emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
17,239 Commits 1 Branch 0 Tags 33 MiB
7d06d6e186
Commit Graph

2429 Commits

Author SHA1 Message Date
Ron Yorston
4a36ef11ac ash: regressions in process substitution 
Stacy Harper reports that this script:

   test() { . /tmp/bb_test; }
   echo "export TEST=foo" >/tmp/bb_test
   test 2>/dev/null
   echo "$TEST"

correctly prints 'foo' in BusyBox 1.33 but hangs in 1.34.

Bisection suggested the problem was caused by commit a1b0d3856 (ash: add
process substitution in bash-compatibility mode).  Removing the call to
unwindredir() in cmdloop() introduced in that commit makes the script
work again.

Additionally, these examples of process substitution:

   while true; do cat <(echo hi); done
   f() { while true; do cat <(echo hi); done }
   f

result in running out of file descriptors.  This is a regression from
v5 of the process substitution patch caused by changes to evalcommand()
not being transferred to v6.

function                                             old     new   delta
static.pushredir                                       -      99     +99
evalcommand                                         1729    1750     +21
exitreset                                             69      86     +17
cmdloop                                              372     365      -7
unwindredir                                           28       -     -28
pushredir                                            112       -    -112
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 2/1 up/down: 137/-147)          Total: -10 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-09-02 17:49:00 +02:00
Denys Vlasenko
21afddefd2 hush: fix "error: invalid preprocessing directive ##" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-08-15 20:08:53 +02:00
Denys Vlasenko
37460f5daf hush: tweak ${var/pattern/repl} optimization 
function                                             old     new   delta
expand_one_var                                      2507    2502      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-27 18:13:39 +02:00
Denys Vlasenko
49cc3cac30 hush: optimize ${var/pattern/repl} for trivial patterns 
function                                             old     new   delta
expand_one_var                                      2353    2507    +154

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-27 17:53:55 +02:00
Denys Vlasenko
c450437a4e shell: update psubst testcases 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-27 04:20:32 +02:00
Denys Vlasenko
8dd676c6c3 hush: add missed "undef" 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-27 04:09:45 +02:00
Denys Vlasenko
b278d82c61 hush: implement $'str' bashism 
function                                             old     new   delta
parse_dollar_squote                                    -     441    +441
encode_then_expand_vararg                            359     380     +21
parse_stream                                        2252    2271     +19
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 481/0)             Total: 481 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-26 15:32:46 +02:00
Denys Vlasenko
05c5d745f7 ahell: update testsuite 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-25 22:03:16 +02:00
Denys Vlasenko
53d45c934f ash: speed up ${v//pattern/repl} 
function                                             old     new   delta
subevalvar                                          1447    1457     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-25 21:54:14 +02:00
Denys Vlasenko
1310d7b1d1 ash: speed up ${v//pattern/repl} if !ASH_OPTIMIZE_FOR_SIZE 
function                                             old     new   delta
subevalvar                                          1353    1447     +94
.rodata                                           104179  104184      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 99/0)               Total: 99 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-07-22 18:15:59 +02:00
Denys Vlasenko
53a7a9cd8c ash: parser: Fix VSLENGTH parsing with trailing garbage 
Let's adopt Herbert Xu's patch, not waiting for it to reach dash git:
hush already has a similar fix.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-25 02:09:41 +02:00
Denys Vlasenko
ad57e4e4b2 ash: revert accidental change (should have been separate) 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-25 02:08:38 +02:00
Denys Vlasenko
96436fb36a e2fsprogs/*: remove ioctl calling obfuscation 
function                                             old     new   delta
change_attributes                                    326     416     +90
list_attributes                                      222     248     +26
close_silently                                        22       -     -22
.rodata                                           103722  103692     -30
fgetsetversion                                        74       -     -74
fgetsetprojid                                        107       -    -107
fgetsetflags                                         148       -    -148
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 2/1 up/down: 116/-381)         Total: -265 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-23 12:56:40 +02:00
Denys Vlasenko
97c3b5e3ff hush: fix bkslash+newline handling and number validation in ${NN} and ${#NN} 
Entering "${1a}" into interactive shell was making it exit.

