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39517: back off 39502 (WC_ASSIGN causes fork in pipe).

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This isn't a robust fix as WC_ASSIGNs simply precede the main wordcode.
This commit is contained in:
Peter Stephenson 2016-09-30 11:34:15 +01:00
parent d08674ef8c
commit bb2bbcc944
3 changed files with 12 additions and 7 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2016-09-30 Peter Stephenson <p.stephenson@samsung.com>
* 39517: back off 39502, this isn't a robust fix.
* 39498: Src/parmas.c,Src/zsh.h: use PRIVILEGED option to
decide on problematic parameter imports.

2
Src/exec.c
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@ -1844,7 +1844,7 @@ execpline2(Estate state, wordcode pcode,
/* if we are doing "foo | bar" where foo is a current *
* shell command, do foo in a subshell and do the *
* rest of the pipeline in the current shell. */
if ((wc_code(code) >= WC_CURSH || wc_code(code) == WC_ASSIGN)
if ((wc_code(code) >= WC_CURSH)
&& (how & Z_SYNC)) {
int synch[2];
struct timeval bgtime;

15
Test/A01grammar.ztst
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@ -757,9 +757,12 @@
>}
>Stuff here
x=1
x=2 | echo $x
echo $x
0:Assignment-only current shell commands in LHS of pipelin
>1
>1
## This problem is hard to fix without significant changes to how
## the shell forks for a pipeline.
#
# x=1
# x=2 | echo $x
# echo $x
# 0:Assignment-only current shell commands in LHS of pipelin
# >1
# >1