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#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <sys/signal.h>
void erreur(char *s);
void suite(int n){};
int main(int argc, char ** argv)
{
int temp, fd0, fd1, fd2, pid;
if((fd0 = open("/dev/null", O_RDONLY)) == -1) erreur("Ouverture fichier null");
if((fd1 = open("nohup.out", O_WRONLY | O_CREAT | O_TRUNC, 0666)) == -1 ) erreur("Ouverture fichier nohup.out");
if((fd2 = open("nohup.err", O_WRONLY | O_CREAT | O_TRUNC, 0666)) == -1 ) erreur("Ouverture fichier nohup.err");
pid = fork();
if(pid == 0)
{
signal(SIGHUP, SIG_IGN);
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
close(0); dup(fd0);
close(1); dup(fd1);
close(2); dup(fd2);
temp = atoi(argv[1]);
signal(SIGALRM, suite);
alarm(temp);
pause();
execvp(argv[2], argv + 2);
erreur("Le programme n'a pas fonctionné correctement");
exit(-1);
}
printf("PID fils : %d\n", pid);
}
void erreur(char *s)
{
perror(s);
exit(-2);
}