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990 Commits

Author SHA1 Message Date
Denys Vlasenko
9dda9270df hush: fix "set -x" output prefix overlapping for v="..cmd.." case 
Was printing initial "+" prefix for the assignment, that printing

	"+ cmd"

then printing the expanded " v=VAL" string.

Delay printing of "+" prefix for the assignment to after expansion.

function                                             old     new   delta
run_pipe                                            1883    1902     +19
builtin_eval                                         127     133      +6
expand_vars_to_list                                 1103    1106      +3
dump_cmd_in_x_mode                                   144     142      -2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 28/-2)              Total: 26 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-27 14:12:05 +02:00
Denys Vlasenko
186cf49767 hush: in some cases, expand_on_ifs() relied of uninitialized memory 
The n > 0 check to prevent access to the last byte of non-existing argv[-1]
wasn't enough. Switched to making sure there are initialized (zero) bytes there.

A predictable testcase is rather hard to construct, unfortunately,
contents of memory depends on allocator behavior and whatnot.

function                                             old     new   delta
o_save_ptr_helper                                    119     137     +18
expand_on_ifs                                        345     339      -6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 18/-6)              Total: 12 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-27 12:14:39 +02:00
Denys Vlasenko
7c5f18a3ba hush: improve set -x: make "+++" indent level increase in cmd and eval. 
function                                             old     new   delta
dump_cmd_in_x_mode                                   126     144     +18
run_pipe                                            1873    1883     +10
builtin_eval                                         119     127      +8
expand_vars_to_list                                 1100    1103      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 39/0)               Total: 39 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-26 15:21:50 +02:00
Denys Vlasenko
945e9b05c9 hush: fix/explain corner cases of redirection colliding with script fd 
function                                             old     new   delta
save_fd_on_redirect                                  200     208      +8
run_pipe                                            1870    1873      +3
setup_redirects                                      321     322      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 12/0)               Total: 12 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-24 18:01:22 +02:00
Denys Vlasenko
41ef41b3e0 hush: fix nested redirects colliding with script fds 
This necessitates switch from libc FILE api to a simple
homegrown replacement.
The change which fixes the bug here is the deleting of

	restore_redirected_FILEs();

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

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

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-24 16:54:41 +02:00
Denys Vlasenko
dfc7394763 hush: handle backslash-newline in heredoc terminators 
function                                             old     new   delta
fetch_heredocs                                       479     527     +48

(ash fails this test)

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-24 14:03:18 +02:00
Denys Vlasenko
474cb20555 hush: fix handling of heredocs not enclosed in groups where they are "declared" 
function                                             old     new   delta
fetch_heredocs                                         -     479    +479
parse_and_run_stream                                 146     148      +2
parse_stream                                        2787    2296    -491
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 481/-491)          Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-24 13:03:03 +02:00
Denys Vlasenko
3675c37b9b hush: fix heredoc handling in the "cmd <<EOF ;<newline>" case 
function                                             old     new   delta
parse_stream                                        2759    2787     +28

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-23 16:31:21 +02:00
Denys Vlasenko
d73cdbf84c hush: fix handling of heredocs starting with empty lines 
function                                             old     new   delta
parse_stream                                        2748    2759     +11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-23 15:43:57 +02:00
Denys Vlasenko
f36caa4071 hush: never glob result of dquoted "${v:+/bin/c*}" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 19:29:41 +02:00
Denys Vlasenko
4c3c8a1a61 hush: tidy up code after previous commits 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 19:11:09 +02:00
Denys Vlasenko
1856740ec0 hush: better names for o_free_unsafe() / o_free(), no logic changes 
o_free() made o_string NULL-initialized,
o_free_unsafe() did not bother reinitializing (expected caller to not need it).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 17:51:31 +02:00
Denys Vlasenko
83e434d5b5 hush: fix handling of '' in ${var:+ARG} 
This wasn't an ash bug in dollar_altvalue9, it was hush bug (and bash!)

