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