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982 Commits

Author SHA1 Message Date
Denys Vlasenko
332e4115c9 hush: make var nesting code independent of "local" support 
Also, add code to abort at ~65000 function recursion depth.
SEGVing is not as nice as exiting with a message (and restoring termios!):

$ f() { echo -n .; f; }; f
....<many dots later>....hush: fatal recursion (depth 65281)

function                                             old     new   delta
run_pipe                                            1826    1890     +64
pseudo_exec_argv                                     544     554     +10
parse_and_run_file                                    71      80      +9
i_getch                                              104     107      +3
done_command                                          99     102      +3
set_local_var                                        508     510      +2
helper_export_local                                  214     215      +1
builtin_local                                         49      46      -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 7/1 up/down: 92/-3)              Total: 89 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-04 22:35:13 +02:00
Denys Vlasenko
61407807ab hush: fix for readonly vars in "ro=A ro=B cmd" case 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-04 21:14:28 +02:00
Denys Vlasenko
fbf44854a3 hush: support "f() (cmd)" functions 
Many other shells support this construct

function                                             old     new   delta
parse_stream                                        2950    3018     +68

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-03 14:56:52 +02:00
Denys Vlasenko
49015a60cb hush: fix mishandling of "true | f() { echo QWE; }" 
function                                             old     new   delta
run_pipe                                            1820    1826      +6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-03 13:02:43 +02:00
Denys Vlasenko
5fa0505f8a hush: fix "set -e; false || x=1; echo OK" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-03 11:21:13 +02:00
Denys Vlasenko
11752d46d1 hush: one-word, no-globbing handling of local/export/readonly args 
function                                             old     new   delta
done_word                                            738     790     +52

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-03 08:20:58 +02:00
Denys Vlasenko
abf755615e hush: fix a backslash-removal bug in case 
function                                             old     new   delta
run_list                                            1270    1053    -217

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-02 17:25:18 +02:00
Denys Vlasenko
8b536eb40d hush: remove stray debugging printout 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-02 13:26:16 +02:00
Denys Vlasenko
e84212f834 hush: update information comment about heredoc discrepancy 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-01 20:11:23 +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
Denys Vlasenko
bb6f573ad2 hush: add a comment where we differ from bash wrt heredoc EOF mark handling 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-01 18:55:00 +02:00
Denys Vlasenko
1e5111b0f8 ash,hush: handle a few more bkslash-newline cases 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-01 03:04:55 +02:00
Denys Vlasenko
a94eeb0b42 hush: fix heredoc_bkslash_newline1.tests failure 
function                                             old     new   delta
parse_stream                                        2787    2827     +40
builtin_type                                         117     115      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-31 20:16:31 +02:00
Denys Vlasenko
6ffaa00338 hush: fix a signedness bug 
Testcase:

set -- a ""; space=" "; printf "<%s>\n" "$@"$space

Before:
<a >
After:
<a>
<>

It usually does not bite since bbox forces -funsigned-char build.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-31 00:48:18 +02:00
Denys Vlasenko
d1b845706d hush: add a FIXME comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-28 18:42:54 +02:00
Denys Vlasenko
9acd63c92c ash,hush: fix "saved" redirected fds still visible in children 
Based on a patch by Mark Marshall <mark.marshall@omicronenergy.com>

function                                             old     new   delta
dup_CLOEXEC                                            -      49     +49
fcntl_F_DUPFD                                         46       -     -46

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-28 18:35:07 +02:00
Denys Vlasenko
33f7c8f200 hush: code shrink 
function                                             old     new   delta
run_pipe                                            1589    1591      +2
pseudo_exec_argv                                     374     375      +1
builtin_type                                         114     115      +1
find_function                                          8       -      -8
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 3/0 up/down: 4/-8)               Total: -4 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-06 17:21:57 +01:00
Denys Vlasenko
d4802c6243 hush: fix a='a\\'; echo "${a%\\\\}" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-02 20:48:36 +01:00
Denys Vlasenko
55f8133a4f shell: tweak bkslash_in_varexp.tests, add bkslash_in_varexp1.tests 
It turns out bkslash_in_varexp.tests was a bash bug :]

