TD2/exercise2/exercise.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <fcntl.h>
   4 #include <unistd.h>
   5
   6 #include <sys/types.h>
   7 #include <sys/stat.h>
   8
   9 int main() {
  10     int out_file_fd = open("ouput.txt", O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
  11     if (out_file_fd < 0) {
  12         perror("open failure\n");
  13         exit(EXIT_FAILURE);
  14     }
  15
  16     dup2(out_file_fd, STDOUT_FILENO);
  17
  18     execl("/bin/ls", "ls", (char*)NULL);
  19
  20     close(out_file_fd);
  21
  22     return EXIT_SUCCESS;
  23 }