function                                             old     new   delta
expand_one_var                                      2236    2254     +18
expand_vars_to_list                                 1097    1103      +6
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 24/0)               Total: 24 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 17:36:06 +02:00
Denys Vlasenko
294eb4612c hush: fix word splitting in ${v:+ARG} - dollar_altvalue1 test 
ash might be a bit buggy, need to investigate dollar_altvalue9 test

function                                             old     new   delta
expand_one_var                                      1639    2236    +597
expand_variables                                     112     128     +16
expand_vars_to_list                                 1117    1097     -20
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 613/-20)           Total: 593 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 16:29:43 +02:00
Denys Vlasenko
57235beb69 hush: expand_vars_to_list() should not assume it starts new word 
function                                             old     new   delta
expand_variables                                     112     115      +3
expand_vars_to_list                                 1117    1108      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 3/-9)               Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 16:27:26 +02:00
Denys Vlasenko
18e8b61292 hush: remove pointless "next" var, simplify expand_vars_to_list() 
function                                             old     new   delta
o_addstr                                               -      26     +26
expand_vars_to_list                                 1112    1117      +5
encode_then_expand_vararg                            398     382     -16
parse_dollar                                         779     762     -17
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/2 up/down: 31/-33)             Total: -2 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 16:27:26 +02:00
Denys Vlasenko
168579a34c hush: store "ended_in_ifs" flag in o_string 
This simplifies function parameter passing.

function                                             old     new   delta
expand_one_var                                      1643    1639      -4
append_str_maybe_ifs_split                            64      52     -12
expand_vars_to_list                                 1125    1112     -13
expand_on_ifs                                        361     345     -16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-45)             Total: -45 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 16:27:26 +02:00
Denys Vlasenko
8a6a461504 hush: propagate (output,n) parameters into expand_one_var() 
This is necessary since expand_one_var() for ${var:+ARG} must create more than one
output word, and thus can't simply return a char*.

function                                             old     new   delta
expand_one_var                                      1610    1643     +33
expand_vars_to_list                                 1139    1125     -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 33/-14)             Total: 19 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 16:27:26 +02:00
Denys Vlasenko
116b50a5c1 hush: make expand_vars_to_list() a bit more sane 
function                                             old     new   delta
append_str_maybe_ifs_split                             -      64     +64
expand_vars_to_list                                 1167    1139     -28
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 64/-28)             Total: 36 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-20 16:27:26 +02:00
Denys Vlasenko
e36a5894bd hush: reduce indentation, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-18 16:12:23 +02:00
Denys Vlasenko
2e71101e31 hush: fix 'x=; echo ${x:-"$@"}' producing 'BUG in varexp2' message 
function                                             old     new   delta
expand_string_to_string                              126     128      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-18 16:02:25 +02:00
Denys Vlasenko
8b08d5a502 hush: smaller code to set o_string to "" 
function                                             old     new   delta
encode_then_expand_vararg                            399     398      -1
parse_stream                                        2753    2748      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-18 15:50:04 +02:00
Denys Vlasenko
4c201c00a3 whitespace fixes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-17 15:04:17 +02:00
Denys Vlasenko
0d2e0de42b hush: faster/smaller code to check for presense of multiple chars in string 
Go over the string only once.

function                                             old     new   delta
encode_then_expand_string                            126     105     -21
encode_then_expand_vararg                            443     399     -44
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-65)             Total: -65 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-17 14:33:19 +02:00
Denys Vlasenko
b762c784ca hush: improve ${var#...}, ${var:+...} and ${var/.../...} - handle quoting 
dollar_altvalue1 test partially fails: word splitting of unquoted ${var:+...}
is not correct

