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date: recognize bogus FreeBSD gmtime output

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Most gmtime implementations return a NULL value when they
encounter an error (and this behavior is specified by ANSI C
and POSIX).  FreeBSD's implementation, however, will simply
leave the "struct tm" untouched.  Let's also recognize this
and convert it to a NULL (with this patch, t4212 should pass
on FreeBSD).

Reported-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2014-04-01 17:28:42 -04:00
committed by Junio C Hamano
parent 3f419d45ef
commit 6654754779
4 changed files with 45 additions and 0 deletions
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7
git-compat-util.h
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@ -697,4 +697,11 @@ void warn_on_inaccessible(const char *path);
/* Get the passwd entry for the UID of the current process. */
struct passwd *xgetpwuid_self(void);
#ifdef GMTIME_UNRELIABLE_ERRORS
struct tm *git_gmtime(const time_t *);
struct tm *git_gmtime_r(const time_t *, struct tm *);
#define gmtime git_gmtime
#define gmtime_r git_gmtime_r
#endif
#endif