Commit Graph

14483 Commits

Author SHA1 Message Date
Denys Vlasenko
6c73aaff38 cryptpw: support "rounds=NNNNNNN$" thing in salts
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 21:48:31 +01:00
Denys Vlasenko
16e7f697f8 libbb: eliminate redundant variable in sha_crypt
function                                             old     new   delta
sha_crypt                                           1136    1130      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 20:59:32 +01:00
Denys Vlasenko
b8935d00b0 sha512: use larger constant table only if sha512 is in fact selected
function                                             old     new   delta
sha_K                                                640     256    -384

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 20:16:27 +01:00
Denys Vlasenko
3f8ecd933a tls: rearrange code, add/improve comments, fix whitespace, no real changes here
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 14:16:51 +01:00
Denys Vlasenko
c5540d61f6 tls: send CHANGE_CIPHER_SPEC
To "actually implement it" will take more work...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 02:17:03 +01:00
Denys Vlasenko
f78ad0938b whitespace fix
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 00:18:22 +01:00
Denys Vlasenko
11d0096516 tls: format and send CLIENT_KEY_EXCHANGE
$ ./busybox tls kernel.org
insize:0 tail:0
got block len:74
got HANDSHAKE
got SERVER_HELLO
insize:79 tail:4265
got block len:4392
got HANDSHAKE
got CERTIFICATE
entered der @0x8b217a7:0x30 len:1452 inner_byte @0x8b217ab:0x30
entered der @0x8b217ab:0x30 len:1172 inner_byte @0x8b217af:0xa0
skipped der 0xa0, next byte 0x02
skipped der 0x02, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
entered der @0x8b218b4:0x30 len:418 inner_byte @0x8b218b8:0x30
skipped der 0x30, next byte 0x03
entered der @0x8b218c7:0x03 len:399 inner_byte @0x8b218cb:0x00
key bytes:399, first:0x00
entered der @0x8b218cc:0x30 len:394 inner_byte @0x8b218d0:0x02
binary bytes:385, first:0x00
skipped der 0x02, next byte 0x02
binary bytes:3, first:0x01
server_rsa_pub_key.size:384
insize:4397 tail:9
got block len:4
got SERVER_HELLO_DONE
insize:9 tail:0
^C

Next step: send CHANGE_CIPHER_SPEC... and actually implement it.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-15 00:12:42 +01:00
Denys Vlasenko
2a17d1fc9b tls: DER length byte 0x81 is actually valid
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-14 22:38:25 +01:00
Denys Vlasenko
b1003f7019 tls: a bit more work
$ ./busybox tls kernel.org
insize:0 tail:0
got block len:74
got HANDSHAKE
got SERVER_HELLO
insize:79 tail:4406
got block len:4392
got HANDSHAKE
got CERTIFICATE
entered der @0x8f7e723:0x30 len:1452 inner_byte @0x8f7e727:0x30
entered der @0x8f7e727:0x30 len:1172 inner_byte @0x8f7e72b:0xa0
skipped der 0xa0, next byte 0x02
skipped der 0x02, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
skipped der 0x30, next byte 0x30
entered der @0x8f7e830:0x30 len:418 inner_byte @0x8f7e834:0x30
skipped der 0x30, next byte 0x03
entered der @0x8f7e843:0x03 len:399 inner_byte @0x8f7e847:0x00
copying key bytes:399, first:0x00
insize:4397 tail:9
got block len:4
got SERVER_HELLO_DONE

Now need to teach it to send ClientKeyExchange...

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-14 13:57:16 +01:00
Denys Vlasenko
ceff6b0ea9 tls: work-in-progress TLS1.2 test applet
function                                             old     new   delta
tls_main                                               -     733    +733
dump                                                   -     230    +230
xread_tls_block                                        -     180    +180
get_der_len                                            -      76     +76
enter_der_item                                         -      70     +70
skip_der_item                                          -      56     +56
get24be                                                -      24     +24
tls_error_die                                          -      19     +19
packed_usage                                       31010   31027     +17
applet_names                                        2549    2553      +4
applet_main                                         1472    1476      +4
applet_suid                                           92      93      +1
applet_install_loc                                   184     185      +1
------------------------------------------------------------------------------
(add/remove: 9/0 grow/shrink: 5/0 up/down: 1415/0)           Total: 1415 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-14 12:49:32 +01:00
Denys Vlasenko
a6f8651911 wget: fix for brain-damaged HTTP servers. Closes 9471
write(3, "GET / HTTP/1.1\r\nUser-Agent: Wget\r\nConnection: close\r\n\r\n", 74) = 74
shutdown(3, SHUT_WR)    = 0
alarm(900)              = 900
read(3, "", 1024)       = 0
write(2, "wget: error getting response\n", 29) = 29
exit(1)

The peer simply does not return anything. It closes its connection.

