*************************       |  257M  0:00:03 ETA
install.iso         84% |***************************     |  275M  0:00:02 ETA
install.iso         91% |*****************************   |  297M  0:00:01 ETA
install.iso         99% |******************************* |  321M  0:00:00 ETA
install.iso        100% |********************************|  323M  0:00:00 ETA
  <-- no empty line here
$

function                                             old     new   delta
bb_progress_update                                   622     632     +10
progress_meter                                       152     158      +6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 16/0)               Total: 16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-23 19:14:52 +01:00
Ron Yorston
d1b2ae2d04 busybox: add '--show SCRIPT' option to display scripts
Add an option to allow the content of embedded scripts to be
displayed.  This includes applet scripts, custom scripts and the
.profile script.

function                                             old     new   delta
busybox_main                                         624     701     +77
find_script_by_name                                    -      24     +24
scripted_main                                         41      35      -6
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 101/-6)             Total: 95 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-18 19:19:29 +01:00
Ron Yorston
3778898f97 Treat custom and applet scripts as applets
BusyBox has support for embedded shell scripts.  Two types can be
distinguished:  custom scripts and scripts implementing applets.

Custom scripts should be placed in the 'embed' directory at build
time.  They are given a default applet configuration and appear
as applets to the user but no further configuration is possible.

Applet scripts are integrated with the BusyBox build system and
are intended to be used to ship standard applets that just happen
to be implemented as scripts.  They can be configured at build time
and appear just like native applets.

Such scripts should be placed in the 'applets_sh' directory.  A stub
C program should be written to provide the usual applet configuration
details and placed in a suitable subsystem directory.  It may be
helpful to have a configuration option to enable any dependencies the
script requires:  see the 'nologin' applet for an example.

function                                             old     new   delta
scripted_main                                          -      41     +41
applet_names                                        2773    2781      +8
applet_main                                         1600    1604      +4
i2cdetect_main                                       672     674      +2
applet_suid                                          100     101      +1
applet_install_loc                                   200     201      +1
applet_flags                                         100     101      +1
packed_usage                                       33180   33179      -1
tryexec                                              159     152      -7
evalcommand                                         1661    1653      -8
script_names                                           9       -      -9
packed_scripts                                       123     114      -9
complete_cmd_dir_file                                826     811     -15
shellexec                                            271     254     -17
find_command                                        1007     990     -17
busybox_main                                         642     624     -18
run_applet_and_exit                                  100      78     -22
find_script_by_name                                   51       -     -51
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 6/9 up/down: 58/-174)          Total: -116 bytes
   text	   data	    bss	    dec	    hex	filename
 950034	    477	   7296	 957807	  e9d6f	busybox_old
 949918	    477	   7296	 957691	  e9cfb	busybox_unstripped

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-17 21:16:33 +01:00
Ron Yorston
c339c7f7b3 libarchive: add a function to unpack embedded data
Similar code to unpack embedded data is used to decompress usage
messages, embedded scripts and the config file (in the non-default
bbconfig applet).

Moving this code to a common function reduces the size of the default
build and hides more of the internals of libarchive.

function                                             old     new   delta
unpack_bz2_data                                        -     135    +135
bb_show_usage                                        137     157     +20
get_script_content                                    32      47     +15
unpack_scripts                                       119       -    -119
unpack_usage_messages                                124       -    -124
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 2/0 up/down: 170/-243)          Total: -73 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-02 14:14:51 +01:00
Denys Vlasenko
0575c9932d busybox: show embedded scripts in applet list
function                                             old     new   delta
busybox_main                                         624     642     +18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-01 13:58:16 +01:00
Ron Yorston
c9e161277e lineedit: autocompletion for embedded scripts
function                                             old     new   delta
complete_cmd_dir_file                                811     826     +15

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-01 12:51:10 +01:00
Ron Yorston
151de441e7 ash: recognize embedded scripts in SH_STANDALONE mode
function                                             old     new   delta
find_script_by_name                                    -      51     +51
shellexec                                            254     271     +17
find_command                                         990    1007     +17
evalcommand                                         1653    1661      +8
doCommands                                          2233    2222     -11
run_applet_and_exit                                  128     100     -28
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 6/4 up/down: 104/-52)            Total: 52 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-01 11:07:26 +01:00
Denys Vlasenko
aa2959c90d claenups for previous commit
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-01 10:28:04 +01:00
Denys Vlasenko
4f2ef4a836 ash: allow shell scripts to be embedded in the binary
To assist in the deployment of shell scripts it may be convenient
to embed them in the BusyBox binary.

'Embed scripts in the binary' takes any files in the directory
'embed', concatenates them with null separators, compresses them
and embeds them in the binary.

When scripts are embedded in the binary, scripts can be run as
'busybox SCRIPT [ARGS]' or by usual (sym)link mechanism.

embed/nologin is provided as an example.

function                                             old     new   delta
packed_scripts                                         -     123    +123
unpack_scripts                                         -      87     +87
ash_main                                            1103    1171     +68
run_applet_and_exit                                   78     128     +50
get_script_content                                     -      32     +32
script_names                                           -      10     +10
expmeta                                              663     659      -4
------------------------------------------------------------------------------
(add/remove: 4/0 grow/shrink: 2/1 up/down: 370/-4)            Total: 366 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-11-01 10:15:13 +01:00
Rasmus Villemoes
656ca7bdd9 libbb/u_signal_names.c: don't check errno after bb_strtou
Since we're comparing the return value to a smallish integer anyway, we
might as well use that bb_strtou() returns UINT_MAX for malformed
input. Referencing errno is kinda bloaty on glibc.

While NSIG is not in POSIX, we do already rely on it being defined,
compile-time const and smallish, since arrays in struct globals_misc are
defined in terms of it.

function                                             old     new   delta
get_signum                                           312     286     -26

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-10-31 11:28:37 +01:00
Rasmus Villemoes
571e525a14 libbb: optionally honour libc provided SIGRTMIN/SIGRTMAX in get_signum()
When an application documents that it responds such and such to
SIGRTMIN+n, that almost always means with respect to the libc-provided
SIGRTMIN. Hence I disagree with the "more correct" in commit
7b276fc175. In any case, this is rather unfortunate:

36
34

(the first shell is bash). We probably can't change default behaviour
after 7 years, but at least we can provide a config option.

We avoid a little code generation (repeated calls to
__libc_current_sigrtmin) by stashing SIGRTMIN/SIGRTMAX in local
variables, but it does cost ~50 bytes. The next patch serves as penance
for that.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-10-31 11:13:55 +01:00
Denys Vlasenko
93ef5dd640 printf: fix printf "%u\n" +18446744073709551614
function                                             old     new   delta
conv_strtoll                                          19      32     +13
conv_strtoull                                         49      61     +12
bb_strtoll                                            89      84      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 25/-5)              Total: 20 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-10-30 23:24:18 +01:00
Bernhard Reutner-Fischer
3db4e7f84c printf: fix printing +-prefixed numbers
Thanks to Cristian Ionescu-Idbohrn for noticing.

