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Use signal handlers in time(1) instead of process groups.

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This commit is contained in:
Jonas 'Sortie' Termansen 2015-08-17 23:14:43 +02:00
parent 7d10c4caaa
commit fd5a850e48
1 changed files with 51 additions and 25 deletions
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76
utils/time.cpp
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@ -1,6 +1,6 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
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
@ -25,35 +25,19 @@
#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>
int main(int argc, char* argv[])
{
struct timespec start_time;
clock_gettime(CLOCK_MONOTONIC, &start_time);
pid_t child_pid = fork();
if ( child_pid < 0 )
error(1, errno, "fork");
if ( !child_pid )
{
setpgid(child_pid, child_pid);
tcsetpgrp(0, child_pid);
if ( argc <= 1 )
exit(0);
execvp(argv[1], argv+1);
error(127, errno, "%s", argv[1]);
}
setpgid(child_pid, child_pid);
tcsetpgrp(0, child_pid);
int exit_status = 0;
waitpid(child_pid, &exit_status, 0);
tcsetpgrp(0, getpgid(0));
static pid_t child_pid;
static struct timespec start_time, end_time;
struct timespec end_time;
void statistics(void)
{
clock_gettime(CLOCK_MONOTONIC, &end_time);
struct tmns tmns;
timens(&tmns);
@ -66,6 +50,48 @@ int main(int argc, char* argv[])
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);
return WEXITSTATUS(exit_status);
}
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);
}