Implementation status: implemented
char *ctime(const time_t *clock);
char *ctime_r(const time_t *clock, char *buf);
ctime() function converts the time pointed to by clock, representing time in seconds since the Epoch, to local time in the form of a string. It is equivalent to:
clock - time in seconds since the Epoch.
buf - the buffer to which the string representing local time is put.
ctime() function returns value in an array of characters. It is not thread-safe.
ctime_r() function converts the calendar time pointed to by clock to local time in exactly the same form as
ctime() and puts the string into the 32 bytes array pointed to by buf. It returns buf.
ctime_r() function does not set
These functions are included only for compatibility with older implementations. They have undefined behavior if the resulting string is too long, so the use of them is discouraged. Also, these functions do not support localized date and time formats. To avoid these problems, applications should use
strftime() to generate strings from broken-down times.
Values for the broken-down time structure can be obtained by calling
ctime_r() function is thread-safe and returns values in a user-supplied buffer instead of possibly using a static data area that may be overwritten by each call.
Attempts to use
ctime_r() for times before the Epoch or for times beyond the year
9999 produce undefined results. Refer to
These functions may be removed in a future version.
ctime() function returns the pointer returned by
asctime() with that broken-down time as an argument.
Upon successful completion,
ctime_r() returns a pointer to the string pointed to by buf. When an error is encountered, a null pointer is returned.
No errors are defined.
- Add environment parsing for setting timezone and daylight.