function                                             old     new   delta
parse_dollar                                         824     958    +134
i_getch_and_eat_bkslash_nl                             -      44     +44
parse_expr                                           917     938     +21
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 199/0)             Total: 199 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-19 15:45:45 +02:00
Denys Vlasenko
83a4967e50 hush: fix handling of "cmd && &" 
function                                             old     new   delta
done_pipe                                            213     231     +18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-15 18:14:27 +02:00
Denys Vlasenko
1b7a9b68d0 hush: fix handling of \^C and "^C" 
function                                             old     new   delta
parse_stream                                        2238    2252     +14
encode_string                                        243     256     +13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 27/0)               Total: 27 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-15 16:46:30 +02:00
Denys Vlasenko
1f60d88cf6 *: more --help tweaks 
function                                             old     new   delta
packed_usage                                       33552   33541     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-15 10:00:18 +02:00
Denys Vlasenko
e2b9215868 *: --help tweaks 
function                                             old     new   delta
packed_usage                                       33589   33552     -37

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-14 20:47:20 +02:00
Denys Vlasenko
4c4b02c290 ash: save Ron's patch from oblivion 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-06 13:01:25 +02:00
Denys Vlasenko
457825f77a shells: do not allow bare "read" in non-bash compat configs 
On Sat, Feb 9, 2019 Cristian Ionescu-Idbohrn wrote:
    > In my case (at work), I have to watch and prevent people from doing
    > unportable things.  For me, that's a burden.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-06 12:08:43 +02:00
Ron Yorston
a1b0d3856d ash: add process substitution in bash-compatibility mode 
Process substitution is a Korn shell feature that's also available
in bash and some other shells.  This patch implements process
substitution in ash when ASH_BASH_COMPAT is enabled.

function                                             old     new   delta
argstr                                              1386    1522    +136
strtodest                                              -      52     +52
readtoken1                                          3346    3392     +46
.rodata                                           183206  183250     +44
unwindredir                                            -      28     +28
cmdloop                                              365     372      +7
static.spclchars                                      10      12      +2
cmdputs                                              380     367     -13
exitreset                                             86      69     -17
evalcommand                                         1754    1737     -17
varvalue                                             675     634     -41
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 5/4 up/down: 315/-88)           Total: 227 bytes
   text	   data	    bss	    dec	    hex	filename
 953967	   4219	   1904	 960090	  ea65a	busybox_old
 954192	   4219	   1904	 960315	  ea73b	busybox_unstripped

v2: Replace array of file descriptors with a linked list.
    Include tests that were unaccountably omitted from v1.
v3: Update linked list code to the intended version.
v4: Change order of conditional code in cmdputs().
v5: Use existing popredir() mechanism to manage file descriptors.
v6: Rebase to latest version of BusyBox ash.  Reduce code churn.

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-05 23:37:19 +02:00
Eicke Herbertz
1b30c63dfd shell: also do word splitting when -d DELIM is used 
The original commit 3bef5d89b0 introduced an additional check
for an unset `opt_d` before doing word splitting. I'm unsure
why it's there in the first place, but the commit message also
describes a different behaviour than what -d actually does in
bash, while the code mostly does the right thing.

`opt_d` sets the line delimiter for read to stop reading and
should not affect word splitting.

Testcase:
$ echo qwe rty | { read -d Z a b; echo a:$a b:$b; }
a:qwe b:rty

function                                             old     new   delta
shell_builtin_read                                  1314    1304     -10

Signed-off-by: Eicke Herbertz <wolletd@posteo.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-06-05 18:06:47 +02:00
Denys Vlasenko
f0c0c56e9b hush: beautify ^D handling to match ash / bash 
function                                             old     new   delta
fgetc_interactive                                    227     244     +17