Also fix "%d" '  42' to skip leading whitespace.

function                                             old     new   delta
print_direc                                          435     454     +19
bb_strtoll                                            99     103      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 23/0)               Total: 23 bytes

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2018-10-19 15:27:42 +02:00
Denys Vlasenko
349d72c19c unzip: use printable_string() for printing filenames
function                                             old     new   delta
unzip_main                                          2726    2792     +66
printable_string2                                      -      57     +57
identify                                            4329    4336      +7
expmeta                                              659     663      +4
add_interface                                         99     103      +4
beep_main                                            286     289      +3
changepath                                           192     194      +2
builtin_type                                         115     117      +2
devmem_main                                          469     470      +1
input_tab                                           1076    1074      -2
create_J                                            1821    1819      -2
poplocalvars                                         314     311      -3
doCommands                                          2222    2214      -8
do_load                                              918     902     -16
printable_string                                      57       9     -48
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 8/6 up/down: 146/-79)            Total: 67 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-30 16:56:56 +02:00
Denys Vlasenko
76832ff5c4 date: do not allow "month #20" and such, closes 11356
function                                             old     new   delta
parse_datestr                                        906     961     +55

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-23 20:27:32 +02:00
Chen Yu
05b18065ab remove_file: don't call rmdir if remove_file return failure
When deleting a directory, the directory should not be removed if the
file in the subdirectory fails to be deleted.

Background information:

When I tested the kernel using LTP (linux-test-project).I found the
mv command have some issue. The LTP test case use the mv command to
move the directory t1 in the cgroup file system to the /tmp directory.
becase files in the cgroup file system are not allowed to be removed.
so the mv reported "Permission denied", but I used the ls command to
view the results and found that the directory t1 had been removed
from the cgroup file system. For the same test case, I used the mv
tool in the GNU coreutils, and the directory t1 will not be removed.

the following testcase use busybox mv:

/ # mount -t cgroup -o cpu cgroup /cpu
/ # cd /cpu
/cpu # mkdir -p t1
/cpu # ls
cgroup.clone_children  cpu.cfs_period_us  cpu.stat  t1
cgroup.procs           cpu.cfs_quota_us   notify_on_release  tasks
cgroup.sane_behavior   cpu.shares         release_agent
/cpu # mv t1 /tmp
mv: can't remove 't1/cgroup.procs': Operation not permitted
mv: can't remove 't1/cpu.cfs_period_us': Operation not permitted
mv: can't remove 't1/cpu.stat': Operation not permitted
mv: can't remove 't1/cpu.shares': Operation not permitted
mv: can't remove 't1/cpu.cfs_quota_us': Operation not permitted
mv: can't remove 't1/tasks': Operation not permitted
mv: can't remove 't1/notify_on_release': Operation not permitted
mv: can't remove 't1/cgroup.clone_children': Operation not permitted
/cpu # ls
cgroup.clone_children  cpu.cfs_period_us  cpu.stat  cgroup.procs
cpu.cfs_quota_us       notify_on_release  tasks   cgroup.sane_behavior
cpu.shares             release_agent
/cpu #

This patch fixed it, don't call rmdir if remove_file return failure,
and under certain file systems, the mv could work normally.

Signed-off-by: Chen Yu <yu.chen3@zte.com.cn>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-09 20:16:04 +02:00
Denys Vlasenko
28d91d754e libbb: fix potential NULL pointer use
function                                             old     new   delta
unicode_conv_to_printable2                           193     216     +23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-03 10:36:51 +02:00
Denys Vlasenko
3060992ec9 libbb: fix use-after-free in copy_file
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-03 10:25:29 +02:00
Denys Vlasenko
22a9951620 libbb: in xmalloc_fgets(), use size_t for bb_get_chunk_from_file()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-02 18:48:09 +02:00
Denys Vlasenko
0d598ab9f0 Revert "libbb: remove unnecessary variable in xmalloc_fgets"
The variable is in fact necessary.

    commit 2da9724b56
    Author: Quentin Rameau <quinq@fifth.space>
    Date:   Sun Apr 1 17:05:35 2018 +0200
        libbb: remove unnecessary variable in xmalloc_fgets

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-09-02 18:35:29 +02:00
Denys Vlasenko
6791140123 fix !CONFIG_FLOAT_DURATION build
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-08-26 16:32:16 +02:00
Denys Vlasenko
277e00ed12 Complie libbb/duration.c if ping[6] is selected
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-08-03 18:51:46 +02:00
Denys Vlasenko
4c20d9f2b0 extend fractional duration support to "top -d N.N" and "timeout"
function                                             old     new   delta
parse_duration_str                                     -     168    +168
sleep_for_duration                                     -     157    +157
top_main                                             885     928     +43
timeout_main                                         269     312     +43
handle_input                                         571     614     +43
duration_suffixes                                      -      40     +40
sfx                                                   40       -     -40
sleep_main                                           364      79    -285
------------------------------------------------------------------------------
(add/remove: 4/1 grow/shrink: 3/1 up/down: 494/-325)          Total: 169 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-08-03 18:17:12 +02:00
Denys Vlasenko
41ef41b3e0 hush: fix nested redirects colliding with script fds
This necessitates switch from libc FILE api to a simple
homegrown replacement.
The change which fixes the bug here is the deleting of

	restore_redirected_FILEs();

line. It was prematurely moving (restoring) script fd#3.
The fix is: we don't even _want_ to restore scrit fds,
we are perfectly fine with them being moved.
The only reason we tried to restore them is that FILE api
did not allow moving of FILE->fd.

function                                             old     new   delta
refill_HFILE_and_getc                                  -      93     +93
hfopen                                                 -      90     +90
hfclose                                                -      66     +66
pseudo_exec_argv                                     591     597      +6
hush_main                                           1089    1095      +6
builtin_source                                       209     214      +5
save_fd_on_redirect                                  197     200      +3
setup_redirects                                      320     321      +1
fgetc_interactive                                    235     236      +1
i_peek_and_eat_bkslash_nl                             99      97      -2
expand_vars_to_list                                 1103    1100      -3
restore_redirects                                     99      52     -47
fclose_and_forget                                     57       -     -57
remember_FILE                                         63       -     -63
------------------------------------------------------------------------------
(add/remove: 3/2 grow/shrink: 6/3 up/down: 271/-172)           Total: 99 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-24 16:54:41 +02:00
Denys Vlasenko
4c201c00a3 whitespace fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-17 15:04:17 +02:00
Denys Vlasenko
79fb6ac7a5 cp: optional --reflink support
function                                             old     new   delta
cp_main                                              428     512     +84
copy_file                                           1676    1742     +66

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-13 20:30:02 +02:00
Denys Vlasenko
253f555f01 usage: do not print trailing space for commands which have no arguments
function                                             old     new   delta
bb_show_usage                                        120     130     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-09 18:23:33 +02:00
Denys Vlasenko
e5d5f5b9a7 hexdump: fix short file of zero butes treated as dup
function                                             old     new   delta
bb_dump_dump                                        1466    1491     +25

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-07-03 16:29:06 +02:00
Denys Vlasenko
335766602b testsuite/mount.tests: fix false positive
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-06-28 14:10:00 +02:00
Denys Vlasenko
57dbe4d5ac libbb: crypt() in newer glibc requires include <crypt.h>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-06-27 09:45:20 +02:00
Kartik Agaram
43b17b1cd0 restore documentation on the build config language
Kconfig-language.txt was deleted in commit 4fa499a17b back in 2006.
Move to docs/ as suggested by Xabier Oneca:
  http://lists.busybox.net/pipermail/busybox/2014-May/080914.html
Also update references to it everywhere.

