OP sistemebi - KOLO KODI

#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/types.h>

/*
 * mshobeli FIFO-shi wers KODS da elodeba shvils!
 * shvili am KODS igebs da debs "test.c" failshi!
 * amis mere mshobeli akompilirebs "test.c" fails!
 */

int main()
{
  printf("[PROGRAM STARTED]\n");

  int pr, status, FIFO, fd;
  char str[] = "#include <stdio.h> #include <stdlib.h> int main() { printf(\"Hello world!\\n\"); return 0; }";
  char str2[92];
  char path[] = "asdf.fifo";
  (void)umask(0);
  FIFO = mknod(path, S_IFIFO | 0754, 0);
  if (FIFO == -1)
  {
    printf("FIFO was not created!\n");
    exit(-1);
  }

  pr = fork();
  if (pr == -1) exit(-1);
  if (pr != 0) // PARENT PROCESS
  {
    printf("[PARENT]:\n");

    fd = open(path, O_WRONLY);
    if (fd == -1) exit(-1);
    if (write(fd, str, sizeof(str)) != sizeof(str)) exit(-1);
    close(fd);

    wait(&status);
    execl("usr/bin/gcc", "gcc", "test.c", "-o", "test.out", NULL);

    printf("[END OF PARENT]\n");
  }
  else // CHILD PROCESS
  {
    printf("[CHILD]:\n");

    fd = open(path, O_RDONLY);
    if (fd == -1)
    {
      printf("FD problem!");
      exit(-1);
    }
    if (read(fd, str2, sizeof(str2)) != sizeof(str2)) exit(-1);
    close(fd);

    (void)umask(0);
    fd = open("test.c", O_WRONLY | O_CREAT, 0756);
    if (fd == -1) exit(-1);
    if (write(fd, str2, sizeof(str2)) != sizeof(str2)) exit(-1);
    close(fd);

    printf("[END OF CHILD]\n");
  }
  printf("[PROGRAM ENDED]\n");
  return 0;
}