SCR/SCR3.1/TP5/ex1.2.c

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2023-10-05 23:12:01 +02:00
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
int main(int argc, char** argv){
if (argc != 2){
printf("Usage : %s <file>", argv[0]);
exit(EXIT_FAILURE);
}
pid_t p;
int pip, fd[2], outfile, d;
char buf;
pip = pipe(fd);
if (pip == -1){
perror("Erreur lors de la création du pipe.");
exit(EXIT_FAILURE);
}
p = fork();
outfile = open(argv[1], O_WRONLY|O_CREAT, 0644);
switch(p){
case 0 :
close(fd[0]);
d = dup2(fd[1], 1);
execl("/usr/bin/ls", "ls", "-i", "-l", "/tmp", NULL);
close(fd[1]);
exit(0);
default :
close(fd[1]);
while(read(fd[0], &buf, sizeof(char)) > 0){
write(outfile, &buf, sizeof(char));
}
break;
case -1:
perror("Erreur lors de création d'un nouveau processus");
exit(EXIT_FAILURE);
}
close(outfile);
return EXIT_SUCCESS;
}