1#include <time.h>
 2#include <stdio.h>
 3#include <langinfo.h>
 4#include "locale_impl.h"
 5#include "atomic.h"
 6
 7char *__asctime_r(const struct tm *restrict tm, char *restrict buf)
 8{
 9	if (snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
10		__nl_langinfo_l(ABDAY_1+tm->tm_wday, C_LOCALE),
11		__nl_langinfo_l(ABMON_1+tm->tm_mon, C_LOCALE),
12		tm->tm_mday, tm->tm_hour,
13		tm->tm_min, tm->tm_sec,
14		1900 + tm->tm_year) >= 26)
15	{
16		/* ISO C requires us to use the above format string,
17		 * even if it will not fit in the buffer. Thus asctime_r
18		 * is _supposed_ to crash if the fields in tm are too large.
19		 * We follow this behavior and crash "gracefully" to warn
20		 * application developers that they may not be so lucky
21		 * on other implementations (e.g. stack smashing..).
22		 */
23		a_crash();
24	}
25	return buf;
26}
27
28weak_alias(__asctime_r, asctime_r);