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hush: fix for "while false && true; do echo BUG; break; done". closes 6170

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function                                             old     new   delta
run_list                                             959     941     -18

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2013-04-07 18:16:58 +02:00
parent d35cbad0ef
commit 3beab83e4f
3 changed files with 16 additions and 10 deletions
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19
shell/hush.c
View File

@ -7354,7 +7354,7 @@ static int run_list(struct pipe *pi)
* and we should not execute CMD */
debug_printf_exec("skipped cmd because of || or &&\n");
last_followup = pi->followup;
continue;
goto dont_check_jobs_but_continue;
}
}
last_followup = pi->followup;
@ -7493,8 +7493,10 @@ static int run_list(struct pipe *pi)
G.flag_break_continue = 0;
/* else: e.g. "continue 2" should *break* once, *then* continue */
} /* else: "while... do... { we are here (innermost list is not a loop!) };...done" */
if (G.depth_break_continue != 0 || fbc == BC_BREAK)
goto check_jobs_and_break;
if (G.depth_break_continue != 0 || fbc == BC_BREAK) {
checkjobs(NULL);
break;
}
/* "continue": simulate end of loop */
rword = RES_DONE;
continue;
@ -7502,7 +7504,6 @@ static int run_list(struct pipe *pi)
#endif
#if ENABLE_HUSH_FUNCTIONS
if (G.flag_return_in_progress == 1) {
/* same as "goto check_jobs_and_break" */
checkjobs(NULL);
break;
}
@ -7544,6 +7545,9 @@ static int run_list(struct pipe *pi)
if (rword == RES_IF || rword == RES_ELIF)
cond_code = rcode;
#endif
check_jobs_and_continue:
checkjobs(NULL);
dont_check_jobs_but_continue: ;
#if ENABLE_HUSH_LOOPS
/* Beware of "while false; true; do ..."! */
if (pi->next
@ -7555,22 +7559,17 @@ static int run_list(struct pipe *pi)
/* "while false; do...done" - exitcode 0 */
G.last_exitcode = rcode = EXIT_SUCCESS;
debug_printf_exec(": while expr is false: breaking (exitcode:EXIT_SUCCESS)\n");
goto check_jobs_and_break;
break;
}
}
if (rword == RES_UNTIL) {
if (!rcode) {
debug_printf_exec(": until expr is true: breaking\n");
check_jobs_and_break:
checkjobs(NULL);
break;
}
}
}
#endif
check_jobs_and_continue:
checkjobs(NULL);
} /* for (pi) */
#if ENABLE_HUSH_JOB

1
shell/hush_test/hush-misc/while4.right Normal file
View File

@ -0,0 +1 @@
Ok:0

6
shell/hush_test/hush-misc/while4.tests Executable file
View File

@ -0,0 +1,6 @@
false
while false && echo Not reached; do
echo BUG
break
done
echo Ok:$?