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843 Commits

Author SHA1 Message Date
Denys Vlasenko
2ed74e25d3 hush: make "wait %1" work even if the job is dead 
Example script:

	sleep 1 | (sleep 1;exit 3) &
	sleep 2
	echo Zero:$?
	wait %1
	echo Three:$?

function                                             old     new   delta
clean_up_last_dead_job                                 -      24     +24
process_wait_result                                  426     447     +21
builtin_wait                                         285     293      +8
insert_job_into_table                                264     269      +5
builtin_jobs                                          68      73      +5
remove_job_from_table                                 59      57      -2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/1 up/down: 63/-2)              Total: 61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-14 19:58:46 +02:00
Denys Vlasenko
0c5657e911 hush: remove superfluous comparison 
function                                             old     new   delta
builtin_wait                                         291     285      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-14 19:27:03 +02:00
Denys Vlasenko
9fda609a60 hush: add support for "set -e" 
function                                             old     new   delta
run_list                                             978    1046     +68
o_opt_strings                                         24      32      +8
reset_traps_to_defaults                              136     142      +6
pick_sighandler                                       57      60      +3
packed_usage                                       31772   31770      -2
hush_main                                            983     961     -22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/2 up/down: 85/-24)             Total: 61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-14 13:36:48 +02:00
Denys Vlasenko
b057806a6a hush: add TODO for "set -e" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-10 10:33:27 +02:00
Denys Vlasenko
9e55a156f8 hush: simplify insert_job_into_table() a bit 
function                                             old     new   delta
done_word                                            767     761      -6
insert_job_into_table                                325     264     -61
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 59/-126)           Total: -67 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-10 10:01:12 +02:00
Denys Vlasenko
1609629a91 hush: rename a few functions 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-10 10:00:28 +02:00
Denys Vlasenko
13102634bb hush: explain why wait5.tests is failing 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-08 00:24:32 +02:00
Denys Vlasenko
840a4355d0 hush: fix "(sleep 1; exit 3) & sleep 2; echo $?; wait $!; echo $?" 
function                                             old     new   delta
process_wait_result                                  414     426     +12
builtin_wait                                         283     291      +8
run_list                                             974     978      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 24/0)               Total: 24 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-07 22:56:02 +02:00
Denys Vlasenko
2db74610cd hush: fix two redirection testcase failures 
function                                             old     new   delta
save_fds_on_redirect                                 183     256     +73
fcntl_F_DUPFD                                          -      46     +46
restore_redirects                                     74      96     +22
xdup_and_close                                        51      72     +21
setup_redirects                                      196     200      +4
hush_main                                            988     983      -5
static.C                                              12       -     -12
run_pipe                                            1595    1551     -44
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 4/2 up/down: 166/-61)           Total: 105 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-07 22:07:28 +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
50b8b2914b hush: add a TODO about redir3.tests failure 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-06 20:57:37 +02:00
Denys Vlasenko
e59591a364 hush: Print error messages on shift -1 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-06 20:12:44 +02:00
Denys Vlasenko
5dad7bdc3b hush: implement negative start in the ${v: -n[:m]} idiom 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-06 19:48:20 +02:00
Denys Vlasenko
7456298472 hush: "adopt" ash signal4.tests 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-06 18:40:45 +02:00
Denys Vlasenko
637982f5bb hush: correctly handle quoting in "case" even if !BASH_PATTERN_SUBST 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-06 01:52:23 +02:00
Denys Vlasenko
bd43c6784f hush: fix quoted_punct.tests failure 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-05 23:12:15 +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
2e989ef232 msh: delete this applet 
It's deprecated since 2009 and interferes with make_single_applets.sh tests.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-03 16:56:37 +02:00
Denys Vlasenko
4ee824f6ba randomconfig fixes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-03 01:22:13 +02:00
Denys Vlasenko
f547041940 ash,hush: fix SIGCHLD interrupting read builtin 
function                                             old     new   delta
readcmd                                              169     217     +48
shell_builtin_read                                  1087    1097     +10
localcmd                                             366     364      -2
builtin_read                                         197     193      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 58/-6)              Total: 52 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-05-22 19:34:45 +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
205d48e948 *: add comment about APPLET_ODDNAME format 
It confused me more than once