ash and hush fail "corrected" bkslash_in_varexp.tests as well,
just not as badly as I thought (hush gets half of the cases right).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-03-02 18:12:12 +01:00
Denys Vlasenko
aa617ac097 hush: simplify process_command_subs() 
Incidentally, this fixes LINENO bug here:

echo "1:${LINENO}"
echo "2:`echo; echo`"  # was counting lines in the `cmd` output as LINENO++
echo "3:${LINENO}"

function                                             old     new   delta
parse_and_run_file                                    53      71     +18
expand_vars_to_list                                 1187    1164     -23
setup_file_in_str                                     25       -     -25
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/1 up/down: 18/-48)            Total: -30 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-02-13 15:31:19 +01:00
Denys Vlasenko
f786901c4b hush: probably fixing a bug in last LINENO fix 
I don't have an example of mishandled script, but the logic looked wrong:
it could sometimes treat newlines as if they are spaces.

function                                             old     new   delta
parse_stream                                        2788    2787      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-02-08 19:39:42 +01:00
Denys Vlasenko
5807e18f0c hush: LINENO fix 
Script triggering the bug:

	t=0
	echo "at line ${LINENO}"
	while [ ${t} -lt 10 ]; do
		echo "at line ${LINENO}"  # LINENO was 3 instead of 4 here
		t=$((t+1))
	done

function                                             old     new   delta
parse_stream                                        2754    2788     +34
done_word                                            711     738     +27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 61/0)               Total: 61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-02-08 19:19:04 +01:00
Denys Vlasenko
749575d3c5 hush: protect against self-modifying trap code 
function                                             old     new   delta
check_and_run_traps                                  211     236     +25

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-30 04:29:03 +01:00
Denys Vlasenko
54c2111781 hush: add HUSH_BASH_SOURCE_CURDIR config option, to be on par with ash 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-27 20:46:45 +01:00
Denys Vlasenko
f7e0feaf97 hush: fix dot builtin to not search current directory 
function                                             old     new   delta
builtin_source                                       182     209     +27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-27 19:05:59 +01:00
Denys Vlasenko
cba79a87f8 hush: fix two corner cases in ${v/pattern/repl}. Closes 10686 
function                                             old     new   delta
expand_one_var                                      1592    1618     +26

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-25 14:07:40 +01:00
Denys Vlasenko
0ca3198f93 hush: fix handling of $_ (so far it's an ordinary variable, no special meaning) 
function                                             old     new   delta
parse_dollar                                         820     779     -41

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-25 13:20:50 +01:00
Denys Vlasenko
46f839c3f7 hush: fix a case where EXIT trap may modify its code mid-flight 
function                                             old     new   delta
hush_exit                                             93      99      +6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-19 16:58:44 +01:00
Denys Vlasenko
b8d076b00b hush: fix build if !BASH_LINENO_VAR 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-19 16:00:57 +01:00
Denys Vlasenko
6aad1ddcc9 hush: implement $LINENO bashism 
function                                             old     new   delta
run_pipe                                            1697    1774     +77
unset_local_var_len                                  258     301     +43
hush_main                                           1009    1051     +42
set_local_var                                        516     554     +38
parse_and_run_file                                    42      75     +33
i_getch                                               96     116     +20
.rodata                                            18858   18876     +18
done_command                                         106     122     +16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 8/0 up/down: 287/0)             Total: 287 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-19 15:52:36 +01:00
Denys Vlasenko
9809a82b59 hush: fix raw ^C handlisg in single-quoted strings 
function                                             old     new   delta
parse_stream                                        2719    2754     +35

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-13 19:14:27 +01:00
Denys Vlasenko
afb73a25ea hush: tweak command -vV printing code, no logic changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-12 16:17:59 +01:00
Denys Vlasenko
5700029c65 hush: implement "command -v -V" 
function                                             old     new   delta
pseudo_exec_argv                                     231     374    +143
if_command_vV_print_and_exit                           -     127    +127
builtin_set                                          267     273      +6
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 276/0)             Total: 276 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-12 14:41:45 +01:00
Denys Vlasenko
3bb3e1d0a1 hush: implement "command" builtin (no options are supported yet) 
function                                             old     new   delta
pseudo_exec_argv                                     194     231     +37

