98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*******************************************************************************
|
|
|
|
Copyright(C) Jonas 'Sortie' Termansen 2013, 2015.
|
|
|
|
This program is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the Free
|
|
Software Foundation, either version 3 of the License, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
time.c
|
|
Measure process running time.
|
|
|
|
*******************************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <errno.h>
|
|
#include <error.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <timespec.h>
|
|
#include <unistd.h>
|
|
|
|
static pid_t child_pid;
|
|
static struct timespec start_time, end_time;
|
|
|
|
void statistics(void)
|
|
{
|
|
clock_gettime(CLOCK_MONOTONIC, &end_time);
|
|
struct tmns tmns;
|
|
timens(&tmns);
|
|
struct timespec real_time = timespec_sub(end_time, start_time);
|
|
struct timespec execute_time = timespec_sub(tmns.tmns_cutime, tmns.tmns_utime);
|
|
struct timespec system_time = timespec_sub(tmns.tmns_cstime, tmns.tmns_stime);
|
|
struct timespec user_time = timespec_sub(execute_time, system_time);
|
|
|
|
fprintf(stderr, "\n");
|
|
fprintf(stderr, "real\t%lim%li.%03li\n", (long) real_time.tv_sec / 60, (long) real_time.tv_sec % 60, real_time.tv_nsec / 1000000L);
|
|
fprintf(stderr, "user\t%lim%li.%03li\n", (long) user_time.tv_sec / 60, (long) user_time.tv_sec % 60, user_time.tv_nsec / 1000000);
|
|
fprintf(stderr, "sys\t%lim%li.%03li\n", (long) system_time.tv_sec / 60, (long) system_time.tv_sec % 60, system_time.tv_nsec / 1000000);
|
|
}
|
|
|
|
void signal_handler(int signum)
|
|
{
|
|
int code;
|
|
waitpid(child_pid, &code, 0);
|
|
statistics();
|
|
raise(signum);
|
|
_exit(1);
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
clock_gettime(CLOCK_MONOTONIC, &start_time);
|
|
sigset_t handleset, oldset;
|
|
sigemptyset(&handleset);
|
|
sigaddset(&handleset, SIGINT);
|
|
sigaddset(&handleset, SIGQUIT);
|
|
sigprocmask(SIG_BLOCK, &handleset, &oldset);
|
|
if ( (child_pid = fork()) < 0 )
|
|
error(1, errno, "fork");
|
|
if ( !child_pid )
|
|
{
|
|
sigprocmask(SIG_SETMASK, &oldset, NULL);
|
|
if ( argc <= 1 )
|
|
exit(0);
|
|
execvp(argv[1], argv+1);
|
|
error(127, errno, "%s", argv[1]);
|
|
}
|
|
struct sigaction sa;
|
|
memset(&sa, 0, sizeof(sa));
|
|
sa.sa_handler = signal_handler;
|
|
sa.sa_flags = SA_RESETHAND;
|
|
sigaction(SIGINT, &sa, NULL);
|
|
sigaction(SIGQUIT, &sa, NULL);
|
|
int code = 0;
|
|
sigprocmask(SIG_SETMASK, &oldset, NULL);
|
|
waitpid(child_pid, &code, 0);
|
|
signal(SIGINT, SIG_DFL);
|
|
signal(SIGQUIT, SIG_DFL);
|
|
statistics();
|
|
if ( WIFSIGNALED(code) )
|
|
raise(WTERMSIG(code));
|
|
return WEXITSTATUS(code);
|
|
}
|