function                                             old     new   delta
encode_then_expand_vararg                              -     443    +443
expand_one_var                                      1599    1610     +11
parse_stream                                        2756    2753      -3
encode_string                                        250     242      -8
setup_heredoc                                        308     298     -10
expand_and_evaluate_arith                            106      96     -10
encode_then_expand_string                            142     126     -16
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/5 up/down: 454/-47)           Total: 407 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-17 14:21:38 +02:00
Denys Vlasenko
b0441a7189 hush: shrink code in builtin_eval 
function                                             old     new   delta
builtin_eval                                         126     119      -7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-15 18:03:56 +02:00
Denys Vlasenko
35a017c0c5 hush: unset_local_var_len is only used by unset_local_var 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-06-26 18:27:54 +02:00
Denys Vlasenko
b2b14cbd4c hush: fix compile problem found by randomconfig 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-06-26 18:09:22 +02:00
Denys Vlasenko
d1a83234c0 hush: fix dup_CLOEXEC() call without "avoid_fd" parameter 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-06-26 15:50:33 +02:00
Denys Vlasenko
c96bb2c5ab hush: fix for !ENABLE_HUSH_MODE_X configuration 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-06-26 15:43:56 +02:00
Denys Vlasenko
99496dc716 hush: variable nesting code is used also if HUSH_FUNCTIONS is not enabled 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-06-26 15:36:58 +02:00
Denys Vlasenko
817a20296f randomconfig fixes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-06-26 15:35:17 +02:00
Denys Vlasenko
f693b606b7 hush: fix recent breakage from parse_stream() changes 
function                                             old     new   delta
parse_stream                                        3808    3821     +13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-11 20:00:43 +02:00
Denys Vlasenko
9678636911 hush: IFS fixes 
$ IFS=": "; x=" "; set x $x; for v; do echo "|$v|"; done
|x|
$ IFS=": "; x=":"; set x $x; for v; do echo "|$v|"; done
|x|
||

function                                             old     new   delta
run_pipe                                            1789    1870     +81
expand_on_ifs                                        310     361     +51
pseudo_exec_argv                                     588     591      +3
builtin_local                                         50      53      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 138/0)             Total: 138 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-11 16:02:58 +02:00
Denys Vlasenko
34179956f9 hush: fix "$v" expansion in case patterns when v='[a]' 
function                                             old     new   delta
run_list                                            1053    1063     +10
setup_redirects                                      311     320      +9
encode_then_expand_string                            135     142      +7
run_pipe                                            1784    1789      +5
expand_assignments                                    81      86      +5
expand_string_to_string                              124     125      +1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/0 up/down: 37/0)               Total: 37 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-11 13:47:59 +02:00
Denys Vlasenko
0403bedccc hush: optimize parse_stream() 
Since we check for '\' anyway when we determine whether we can look ahead,
we can just check for *and handle* it there.

function                                             old     new   delta
parse_stream                                        2751    2740     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-11 01:34:46 +02:00
Denys Vlasenko
89e9d5534d hush: do not drop backslash from eval 'echo ok\' 
newer bash does not drop it, most other shells too

function                                             old     new   delta
unbackslash                                           39      57     +18
parse_stream                                        2753    2751      -2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 18/-2)              Total: 16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-11 01:15:33 +02:00
Denys Vlasenko
3632cb15f1 shell: add comments about [[, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 15:25:41 +02:00
Denys Vlasenko
4709df0f15 hush: fix handling of \<eof> in double-quoted strings 
function                                             old     new   delta
encode_string                                        268     250     -18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 14:49:01 +02:00
Denys Vlasenko
bcf56114fa hush: fix eval 'echo ok\' 
function                                             old     new   delta
parse_stream                                        2762    2753      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 14:40:23 +02:00
Denys Vlasenko
92a930b4e8 hush: simplify \<newline> code, part 3 
function                                             old     new   delta
parse_stream                                        2780    2762     -18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 14:27:08 +02:00
Denys Vlasenko
e8b1bc0481 hush: simplify \<newline> code, part 2 
function                                             old     new   delta
parse_stream                                        2787    2780      -7

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 14:23:49 +02:00
Denys Vlasenko
1c57269b5d hush: simplify \<newline> code, part 1 
function                                             old     new   delta
parse_stream                                        2919    2787    -132

