diff options
Diffstat (limited to 'src/time/asctime_r.c')
| -rw-r--r-- | src/time/asctime_r.c | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/src/time/asctime_r.c b/src/time/asctime_r.c index 7dfbb121..1278311e 100644 --- a/src/time/asctime_r.c +++ b/src/time/asctime_r.c @@ -1,8 +1,31 @@ #include <time.h> +#include <stdio.h> +#include <langinfo.h> +#include "locale_impl.h" +#include "atomic.h" +#include "libc.h" -char *__asctime(const struct tm *restrict, char *restrict); +const char *__nl_langinfo_l(nl_item, locale_t); -char *asctime_r(const struct tm *restrict tm, char *restrict buf) +char *__asctime_r(const struct tm *restrict tm, char *restrict buf) { - return __asctime(tm, buf); + if (snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", + __nl_langinfo_l(ABDAY_1+tm->tm_wday, C_LOCALE), + __nl_langinfo_l(ABMON_1+tm->tm_mon, C_LOCALE), + tm->tm_mday, tm->tm_hour, + tm->tm_min, tm->tm_sec, + 1900 + tm->tm_year) >= 26) + { + /* ISO C requires us to use the above format string, + * even if it will not fit in the buffer. Thus asctime_r + * is _supposed_ to crash if the fields in tm are too large. + * We follow this behavior and crash "gracefully" to warn + * application developers that they may not be so lucky + * on other implementations (e.g. stack smashing..). + */ + a_crash(); + } + return buf; } + +weak_alias(__asctime_r, asctime_r); |