Commit Graph

14930 Commits

Author SHA1 Message Date
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
7f9d62d7f5 tweak NOFORK_NOEXEC.lst
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 16:01:39 +02:00
Denys Vlasenko
f8cdc7a2bc ash: BASH_XTRACEFD bashism
Based on patch by Johannes Schindelin <johannes.schindelin@gmx.de>

function                                             old     new   delta
evalcommand                                         1447    1500     +53

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 15:24:49 +02:00
Johannes Schindelin
7344755823 ash: remove no-longer-used variable
As of 035486c75 (ash: significant overhaul of redirect saving logic,
2017-07-31), the sv_pos variable is no longer used (just assigned to,
with no further effect).

Let's just remove it.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 14:52:08 +02:00
Denys Vlasenko
d329e34c96 ash: INT_OFF/INT_ON around run_nofork_applet()
function                                             old     new   delta
evalcommand                                         1441    1447      +6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 14:50:03 +02:00
Denys Vlasenko
49e6bf2db9 sheel: improve comments on signal handling
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 14:28:16 +02:00
Denys Vlasenko
3346b4afc5 modutils: make them NOEXEC except depmod
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 02:56:39 +02:00
Denys Vlasenko
4dc86699b5 microcom: require exactly one non-option
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-04 02:01:45 +02:00
Denys Vlasenko
cfd392bea9 ash: add a fixme comment at run_nofork_applet
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 19:56:29 +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
72d725d7cc getopt: make it NOEXEC
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 19:30:21 +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
663ae52676 config: FEDORA_COMPAT option (so far only tweaks uname)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 03:46:14 +02:00
Denys Vlasenko
819b47aa35 new NOFORKs: clear, nproc, tty, uname, arch, unlink, which
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-03 03:29:32 +02:00
Denys Vlasenko
39701204cf hush: do not accept "if() { echo; }" function def
function                                             old     new   delta
parse_stream                                        2634    2692     +58
msg_and_die_if_script                                  -      21     +21
syntax_error_unexpected_ch                            41      46      +5
syntax_error_at                                       14      18      +4
die_if_script                                         31      28      -3
setup_redirects                                      319     308     -11
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/2 up/down: 88/-14)             Total: 74 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 19:46:14 +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
dd4b446f76 hush: make SIGINT handling visually less confusing
$ echo $$
18448
$ echo $? <wait here, run "kill -INT 18448" in other shell><press enter>
   <=== NOTHING??
$

That empty line does not look right. After this patch:

$ echo $$
18448
$ echo $? <wait here, run "kill -INT 18448" in other shell><press enter>
^C
$

function                                             old     new   delta
fgetc_interactive                                    245     246      +1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 16:52:12 +02:00
Denys Vlasenko
7c40ddd950 NOFORK fixes
"rm -i FILE" and "yes" can now be interrupted by ^C in hush.
This also now works:

$ usleep 19999999
^C
$ echo $?
130

function                                             old     new   delta
run_pipe                                            1668    1711     +43
pseudo_exec_argv                                     312     321      +9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 52/0)               Total: 52 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 16:37:39 +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
Denys Vlasenko
18e781dc02 config: do not use `a' quoting in help texts
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 14:12:48 +02:00
Denys Vlasenko
ec05df13b0 ash: align --login code with dash
Upstream commit:

    Date: Sun, 13 Jul 2008 22:34:50 +0800
    [OPTIONS] Added support for -l

    This patch adds support for the -l option (login shell) as required
    by the LSB.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

It's a bit bigger, but gets rid of one global variable

function                                             old     new   delta
options                                              554     576     +22

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 19:43:47 +02:00
Denys Vlasenko
78b1b1b07a test: fix 4-argument case
Upstream dash commit:

    Date: Sun, 13 Jul 2008 19:20:10 +0800
    Fixed 3,4-argument cases for test per POSIX