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 14:23:49 +02:00
Denys Vlasenko
09b7a7ec0e hush: put "current word" structure into parsing context 
function                                             old     new   delta
done_word                                            790     767     -23
parse_stream                                        3018    2919     -99
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-122)           Total: -122 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-10 03:22:10 +02:00
Denys Vlasenko
9db344a0f4 hush: fix var_leaks.tests and var_preserved.tests on NOMMU 
function                                             old     new   delta
remove_nested_vars                                     -      77     +77
run_pipe                                            1756    1786     +30
pseudo_exec_argv                                     376     379      +3
leave_var_nest_level                                  98      32     -66
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/1 up/down: 110/-66)            Total: 44 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-09 19:05:11 +02:00
Denys Vlasenko
eb0de05d68 hush: fix func_return2.tests on NOMMU 
function                                             old     new   delta
hush_main                                           1714    1718      +4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-09 17:54:07 +02:00
Denys Vlasenko
8d6eab3225 hush: fix prompt in multi-line $(()) 
Now shows PS2 in this case:

/path/to/dir $ a=b; echo $((
> _

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-07 17:01:31 +02:00
Denys Vlasenko
f5018dac21 hush: fix "unset PS1/PS2", and put them into initial variable set 
"unset PS1/PS2" causes prompts to be empty strings

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

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-06 17:58:21 +02:00
Denys Vlasenko
00bd76728d hush: if we did match "LINENO" or "OPTIND", stop further comparisons 
function                                             old     new   delta
handle_changed_special_names                          99     101      +2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-06 14:57:53 +02:00
Denys Vlasenko
cf079ffe1c hush: consolidate handling of setting/unsetting of PSn, LINENO, OPTIND 
function                                             old     new   delta
handle_changed_special_names                           -      99     +99
unset_local_var                                      256     155    -101
set_local_var                                        557     437    -120
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 99/-221)          Total: -122 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-06 14:50:12 +02:00
Denys Vlasenko
de02625985 hush: update to correctly handle changed var_bash[346].tests 
function                                             old     new   delta
expand_one_var                                      1612    1604      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 17:04:53 +02:00
Denys Vlasenko
f2ed39b930 hush: implement "hush -s" 
function                                             old     new   delta
hush_main                                           1015    1031     +16
packed_usage                                       32757   32745     -12
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 16/-12)              Total: 4 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 16:46:49 +02:00
Denys Vlasenko
21b7f1b6b6 hush: fix a few more corner cases with empty-expanding cmds 
See added testcases

function                                             old     new   delta
run_pipe                                            1723    1784     +61

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 15:15:53 +02:00
Denys Vlasenko
41d8f10813 hush: fix corner cases with exec in empty expansions 
Cases like these:

var=val exec >redir

var=val `` >redir

function                                             old     new   delta
run_pipe                                            1701    1723     +22
redirect_and_varexp_helper                            56      55      -1
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 22/-1)              Total: 21 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 14:41:21 +02:00
Denys Vlasenko
929a41d577 hush: less mind-bending set_vars_and_save_old() 
function                                             old     new   delta
run_pipe                                            1651    1701     +50
set_local_var                                        510     557     +47
pseudo_exec_argv                                     544     581     +37
redirect_and_varexp_helper                            64      56      -8
set_vars_and_save_old                                164     149     -15
unset_local_var                                      274     256     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/3 up/down: 134/-41)            Total: 93 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 14:09:14 +02:00
Denys Vlasenko
4e1dc539e9 hush: "no logic changes" in last commit was not true, fix it up 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 13:10:34 +02:00
Denys Vlasenko
34f6b12330 hush: make run_pipe code simpler to understand, no logic changes 
function                                             old     new   delta
run_pipe                                            1641    1651     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 11:30:17 +02:00
Denys Vlasenko
d358b0b65d hush: fix a bug where we don't properly handle f() { a=A; b=B; }; a= f 
function                                             old     new   delta
unset_local_var                                       20     274    +254
leave_var_nest_level                                   -      98     +98
set_vars_and_save_old                                128     164     +36
enter_var_nest_level                                   -      32     +32
builtin_local                                         46      50      +4
pseudo_exec_argv                                     554     544     -10
redirect_and_varexp_helper                            77      64     -13
run_pipe                                            1890    1641    -249
unset_local_var_len                                  267       -    -267
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 3/3 up/down: 424/-539)         Total: -115 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-04-05 00:51:55 +02:00
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