Adding previously skipped "readtoken1(pgetc_eatbnl(), syntax_type..." change
from upstream commit:
Date: Thu Mar 8 08:37:11 2018 +0100
parser: use pgetc_eatbnl() in more places
dash has a pgetc_eatbnl function in parser.c which skips any
backslash-newline combinations. It's not used everywhere it could be.
There is also some duplicated backslash-newline handling elsewhere in
parser.c. Replace most of the calls to pgetc() with calls to
pgetc_eatbnl() and remove the duplicated backslash-newline handling.
Testcase:
PS1='\
:::'
should result in ::: prompt, not <newline>::: prompt
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream commit:
Date: Sun, 17 May 2020 23:36:25 +1000
parser: Save and restore heredoclist in expandstr
On Sun, May 17, 2020 at 01:19:28PM +0100, Harald van Dijk wrote:
> This still does not restore the state completely. It does not clean up any
> pending heredocs. I see:
>
> $ PS1='$(<<EOF "'
> src/dash: 1: Syntax error: Unterminated quoted string
> $(<<EOF ":
> >
>
> That is, after entering the ':' command, the shell is still trying to read
> the heredoc from the prompt.
This patch saves and restores the heredoclist in expandstr.
It also removes a bunch of unnecessary volatiles as those variables
are only referenced in case of a longjmp other than one started by
a signal like SIGINT.
function old new delta
expandstr 268 255 -13
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream commit:
Date: Tue, 28 Apr 2020 01:15:26 +1000
parser: Fix handling of empty aliases
Dash was incorrectly handling empty aliases. When attempting to use an
empty alias with nothing else, I'm (incorrectly) prompted for more
input:
```
$ alias empty=''
$ empty
>
```
Other shells (e.g., bash, yash) correctly handle the lone, empty alias as an
empty command:
```
$ alias empty=''
$ empty
$
```
The problem here is that we incorrectly enter the loop eating TNLs
in readtoken(). This patch fixes it by setting checkkwd correctly.
function old new delta
list 351 355 +4
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upsteam commit:
Date: Mon, 17 May 2021 15:19:23 +0800
eval: Do not cache value of eflag in evaltree
Patrick Brünn <P.Bruenn@beckhoff.com> wrote:
> Since we are migrating to Debian bullseye, we discovered a new behavior
> with our scripts, which look like this:
>>cleanup() {
>> set +e
>> rmdir ""
>>}
>>set -eu
>>trap 'cleanup' EXIT INT TERM
>>echo 'Hello world!'
>
> With old dash v0.5.10.2 this script would return 0 as we expected it.
> But since commit 62cf6955f8abe875752d7163f6f3adbc7e49ebae it returns
> the last exit code of our cleanup function.
...
Thanks for the report. This is actually a fairly old bug with
set -e that's just been exposed by the exit status change. What's
really happening is that cleanup itself is triggering a set -e
exit incorrectly because evaltree cached the value of eflag prior
to the function call.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Upstream commit:
Date: Thu, 4 Jun 2020 21:53:55 +1000
eval: Check nflag in evaltree instead of cmdloop
This patch moves the nflag check from cmdloop into evaltree. This
is so that nflag will be in force even if we enter the shell via a
path other than cmdloop, e.g., through sh -c.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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>
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>
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>
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>
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>
"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>
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>