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-04-13 16:42:17 +02:00
Denys Vlasenko
cbfdeba660 hush: make LINENO selectable without BASH-COMPAT 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-03-10 16:31:05 +01:00
Denys Vlasenko
33745b1fc8 ash: placate -Werror=format-security 
"In function 'sprint_status48':
 error: format not a string literal and no format arguments"

function                                             old     new   delta
sprint_status48                                      160     158      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-18 13:45:49 +01:00
Ron Yorston
cad3fc743a libbb: introduce and use fputs_stdout 
function                                             old     new   delta
fputs_stdout                                           -      12     +12
zxc_vm_process                                      7237    7230      -7
yes_main                                              85      78      -7
write_block                                          380     373      -7
wrapf                                                305     298      -7
strings_main                                         437     430      -7
show_bridge                                          353     346      -7
rev_main                                             384     377      -7
put_prompt_custom                                     58      51      -7
put_cur_glyph_and_inc_cursor                         168     161      -7
print_numbered_lines                                 152     145      -7
print_named_ascii                                    130     123      -7
print_name                                           135     128      -7
print_login_issue                                    386     379      -7
print_ascii                                          208     201      -7
powertop_main                                       1249    1242      -7
od_main                                             1789    1782      -7
logread_main                                         518     511      -7
head_main                                            804     797      -7
display_process_list                                1319    1312      -7
cut_main                                            1002     995      -7
bb_dump_dump                                        1550    1543      -7
bb_ask_noecho                                        393     386      -7
baseNUM_main                                         702     695      -7
expand_main                                          755     745     -10
dumpleases_main                                      497     487     -10
write1                                                12       -     -12
putcsi                                                37      23     -14
print_login_prompt                                    55      41     -14
paste_main                                           525     511     -14
cat_main                                             440     426     -14
print_it                                             245     230     -15
print_addrinfo                                      1188    1171     -17
print_rule                                           770     750     -20
print_linkinfo                                       842     822     -20
httpd_main                                           791     771     -20
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/34 up/down: 12/-341)         Total: -329 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-02-03 20:52:40 +01:00
Denys Vlasenko
2b7c1aa92c ash: match bash behavior for ${empty_var/*/repl} 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-09 08:46:54 +01:00
Denys Vlasenko
883cdb79a4 ash: fix ${unset_var/pattern/repl} 
function                                             old     new   delta
subevalvar                                          1349    1353      +4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-09 08:27:37 +01:00
Denys Vlasenko
4e039bab37 ash: improve --help 
function                                             old     new   delta
packed_usage                                       33504   33499      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-04 03:50:38 +01:00
Denys Vlasenko
3b053051c7 hush: code shrink 
function                                             old     new   delta
hush_main                                           1071    1066      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-5)               Total: -5 bytes
   text	   data	    bss	    dec	    hex	filename
1020110	    559	   5020	1025689	  fa699	busybox_old
1020037	    559	   5020	1025616	  fa650	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-04 03:05:34 +01:00
Denys Vlasenko
85158b600d ash: code shrink 
function                                             old     new   delta
ash_main                                            1218    1202     -16

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-03 12:14:58 +01:00
Denys Vlasenko
3f8ec00b0c ash: make a strdup copy of $HISTFILE for line editing 
Otherwise if $HISTFILE is unset or reassigned, bad things can happen.

