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msh: fix "while...continue" bug 3884.

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This commit is contained in:
Denis Vlasenko 2008-07-20 23:03:23 +00:00
parent 2b68c8f744
commit 7ae1cc16b4
3 changed files with 24 additions and 0 deletions
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8
shell/msh.c
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@ -2573,6 +2573,10 @@ static int execute(struct op *t, int *pin, int *pout, int no_fork)
while (setjmp(bc.brkpt))
if (isbreak)
goto broken;
/* Restore areanum value. It may be incremented by execute()
* below, and then "continue" may jump back to setjmp above */
areanum = a + 1;
freearea(areanum + 1);
brkset(&bc);
for (t1 = t->left; i-- && *wp != NULL;) {
setval(vp, *wp++);
@ -2586,6 +2590,10 @@ static int execute(struct op *t, int *pin, int *pout, int no_fork)
while (setjmp(bc.brkpt))
if (isbreak)
goto broken;
/* Restore areanum value. It may be incremented by execute()
* below, and then "continue" may jump back to setjmp above */
areanum = a + 1;
freearea(areanum + 1);
brkset(&bc);
t1 = t->left;
while ((execute(t1, pin, pout, /* no_fork: */ 0) == 0) == (t->op_type == TWHILE))

1
shell/msh_test/msh-execution/many_continues.right Normal file
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@ -0,0 +1 @@
OK

15
shell/msh_test/msh-execution/many_continues.tests Executable file
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@ -0,0 +1,15 @@
if test $# = 0; then
# Child will kill us in 1 second
"$THIS_SH" "$0" $$ &
# Loop many, many times
trap 'echo OK; exit 0' 15
while true; do
continue
done
echo BAD
exit 1
fi
sleep 1
kill $1