    ----- Forwarded message from Gerrit Pape <pape@smarden.org> -----

    Subject: Bug#455828: dash: 4-argument test "test \( ! -e \)" yields an error
    Date: Fri, 28 Dec 2007 08:53:29 +0000
    From: Gerrit Pape <pape@smarden.org>
    To: Vincent Lefevre <vincent@vinc17.org>, 455828@bugs.debian.org

    On Thu, Dec 27, 2007 at 06:23:20PM +0100, Vincent Lefevre wrote:
    > On 2007-12-27 16:00:06 +0000, Gerrit Pape wrote:
    > > On Wed, Dec 12, 2007 at 02:18:47AM +0100, Vincent Lefevre wrote:
    > > > According to POSIX[*], "test \( ! -e \)" is a 4-argument test and is
    > > > here equivalent to "test ! -e". But dash (like ksh93 and bash) yields
    > > > an error:
    > > >
    > > > $ test \( ! -e \) || echo $?
    > > > test: 1: closing paren expected
    > > > 2
    > > > $ test ! -e || echo $?
    > > > 1
    > >
    > > Hi Vincent,
    > >
    > > the -e switch to test takes an argument, a pathname.
    >
    > According to POSIX, in both above examples, "-e" is *not* a switch,
    > just a string.
    >
    >   test \( ! -e \)
    >
    > means: return true if the string "-e" is empty, otherwhise return false.
    > The error in dash is that it incorrectly thinks that "-e" is a switch in
    > this context.

    I see, you're right.  Thanks, Gerrit.

    ----- End forwarded message -----

    This patch hard-codes the 3,4-argument cases in the way required by
    POSIX.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

function                                             old     new   delta
test_main                                            370     421     +51

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 19:21:51 +02:00
Denys Vlasenko
cee603d921 hush: remove redundant "G_flag_return_in_progress = -1"
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 18:06:07 +02:00
Denys Vlasenko
5b3d2eb327 hush: fix "true | func_with_return" not allowing return.
function                                             old     new   delta
pseudo_exec_argv                                     305     312      +7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 18:02:28 +02:00
Denys Vlasenko
d0fff9155b ash: fix display of ">&-" redirect in job strings
function                                             old     new   delta
cmdtxt                                               558     569     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 14:32:18 +02:00
Denys Vlasenko
75481d3634 hush: functions have priority over builtins (!)
function                                             old     new   delta
pseudo_exec_argv                                     291     305     +14
run_pipe                                            1560    1555      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 14/-5)               Total: 9 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 05:27:09 +02:00
Denys Vlasenko
bf1c344dfd hush: if STANDALONE, close interactive fd for NOEXECed children
function                                             old     new   delta
pseudo_exec_argv                                     291     305     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 04:54:53 +02:00
Denys Vlasenko
32fdf2f9fc ash,hush: ">&10" redirects to script/tty fds should not work
The fact that shell has open fds to tty and/or scripts should be
unobservable, if possible. In particular, if redirect tries to dup
one of them via ">&script_fd", it's better to pretend that script_fd
is closed, and thus redirect fails with EBADF.

Fixes these two testcase failures:
ash-redir/redir_to_bad_fd.tests
hush-redir/redir_to_bad_fd3.tests

function                                             old     new   delta
redirect                                            1018    1129    +111
setup_redirects                                      250     359    +109
readtoken1                                          2651    2655      +4
cmdloop                                              185     187      +2
changepath                                           194     195      +1
save_fd_on_redirect                                  203     194      -9
evaltree                                             501     484     -17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/2 up/down: 227/-26)           Total: 201 bytes
   text    data     bss     dec     hex filename
 914553     485    6848  921886   e111e busybox_old
 914754     485    6848  922087   e11e7 busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 04:35:18 +02:00
Denys Vlasenko
035486c750 ash: significant overhaul of redirect saving logic
New code is similar to what hush is doing.
Make CLOSED to -1: same as dash.
popredir() loses "restore" parameter: same as dash.
COPYFD_RESTORE bit is no longer necessary.