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-11 18:05:05 +01:00
Denys Vlasenko
1f1911239c hush: fix handling of ^C in eval 
function                                             old     new   delta
run_list                                            1044    1259    +215
builtin_eval                                          45     126     +81
expand_strvec_to_string                               91       -     -91
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 2/0 up/down: 296/-91)           Total: 205 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-11 13:17:30 +01:00
Denys Vlasenko
932b9971d0 hush: fix handling of raw ^C in scripts: "echo ^C" 
function                                             old     new   delta
expand_vars_to_list                                 1133    1187     +54
parse_stream                                        2690    2719     +29

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-11 12:39:48 +01:00
Denys Vlasenko
aaf7a2e24d hush: remove dead code 
function                                             old     new   delta
done_word                                            761     711     -50

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-01-11 11:19:00 +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
25f3b737dc hush: fix comment parsing in cmd, closes 10421 
function                                             old     new   delta
parse_stream                                        2692    2690      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-10-22 15:55:48 +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
55af51c66d hush: reuse "OPTIND=..." string 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-29 13:48:49 +02:00
Denys Vlasenko
238ff98bb8 hush: fix "getopts" builtin to not be upset by other builtins calling getopt() 
function                                             old     new   delta
builtin_getopts                                      363     403     +40
unset_local_var_len                                  185     215     +30
set_local_var                                        440     466     +26
reset_traps_to_defaults                              151     157      +6
pseudo_exec_argv                                     320     326      +6
install_special_sighandlers                           52      58      +6
pick_sighandler                                       62      65      +3
execvp_or_die                                         85      88      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 8/0 up/down: 120/0)             Total: 120 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-29 13:38:30 +02:00
Denys Vlasenko
048491fbdc hush: trivial code shrink in builtin_getopts 
function                                             old     new   delta
builtin_getopts                                      368     363      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-17 12:36:39 +02:00
Denys Vlasenko
4476c70301 ash,hush: comment and debug tweaks, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-15 15:27:41 +02:00
Denys Vlasenko
419db0391e hush: implement "silent" optstrings of ":opts" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-11 17:21:14 +02:00
Denys Vlasenko
d16e612c93 hush: fix redirect code (was using uninitialized variables) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-11 15:41:39 +02:00
Denys Vlasenko
9a7d0a0191 shell: add OPTARG poisoning to getopt_optarg.tests 
ash fails this!

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-11 02:37:48 +02:00
Denys Vlasenko
81f962f3df hush: teach getopts to set/unset OPTARG 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-11 02:05:21 +02:00
Denys Vlasenko
74d4058928 hush: getopts builtin 
function                                             old     new   delta
builtin_getopts                                        -     271    +271
bltins1                                              372     384     +12
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 283/0)             Total: 283 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-11 01:32:46 +02:00
Denys Vlasenko
11f2e99c13 hush: optional times builtin 
function                                             old     new   delta
builtin_times                                          -     108    +108
bltins1                                              360     372     +12
static.times_tbl                                       -       9      +9
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/0 up/down: 129/0)             Total: 129 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-10 16:34:03 +02:00
Denys Vlasenko
1f41c885fc hush: implement -d DELIM option for 'read' 
The POSIX standard only requires the 'read' builtin to handle '-r':
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/read.html

However, Bash introduced the option '-d <DELIM>' to override IFS for
just one invocation, and it is quite useful.

We already support this in ash, let's add it to hush, too.

function                                             old     new   delta
builtin_read                                         263     284     +21
.rodata                                           163587  163589      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 23/0)               Total: 23 bytes

