ctime_r - thread-safe conversion of date and time to string

Syntax	#include <time.h> char *ctime_r(const time_t *clock, char *buf); char *ctime64_r(const tim64e_t *clock, char *buf);
Description	ctime_r() and ctime_r() convert the time specified by clock to the same format as ctime() ctime64()and writes the result to the data area pointed to by buf (at least 26 bytes).
Return val.	Pointer to the string pointed to by buf,
		if successful.
	Null pointer	if an error occurs. errno is set to indicate the error.
See also	asctime(), asctime_r(), ctime(), localtime(), localtime_r(), time().