This change fixes this interactive bug:

	$ ls -l /proc/$$/fd 10>&-
	ash: can't set tty process group: Bad file descriptor
	ash: can't set tty process group: Bad file descriptor
	[1]+  Done(2)                    ls -l /proc/${\$}/fd 10>&4294967295

function                                             old     new   delta
unwindredir                                           29      27      -2
tryexec                                              154     152      -2
evaltree                                             503     501      -2
evalcommand                                         1369    1367      -2
cmdloop                                              187     185      -2
redirect                                            1029    1018     -11
popredir                                             153     123     -30
need_to_remember                                      36       -     -36
is_hidden_fd                                          68       -     -68
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/7 up/down: 0/-155)           Total: -155 bytes
   text    data     bss     dec     hex filename
 914572     485    6848  921905   e1131 busybox_old
 914553     485    6848  921886   e111e busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 04:21:46 +02:00
Denys Vlasenko
657e9005a9 hush: massage redirect code to be slightly more like ash
function                                             old     new   delta
save_fd_on_redirect                                    -     203    +203
xdup_CLOEXEC_and_close                                 -      75     +75
setup_redirects                                      245     250      +5
xdup_and_close                                        72       -     -72
save_fds_on_redirect                                 221       -    -221
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 1/0 up/down: 283/-293)          Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 04:08:09 +02:00
Denys Vlasenko
d07a15bd1b ash: remove REDIR_SAVEFD2
function                                             old     new   delta
evalcommand                                         1364    1369      +5
redirect                                            1055    1014     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 5/-41)             Total: -36 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-31 04:05:51 +02:00
Denys Vlasenko
5f0a75f24b ash: if !ENABLE_ASH_EXPAND_PRMT, disable PSSYNTAX code
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 22:58:44 +02:00
Denys Vlasenko
1c79aeb6a8 ash: [REDIR] Fix popredir on abnormal exit from built-in
Upstream commit:

    Date: Thu, 27 May 2010 15:03:46 +0800
    [REDIR] Fix popredir on abnormal exit from built-in

    Just like the poplocalvar problem recently fixed, redirections
    can also be leaked in case of an abnormal exit.  This patch fixes
    it using the same method as poplocalvar, by storing the previous
    redirection state and restoring to that point.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 22:51:52 +02:00
Denys Vlasenko
469998015f ash: [PARSER] Add FAKEEOFMARK for expandstr
Upstream commit:

    Date: Thu, 27 Dec 2007 13:54:16 +1100
    [PARSER] Add FAKEEOFMARK for expandstr

    Previously expandstr used the string "" to indicate that it needs to be
    treated just like a here-doc except that there is no terminator.  However,
    the string "" is in fact a valid here-doc terminator so now that we deal
    with it correctly expandstr no longer works in the presence of new-lines
    in the prompt.

    This patch introduces the FAKEEOFMARK macro which does not equal any
    real EOF marker but is distinct from the NULL pointer which is used to
    indicate non-here-doc contexts.

    Thanks to Markus Triska for reporting this regression.

    Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Unfortunately, I did not find the failing example for this old fix.

I also tweaked the code which was added by this commit:
"
Date: Mon Sep 24 18:30:02 2007 +0000
ash: fix prompt expansion (Natanael Copa <natanael.copa@gmail.com>)
"
since other parts of code do expect expandstr() to use DQSYNTAX, not PSSYNTAX.

function                                             old     new   delta
parse_stream                                        2609    2634     +25
setprompt_if                                         128     133      +5
read_profile                                          32      37      +5
evalcommand                                         1334    1339      +5
expandstr                                            122     120      -2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/1 up/down: 40/-2)              Total: 38 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 21:12:29 +02:00
Denys Vlasenko
0f018b3070 hush: fix handling of empty heredoc EOF marker
function                                             old     new   delta
parse_stream                                        2609    2634     +25

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 20:43:26 +02:00
Denys Vlasenko
a732898fdd ash: [PARSER] Removed noexpand/length check on eofmark
Upstream comment:

	Date: Sun, 11 Nov 2007 14:21:23 +0800
	[PARSER] Removed noexpand/length check on eofmark

	On Tue, Oct 30, 2007 at 04:23:35AM +0000, Oleg Verych wrote:
	>
	> } 8<<""
	> ======================

	Actually this (the empty delim) only works with dash by accident.
	I've tried bash and pdksh and they both terminate on the first
	empty line which is what you would expect rather than EOF.  The
	real Korn shell does something completely different.

