1#include <time.h>
2#include <stdio.h>
3#include <langinfo.h>
4#include "locale_impl.h"
5#include "time_impl.h"
6#include "atomic.h"
7
8char *__asctime_r(const struct tm *restrict tm, char *restrict buf)
9{
10	if (snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
11		__nl_langinfo_l(ABDAY_1+tm->tm_wday, C_LOCALE),
12		__nl_langinfo_l(ABMON_1+tm->tm_mon, C_LOCALE),
13		tm->tm_mday, tm->tm_hour,
14		tm->tm_min, tm->tm_sec,
15		1900 + tm->tm_year) >= 26)
16	{
17		/* ISO C requires us to use the above format string,
18		 * even if it will not fit in the buffer. Thus asctime_r
19		 * is _supposed_ to crash if the fields in tm are too large.
20		 * We follow this behavior and crash "gracefully" to warn
21		 * application developers that they may not be so lucky
22		 * on other implementations (e.g. stack smashing..).
23		 */
24		a_crash();
25	}
26	return buf;
27}
28
29weak_alias(__asctime_r, asctime_r);
30
31