merely accepted and ignored, for compatibility. Starting two years
ago, with coreutils-7.0, its use evoked a warning.
+ stat now outputs the full sub-second resolution for the atime,
+ mtime, and ctime values since the Epoch, when using the %X, %Y, and
+ %Z directives of the --format option. This matches the fact that
+ %x, %y, and %z were already doing so for the human-readable variant.
+
touch's --file option is no longer recognized. Use --reference=F (-r)
instead. --file has not been documented for 15 years, and its use has
elicited a warning since coreutils-7.1.
return str;
}
+static char * ATTRIBUTE_WARN_UNUSED_RESULT
+epoch_time (struct timespec t)
+{
+ static char str[INT_STRLEN_BOUND (time_t) + sizeof ".NNNNNNNNN"];
+ /* Note that time_t can technically be a floating point value, such
+ that casting to [u]intmax_t could lose a fractional value or
+ suffer from overflow. However, most porting targets have an
+ integral time_t; also, we know of no file systems that store
+ valid time values outside the bounds of intmax_t even if that
+ value were represented as a floating point. Besides, the cost of
+ converting to struct tm just to use nstrftime (str, len, "%s.%N",
+ tm, 0, t.tv_nsec) is pointless, since nstrftime would have to
+ convert back to seconds as time_t. */
+ if (TYPE_SIGNED (time_t))
+ sprintf (str, "%" PRIdMAX ".%09ld", (intmax_t) t.tv_sec, t.tv_nsec);
+ else
+ sprintf (str, "%" PRIuMAX ".%09ld", (uintmax_t) t.tv_sec, t.tv_nsec);
+ return str;
+}
+
static void
out_string (char *pformat, size_t prefix_len, char const *arg)
{
struct timespec t = get_stat_birthtime (statbuf);
if (t.tv_nsec < 0)
out_string (pformat, prefix_len, "-");
- else if (TYPE_SIGNED (time_t))
- out_int (pformat, prefix_len, t.tv_sec);
else
- out_uint (pformat, prefix_len, t.tv_sec);
+ out_string (pformat, prefix_len, epoch_time (t));
}
break;
case 'x':
out_string (pformat, prefix_len, human_time (get_stat_atime (statbuf)));
break;
case 'X':
- if (TYPE_SIGNED (time_t))
- out_int (pformat, prefix_len, statbuf->st_atime);
- else
- out_uint (pformat, prefix_len, statbuf->st_atime);
+ out_string (pformat, prefix_len, epoch_time (get_stat_atime (statbuf)));
break;
case 'y':
out_string (pformat, prefix_len, human_time (get_stat_mtime (statbuf)));
break;
case 'Y':
- if (TYPE_SIGNED (time_t))
- out_int (pformat, prefix_len, statbuf->st_mtime);
- else
- out_uint (pformat, prefix_len, statbuf->st_mtime);
+ out_string (pformat, prefix_len, epoch_time (get_stat_mtime (statbuf)));
break;
case 'z':
out_string (pformat, prefix_len, human_time (get_stat_ctime (statbuf)));
break;
case 'Z':
- if (TYPE_SIGNED (time_t))
- out_int (pformat, prefix_len, statbuf->st_ctime);
- else
- out_uint (pformat, prefix_len, statbuf->st_ctime);
+ out_string (pformat, prefix_len, epoch_time (get_stat_ctime (statbuf)));
break;
case 'C':
fail |= out_file_context (filename, pformat, prefix_len);