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fix segfault in lutimes when tv argument is NULL

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calling lutimes with tv=0 is valid if the application wants to set the
timestamps to the current time. this commit makes it so the timespec
struct is populated with values from tv only if tv != 0 and calls
utimensat with times=0 if tv == 0.
This commit is contained in:
Érico Rolim 2020-11-12 17:52:23 -03:00 • committed by Rich Felker
parent 67f774625e
commit c5d118ebbc
1 changed files with 7 additions and 5 deletions
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12
src/legacy/lutimes.c
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@ -6,9 +6,11 @@
int lutimes(const char *filename, const struct timeval tv[2])
{
struct timespec times[2];
times[0].tv_sec = tv[0].tv_sec;
times[0].tv_nsec = tv[0].tv_usec * 1000;
times[1].tv_sec = tv[1].tv_sec;
times[1].tv_nsec = tv[1].tv_usec * 1000;
return utimensat(AT_FDCWD, filename, times, AT_SYMLINK_NOFOLLOW);
if (tv) {
times[0].tv_sec = tv[0].tv_sec;
times[0].tv_nsec = tv[0].tv_usec * 1000;
times[1].tv_sec = tv[1].tv_sec;
times[1].tv_nsec = tv[1].tv_usec * 1000;
}
return utimensat(AT_FDCWD, filename, tv ? times : 0, AT_SYMLINK_NOFOLLOW);
}