Signed-off-by: Kartik Agaram <akkartik@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-06-06 15:16:48 +02:00
Denys Vlasenko
bf7f103ffb whitespace fix
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-05-26 17:42:00 +02:00
Denys Vlasenko
747162109f realpath,readlink -f: coreutils compat, closes 11021
function                                             old     new   delta
xmalloc_realpath_coreutils                             -     121    +121

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-05-24 17:31:00 +02:00
Denys Vlasenko
2aeb201c97 libbb: new option FEATURE_ETC_SERVICES: if off, /etc/services reads often avoided
In practice, "wget http://host.com/" always uses port 80.
People explicitly set non-standard ports via options or parameters
("telnet 1.2.3.4 567" or "telnet 1.2.3.4 ftp") instead of modifying
/etc/services.

function                                             old     new   delta
telnet_main                                         1466    1464      -2
rdate_main                                           215     198     -17
fakeidentd_main                                      269     252     -17
parse_url                                            459     392     -67
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-103)           Total: -103 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-17 12:43:54 +02:00
Denys Vlasenko
058a153b69 less: fix fallout from "use common routine to set raw termios"
Testcase: (sleep 10; ls) | busybox less

[...]
~           LICENSE
~                  Makefile
~                          Makefile.custom
~                                         Makefile.flags
[...]

less did not want this part:
+		/* dont convert NL to CR+NL on output */
+		newterm->c_oflag &= ~(ONLCR);

function                                             old     new   delta
get_termios_and_make_raw                             108     115      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-16 10:24:48 +02:00
Denys Vlasenko
38ccd6af8a bzip2: fix two crashes on corrupted archives
As it turns out, longjmp'ing into freed stack is not healthy...

function                                             old     new   delta
unpack_usage_messages                                  -      97     +97
unpack_bz2_stream                                    369     409     +40
get_next_block                                      1667    1677     +10
get_bits                                             156     155      -1
start_bunzip                                         212     183     -29
bb_show_usage                                        181     120     -61
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/3 up/down: 147/-91)            Total: 56 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-08 20:05:04 +02:00
Denys Vlasenko
17058a06c4 libbb: switch bb_ask_noecho() to "mallocing" string return API
function                                             old     new   delta
bb_ask_noecho                                        313     330     +17
get_cred_or_die                                      125     115     -10
passwd_main                                          995     958     -37
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 17/-47)            Total: -30 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-07 15:50:30 +02:00
Denys Vlasenko
bae8fc4436 xargs: use bb_ask_y_confirmation_FILE() instead of homegrown copy
function                                             old     new   delta
bb_ask_y_confirmation_FILE                             -      83     +83
inetd_main                                          2033    2043     +10
udhcp_send_kernel_packet                             295     301      +6
rmescapes                                            306     310      +4
send_tree                                            353     355      +2
i2cdetect_main                                       674     672      -2
confirm_or_abort                                      43      38      -5
get_terminal_width_height                            242     234      -8
bb_ask_y_confirmation                                 76      10     -66
xargs_main                                           823     755     -68
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/5 up/down: 105/-149)          Total: -44 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-07 15:23:10 +02:00
Denys Vlasenko
77cb6b99a4 libbb: rename bb_ask -> bb_ask_noecho, bb_ask_confirmation -> bb_ask_y_confirmation
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-07 15:08:12 +02:00
Denys Vlasenko
2f094ae821 telnet: move winsize detection closer to I/O loop, delete non-functioning debug code
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-07 15:02:20 +02:00
Denys Vlasenko
2ab994f707 placate gcc-8.0.1 warnings
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-06 18:26:33 +02:00
Denys Vlasenko
f5018dac21 hush: fix "unset PS1/PS2", and put them into initial variable set
"unset PS1/PS2" causes prompts to be empty strings

function                                             old     new   delta
hush_main                                           1031    1089     +58
goto_new_line                                         27      33      +6
fgetc_interactive                                    244     245      +1
unset_local_var                                      155     149      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 65/-6)              Total: 59 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-06 17:58:21 +02:00
Denys Vlasenko
899ae5337a libbb: new function bb_die_memory_exhausted
function                                             old     new   delta
bb_die_memory_exhausted                                -      10     +10
xstrdup                                               28      23      -5
xsetenv                                               27      22      -5
xrealloc                                              32      27      -5
xputenv                                               22      17      -5
xmalloc                                               30      25      -5
xfdopen_helper                                        40      35      -5
xasprintf                                             44      39      -5
wget_main                                           2387    2382      -5
open_socket                                           54      49      -5
glob_brace                                           419     414      -5
bb_get_chunk_from_file                               146     141      -5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/11 up/down: 10/-55)           Total: -45 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-01 19:59:37 +02:00
Quentin Rameau
e2afae6303 sed: prevent overflow of length from bb_get_chunk_from_file
This fragment did not work right:

                temp = bb_get_chunk_from_file(fp, &len);
                if (temp) {
                        /* len > 0 here, it's ok to do temp[len-1] */
                        char c = temp[len-1];

With "int len" _sign-extending_, temp[len-1] can refer to a wrong location
if len > 0x7fffffff.

Signed-off-by: Quentin Rameau <quinq@fifth.space>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-01 19:51:14 +02:00
Quentin Rameau
2da9724b56 libbb: remove unnecessary variable in xmalloc_fgets
Signed-off-by: Quentin Rameau <quinq@fifth.space>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-04-01 19:45:36 +02:00
Denys Vlasenko
e4defe826b libbb: use BUILD_BUG_ON in utoa_to_buf()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-28 17:12:56 +02:00
Sean MacLennan
d9aabfe578 make busybox more portable
Move some distro specific include files into the appropriate #ifdef
blocks to make the code more portable.

