TIMES(2)TIMES(2)NAMEtimes - get process timesSYNOPSIS
#include <sys/types.h>
#include <sys/times.h>
#include <time.h>
int times(struct tms *buffer)
DESCRIPTION
Times returns time-accounting information for the current process and
for the terminated child processes of the current process. All times
are in system clock ticks.
This is the structure returned by times:
struct tms {
clock_t tms_utime; /* user time for this process */
clock_t tms_stime; /* system time for this process */
clock_t tms_cutime; /* children's user time */
clock_t tms_cstime; /* children's system time */
};
The user time is the number of clock ticks used by a process on its own
computations. The system time is the number of clock ticks spent
inside the kernel on behalf of a process. This does not include time
spent waiting for I/O to happen, only actual CPU instruction times.
The children times are the sum of the children's process times and
their children's times.
RETURN
Times returns the number of system clock ticks since boot time on suc‐
cess, otherwise -1 with the error code stored into the global variable
errno. Since -1 is also a valid return value upon success, one should
clear errno before calling this function, and if -1 is returned, check
its value again afterwards.
ERRORS
The following error code may be set in errno:
[EFAULT] The address specified by the buffer parameter is not in
a valid part of the process address space.
SEE ALSOtime(1), wait(2), time(2).
4th Berkeley Distribution May 9, 1985 TIMES(2)