function                                             old     new   delta
ash_main                                            1210    1218      +8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2021-01-03 10:55:39 +01:00
Denys Vlasenko
3c13da3dab libbb: introduce and use xgettimeofday(), do not truncate 64-bit time_t in shells 
function                                             old     new   delta
xgettimeofday                                          -      11     +11
get_local_var_value                                  280     281      +1
svlogd_main                                         1323    1322      -1
change_epoch                                          67      66      -1
timestamp_and_log                                    461     458      -3
hwclock_main                                         301     298      -3
fmt_time_bernstein_25                                135     132      -3
step_time                                            331     326      -5
script_main                                         1207    1202      -5
machtime                                              34      28      -6
curtime                                               61      54      -7
ts_main                                              423     415      -8
nmeter_main                                          761     751     -10
gettime1900d                                          67      46     -21
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/12 up/down: 12/-73)           Total: -61 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-30 23:48:01 +01:00
Denys Vlasenko
77a51a2709 randomconfig fixes 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-29 16:53:11 +01:00
Denys Vlasenko
c7ef818768 hush: make comment more clear 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-27 16:04:54 +01:00
Denys Vlasenko
cad20ced86 typo fix 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-25 19:08:16 +01:00
Denys Vlasenko
1237d627e9 hush: fix this case: echo "SCRIPT" | hush 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-25 19:01:49 +01:00
Denys Vlasenko
46a71dc30c hush: if !EDITING, do not regenerate prompt for every input char 
function                                             old     new   delta
fgetc_interactive                                    261     258      -3
pseudo_exec_argv                                     406     399      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-10)             Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-25 18:49:29 +01:00
Denys Vlasenko
51a471d05d ash: change "clear ungetc counter on syntax errors" fix to match dash 
function                                             old     new   delta
ash_main                                            1203    1210      +7
raise_exception                                       39      26     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 7/-13)              Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-24 00:22:24 +01:00
Denys Vlasenko
521220ed1a hush: fix ^C in INTERACTIVE, !EDITING config 
function                                             old     new   delta
refill_HFILE_and_getc                                 88     170     +82
fgetc_interactive                                    226     250     +24
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 106/0)             Total: 106 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-23 23:44:55 +01:00
Denys Vlasenko
18bcaf374c hush: revert "make interactive ^C break out of PS2 mode" 
It made ^C break out of the entire shell, if we aren't in PS2 mode.
Need a better idea.

function                                             old     new   delta
expand_one_var                                      2344    2353      +9
syntax_error_unterm_ch                                21      29      +8
parse_dollar                                         817     824      +7
parse_stream                                        2251    2238     -13
fgetc_interactive                                    249     227     -22
syntax_error_unterm_str                               26       -     -26
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 3/2 up/down: 24/-61)            Total: -37 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-23 23:01:18 +01:00
Denys Vlasenko
649acb9e23 hush: fix PS1 prompth in !EDITING config 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-23 15:29:13 +01:00
Denys Vlasenko
a7b52d26c4 hush: fix fallout from tweaking ${var:START:LEN} code 
function                                             old     new   delta
expand_one_var                                      2344    2353      +9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-23 12:38:03 +01:00
Denys Vlasenko
93e2a22482 shell: for signal exitcode, use 128 | sig, not 128 + sig - MIPS has signal 128 
function                                             old     new   delta
wait_for_child_or_signal                             213     214      +1
refill_HFILE_and_getc                                 89      88      -1
getstatus                                             97      96      -1
builtin_wait                                         339     337      -2
checkjobs                                            187     183      -4
process_wait_result                                  450     444      -6
waitcmd                                              290     281      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/6 up/down: 1/-23)             Total: -22 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-23 12:23:21 +01:00
Denys Vlasenko
0ab2dd4f28 hush: fix comment 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-23 02:22:08 +01:00
Denys Vlasenko
00eb23b47a bc: do not allocate line editing state until needed 
function                                             old     new   delta
xc_read_line                                         324     353     +29
free_line_input_t                                     34      39      +5
xc_vm_init                                           656     640     -16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 34/-16)             Total: 18 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-21 21:36:58 +01:00
Denys Vlasenko
07abc7c6f7 hush: deal with FIXMEs for corner cases in parameter expansion 
function                                             old     new   delta
expand_one_var                                      2323    2344     +21

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-21 10:14:18 +01:00
Denys Vlasenko
bb4e32befa hush: remove one redundant getpid() on every startup 
function                                             old     new   delta
hush_main                                           1151    1147      -4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-20 16:36:00 +01:00
Denys Vlasenko
2124c0ec97 ash: clear ungetc counter on syntax errors 
function                                             old     new   delta
raise_exception                                       26      39     +13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-19 14:33:02 +01:00
Denys Vlasenko
91e330a53f shells: a fix for systems without RLIMIT_NICE 
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
 2020-12-17 12:07:54 +01:00