Signed-off-by: Sean MacLennan <seanm@seanm.ca>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-03-04 23:15:59 +01:00
Andy Shevchenko
cc222747ae libbb: Use return value from is_prefixed_with()
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-5 (-5)
Function                                     old     new   delta
skip_dev_pfx                                  30      25      -5
Total: Before=779966, After=779961, chg -0.00%

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-27 13:35:40 +01:00
Ron Yorston
23286900da lineedit: allow window size tracking to be disabled
function                                             old     new   delta
lineedit_read_key                                    269     261      -8
win_changed                                           47       -     -47
read_line_input                                     3884    3821     -63
cmdedit_setwidth                                      63       -     -63
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/2 up/down: 0/-181)           Total: -181 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-25 20:09:54 +01:00
Denys Vlasenko
2af5e3fac3 libbb: compile capability code only if FEATURE_SETPRIV_CAPABILITIES or RUN_INIT
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-21 20:13:39 +01:00
Denys Vlasenko
edccc982e5 progress meter: add disabled code for a more stable ETA
Compiles to ~25 bytes if enabled.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-13 16:48:52 +01:00
Denys Vlasenko
ba3b9dbf06 libbb: introduce and use bb_getsockname()
function                                             old     new   delta
bb_getsockname                                         -      18     +18
xrtnl_open                                            88      83      -5
do_iplink                                           1216    1209      -7
arping_main                                         1686    1668     -18
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/3 up/down: 18/-30)            Total: -12 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-11 14:55:46 +01:00
Denys Vlasenko
47529d3f16 libbb: shrink wget/tftp progress indicator code a bit more
This makes size display 5-char wide instead of 6-char, but now it's smarter
(can show sizes in "12.3M" format).

function                                             old     new   delta
bb_progress_update                                   654     622     -32

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-07 23:48:34 +01:00
Denys Vlasenko
ab843e3244 libbb: shrink wget/tftp progress indicator code for 32-bit
function                                             old     new   delta
bb_progress_update                                   756     654    -102

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-07 17:47:39 +01:00
Denys Vlasenko
1267770a9d fix compile failure in previous commit
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-06 18:01:39 +01:00
Denys Vlasenko
5cdd120f0c unzip: do not set directory mode to 0777
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=882177

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-06 17:59:32 +01:00
Denys Vlasenko
ddacb03e87 libbb: commonalize a bit of little-endian CRC32 table generation code
function                                             old     new   delta
global_crc32_new_table_le                              -      11     +11
crc32_new_table_le                                     -       9      +9
inflate_unzip_internal                               560     556      -4
flash_eraseall_main                                  823     819      -4
unpack_xz_stream                                    2403    2394      -9
lzop_main                                            121     112      -9
gzip_main                                            187     178      -9
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/5 up/down: 20/-35)            Total: -15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-02-01 10:56:19 +01:00
Denys Vlasenko
cca7c611f2 which: fix TODO with NOFORK+malloc_failure misbehaving
function                                             old     new   delta
find_executable                                       86     104     +18
which_main                                           202     194      -8
executable_exists                                     66      51     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 18/-23)             Total: -5 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-12 13:21:33 +01:00
Denys Vlasenko
7367a949a6 libbb: compile obscure() only if FEATURE_PASSWD_WEAK_CHECK=y
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-01-04 15:21:25 +01:00
Denys Vlasenko
82d1c1f84a randomconfig fixes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-12-31 17:30:02 +01:00
Denys Vlasenko
0a67722140 lineedit: get terminal width before printing prompt
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-11-08 13:38:12 +01:00
Denys Vlasenko
c3797d40a1 lineedit: do not tab-complete any strings which have control characters
function                                             old     new   delta
add_match                                             41      68     +27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-11-08 12:35:02 +01:00
James Clarke
518fb3ba19 udp_io, traceroute: Standardise IPv6 PKTINFO handling to be portable
The current standard (RFC 3542) is for IPV6_RECVPKTINFO to be given to
setsockopt, and IPV6_PKTINFO to be used as the packet type. Previously,
RFC 2292 required IPV6_PKTINFO to be used for both, but RFC 3542
re-purposed IPV6_PKTINFO when given to setsockopt. The special
Linux-specific IPV6_2292PKTINFO has the same semantics as IPV6_PKTINFO
in RFC 2292, but was introduced at the same time as IPV6_RECVPKTINFO.

Therefore, if we have IPV6_RECVPKTINFO available, we can use the RFC
3542 style, and if not, we assume that only the RFC 2292 API is
available, using IPV6_PKTINFO for both.

Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-30 16:06:50 +01:00
James Clarke
24e17b4385 xfuncs: Handle missing non-POSIX termios constants
Signed-off-by: James Clarke <jrtc27@jrtc27.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-30 15:18:32 +01:00
Avi Halachmi
0fd5dbba8f lineedit: improve multiline PS1 - redraw using last PS1 line. Closes 10381
This patch only affects prompts with newlines.

We redraw the prompt [+ input] occasionally, e.g. during tab completion,
history browsing or search, etc, and we expect it to align with prior
redraws, such that the visible effect is that only the input changes.

With multi-line PS1, redraw always printed the prompt some lines below
the old one, which resulted in terminal scroll during every redraw.

Now we only redraw the last PS1 line, so vertical alignment is easier to
manage (we already calculated it using only the last line, but re-drew
all lines - that was the culprit), which fixes those extra scrolls.

Notes:
- We now use the full prompt for the initial draw, after clear-screen (^L),
  and after tab-completion choices are displayed. Everything else now
  redraws using the last/sole prompt line.

- During terminal resize we now only redraw the last[/sole] prompt line,
  which is arguably better because it's hard to do right (and we never did).

- Good side effect for reverse-i-search: its prompt now replaces only the
  last line of the original prompt - like other shells do.

function                                             old     new   delta
put_prompt_custom                                      -      66     +66
draw_custom                                            -      66     +66
parse_and_put_prompt                                 766     806     +40
read_line_input                                     3867    3884     +17
input_tab                                           1069    1076      +7
cmdedit_setwidth                                      61      63      +2
redraw                                                59      47     -12
put_prompt                                            46       -     -46
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 4/1 up/down: 198/-58)           Total: 140 bytes

Signed-off-by: Avi Halachmi <avihpit@yahoo.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-12 18:26:13 +02:00
Denys Vlasenko
2ab9403119 whitespace and comment format fixes, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-05 15:33:28 +02:00
Denys Vlasenko
a02a4e9830 whitespace and comment format fixes, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-05 15:19:25 +02:00
Denys Vlasenko
416899fca6 do not include <sys/stat.h> just before "libbb.h", it's there already
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-05 14:41:36 +02:00
Denys Vlasenko
ebe6d9d875 whitespace and comment format fixes, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-10-05 14:40:24 +02:00
Denys Vlasenko
0c4dbd481a regularize format of source file headers, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-18 16:28:43 +02:00
Denys Vlasenko
7735e52df4 Clarify OPOST bit meaning
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-15 17:19:55 +02:00
Denys Vlasenko
aaaaaa5ad6 less,microcom,lineedit: use common routine to set raw termios
function                                             old     new   delta
get_termios_and_make_raw                               -     139    +139
xget1                                                 39       8     -31
read_line_input                                     3912    3867     -45
less_main                                           2525    2471     -54
set_termios_to_raw                                   116      36     -80
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 139/-210)          Total: -71 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-15 17:14:01 +02:00
Denys Vlasenko
8187e01438 *: use ESC define instead of "\033"; use ESC[m instead of ESC[0m
text	   data	    bss	    dec	    hex	filename
 922535	    481	   6832	 929848	  e3038	busybox_old
 922534	    481	   6832	 929847	  e3037	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-09-13 22:48:30 +02:00
Denys Vlasenko
6016181b68 hush: GETOPT_RESET() _after_ getopts too.
NOEXEC'ed applets which use getopt() need this.

