Linux系统中，与时间相关的API/C库函数

在Linux系统中，常见的与时间相关的API或C库函数如下：

char *asctime(const struct tm *tm);

char *asctime_r(const struct tm *tm, char *buf);

char *ctime(const time_t *timep);

char *ctime_r(const time_t *timep, char *buf);

struct tm *gmtime(const time_t *timep);

struct tm *gmtime_r(const time_t *timep, struct tm *result);

struct tm *localtime(const time_t *timep);
struct tm *localtime_r(const time_t *timep, struct tm *result);

time_t mktime(struct tm *tm);

time_t time(time_t *t);

size_t strftime(char *s, size_t max, const char *format, const struct tm *tm);