Tv_t¶

contains these elements:

unsigned

_ast_int4_t tv_sec Seconds since the epoch.

unsigned

_ast_int4_t tv_nsec Nanosecond resolution.

In practice resolution is much coarser than 1 nanosecond. Systems that only support 1 second resolution always set tv_nsec to 0.

int tvgettime(Tv_t* tv)¶

Sets tv to the current time. 0 is returned on success, -1 on error.

int tvsettime(const Tv_t* tv)¶

Sets the system time to tv. The caller must have sufficient privilege. 0 is returned on success, -1 on error.

int tvcmp(const Tv_t* av, const Tv_t* bv)¶

Compares the times av and bv and returns -1 if av is less than bv, 0 if av is equal to bv, and 1 if av is greater than bv.

time_t tvgetatime(Tv_t* tv, const struct stat* st)¶

time_t tvgetmtime(Tv_t* tv, const struct stat* st)¶

time_t tvgetctime(Tv_t* tv, const struct stat* st)¶

These macros set tv to the st the access, modify, or change time, respectively. The seconds portion of tv is returned.

time_t tvsetatime(Tv_t* tv, struct stat* st)¶

time_t tvsetmtime(Tv_t* tv, struct stat* st)¶

time_t tvsetctime(Tv_t* tv, struct stat* st)¶

These macros set the st access, modify, or change time, respectively, to tv. The seconds portion of tv is returned.

int tvtouch(const char* path, const Tv_t* av, const Tv_t* mv, const Tv_t* cv, int copy)¶

Sets the file path access time from av, modify time from mv, and change time from cv. Any of av, mv, and cv may be 0; the corresponding file time will retain the previous value if path exists and copy is 1; otherwise the corresponding file time will be set to the current time. 0 is returned on success, -1 on error.

int tvsleep(const Tv_t* tv, Tv_t* rv)¶

Pauses execution for tv time. 0 is returned if the full tv amount has expired. Otherwise -1 is returned and rv, if not 0, is set to the sleep time remaining.