function                                             old     new   delta
builtin_getopts                                      403     413     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-29 14:32:17 +02:00
Denys Vlasenko
200bcc851a run-init: new applet
function                                             old     new   delta
switch_root_main                                     354     637    +283
drop_usermodehelper                                    -     157    +157
cap_name_to_number                                     -      77     +77
packed_usage                                       31707   31743     +36
applet_names                                        2665    2674      +9
applet_main                                         1544    1548      +4
applet_install_loc                                   193     194      +1
setpriv_main                                         933     928      -5
getcaps                                              131     122      -9
parse_cap                                            117      29     -88
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 5/3 up/down: 567/-102)          Total: 465 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-21 19:30:01 +02:00
Denys Vlasenko
44b3f2ffbc libbb: move capability names code to libbb
function                                             old     new   delta
cap_name_to_number                                     -      77     +77
parse_cap                                            117      29     -88
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/1 up/down: 77/-88)            Total: -11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-21 02:14:19 +02:00
Denys Vlasenko
bc9bbeb2b8 libarchive: do not extract unsafe symlinks unless $EXTRACT_UNSAFE_SYMLINKS=1
function                                             old     new   delta
unsafe_symlink_target                                  -     147    +147
unzip_main                                          2711    2732     +21
copy_file                                           1657    1678     +21
tar_main                                             999     971     -28
data_extract_all                                    1038     984     -54
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/2 up/down: 189/-82)           Total: 107 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-10 11:52:42 +02:00
Denys Vlasenko
22542eca18 getopt32: remove opt_complementary
function                                             old     new   delta
vgetopt32                                           1318    1392     +74
runsvdir_main                                        703     713     +10
bb_make_directory                                    423     425      +2
collect_cpu                                          546     545      -1
opt_chars                                              3       -      -3
opt_complementary                                      4       -      -4
tftpd_main                                           567     562      -5
ntp_init                                             476     471      -5
zcip_main                                           1266    1256     -10
xxd_main                                             428     418     -10
whois_main                                           140     130     -10
who_main                                             463     453     -10
which_main                                           212     202     -10
wget_main                                           2535    2525     -10
watchdog_main                                        291     281     -10
watch_main                                           222     212     -10
vlock_main                                           399     389     -10
uuencode_main                                        332     322     -10
uudecode_main                                        316     306     -10
unlink_main                                           45      35     -10
udhcpd_main                                         1482    1472     -10
udhcpc_main                                         2762    2752     -10
tune2fs_main                                         290     280     -10
tunctl_main                                          366     356     -10
truncate_main                                        218     208     -10
tr_main                                              518     508     -10
time_main                                           1134    1124     -10
tftp_main                                            286     276     -10
telnetd_main                                        1873    1863     -10
tcpudpsvd_main                                      1785    1775     -10
taskset_main                                         521     511     -10
tar_main                                            1009     999     -10
tail_main                                           1644    1634     -10
syslogd_main                                        1967    1957     -10
switch_root_main                                     368     358     -10
svlogd_main                                         1454    1444     -10
sv                                                  1296    1286     -10
stat_main                                            104      94     -10
start_stop_daemon_main                              1028    1018     -10
split_main                                           542     532     -10
sort_main                                            796     786     -10
slattach_main                                        624     614     -10
shuf_main                                            504     494     -10
setsid_main                                           96      86     -10
setserial_main                                      1132    1122     -10
setfont_main                                         388     378     -10
setconsole_main                                       78      68     -10
sendmail_main                                       1209    1199     -10
sed_main                                             677     667     -10
script_main                                         1077    1067     -10
run_parts_main                                       325     315     -10
rtcwake_main                                         454     444     -10
rm_main                                              175     165     -10
reformime_main                                       119     109     -10
readlink_main                                        123     113     -10
rdate_main                                           246     236     -10
pwdx_main                                            189     179     -10
pstree_main                                          317     307     -10
pscan_main                                           663     653     -10
popmaildir_main                                      818     808     -10
pmap_main                                             80      70     -10
nc_main                                             1042    1032     -10
mv_main                                              558     548     -10
mountpoint_main                                      477     467     -10
mount_main                                          1264    1254     -10
modprobe_main                                        768     758     -10
modinfo_main                                         333     323     -10
mktemp_main                                          200     190     -10
mkswap_main                                          324     314     -10
mkfs_vfat_main                                      1489    1479     -10
microcom_main                                        715     705     -10
md5_sha1_sum_main                                    521     511     -10
man_main                                             867     857     -10
makedevs_main                                       1052    1042     -10
ls_main                                              563     553     -10
losetup_main                                         432     422     -10
loadfont_main                                         89      79     -10
ln_main                                              524     514     -10
link_main                                             75      65     -10
ipcalc_main                                          544     534     -10
iostat_main                                         2397    2387     -10
install_main                                         768     758     -10
id_main                                              480     470     -10
i2cset_main                                         1239    1229     -10
i2cget_main                                          380     370     -10
i2cdump_main                                        1482    1472     -10
i2cdetect_main                                       682     672     -10
hwclock_main                                         406     396     -10
httpd_main                                           741     731     -10
grep_main                                            837     827     -10
getty_main                                          1559    1549     -10
fuser_main                                           297     287     -10
ftpgetput_main                                       345     335     -10
ftpd_main                                           2232    2222     -10
fstrim_main                                          251     241     -10
fsfreeze_main                                         77      67     -10
fsck_minix_main                                     2921    2911     -10
flock_main                                           314     304     -10
flashcp_main                                         740     730     -10
flash_eraseall_main                                  833     823     -10
fdformat_main                                        532     522     -10
expand_main                                          680     670     -10
eject_main                                           335     325     -10
dumpleases_main                                      630     620     -10
du_main                                              314     304     -10
dos2unix_main                                        441     431     -10
diff_main                                           1350    1340     -10
df_main                                             1064    1054     -10
date_main                                           1095    1085     -10
cut_main                                             961     951     -10
cryptpw_main                                         228     218     -10
crontab_main                                         575     565     -10
crond_main                                          1149    1139     -10
cp_main                                              370     360     -10
common_traceroute_main                              3834    3824     -10
common_ping_main                                    1767    1757     -10
comm_main                                            239     229     -10
cmp_main                                             655     645     -10
chrt_main                                            379     369     -10
chpst_main                                           704     694     -10
chpasswd_main                                        308     298     -10
chown_main                                           171     161     -10
chmod_main                                           158     148     -10
cat_main                                             428     418     -10
bzip2_main                                           120     110     -10
blkdiscard_main                                      264     254     -10
base64_main                                          221     211     -10
arping_main                                         1665    1655     -10
ar_main                                              556     546     -10
adjtimex_main                                        406     396     -10
adduser_main                                         882     872     -10
addgroup_main                                        411     401     -10
acpid_main                                          1198    1188     -10
optstring                                             11       -     -11
opt_string                                            18       -     -18
OPT_STR                                               25       -     -25
ubi_tools_main                                      1288    1258     -30
ls_options                                            31       -     -31
------------------------------------------------------------------------------
(add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383)      Total: -1297 bytes
   text	   data	    bss	    dec	    hex	filename
 915428	    485	   6876	 922789	  e14a5	busybox_old
 914629	    485	   6872	 921986	  e1182	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-08 21:55:02 +02:00
Denys Vlasenko
036585a911 getopt32: remove applet_long_options
FEATURE_GETOPT_LONG made dependent on LONG_OPTS.