Probably it detects wget closing its writing end: shutdown(3, SHUT_WR).

The point it, closing write side of the socket is _valid_ for HTTP.
wget sent the full request, it won't be sending anything more:
it will only receive the response, and that's it.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 20:16:45 +01:00
Denys Vlasenko
098b713c7b ash: commented-out possible fix for 7694
bash has a feature: it restores termios after a successful wait for
a foreground job which had at least one stopped or sigkilled member.
The probable rationale is that SIGSTOP and SIGKILL can preclude task from
properly restoring tty state. Should we do this too?
A reproducer: ^Z an interactive python:

$ python
Python 2.7.12 (...)
>>> ^Z
    { python leaves tty in -icanon -echo state. We do survive that... }
 [1]+  Stopped                    python
    { ...however, next program (python no.2) does not survive it well: }
$ python
Python 2.7.12 (...)
>>> Traceback (most recent call last):
    { above, I typed "qwerty<CR>", but -echo state is still in effect }
  File "<stdin>", line 1, in <module>
NameError: name 'qwerty' is not defined

The implementation is modeled on bash code and seems to work.
However, I'm not sure we should do this. For one: what if I'd fg
the stopped python instead? It'll be confused by "restored" tty state.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 19:59:03 +01:00
Denys Vlasenko
4c179373e0 ash: 16-bit ->nprocs field is a pain for many CPUs
function                                             old     new   delta
getoptscmd                                           527     540     +13
getjob                                               280     286      +6
makejob                                              278     282      +4
forkchild                                            602     600      -2
waitcmd                                              208     205      -3
showjob                                              382     379      -3
getstatus                                             83      80      -3
dowait                                               408     405      -3
freejob                                               93      89      -4
fg_bgcmd                                             290     286      -4
forkshell                                            260     255      -5
killcmd                                              224     218      -6
jobno                                                 17      11      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/10 up/down: 23/-39)           Total: -16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 18:44:15 +01:00
Denys Vlasenko
ed15dde60a Move FEATURE_AUTOWIDTH config option to two applets which use it
No code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 16:35:52 +01:00
Denys Vlasenko
6c1f348fa7 Move FEATURE_USE_TERMIOS config option to two applets which use it
No code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 16:27:12 +01:00
Denys Vlasenko
01ccdd1d3c libbb: consolidate the code to set termios unbuffered mode
function                                             old     new   delta
set_termios_to_raw                                     -     116    +116
count_lines                                           72      74      +2
powertop_main                                       1458    1430     -28
top_main                                             943     914     -29
more_main                                            759     714     -45
fsck_minix_main                                     2969    2921     -48
conspy_main                                         1197    1135     -62
rawmode                                               99      36     -63
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/6 up/down: 118/-275)         Total: -157 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 16:17:59 +01:00
Denys Vlasenko
8944c67b1f hush: reinstate [[ builtin
Mike deleted it:

    commit 39456a18a1
    Author: Mike Frysinger <vapier@gentoo.org>
    Date:   Sat Mar 28 12:21:57 2009 +0000

    stop lying about [[ test support

probably because it was not properly ifdefed around, and was enabled
even when bash compat is off.

I just tested it - it works:

$ [ *.diff = z.diff ]; echo $?
0
$ [[ *.diff = z.diff ]]; echo $?
1

Of course, not all numerous bash tricks of [[ ]] are implemented...

