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>
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
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(add/remove: 0/1 grow/shrink: 3/2 up/down: 24/-61) Total: -37 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Based on patch by Joachim Nilsson <troglobit@gmail.com>
function old new delta
pgetc 570 547 -23
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This significantly syncronises ash-signals and hush-signals tests.
function old new delta
process_wait_result 449 450 +1
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream commit:
Date: Tue, 2 Jun 2020 23:46:48 +1000
jobs: Fix waitcmd busy loop
We need to clear gotsigchld in waitproc because it is used as
a loop conditional for the waitcmd case. Without it waitcmd
may busy loop after a SIGCHLD.
This patch also changes gotsigchld into a volatile sig_atomic_t
to prevent compilers from optimising its accesses away.
Fixes: 6c691b3e5099 ("jobs: Only clear gotsigchld when waiting...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This change also incorporates other changes to bring us closer to upstream.
function old new delta
dowait 553 636 +83
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream commit:
Date: Fri, 10 Apr 2020 21:03:09 +1000
jobs: Fix infinite loop in waitproc
After we changed the resetting of gotsigchld so that it is only
done if jp is NULL, we can now get an infinite loop in waitproc
if gotsigchld is set but there is no outstanding child because
everything had been waited for previously without gotsigchld being
zeroed.
This patch fixes it by always zeroing gotsigchld as we did before.
The bug that the previous patch was trying to fix is now resolved
by switching the blocking mode to DOWAIT_NORMAL after the specified
job has been completed so that we really do wait for all outstanding
dead children.
Reported-by: Harald van Dijk <harald@gigawatt.nl>
Fixes: 6c691b3e5099 ("jobs: Only clear gotsigchld when waiting...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
function old new delta
dowait 553 631 +78
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream tried it, and then reverted by:
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 26 May 2020 23:19:05 +1000
parser: Fix double-backslash nl in old-style command sub
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
With bash's read builtin it is possible to read from a file (e.g.
device-tree) until the first '\0' character:
IFS= read -r -d '' VARIABLE < file
In busybox ash the -d extension is also implemented, but checking the
read character for '\0' has to be performed after comparing with the
delimiter.
Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
show_history() checks that its argument in non-null so there's
no need to repeat the test at call sites.
function old new delta
historycmd 25 17 -8
builtin_history 29 21 -8
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(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-16) Total: -16 bytes
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Since commit 7eb8eecbb (ash: eval: Add assignment built-in support
again) building BusyBox with the 'command' built-in disabled fails.
parse_command_args() only needs to be called when the 'command'
built-in is run. Which it won't be if it's disabled.
v2: Avoiding infinite loops is good, too. Thanks, Harald van Dijk.
Reported-by: Deweloper <deweloper@wp.pl>
Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream commit:
Date: Wed, 12 Sep 2018 14:27:16 +0800
expand: Fix multiple issues with EXP_DISCARD in evalvar
The commit 3cd538634f71538370f5af239f342aec48b7470b broke parameter
expansion in multiple ways because the EXP_DISCARD flag wasn't set
or tested for various cases:
$ src/dash -c 'var=; echo ${var:+nonempty}'
nonempty
$ src/dash -u -c 'unset foo bar; echo ${foo+${bar}}'
dash: 1: bar: parameter not set
$ src/dash -c 'foo=bar; echo ${foo=BUG}; echo $foo'
barBUG
bar
$
This patch fixes them by introducing a new discard variable that
tracks whether the extra word should be discarded or not when it
is parsed.
Reported-by: Martijn Dekker <martijn@inlv.org>
Fixes: 3cd538634f71 ("expand: Do not reprocess data when...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reported-by: Martijn Dekker <martijn@inlv.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream patch:
Date: Wed, 30 May 2018 02:06:03 +0800
expand: Do not reprocess data when expanding words
Currently various paths will reprocess data when performing word
expansion. For example, expari will skip backwards looking for
the start of the arithmetic expansion, while evalvar will skip
unexpanded words manually.
This is cumbersome and error-prone. This patch fixes this by
making word expansions proceed in a linear fashion. This means
changing argstr and the various expansion functions such as expari
and subevalvar to return the next character to be expanded.
This is inspired by similar code from FreeBSD. However, we take
things one step further and completely remove the manual word
skipping in evalvar. This is accomplished by introducing a new
EXP_DISCARD flag that tells argstr to only parse and not produce
any actual expansions.
Incidentally, argstr will now always NUL-terminate the expansion
unless the EXP_WORD flag is set. This is because all but one
caller of argstr wants the result to be NUL-termianted.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Also includes two one-line follow-up fixes:
expand: Eat closing brace for length parameter
if (subtype == VSLENGTH) {
+ p++;
if (flag & EXP_DISCARD)
expand: Fix double-decrement in argstr
- newloc = expdest - (char *)stackblock() - end;
+ newloc = q - (char *)stackblock() - end;
and changes in code for bash substring extensions.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