The folloving options are removed, now LONG_OPTS enables long options
for affected applets:
FEATURE_ENV_LONG_OPTIONS	FEATURE_EXPAND_LONG_OPTIONS
FEATURE_UNEXPAND_LONG_OPTIONS	FEATURE_MKDIR_LONG_OPTIONS
FEATURE_MV_LONG_OPTIONS		FEATURE_RMDIR_LONG_OPTIONS
FEATURE_ADDGROUP_LONG_OPTIONS	FEATURE_ADDUSER_LONG_OPTIONS
FEATURE_HWCLOCK_LONG_OPTIONS	FEATURE_NSENTER_LONG_OPTS
FEATURE_CHCON_LONG_OPTIONS	FEATURE_RUNCON_LONG_OPTIONS

They either had a small number of long options, or their long options are
essential.

Example: upstream addgroup and adduser have ONLY longopts,
we should probably go further and get rid
of non-standard short options.

To this end, make addgroup and adduser "select LONG_OPTS".
We had this breakage caused by us even in our own package!
	#if ENABLE_LONG_OPTS || !ENABLE_ADDGROUP
                /* We try to use --gid, not -g, because "standard" addgroup
                 * has no short option -g, it has only long --gid.
                 */
                argv[1] = (char*)"--gid";
	#else
                /* Breaks if system in fact does NOT use busybox addgroup */
                argv[1] = (char*)"-g";
	#endif

xargs: its lone longopt no longer depends on DESKTOP, only on LONG_OPTS.

hwclock TODO: get rid of incompatible -t, -l aliases to --systz, --localtime

Shorten help texts by omitting long option when short opt alternative exists.

Reduction of size comes from the fact that store of an immediate
(an address of longopts) to a fixed address (global variable)
is a longer insn than pushing that immediate or passing it in a register.
This effect is CPU-agnostic.

function                                             old     new   delta
getopt32                                            1350      22   -1328
vgetopt32                                              -    1318   +1318
getopt32long                                           -      24     +24
tftpd_main                                           562     567      +5
scan_recursive                                       376     380      +4
collect_cpu                                          545     546      +1
date_main                                           1096    1095      -1
hostname_main                                        262     259      -3
uname_main                                           259     255      -4
setpriv_main                                         362     358      -4
rmdir_main                                           191     187      -4
mv_main                                              562     558      -4
ipcalc_main                                          548     544      -4
ifenslave_main                                       641     637      -4
gzip_main                                            192     188      -4
gunzip_main                                           77      73      -4
fsfreeze_main                                         81      77      -4
flock_main                                           318     314      -4
deluser_main                                         337     333      -4
cp_main                                              374     370      -4
chown_main                                           175     171      -4
applet_long_options                                    4       -      -4
xargs_main                                           894     889      -5
wget_main                                           2540    2535      -5
udhcpc_main                                         2767    2762      -5
touch_main                                           436     431      -5
tar_main                                            1014    1009      -5
start_stop_daemon_main                              1033    1028      -5
sed_main                                             682     677      -5
script_main                                         1082    1077      -5
run_parts_main                                       330     325      -5
rtcwake_main                                         459     454      -5
od_main                                             2169    2164      -5
nl_main                                              201     196      -5
modprobe_main                                        773     768      -5
mkdir_main                                           160     155      -5
ls_main                                              568     563      -5
install_main                                         773     768      -5
hwclock_main                                         411     406      -5
getopt_main                                          622     617      -5
fstrim_main                                          256     251      -5
env_main                                             198     193      -5
dumpleases_main                                      635     630      -5
dpkg_main                                           3991    3986      -5
diff_main                                           1355    1350      -5
cryptpw_main                                         233     228      -5
cpio_main                                            593     588      -5
conspy_main                                         1135    1130      -5
chpasswd_main                                        313     308      -5
adduser_main                                         887     882      -5
addgroup_main                                        416     411      -5
ftpgetput_main                                       351     345      -6
get_terminal_width_height                            242     234      -8
expand_main                                          690     680     -10
static.expand_longopts                                18       -     -18
static.unexpand_longopts                              27       -     -27
mkdir_longopts                                        28       -     -28
env_longopts                                          30       -     -30
static.ifenslave_longopts                             34       -     -34
mv_longopts                                           46       -     -46
static.rmdir_longopts                                 48       -     -48
packed_usage                                       31739   31687     -52
------------------------------------------------------------------------------
(add/remove: 2/8 grow/shrink: 3/49 up/down: 1352/-1840)      Total: -488 bytes
   text	   data	    bss	    dec	    hex	filename
 915681	    485	   6880	 923046	  e15a6	busybox_old
 915428	    485	   6876	 922789	  e14a5	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-08 17:09:40 +02:00
Denys Vlasenko
ddd1ee4443 libbb: simplify NOFORK/NOEXEC defines, move set_task_comm to libbb
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-08 14:09:23 +02:00
Denys Vlasenko
8858a9864e libbb: rearrange NOFORK/NOEXEC code, logic is not changed
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-08 01:21:49 +02:00
Denys Vlasenko
80e8e3cc05 noexec: consolidate code
function                                             old     new   delta
run_noexec_applet_and_exit                             -      61     +61
find_applet_by_name                                  128     124      -4
run_applet_no_and_exit                               441     434      -7
tryexec                                              169     152     -17
pseudo_exec_argv                                     338     321     -17
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/6 up/down: 61/-48)             Total: 13 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07 19:24:57 +02:00
Denys Vlasenko
c9c1ccc4ed noexec: do GETOPT_RESET() before entering APPLET_main()
hush -c 'yes | head -1' was not happy.

function                                             old     new   delta
tryexec                                              159     169     +10
pseudo_exec_argv                                     328     338     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07 18:59:35 +02:00
Denys Vlasenko
f2cf1cc716 noexec: set comm field for noexecs
function                                             old     new   delta
set_task_comm                                          -      18     +18
tryexec                                              152     159      +7
pseudo_exec_argv                                     321     328      +7
main                                                 106      97      -9
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/2 up/down: 34/-13)             Total: 23 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07 18:45:33 +02:00
Denys Vlasenko
248a67fb75 free,stat: make NOEXEC
pkill/pgrep/pidof uncovered another quirk: what about noexec's _process names_?

