[PATCH] fsck: Fix incorrect handling of child exit

[dietmar.schindler at manroland-web.com]

> -----Original Message-----
> From: busybox [mailto:busybox-bounces at busybox.net] On Behalf Of Niklas Hambüchen
> Sent: Thursday, May 24, 2018 9:51 PM
>
> …
> The way you do it now, using WEXITSTATUS in all cases where it's not WIFSIGNALED, makes the
> assumption that WIFSIGNALED is the precise inverse of WIFEXITED.
>
> But I haven't found the glibc (API) to make that guarantee anywhere.

There's, among other cases, this paragraph in The Open Group Base Specification http://pubs.opengroup.org/onlinepubs/9699919799/functions/wait.html:

"If the information pointed to by stat_loc was stored by a call to waitpid() that did not specify the WUNTRACED or WCONTINUED flags, or by a call to the wait() function, exactly one of the macros WIFEXITED(*stat_loc) and WIFSIGNALED(*stat_loc) shall evaluate to a non-zero value."
--
Best regards,
Dietmar Schindler
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