	I've fixed this in dash to conform to bash/pdksh.

	> In [0] it's stated, that delimiter isn't evaluated (expanded), only
	> quoiting must be checked. That if() seems to be completely bogus.

	OK I agree.  The reason it was there is because the parser would
	have already replaced the dollar sign by an internal representation.

	I've fixed it properly with this patch.

	Test case:

	        cat <<- $a
	                OK
	        $a

	        cat <<- ""
	                OK

	        echo OK

	Old result:

	        dash: Syntax error: Illegal eof marker for << redirection
	        OK

	        echo OK

	New result:

	        OK
	        OK
	        OK

function                                             old     new   delta
parsefname                                           227     152     -75
readtoken1                                          2819    2651    -168
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-243)           Total: -243 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 19:57:28 +02:00
Denys Vlasenko
170f93ef1b ash: "Undo all redirections" comment is wrong, delete it
No code changes.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 18:54:53 +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
69be994de6 ps: tweak outdated comment, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 02:27:12 +02:00
Denys Vlasenko
5d725fd627 ps: implement -o sid
function                                             old     new   delta
func_sid                                               -      29     +29
out_spec                                             320     340     +20
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 49/0)               Total: 49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 02:20:17 +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
00a1dbd230 ash: make tryexec(cmd) parameter const char
Fewer casts this way.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-29 01:20:53 +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
Ron Yorston
be366e5afa ash: support platforms that don't have '%m' printf specifier
The '%m' conversion specifier prints an error message based on the
current value of 'errno'.  It is available in the GNU C library,
Cygwin (since 2012), uClibc and musl.

It is not available in various BSDs, BSD-derived systems (MacOS,
Android) or Microsoft Windows.

Use a symbol defined in platform.h to control how error messages
can be formatted to display the 'errno' message.  On platforms that
support it use '%m'; on other platforms use '%s' and strerror().

On platforms that have '%m' there is essentially no change in the
size of the binary.  Otherwise:

function                                             old     new   delta
redirect                                            1287    1310     +23
xtcsetpgrp                                            27      44     +17
dup2_or_raise                                         34      51     +17
setinputfile                                         267     275      +8
.rodata                                           163379  163371      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/1 up/down: 65/-8)              Total: 57 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-28 15:39:26 +02:00
Denys Vlasenko
619d9b5e68 ash: less hackish implementation of evaltreenr()
Defining a function alias with __attribute__ ((alias("evaltree"),__noreturn__))
is not that usual, and clang had a bug which made it misunderstand
this construct.

Switch to:
ALWAYS_INLINE NORETURN evaltreenr() { evaltree(); unreachable(); }

Older gcc's do not know unreachable(), on them we pay the price of having
a few extra calls to abort():

function                                             old     new   delta
evalsubshell                                         151     156      +5
evalpipe                                             357     362      +5
argstr                                              1141    1144      +3

On newer gcc, code size does not change.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-28 15:28:33 +02:00
Natanael Copa
46f3f16b58 unzip: fix regression on big-endian machines
This fixes a regression which was introduced with commit 2a0867a5
("unzip: optional support for bzip2 and lzma") and causes unzip to exit
with error when extracting archives:

  unzip: unsupported method 2048

Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27 15:38:55 +02:00
Denys Vlasenko
5b3cbe3a53 config: more tweaking of help texts
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27 14:45:25 +02:00
Denys Vlasenko
e9a5a6985c rdate: tweak comments, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27 14:31:59 +02:00
Denys Vlasenko
1d8df52d45 inetd: improve --helpt text and config help text.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27 13:34:51 +02:00
Denys Vlasenko
2e01eec4d3 tweak examples/var_service/*
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-07-27 12:53:20 +02:00