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-29 14:57:33 +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
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
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
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
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
Denys Vlasenko
6ec76d8719 hush: make export builtin optional 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-08 18:40:41 +01:00
Denys Vlasenko
d5933b1125 hush: make umask builtin optional 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-08 18:31:39 +01:00
Denys Vlasenko
10d5ece64a hush: make set/unset builtins optional 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-08 18:28:43 +01:00
Denys Vlasenko
7a85c60e7e hush: make read and trap builtins optional 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-08 17:40:18 +01:00
Denys Vlasenko
1125d7d680 hush: kill builtin and kill %jobspec support 
Also made it and printf, type and wait builtins optional.

function                                             old     new   delta
builtin_kill                                           -     323    +323
bltins1                                              336     348     +12
builtin_type                                         114     116      +2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 337/0)             Total: 337 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-08 17:19:38 +01:00
Denys Vlasenko
d5b5c2fa15 hush: support %%, %+ and % jobspec (meaning "current job") 
function                                             old     new   delta
parse_jobspec                                         83     133     +50
builtin_wait                                         278     283      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-08 15:46:04 +01:00
Denys Vlasenko
b05bcaf29c hush: correct exitcode for unterminated ')' - exitcode2.tests testcase 
function                                             old     new   delta
parse_stream                                        2595    2609     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-01-03 11:47:50 +01:00
Denys Vlasenko
0b8835861b Make it possible to select "sh" and "bash" aliases without selecting ash or hush 
The same can be done for msh, but we are probably better off just deleting it
in a next versio or two.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-12-23 16:56:43 +01:00
Denys Vlasenko
6704746c69 shell: move "config" blocks above their use in coditional includes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-12-22 15:21:58 +01:00
Denys Vlasenko
b6afcc7819 shell: suppress "unused var/func" warnings on some configs 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-12-12 16:30:20 +01:00
Denys Vlasenko
4b89d512b1 ash,hush: make ^C in interactive mode visually much closer to bash behavior 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-25 03:41:03 +01:00
Denys Vlasenko
8660aeb312 ash,hush: ^C from command line should set $? to 128+SIGINT 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-24 17:44:02 +01:00
Denys Vlasenko
87e039d016 hush: make getch/peek functions directly called 
Indirect calls are more difficult to predict.
Unfortunately, on x64 direct call is 5 bytes while indirect "call (reg+ofs)"
is 3 bytes:

function                                             old     new   delta
i_getch                                                -      82     +82
i_peek                                                 -      63     +63
parse_stream                                        2531    2579     +48
parse_dollar                                         771     797     +26
parse_redirect                                       296     321     +25
add_till_closing_bracket                             408     420     +12
encode_string                                        256     265      +9
i_peek_and_eat_bkslash_nl                             93      99      +6
add_till_backquote                                   110     114      +4
parse_and_run_stream                                 139     141      +2
expand_vars_to_list                                 1143    1144      +1
static_peek                                            6       -      -6
setup_string_in_str                                   39      18     -21
setup_file_in_str                                     40      19     -21
static_get                                            27       -     -27
file_peek                                             52       -     -52
file_get                                              65       -     -65
------------------------------------------------------------------------------
(add/remove: 2/4 grow/shrink: 9/2 up/down: 278/-192)           Total: 86 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 22:35:05 +01:00
Denys Vlasenko
00a06b9715 hush: renumber PIPE_foo, make PIPE_SEQ = 0 
PIPE_SEQ is used most often, having it zero makes code smaller:

function                                             old     new   delta
done_word                                            719     707     -12
parse_stream                                        2546    2531     -15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 20:35:53 +01:00
Denys Vlasenko
6c635d62d4 hush: small optimization in run_list 
I thought gcc can detect this itself. It doesn't.

function                                             old     new   delta
run_list                                            1030    1021      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 20:26:11 +01:00
Denys Vlasenko
5cc9bf6a21 hush: deindent large block of code, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 17:34:44 +01:00
Denys Vlasenko
1eada9ad8d hush: simplify insert_bg_jobs 
function                                             old     new   delta
insert_bg_job                                        366     281     -85