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-08-09 13:52:36 +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
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
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
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
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
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
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
2093ad296f hush: fix ${##}, ${#?}, ${#!} handling 
function                                             old     new   delta
parse_dollar                                         786     820     +34
expand_one_var                                      1579    1592     +13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 47/0)               Total: 47 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-26 00:07:27 +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
645c697372 hush: treat ${#?} as "length of $?" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-25 15:18:57 +02:00
Denys Vlasenko
621fc50e83 hush: fix a case when redirect to a closed fd #1 is not restoring (closing) it 
function                                             old     new   delta
setup_redirects                                      200     245     +45
append_squirrel                                        -      41     +41
save_fds_on_redirect                                 256     221     -35
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 86/-35)             Total: 51 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-24 12:42:17 +02:00
Denys Vlasenko
0675b03de4 hush: use mempcpy where useful 
function                                             old     new   delta
o_addblock                                            58      42     -16
expand_one_var                                      1618    1555     -63
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-79)             Total: -79 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-24 02:17:05 +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
f9d656f787 hush: remove contradicting size info in config help 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 22:23:55 +02:00
Denys Vlasenko
4eed2c6c50 Update menuconfig items with approximate applet sizes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 22:01:24 +02:00
Denys Vlasenko
d2c15bc763 hush: tweak "help" output 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 18:14:42 +02:00
Denys Vlasenko
cf5110978b hush: fix readonly2.tests failure 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 15:58:02 +02:00
Denys Vlasenko
5b2cc0aaee hush: do not assign to readonly VAR in "VAR=VAL CMD" syntax too 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 02:44:06 +02:00
Denys Vlasenko
38ef39a1ab hush: add readonly testcase, fix fallout 
function                                             old     new   delta
helper_export_local                                  185     214     +29
run_pipe                                            1549    1560     +11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 40/0)               Total: 40 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 01:40:01 +02:00
Denys Vlasenko
3bab36b18b hush: convert exp/ro/local parameters to bitfields in one flag param 
function                                             old     new   delta
helper_export_local                                  174     185     +11
set_local_var                                        424     420      -4
run_list                                            1048    1044      -4
set_vars_and_save_old                                 88      83      -5
set_local_var_from_halves                             27      22      -5
run_pipe                                            1554    1549      -5
builtin_export                                       173     168      -5
set_pwd_var                                           40      34      -6
builtin_readonly                                      70      64      -6
expand_one_var                                      1625    1618      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/9 up/down: 11/-47)            Total: -36 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-18 01:05:24 +02:00
Denys Vlasenko
6b0695bb66 hush: HUSH_READONLY depends on HUSH 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 21:47:27 +02:00
Denys Vlasenko
6b48e1f121 hush: forgot to emit error on (failing) second "readonly VAR=VAL" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 21:31:17 +02:00
Denys Vlasenko
b95ee96e75 hush: smaller code in !READONLY configs 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 21:19:53 +02:00
Denys Vlasenko
1e660422b1 hush: implement "readonly" builtin 
function                                             old     new   delta
builtin_readonly                                       -      70     +70
helper_export_local                                  152     174     +22
bltins1                                              348     360     +12
expand_one_var                                      1620    1625      +5
builtin_export                                       168     173      +5
set_pwd_var                                           36      40      +4
set_local_var                                        410     414      +4
set_vars_and_save_old                                 85      88      +3
set_local_var_from_halves                             24      27      +3
run_pipe                                            1551    1554      +3
run_list                                            1046    1048      +2
builtin_type                                         116     114      -2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 10/1 up/down: 133/-2)           Total: 131 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 21:10:50 +02:00
Denys Vlasenko
0ba80e4fa2 hush: small fix to last commit 
die_if_script() indeed dies only in scripts! Must handle the case where it continues.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 16:50:20 +02:00
Denys Vlasenko
e32b6503e7 hush: support ${VAR:N:-M} 
function                                             old     new   delta
expand_one_var                                      1602    1615     +13
builtin_type                                         114     116      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 16:46:57 +02:00
Denys Vlasenko
203fd7bc66 shells: expand TODO comments, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-17 16:13:35 +02:00
Denys Vlasenko
b24e55da84 hush: fix "cmd1 && cmd2 &" handling on NOMMU 
function                                             old     new   delta
done_pipe                                            234     238      +4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-16 20:29:35 +02:00
Denys Vlasenko
ee553b929c hush: fix and_or_and_backgrounding.tests failure 
function                                             old     new   delta
done_pipe                                            133     218     +85

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2017-07-15 22:51:55 +02:00
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