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07 18:18:09 +02:00
Denys Vlasenko
798b94518e ubi tools: ubiupdatevol supports "-" input and actually respects -s SIZE
Decided to not make any flash applets NOEXEC.
Minor robustifications here and there. Better error messages. Save on strings:

function                                             old     new   delta
ubi_tools_main                                      1235    1288     +53
ubi_get_volid_by_name                                125     133      +8
ubirename_main                                       198     204      +6
get_num_from_file                                     90      94      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 71/0)               Total: 71 bytes
   text	   data	    bss	    dec	    hex	filename
 915696	    485	   6880	 923061	  e15b5	busybox_old
 915670	    485	   6880	 923035	  e159b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-07 16:00:25 +02:00
Denys Vlasenko
2262746e2b slattach: code shrink, better --help text
function                                             old     new   delta
tcsetattr_serial_or_warn                               -      34     +34
static.int_N_SLIP                                      -       4      +4
restore_state_and_exit                               123     117      -6
packed_usage                                       31774   31747     -27
set_termios_state_or_warn                             42       -     -42
slattach_main                                        673     624     -49
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/3 up/down: 38/-124)           Total: -86 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-06 17:14:09 +02:00
Denys Vlasenko
32b60cc0db kbd_mode: try harder to find console device if -C TTY is not given
Was (under X):
	$ ./busybox_old kbd_mode
	kbd_mode: ioctl 0x4b44 failed: Inappropriate ioctl for device
Now:
	$ ./busybox kbd_mode
	The keyboard is in off mode

function                                             old     new   delta
kbd_mode_main                                        166     174      +8
packed_usage                                       31782   31764     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 8/-18)             Total: -10 bytes
   text	   data	    bss	    dec	    hex	filename
 915757	    485	   6880	 923122	  e15f2	busybox_old
 915747	    485	   6880	 923112	  e15e8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-06 12:17:46 +02:00
Denys Vlasenko
50db1f29bf sysctl: recognize ";comment" and "<whitespace>#comment" lines
function                                             old     new   delta
config_read                                          639     699     +60

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05 18:20:34 +02:00
Denys Vlasenko
20077c1429 libbb: make trim() return pointer to terminating NUL
function                                             old     new   delta
trim                                                  80      90     +10
angle_address                                         56      50      -6
sysctl_main                                          282     273      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: +10/-15)           Total:  -5 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05 17:50:35 +02:00
Denys Vlasenko
9cf89cdf84 sysctl: fix file parsing, do not require -w for VAR=VAL
function                                             old     new   delta
sysctl_act_on_setting                                  -     451    +451
sysctl_main                                          222     282     +60
packed_usage                                       31744   31793     +49
config_read                                          604     639     +35
sysctl_act_recursive                                 612     163    -449
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/1 up/down: 595/-449)          Total: 146 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-05 13:45:22 +02:00
Denys Vlasenko
b182e9ad60 libbb: use _exit, not exit, in bb_daemonize_or_rexec()
By the time we reach exit in parent, child already exited or execed.
We should not re-run libc cleanup code.

While at it, introduce bb_daemon_helper() and add a few comments.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 23:04:17 +02:00
Denys Vlasenko
dd5a40246b getopt32: move support for "always treat first arg as option" to users (tar/ar)
Now getopt() never leaks (and never performs) any xmalloc's.

function                                             old     new   delta
ar_main                                              522     556     +34
tar_main                                             986    1014     +28
getopt32                                            1458    1350    -108
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 62/-108)           Total: -46 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 16:46:17 +02:00
Denys Vlasenko
727948e585 getopt32: factor out code to treat all args as options
Working towards making getopt32() xmalloc-free

function                                             old     new   delta
make_all_argv_opts                                     -      58     +58
top_main                                             914     912      -2
getopt32                                            1517    1458     -59
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/2 up/down: 58/-61)             Total: -3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 16:33:23 +02:00
Denys Vlasenko
19c9f31af1 nofork: fix a bug uncovered by hush testsuite (forgotten fflush)
function                                             old     new   delta
run_nofork_applet                                    280     287      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 19:52:47 +02:00
Denys Vlasenko
39194f0309 new NOFORKs: pwdx,kill[all5],ttysize,realpath,readlink NOEXECs: date,resize
function                                             old     new   delta
run_nofork_applet                                    258     280     +22
readlink_main                                        112     123     +11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 33/0)               Total: 33 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 19:03:32 +02:00
Denys Vlasenko
84ea60ed65 line editing: make read_line_input() not take timeout param
It's almost always -1.

function                                             old     new   delta
read_line_input                                     3902    3912     +10
new_line_input_t                                      24      31      +7
pgetc                                                583     585      +2
save_command_ps_at_cur_history                        80      78      -2
read_line                                             76      74      -2
fgetc_interactive                                    246     244      -2
addLines                                              84      82      -2
doCommands                                          2226    2222      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/5 up/down: 19/-12)              Total: 7 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 17:27:28 +02:00
Denys Vlasenko
95f7953f2c do not use `a' quoting style in comments
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 14:26:33 +02:00
Ron Yorston
008fc9499a libbb: remove vdprintf
Two reasons:

* it's only built for GNU C Library versions < 2 (released 1997)

* it isn't used anywhere in BusyBox

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 17:30:21 +02:00
Denys Vlasenko
147d2ce3dd standalone shell / prefer_applets: fix "exe" in comm fields
function                                             old     new   delta
main                                                  92     106     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 02:19:01 +02:00
Denys Vlasenko
f128bdbbd7 shell: make standalone shell tab-complete "busybox"
function                                             old     new   delta
busybox_main                                           -     624    +624
packed_usage                                       31758   31777     +19
applet_names                                        2638    2646      +8
applet_main                                         1528    1532      +4
applet_install_loc                                   191     192      +1
run_applet_and_exit                                  681      78    -603
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/1 up/down: 656/-603)           Total: 53 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 00:59:24 +02:00
Denys Vlasenko
86d5bf4246 config: trim/improve item names and help texts.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27 02:59:13 +02:00
Denys Vlasenko
86981e3ad2 ash: allow "trap NUM [SIG]..." syntax
While at it, make get_signum() return -1 for numeric strings >= NSIG.