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 17:28:45 +01:00
Denys Vlasenko
830ea35484 hush: make "wait %1" less likely to play with signal mask 
Was playing with "sleep 3 | exit 3 & wait %1" and noticed that often
SIGCHLD arrives even before I get to signal masking. Can avoid it in this
case.

function                                             old     new   delta
wait_for_child_or_signal                             228     265     +37

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 04:59:11 +01:00
Denys Vlasenko
02affb4afd hush: rework "wait %jobspec" to work in non-interactive shells too 
Also add tests. wait5.tests so far fails (but works for ash and dash).

function                                             old     new   delta
builtin_wait                                         305     283     -22

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-08 00:59:29 +01:00
Denys Vlasenko
26ad94bedc hush: "wait $!; echo $?" should return 127 if $! already exited 
It would be nice to provide bash-like "remember las exitcode"
thingy, but it's a bit complex. For now, match ash and dash.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-07 23:07:21 +01:00
Denys Vlasenko
62b717b75e hush: implement "wait %jobspec" 
function                                             old     new   delta
parse_jobspec                                          -      83     +83
job_exited_or_stopped                                  -      79     +79
builtin_wait                                         236     302     +66
wait_for_child_or_signal                             199     228     +29
checkjobs                                            142     158     +16
builtin_jobs                                          59      68      +9
process_wait_result                                  453     408     -45
builtin_fg_bg                                        272     203     -69
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 4/2 up/down: 282/-114)          Total: 168 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-07 22:12:18 +01:00
Denys Vlasenko
4e1c8b4f6a hush: factor out %jobspec parsing 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-07 20:06:40 +01:00
Denys Vlasenko
5d5a611df2 hush: comment fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-07 19:36:50 +01:00
Denys Vlasenko
4224647c8d hush: do not allow sh -c '{ echo boo }' 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-07 16:22:35 +01:00
Denys Vlasenko
aeaee43d5a hush: case logic for setting $? was still wrong 
Resetting to 0 should happen in "esac". Matched branch must
still see previous $?.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-04 20:14:04 +01:00
Denys Vlasenko
30bfcf612b hush: non-matching "case" statement sets $? to 0 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-04 18:52:48 +01:00
Denys Vlasenko
672a55e606 hush: allow { cmd } to not be terminated by semicolon in some cases 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-11-04 18:46:14 +01:00
Denys Vlasenko
9db74e49e5 hush: fix "(sleep 1; exit 3) & sleep 2; echo $?; wait $!; echo $?" 
"wait $!" may be just a bit too late: backgrounded $! is gone.
Do not bomb out in this case.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-28 22:39:12 +02:00
Denys Vlasenko
7e6753609d hush: fix "wait PID" 
It was not properly interruptible, and did not update job status
(the exited processes were still thought of as running).

function                                             old     new   delta
process_wait_result                                    -     453    +453
wait_for_child_or_signal                               -     199    +199
run_list                                             996    1002      +6
checkjobs_and_fg_shell                                41      43      +2
builtin_wait                                         328     215    -113
checkjobs                                            516     142    -374
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/2 up/down: 660/-487)          Total: 173 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-28 21:59:09 +02:00
Denys Vlasenko
2eb0a7e1b9 ash: [SHELL] Expand ENV before using it 
Upstream commit:

    Date: Sun, 13 Jul 2008 21:51:52 +0800
    [SHELL] Expand ENV before using it

    Per POSIX ENV needs to undergo parameter expansion.

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

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-27 11:28:59 +02:00
Denys Vlasenko
b7adf7ac32 ash,hush: set exit code 127 in "sh /does/not/exist" case 
Upstream commit 1 for ash:

    [ERROR] Allow the originator of EXERROR to set the exit status

    Some errors have exit status values specified by POSIX and it is
    therefore desirable to be able to set the exit status at the EXERROR
    source rather than in main.c.

