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shells: update README and testsuite. environment memory leak

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needs to be fixed - and documented!
This commit is contained in:
Denis Vlasenko 2007-05-21 10:19:48 +00:00
parent 219e88d050
commit 8805eeb44a
3 changed files with 17 additions and 1 deletions
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16
shell/README
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Various bits of what is known about busybox shells, in no particular order. Various bits of what is known about busybox shells, in no particular order.
2006-05-06 2007-05-21
hush: environment cannot be handled by libc routines as they are leaky
(by API design and thus unfixable): hush will leak memory in this script,
bash does not:
pid=$$
while true; do
unset t;
t=111111111111111111111111111111111111111111111111111111111111111111111111
export t
ps -o vsz,pid,comm | grep " $pid "
done
The fix is to not use setenv/putenv/unsetenv but manipulate env ourself. TODO.
hush: meanwhile, first three command subst bugs mentioned below are fixed. :)
2007-05-06
hush: more bugs spotted. Comparison with bash: hush: more bugs spotted. Comparison with bash:
bash-3.2# echo "TEST`date;echo;echo`BEST" bash-3.2# echo "TEST`date;echo;echo`BEST"
TESTSun May 6 09:21:05 CEST 2007BEST [we dont strip eols] TESTSun May 6 09:21:05 CEST 2007BEST [we dont strip eols]

1
shell/hush_test/hush-parsing/process_subst.right
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TESTzzBEST TESTzzBEST
TEST$(echo zz)BEST TEST$(echo zz)BEST
TEST'BEST

1
shell/hush_test/hush-parsing/process_subst.tests
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echo "TEST`echo zz;echo;echo`BEST" echo "TEST`echo zz;echo;echo`BEST"
echo "TEST`echo '$(echo zz)'`BEST" echo "TEST`echo '$(echo zz)'`BEST"
echo "TEST`echo "'"`BEST"