Linux man pages : stime (2)
STIME(2) Linux Programmer's Manual STIME(2)
stime - set time
#define _SVID_SOURCE /* glibc2 needs this */
int stime(time_t *t);
stime sets the system's idea of the time and date. Time, pointed to by
t, is measured in seconds from 00:00:00 GMT January 1, 1970. stime()
may only be executed by the super user.
On success, zero is returned. On error, -1 is returned, and errno is
EPERM The caller is not the super-user.
SVr4, SVID, X/OPEN
Under glibc2, <time.h> only provides a prototype when _SVID_SOURCE is
Linux 0.99.11 1993-07-24 STIME(2)