times(2) times(2)
NAME
times - get process and child process times
SYNOPSIS
#include <sys/types.h>
#include <sys/times.h>
clockt times(struct tms *buffer);
DESCRIPTION
times fills the tms structure pointed to by buffer with time-
accounting information. The tms structure is defined in
<sys/times.h> as follows:
struct tms {
clockt tmsutime;
clockt tmsstime;
clockt tmscutime;
clockt tmscstime;
};
This information comes from the calling process and each of its
terminated child processes for which it has executed a wait routine.
All times are reported in clock ticks per second. Clock ticks are a
system-dependent parameter. The specific value for an implementation
is defined by the variable CLKTCK, found in the include file
limits.h.
tmsutime is the CPU time used while executing instructions in the
user space of the calling process.
tmsstime is the CPU time used by the system on behalf of the calling
process.
tmscutime is the sum of the tmsutime and the tmscutime of the
child processes.
tmscstime is the sum of the tmsstime and the tmscstime of the
child processes.
times fails if:
EFAULT buffer points to an illegal address.
SEE ALSO
exec(2), fork(2), time(2), wait(2), waitid(2), waitpid(3C).
time(1), timex(1) in the User's Reference Manual.
DIAGNOSTICS
Upon successful completion, times returns the elapsed real time, in
clock ticks per second, from an arbitrary point in the past (e.g.,
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times(2) times(2)
system start-up time). This point does not change from one
invocation of times to another. If times fails, a -1 is returned and
errno is set to indicate the error.
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