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

Upstream commit 2 for ash:

    [INPUT] Use exit status 127 when the script to run does not exist

    This commit makes dash exit with return code 127 instead of 2 if
    started as non-interactive shell with a non-existent command_file
    specified as argument (or a directory), as documented in
     http://www.opengroup.org/onlinepubs/009695399/utilities/sh.html#tag_04_128_14

    The wrong exit code was reported by Clint Adams and Jari Aalto through
     http://bugs.debian.org/548743
     http://bugs.debian.org/548687

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

NB: in fact, http://bugs.debian.org/548687 was not fixed by this:
"sh /dir/" thinks that EISDIR error on read is EOF, and exits 0.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-25 17:00:13 +02:00
Denys Vlasenko
7f0ebbc69e hush: add commented-out debug printouts in "memleak" built-in 
Allocation addresses of malloc() are jittery,
thought I had a mem leak in hush, but it was malloc variability.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-03 17:42:53 +02:00
Denys Vlasenko
a769390da6 hush: fix a memory corruption when exported variable is modified 
The construct such as this:

t=1
export t
t=new_value1

had a small probability of momentarily using free()d value.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-03 15:01:06 +02:00
Denys Vlasenko
04465dad66 hush: fix exitcode on exec failure with EACCES - should be 126 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-03 01:01:15 +02:00
Denys Vlasenko
80729a4472 whitespace fixes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-02 22:33:15 +02:00
Denys Vlasenko
61508d9624 hush: fix var3.tests 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-02 21:12:02 +02:00
Denys Vlasenko
ebedb9478d sh: do not print empty line at the end of "help" output 
It's pointless.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-02 18:45:09 +02:00
Denys Vlasenko
04b46bced9 hush: 'return' should have effect earlier 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-10-01 22:28:03 +02:00
Denys Vlasenko
ed6ff5edfc hush: enable "msh is deprecated" message in msh stub 
After giving a few more years for everyone to notice and migrate,
can nuke all remains of msh.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-30 12:28:37 +02:00
Denys Vlasenko
08755f9bcb hush: fix typo in comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-30 02:02:25 +02:00
Denys Vlasenko
4074d49557 hush: fix interactive input handling of backslash+newline 
function                                             old     new   delta
fgetc_interactive                                      -     258    +258
i_peek_and_eat_bkslash_nl                             43      93     +50
static_peek2                                           7       -      -7
setup_string_in_str                                   46      39      -7
setup_file_in_str                                     47      40      -7
file_peek                                             72      52     -20
expand_vars_to_list                                 1167    1143     -24
file_peek2                                            74       -     -74
file_get                                             326      65    -261
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 1/5 up/down: 308/-400)          Total: -92 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-30 01:49:53 +02:00
Denys Vlasenko
0448c55cc8 hush: G.user_input_buf[] is needed only if line editing is enabled 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-29 20:25:44 +02:00
Denys Vlasenko
46e6498b2a hush: speed optimizations 
Make o_addchr() faster: do not call o_grow_by() each time.
Create i_getch_and_eat_bkslash_nl(), use it instead of peek+getch pair.

function                                             old     new   delta
o_addchr                                              42      54     +12
parse_dollar                                         761     771     +10
o_grow_by                                             48      37     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 24/-11)             Total: 11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-29 19:50:55 +02:00
Denys Vlasenko
657086a3dc hush: fix handling of by backslash-newline in $((arith)) and $(cmd) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-29 18:07:42 +02:00
Denys Vlasenko
d17a91db6e hush: rework input char buffering to allow more than one-deep peek 
...this time with actual hush.c changes too :)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-29 18:02:37 +02:00
Denys Vlasenko
78c9c736ab hush: fix 'eval ""' handling 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-29 01:44:17 +02:00
Denys Vlasenko
992e0ff7e9 hush: fix ". EMPTY_LINE" not setting $? to 0 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-29 01:27:09 +02:00
Denys Vlasenko
d6a37d86ba hush: document better where bad redirect syntax is detected 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-09-20 16:22:24 +02:00
Denys Vlasenko
aa3576a29b hush: fix "redirects can close script fd" bug 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-08-22 19:54:12 +02:00
Denys Vlasenko
7b25b1c5b2 hush: do not leak script fds into NOEXEC children 
We set all opened script fds to CLOEXEC, thus making then go away
after fork+exec.
Unfortunately, CLOFORK does not exist. NOEXEC children will still see those fds open.

