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 8 char *__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 29 weak_alias(__asctime_r, asctime_r); 30 31