+2011-06-07 Paul Eggert <eggert@cs.ucla.edu>
+
+ stat-time: get_stat_birthtime failure is better-defined
+ * lib/stat-time.h (get_stat_birthtime): If the time is not available,
+ return a timestamp whose tv_sec and tv_nsec values are both -1.
+ Previously, the spec said only that the tv_nsec value was negative.
+ This upward-compatible change simplifies GNU tar a bit.
+
2011-06-07 Eric Blake <eblake@redhat.com>
strerror_r-posix: work around cygwin 1.7.9
}
/* Return *ST's birth time, if available; otherwise return a value
- with negative tv_nsec. */
+ with tv_sec and tv_nsec both equal to -1. */
static inline struct timespec
get_stat_birthtime (struct stat const *st)
{
t.tv_sec = st->st_ctime;
t.tv_nsec = 0;
#else
- /* Birth time is not supported. Set tv_sec to avoid undefined behavior. */
+ /* Birth time is not supported. */
t.tv_sec = -1;
t.tv_nsec = -1;
/* Avoid a "parameter unused" warning. */
using zero. Attempt to work around this problem. Alas, this can
report failure even for valid time stamps. Also, NetBSD
sometimes returns junk in the birth time fields; work around this
- bug if it is detected. There's no need to detect negative
- tv_nsec junk as negative tv_nsec already indicates an error. */
- if (t.tv_sec == 0 || 1000000000 <= t.tv_nsec)
- t.tv_nsec = -1;
+ bug if it is detected. */
+ if (! (t.tv_sec && 0 <= t.tv_nsec && t.tv_nsec < 1000000000))
+ {
+ t.tv_sec = -1;
+ t.tv_nsec = -1;
+ }
#endif
return t;