POSIX_C_LANG_SUPPORT_R

POSIX C Language Support (reentrant) option group. More...

Functions
char *	asctime_r (const struct tm *ZRESTRICT tm, char *ZRESTRICT buf)
	Convert broken-down time to a string (thread-safe version of asctime()).
char *	ctime_r (const time_t *clock, char *buf)
	Convert a time_t to a string (thread-safe version of ctime()).
struct tm *	gmtime_r (const time_t *ZRESTRICT timer, struct tm *ZRESTRICT result)
	Convert a time_t to UTC broken-down time (thread-safe version of gmtime()).
struct tm *	localtime_r (const time_t *ZRESTRICT timer, struct tm *ZRESTRICT result)
	Convert a time_t to local broken-down time (thread-safe version of localtime()).

Detailed Description

POSIX C Language Support (reentrant) option group.

Function Documentation

asctime_r()

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

Convert broken-down time to a string (thread-safe version of asctime()).

Parameters

tm	Broken-down time.
buf	Caller-supplied buffer of at least 26 bytes.

Returns

buf on success, or NULL on failure.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/asctime_r.html

ctime_r()

char * ctime_r	(	const time_t *	clock,
		char *	buf
	)

Convert a time_t to a string (thread-safe version of ctime()).

Parameters

clock	Pointer to a time_t value.
buf	Caller-supplied buffer of at least 26 bytes.

Returns

buf on success, or NULL on failure.

See also

https://pubs.opengroup.org/onlinepubs/9699919799/functions/ctime_r.html

gmtime_r()

struct tm * gmtime_r	(	const time_t *ZRESTRICT	timer,
		struct tm *ZRESTRICT	result
	)

Convert a time_t to UTC broken-down time (thread-safe version of gmtime()).

Parameters

timer	Pointer to the time_t value.
result	Caller-supplied storage for the result.

Returns

result on success, or NULL on failure.

localtime_r()

struct tm * localtime_r	(	const time_t *ZRESTRICT	timer,
		struct tm *ZRESTRICT	result
	)

Convert a time_t to local broken-down time (thread-safe version of localtime()).

Parameters

timer	Pointer to the time_t value.
result	Caller-supplied storage for the result.

Returns

result on success, or NULL on failure.