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951 Commits

Author SHA1 Message Date
Denys Vlasenko
c97df2939e hush: tweak comment, no code changes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-08-14 11:04:58 +02:00
Denys Vlasenko
4bf0854248 hush: add a comment on how globbing (should) work 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-08-11 18:44:11 +02:00
Denys Vlasenko
19358cc313 ash,hush: fold shell_builtin_read() way-too-many params into a struct param 
function                                             old     new   delta
getoptscmd                                           587     584      -3
readcmd                                              240     224     -16
shell_builtin_read                                  1426    1399     -27
builtin_read                                         210     182     -28
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-74)             Total: -74 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-08-05 18:11:15 +02:00
Denys Vlasenko
fd6f295a98 hush: set IFS to default on startup 
function                                             old     new   delta
hush_main                                           1095    1110     +15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-08-05 18:11:15 +02:00
Denys Vlasenko
e9dccab9f4 hush: fix fallout from FILE->HFILE conversion 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-08-05 18:11:15 +02:00
Denys Vlasenko
c2aa218f23 ash,hush: properly handle ${v//pattern/repl} if pattern starts with / 
Closes 2695

function                                             old     new   delta
parse_dollar                                         762     790     +28
subevalvar                                          1258    1267      +9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 37/0)               Total: 37 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-08-04 22:25:28 +02:00
Denys Vlasenko
54fdabda3b hush: speed up ${var:+ARG} for literal ARGs 
function                                             old     new   delta
first_special_char_in_vararg                           -      52     +52
expand_one_var                                      2248    2296     +48
encode_then_expand_vararg                            357     336     -21
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 100/-21)            Total: 79 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-31 10:36:29 +02:00
Denys Vlasenko
a5db1d7354 hush: fix another case where empty "for" wasn't setting exitcode to 0 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-28 12:42:08 +02:00
Denys Vlasenko
a8e7441176 hush: disable debug_indent increment/decrement for HUSH_DEBUG < 2 builds 
function                                             old     new   delta
run_list                                            1063    1046     -17
parse_stream                                        2296    2249     -47
run_pipe                                            1890    1840     -50
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-114)           Total: -114 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-28 12:16:30 +02:00
Denys Vlasenko
aa449c927d hush: make "set -x" output don't redirectable when fd#2 redirected 
function                                             old     new   delta
x_mode_print_optionally_squoted                        -     120    +120
x_mode_flush                                           -      68     +68
save_fd_on_redirect                                  208     243     +35
x_mode_prefix                                          -      27     +27
x_mode_addblock                                        -      23     +23
x_mode_addchr                                          -      17     +17
dump_cmd_in_x_mode                                   110      85     -25
run_pipe                                            1919    1890     -29
print_optionally_squoted                             145       -    -145
------------------------------------------------------------------------------
(add/remove: 5/1 grow/shrink: 1/2 up/down: 290/-199)           Total: 91 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-28 12:13:58 +02:00
Denys Vlasenko
4b70c926bc hush: make "set -x" output closer to bash 
function                                             old     new   delta
print_optionally_squoted                               -     145    +145
run_pipe                                            1902    1919     +17
dump_cmd_in_x_mode                                   142     110     -32
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 162/-32)           Total: 130 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2018-07-27 17:43:39 +02:00
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