For one, "ls" applet is NOEXEC. Therefore running "ls -l /proc/self/fd"
in a script from standalone shell shows this:

lrwx------    1 root     root            64 Aug 20 15:17 0 -> /dev/pts/3
lrwx------    1 root     root            64 Aug 20 15:17 1 -> /dev/pts/3
lrwx------    1 root     root            64 Aug 20 15:17 2 -> /dev/pts/3
lr-x------    1 root     root            64 Aug 20 15:17 3 -> /path/to/top/level/script
lr-x------    1 root     root            64 Aug 20 15:17 4 -> /path/to/sourced/SCRIPT1
...

with as many open fds as there are ". SCRIPTn" nest levels.
Fix it by closing these fds after fork (only for NOEXEC children).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-08-20 15:58:34 +02:00
Denys Vlasenko
869994cf4f hush: bit better comments in redirect code. No logic changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-08-20 15:16:00 +02:00
Denys Vlasenko
e9abe75fda hush: cmd and arithmetic also need the fix for FILE rewind 
Discovered by running testsuite with a newest glibc

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-08-19 20:15:26 +02:00
Denys Vlasenko
215b0ca6e4 hush: fix a bug in FEATURE_SH_STANDALONE=y config. Closes 9186 
Run this in a "sh SCRIPT":

sha256sum /dev/null
echo END

sha256sum is a NOEXEC applet. It runs in a forked child. Then child exit()s.
By this time, entire script is read, and buffered in a FILE object
from fopen("SCRIPT"). But fgetc() did not consume entire input.
exit() lseeks back by -9 bytes, from <eof> to 'e' in 'echo'.
(this may be libc-specific).
This change of fd position *is shared with the parent*!

Now parent can read more, and it thinks there is another "echo END".
End result: two "echo END"s are run.

Fix this by _exit()ing instead.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-08-19 18:43:06 +02:00
Denys Vlasenko
49117b4800 hush: fix a possible bug 
Not sure this was actually a triggerable bug, but the code looked flaky.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2016-07-21 14:42:13 +02:00
Denys Vlasenko
85378cded7 hush: code shrink 
function                                             old     new   delta
builtin_wait                                         347     328     -19

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-11 21:47:11 +02:00
Denys Vlasenko
550bf5b4a4 remove global "jmp_buf die_jmp" from !FEATURE_PREFER_APPLETS builds 
function                                             old     new   delta
xfunc_has_died                                         -      21     +21
sleep_much                                             -      12     +12
sleep10                                                -       9      +9
die_func                                               -       4      +4
fflush_stdout_and_exit                                35      36      +1
builtin_type                                         121     119      -2
die_sleep                                              4       -      -4
xfunc_die                                             60      24     -36
hush_main                                           1128    1011    -117
die_jmp                                              156       -    -156
------------------------------------------------------------------------------
(add/remove: 4/2 grow/shrink: 1/3 up/down: 47/-315)          Total: -268 bytes
   text	   data	    bss	    dec	    hex	filename
 939992	    992	  17652	 958636	  ea0ac	busybox_old
 939880	    992	  17496	 958368	  e9fa0	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-09 16:42:57 +02:00
Denys Vlasenko
d60752f8c9 build system: -fno-builtin-printf 
Benefits are: drops reference to out-of-line putchar(), fixes a few cases
of failed string merge.

