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  1. #include <stdio.h>
  2. #include <unistd.h>
  3. #include <stdlib.h>
  4. #include <sys/wait.h>
  5. #include <signal.h>
  6. //----------------------------------------------------------
  7. void signal_handler (int signal)
  8. {
  9.     int   status;
  10.     pid_t pid;
  11.     if (signal == SIGCHLD)
  12.       {
  13.         pid = wait (&status);
  14.         printf ("Il processo %i si è concluso restituendo "
  15.                 "il valore %x.\n",
  16.                 pid, WEXITSTATUS (status));
  17.       }
  18. }
  19. //----------------------------------------------------------
  20. int
  21. main (void)
  22. {
  23.     pid_t  pid;
  24.     //
  25.     signal (SIGCHLD, signal_handler);
  26.     //
  27.     pid = fork ();
  28.     if (pid == 0)
  29.       {
  30.         sleep (1);
  31.         printf ("ciao!\n");
  32.         exit (7);
  33.       }
  34.     printf ("Ho avviato il processo %i.\n", pid);
  35.     //
  36.     sleep (60);
  37.     //
  38.     return (0);
  39. }
Success #stdin #stdout 0.01s 1720KB
comments (?)
stdin
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Standard input is empty
stdout
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ciao!
Ho avviato il processo 20755.
Il processo 20755 si è concluso restituendo il valore 7.
https://ideone.com/JYqHo
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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