function                                             old     new   delta
bltins2                                               60      72     +12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 14:22:00 +01:00
Kang-Che Sung
027d3ab57d hush: split bash compatible extensions into separate defines. No code changes
Splitting these options makes it self-documenting about what
bash-compatible features we have.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 14:18:30 +01:00
Denys Vlasenko
7d4aec0c3e ash: split bash compatible extensions into separate defines. No code changes
Splitting these options makes it self-documenting about what
bash-compatible features we have.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 14:00:38 +01:00
Denys Vlasenko
a8a075acfe busybox: stop depending on FEATURE_AUTOWIDTH for applet list
Many other appletw don't - they unconditionally use get_terminal_wodth(),
and here the amount of code saved by FEATURE_AUTOWIDTH=n is tiny.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 10:52:24 +01:00
Denys Vlasenko
0fd9fb4244 top: FEATURE_USE_TERMIOS shouldn't control reading of screen size
It controls whether we take input.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 10:50:08 +01:00
Denys Vlasenko
c5891fe1af more: hardcode FEATURE_USE_TERMIOS=y in this applet; code shrink
function                                             old     new   delta
get_wh                                                 -      27     +27
tcsetattr_tty_TCSANOW                                  -      18     +18
gotsig                                                35      27      -8
more_main                                            835     759     -76
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/2 up/down: 45/-84)            Total: -39 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-11 10:38:52 +01:00
Denys Vlasenko
80f806cac9 hush: shorten output of "help" builtin
text	   data	    bss	    dec	    hex	filename
 891272	    485	   6856	 898613	  db635	busybox_old
 891232	    485	   6856	 898573	  db60d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 16:51:10 +01:00
Denys Vlasenko
a1184af5f8 hush: reorder builtins (cd and pwd ought to be close, etc), no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 15:58:02 +01:00
Denys Vlasenko
f35ad3bd12 init: rename FEATURE_EXTRA_QUIET -> FEATURE_INIT_QUIET
The former name had no INIT anywhere in its name, sounded generic

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 15:24:13 +01:00
Denys Vlasenko
2b4c258e74 ash: revert "make dot command search current directory first"
Reverts this:
    commit 8ad78e1ec7
    Author: Denis Vlasenko <vda.linux@googlemail.com>
    Date:   Sun Feb 15 12:40:30 2009 +0000
    ash: make dot command search current directory first, as bash does.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 15:18:38 +01:00
Denys Vlasenko
265062d59d shells: make hush test optional, rename ASH_BUILTIN_foo -> ASH_foo
This makes hash and ash more symmetrical wrt config menu and config
options.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 15:13:30 +01:00
Denys Vlasenko
f560422fa0 Big cleanup in config help and description
Redundant help texts (one which only repeats the description)
are deleted.

Descriptions and help texts are trimmed.

Some config options are moved, even across menus.

No config option _names_ are changed.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-10 14:58:54 +01:00
Kang-Che Sung
f10f7a21d4 Allow FAST_FUNC to be overridden at build time
Busybox uses FAST_FUNC macro to tweak with IA-32 calling conventions in
order to make the function call slightly smaller or slightly faster.
However, when I experiment with GCC's LTO (Link Time Optimization), I
discovered that FAST_FUNC could hinder LTO's optimization so that the
resulting executable become a few bytes larger (than what is compiled
without FAST_FUNC).

This change allows to specify e.g.
	CONFIG_EXTRA_CFLAGS="-DFAST_FUNC= -flto"
and compile with LTO without a source code hack.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 18:52:32 +01:00
Kang-Che Sung
61a91af63d kill: optimizations for single-applet build
* Fix a bug with a configuration in which the shell's kill builtin
  would be mistreated as a killall command (i.e. '-q' works, and
  'kill process_name' succeeds when it shouldn't):

    CONFIG_ASH_JOB_CONTROL=y
    CONFIG_HUSH_KILL=y
    # CONFIG_KILL is not set
    CONFIG_KILLALL=y
    # CONFIG_KILLALL5 is not set

* Optimize out unneeded code when the relevant applets are not
  selected.

* Move kbuild lines about shells' kill builtins from Kbuild.src to
  kill.c, to accompany the new HAVE_SH_KILL macro. I hope this would
  make maintanence a little bit easier.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 18:46:58 +01:00
Denys Vlasenko
1cc6804f69 hush: make echo builtin optional
It's a bit overkill (who would want it off?) but ash already has it
configurable. Let's be symmetric.

Also tweak kbuild logic to use ASH_BUILTIN_ECHO to select echo.o,
not ASH.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 17:10:04 +01:00
Kang-Che Sung
53487a8d22 kill: need not build kill.c when ash's job control is off
ash kill builtin depends on the job control config option.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 17:02:51 +01:00
Denys Vlasenko
e7b54d0fcc make_single_applets.sh: show errors and warnings
While at it, fix one warning in modprobe-small.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 16:31:21 +01:00
Denys Vlasenko
590402bb55 unlzma: expand comments, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 14:28:25 +01:00
Denys Vlasenko
3989e5adf4 unlzma: fix erroneous "while" instead of "if". Closes 4682
These parts of the code essentially check whether
stepping back by rep0 goes negative or not.

LZMA SDK from lzma1604.7z has the following in the corresponding places:

... = dic[dicPos - rep0 + (dicPos < rep0 ? dicBufSize : 0)]

Clearly, not loop here.

Technically, "while" here works: if condition is false (because pos
underflowed), it iterates once, adds header.dict_size (a.k.a. dicBufSize),
this makes pos positive but smaller than header.dict_size, and loop exits.