function                                             old     new   delta
i2cdump_main                                        1488    1502     +14
sha256_process_block64                               423     433     +10
sendmail_main                                       1183    1185      +2
list_table                                          1114    1116      +2
i2cdetect_main                                      1235    1237      +2
fdisk_main                                          2852    2854      +2
builtin_type                                         119     121      +2
unicode_conv_to_printable2                           325     324      -1
scan_recursive                                       380     378      -2
mkfs_minix_main                                     2687    2684      -3
buffer_fill_and_print                                178     169      -9
putchar                                              152       -    -152
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 7/4 up/down: 34/-167)          Total: -133 bytes
   text    data     bss     dec     hex filename
 937788     932   17676  956396   e97ec busybox_old
 937564     932   17676  956172   e970c busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-07 22:42:45 +02:00
Denys Vlasenko
5711a2a4ad libbb: more compact API for bb_parse_mode() 
function                                             old     new   delta
make_device                                         2182    2188      +6
parse_command                                       1440    1443      +3
parse_params                                        1497    1499      +2
install_main                                         773     769      -4
mkdir_main                                           168     160      -8
getoptscmd                                           641     632      -9
builtin_umask                                        158     147     -11
bb_parse_mode                                        431     410     -21
umaskcmd                                             286     258     -28
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/6 up/down: 11/-81)            Total: -70 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-07 17:55:33 +02:00
Denys Vlasenko
6283f98283 hush: fix umask: umask(022) was setting umask(755) 
Based on the patch by Rich Felker <dalias@libc.org>

function                                             old     new   delta
builtin_umask                                        121     161     +40
umaskcmd                                             318     279     -39

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-10-07 16:56:20 +02:00
Denys Vlasenko
b5be13ccd9 hush: fix a nommu bug where a part of function body is lost if run in a pipe 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-09-04 06:22:10 +02:00
Maninder Singh
97f2f7ca7f Removes stray empty line from code 
This patch removes stray empty line from busybox code
reported by script find_stray_empty_lines

Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Akhilesh Kumar <akhilesh.k@samsung.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-07-13 03:25:46 +02:00
Maninder Singh
97c6491b4e typo fixes 
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-05-25 13:46:36 +02:00
Denys Vlasenko
8dff01d06a libbb: introduce and use is_prefixed_with() 
function                                             old     new   delta
is_prefixed_with                                       -      18     +18
complete_username                                     78      77      -1
man_main                                             737     735      -2
fsck_device                                          429     427      -2
unpack_ar_archive                                     80      76      -4
strip_unsafe_prefix                                  105     101      -4
singlemount                                         1054    1050      -4
rtc_adjtime_is_utc                                    90      86      -4
resolve_mount_spec                                    88      84      -4
parse_one_line                                      1029    1025      -4
parse_conf                                          1460    1456      -4
may_wakeup                                            83      79      -4
loadkmap_main                                        219     215      -4
get_irqs_from_stat                                   103      99      -4
get_header_cpio                                      913     909      -4
findfs_main                                           79      75      -4
fbsplash_main                                       1230    1226      -4
load_crontab                                         776     771      -5
expand_vars_to_list                                 1151    1146      -5
date_main                                            881     876      -5
skip_dev_pfx                                          30      24      -6
make_device                                         2199    2193      -6
complete_cmd_dir_file                                773     767      -6
run_applet_and_exit                                  715     708      -7
uudecode_main                                        321     313      -8
pwdx_main                                            197     189      -8
execute                                              568     560      -8
i2cdetect_main                                      1186    1176     -10
procps_scan                                         1242    1230     -12
procps_read_smaps                                   1017    1005     -12
process_module                                       746     734     -12
patch_main                                          1903    1891     -12
nfsmount                                            3572    3560     -12
stack_machine                                        126     112     -14
process_timer_stats                                  449     435     -14
match_fstype                                         111      97     -14
do_ipaddr                                           1344    1330     -14
open_list_and_close                                  359     343     -16
get_header_tar                                      1795    1779     -16
prepend_new_eth_table                                340     323     -17
fsck_main                                           1811    1794     -17
find_iface_state                                      56      38     -18
dnsd_main                                           1321    1303     -18
base_device                                          179     158     -21
find_keyword                                         104      82     -22
handle_incoming_and_exit                            2785    2762     -23
parse_and_put_prompt                                 774     746     -28
modinfo                                              347     317     -30
find_action                                          204     171     -33
update_passwd                                       1470    1436     -34
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540)         Total: -522 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2015-03-12 17:48:34 +01:00