int
rpl_fstat (int fd, struct stat *buf)
{
#if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY
/* Handle the case when rpl_open() used a dummy file descriptor to work
around an open() that can't normally visit directories. */
const char *name = _gl_directory_name (fd);
if (name != NULL)
return stat (name, buf);
#endif
#ifdef WINDOWS_NATIVE
/* Fill the fields ourselves, because the original fstat function returns
values for st_atime, st_mtime, st_ctime that depend on the current time
zone. See
<https://lists.gnu.org/r/bug-gnulib/2017-04/msg00134.html> */
HANDLE h = (HANDLE) _get_osfhandle (fd);
if (h == INVALID_HANDLE_VALUE)
{
errno = EBADF;
return -1;
}
return _gl_fstat_by_handle (h, NULL, buf);
#else
return stat_time_normalize (orig_fstat (fd, buf), buf);
#endif
}
int
rpl_fstat (int fd, struct stat *buf)
{
#if REPLACE_FCHDIR && REPLACE_OPEN_DIRECTORY
/* Handle the case when rpl_open() used a dummy file descriptor to work
around an open() that can't normally visit directories. */
const char *name = _gl_directory_name (fd);
if (name != NULL)
return stat (name, buf);
#endif
return fstat_nothrow (fd, buf);
}
/* Like fdopendir, except the result controls a clone of FD. It is
the caller's responsibility both to close FD and (if the result is
not null) to closedir the result. */
static DIR *
fd_clone_opendir (int fd, struct saved_cwd const *cwd)
{
if (REPLACE_FCHDIR || ! cwd)
{
DIR *dir = NULL;
int saved_errno = EOPNOTSUPP;
char buf[OPENAT_BUFFER_SIZE];
char *proc_file = openat_proc_name (buf, fd, ".");
if (proc_file)
{
dir = opendir (proc_file);
saved_errno = errno;
if (proc_file != buf)
free (proc_file);
}
# if REPLACE_FCHDIR
if (! dir && EXPECTED_ERRNO (saved_errno))
{
char const *name = _gl_directory_name (fd);
return (name ? opendir (name) : NULL);
}
# endif
errno = saved_errno;
return dir;
}
else
{
if (fchdir (fd) != 0)
return NULL;
else
{
DIR *dir = opendir (".");
int saved_errno = errno;
if (restore_cwd (cwd) != 0)
openat_restore_fail (errno);
errno = saved_errno;
return dir;
}
}
}
int
fchdir (int fd)
{
const char *name = _gl_directory_name (fd);
return name ? chdir (name) : -1;
}