function                                             old     new   delta
trapcmd                                              292     306     +14
get_signum                                           295     300      +5
builtin_trap                                         413     412      -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 19/-1)              Total: 18 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-25 20:06:17 +02:00
Denys Vlasenko
ef0366eb4f libbb: avoid malloc/free in bb_unsetenv()
function                                             old     new   delta
bb_unsetenv                                           55      83     +28

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-22 02:15:17 +02:00
Denys Vlasenko
72089cf6b4 config: deindent all help texts
Those two spaces after tab have no effect, and always a nuisance when editing.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-21 09:50:55 +02:00
Denys Vlasenko
a3df2fa525 config: merge "Busybox Settings" and "Busybox Library Tuning" into one menu
Tweak a few help texts while at it

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-15 20:49:32 +02:00
Johannes Schindelin
e5b1f5af73 copyfd: guard use of munmap() with #if (windows builds need this)
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-15 11:44:13 +02:00
Denys Vlasenko
7d7c7bb220 libbb: hide getnetbyaddr() inside "#if ENABLE_FEATURE_ETC_NETWORKS" block
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-14 20:17:17 +02:00
Denys Vlasenko
90678f0cd7 xxd: allow "-" as file name meaning stdin
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-14 16:29:30 +02:00
Denys Vlasenko
63214a68f1 libbb/dump: allow skipping over stdin too
function                                             old     new   delta
next                                                 294     265     -29

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-14 16:18:16 +02:00
Denys Vlasenko
5f7904b6d1 libbb/dump: fix a few broken commits and shrink code
function                                             old     new   delta
next                                                 310     294     -16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-14 16:03:43 +02:00
Denys Vlasenko
a03ac60677 libbb: safe_write should not return EINTR
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-14 14:22:09 +02:00
Denys Vlasenko
75e90b1548 cat: fix "cat -An" ignoring -n; make numbering go througn all files
function                                             old     new   delta
cat_main                                             418     428     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-14 10:47:18 +02:00
Denys Vlasenko
12a4f9afe7 libbb: do not die if setgid/setuid(real_id) on startup fails
Based on a patch from Steven McDonald <steven@steven-mcdonald.id.au>:

This makes 'unshare --user' work correctly in the case where the user's
shell is provided by busybox itself.

'unshare --user' creates a new user namespace without any uid mappings.
As a result, /bin/busybox is setuid nobody:nogroup within the
namespace, as that is the only user. However, since no uids are mapped,
attempting to call setgid/setuid fails, even though this would do
nothing:

  $ unshare --user ./busybox.broken ash
  ash: setgid: Invalid argument

'unshare --map-root-user' still works, but because Linux only allows
uid/gid mappings to be set up once, creating a root mapping makes such
a namespace useless for creating multi-user containers.

With this patch, setgid and setuid will not be called in the case where
they would do nothing, which is always the case inside a new user
namespace because all uids are effectively mapped to nobody:

  $ id -u
  1000
  $ ls -lh busybox.fixed
  -rwsr-xr-x    1 root     root      826.2K May 21 00:33 busybox.fixed
  $ unshare --user ./busybox.fixed ash
  $ id -u
  65534

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-10 09:17:43 +02:00
Denys Vlasenko
69a5ec9dcc main: fix the case where user has "halt" as login shell. Closes 9986
halt::0:0::/:/sbin/halt

function                                             old     new   delta
run_applet_and_exit                                  748     751      +3
run_applet_no_and_exit                               467     459      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-07 19:08:56 +02:00
Denys Vlasenko
a8cf9c5a3f libbb: new function bb_getgroups() - allocating wrapper around getgroups()
function                                             old     new   delta
bb_getgroups                                           -     111    +111
nexpr                                                843     757     -86
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/1 up/down: 111/-86)            Total: 25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-04 18:56:45 +02:00
Denys Vlasenko
d1f222c3b0 Change BB_EXTRA_VERSION: now it needs to contain any spaces/parenthesis
Before this change, BB_EXTRA_VERSION of "" resulted in:

	"BusyBox v1.28.0.git () multi-call binary"

message, after the fix it is:

	"BusyBox v1.28.0.git multi-call binary"

While at it, eliminate BB_BT and BANNER single-use macros.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-04 16:01:12 +02:00
Denys Vlasenko
d4e4fdb5ce fixes for bugs found by make_single_applets.sh
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-03 21:31:16 +02:00
Denys Vlasenko
10ad622dc2 Spelling fixes in comments, documentation, tests and examples
By klemens <ka7@github.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-17 16:13:32 +02:00
Denys Vlasenko
44c0ab4102 libbb: fix "error: redefinition of 'is_tty_secure'"
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-13 17:55:05 +02:00
Denys Vlasenko
a3de0b3b86 libbb: make check_password() also return CHECKPASS_PW_HAS_EMPTY_PASSWORD
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-13 13:04:05 +02:00
Denys Vlasenko
335681ca8e su: FEATURE_SU_BLANK_PW_NEEDS_SECURE_TTY
When this feature is enabled, blank passwords are not accepted by su
unless the user is on a secure TTY defined in /etc/securetty. This
resembles the default PAM configuration of some Linux distros which
specify the nullok_secure option for pam_unix.so.

Based on patch by Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-13 12:57:04 +02:00
Kaarle Ritvanen
517a82c5b6 login: move check_securetty to libbb
Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-13 12:39:03 +02:00
Kaarle Ritvanen
835ad3a984 libbb: GETOPT_RESET macro
Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-12 20:11:34 +02:00
Denys Vlasenko
d9eb40c185 fix errors found with make_single_applets.sh
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-12 15:48:19 +02:00
Denys Vlasenko
8a134ec680 libbb: move isqrt from factor, use it in diff too
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-11 07:34:56 +02:00
Denys Vlasenko
4f0b540d08 modprobe: do not descend into /etc/modprobe.d/DIR/. Closes 8686
Also expanded comments in recursive_action.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-04-06 15:23:26 +02:00
Denys Vlasenko
ab518eea9c mount: create loop devices with LO_FLAGS_AUTOCLEAR flag
The "autolooped" mount (mount [-oloop] IMAGE /DIR/DIR)
always creates AUTOCLEARed loopdevs, so that umounting
drops them (and this does not require any code in the
umount userspace).
This happens since circa linux-2.6.25:
	commit 96c5865559cee0f9cbc5173f3c949f6ce3525581
	Date:    Wed Feb 6 01:36:27 2008 -0800
	Subject: Allow auto-destruction of loop devices
IOW: in this case, umount does not have to use -d
to drop the loopdev.

The explicit loop mount (mount /dev/loopN /DIR/DIR)
does not do this. In this case, umount without -d
should not drop loopdev.
Unfortunately, bbox umount currently always implies -d,
this probably needs fixing.

function                                             old     new   delta
set_loop                                             537     597     +60
singlemount                                         1101    1138     +37
losetup_main                                         419     432     +13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 110/0)             Total: 110 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-03-16 16:55:47 +01:00