Now we'll just check for negative result of subtraction, which is less code:

function                                             old     new   delta
unpack_lzma_stream                                  2659    2641     -18

(I hope 2 Gbyte+ dictionaries won't be in use soon).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 14:02:55 +01:00
Denys Vlasenko
8c1d857d25 unzip: match "Defl:?" display with info-zip; cosmetic code shuffling
Large nested indented code blocks made more sane with a few gotos.

function                                             old     new   delta
unzip_main                                          2491    2519     +28

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 13:10:10 +01:00
Denys Vlasenko
6b4f4b5284 unzip: optional support for xz
function                                             old     new   delta
unzip_main                                          2476    2491     +15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 11:12:01 +01:00
Denys Vlasenko
2a0867a5ed unzip: optional support for bzip2 and lzma
function                                             old     new   delta
unzip_main                                          2376    2476    +100
bbunpack                                             750     745      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 10:58:37 +01:00
Denys Vlasenko
6bf52b615d modprobe-small: build fixes
Was throwing some build errors:

CONFIG_MODPROBE_SMALL=y
CONFIG_DEPMOD=y
CONFIG_LSMOD=y
CONFIG_MODINFO=y
CONFIG_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED=y

error: unused variable 'exitcode'

modutils/modprobe-small.c: In function 'modprobe_main':
modutils/modprobe-small.c:1060: error: control reaches end of non-void function

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 09:48:58 +01:00
Explorer09
80172e4622 modprobe-small: optimizations for single applet build
(I'm requesting for a review first because I fear such an aggressive
change could lead to bugs. While I observe the sizes have reduced, I
haven't test the functionality of each applet after that. So please
test before merging.)

Aggressively cut off unneeded code when the relevant applets are not
built.

Correct dependencies of FEATURE_MODPROBE_SMALL_OPTIONS_ON_CMDLINE and
FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED.

Don't bother with the '-r' option check if only rmmod is built (assume
true then), or when neither rmmod or mobprobe is built (assume false
then).

Size comparison before and after the change (single applet
configuration):

     text    data     bss     dec     hex filename
    34778     946     112   35836    8bfc old/busybox_DEPMOD
    34151     946     112   35209    8989 new/busybox_DEPMOD

    34903     946     112   35961    8c79 old/busybox_INSMOD
    28316     778     112   29206    7216 new/busybox_INSMOD

    35228     962     112   36302    8dce old/busybox_LSMOD
     5011     706      40    5757    167d new/busybox_LSMOD

    34830     946     112   35888    8c30 old/busybox_MODPROBE
    34795     946     112   35853    8c0d new/busybox_MODPROBE

    34718     946     112   35776    8bc0 old/busybox_RMMOD
     7502     714     104    8320    2080 new/busybox_RMMOD

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 09:31:17 +01:00
Kang-Che Sung
b130f9f758 Allow 'gzip -d' and 'bzip2 -d' without gunzip or bunzip2
Idea copied from the "ip" applet.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 09:03:31 +01:00
Denys Vlasenko
fb87d93d1e ash: fix a bug in argv restoration after sourcing a file
if sourced file "shift"ed argvs so that $1 is NULL, restore wasn't done.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 08:22:06 +01:00
Denys Vlasenko
2b1559056c hush: fix a bug in argv restoration after sourcing a file
if sourced file "shift"ed argvs so that $1 is NULL, restore wasn't done.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 08:13:21 +01:00
Denys Vlasenko
4e4f88e569 hush: global_args_malloced is used only if set builtin is enabled
function                                             old     new   delta
run_pipe                                            1623    1635     +12
builtin_source                                       210     222     +12
save_and_replace_G_args                               70      60     -10
builtin_shift                                        132      94     -38
restore_G_args                                        98       -     -98
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 2/2 up/down: 24/-146)          Total: -122 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 07:57:38 +01:00
Denys Vlasenko
cc2fd5a986 hush: fix 'defined but not used' warning
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 06:19:55 +01:00
Denys Vlasenko
5362cc4b8c hush: remove redundand test for ENABLE_HUSH_JOB
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 05:57:13 +01:00
Denys Vlasenko
fd68f1e80d hush: fix kill builtin without jobs support
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 05:47:57 +01:00
Denys Vlasenko
442a414d66 typo fix
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-09 05:11:09 +01:00
Denys Vlasenko
41ade05cac hush: conditionalize print_escaped() on EXPORT || TRAP
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08 18:56:24 +01:00
Denys Vlasenko
4471969db2 hush: make memleak builtin optional
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-01-08 18:44:41 +01:00