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hush: "wait $!; echo $?" should return 127 if $! already exited

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It would be nice to provide bash-like "remember las exitcode"
thingy, but it's a bit complex. For now, match ash and dash.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2016-11-07 23:07:21 +01:00
parent 62b717b75e
commit 26ad94bedc
1 changed files with 5 additions and 4 deletions
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9
shell/hush.c
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@ -9636,12 +9636,13 @@ static int FAST_FUNC builtin_wait(char **argv)
/* "wait $!" but last bg task has already exited. Try:
* (sleep 1; exit 3) & sleep 2; echo $?; wait $!; echo $?
* In bash it prints exitcode 0, then 3.
* In dash, it is 127.
*/
ret = 0; /* FIXME */
continue;
/* ret = G.last_bg_pid_exitstatus - FIXME */
} else {
/* Example: "wait 1". mimic bash message */
bb_error_msg("wait: pid %d is not a child of this shell", (int)pid);
}
/* Example: "wait 1". mimic bash message */
bb_error_msg("wait: pid %d is not a child of this shell", (int)pid);
} else {
/* ??? */
bb_perror_msg("wait %s", *argv);