test/clib/vfork.c

   1 #include <unistd.h>
   2 #include <stdio.h>
   3 #include <aros/debug.h>
   4 #include <sys/wait.h>
   5 #include "test.h"
   6
   7 int main()
   8 {
   9     pid_t pid;
  10     int retval = RETURN_OK;
  11
  12     pid = vfork();
  13     if((int) pid > 0)
  14     {
  15         int status = -1;
  16         printf("I'm parent, I have a child with pid %d\n", (int) pid);
  17         waitpid(pid, &status, 0);
  18         if (status != 1)
  19             return RETURN_FAIL;
  20     }
  21     else if(pid == 0)
  22     {
  23         // Only _exit() and exec*() are valid in child context
  24         _exit(1);
  25     }
  26     else
  27     {
  28         TEST(0);
  29     }
  30
  31     pid = vfork();
  32     if((int) pid > 0)
  33     {
  34         printf("I'm parent, I have a first child with pid %d\n", (int) pid);
  35         pid_t pid2 = vfork();
  36         if((int) pid2 > 0)
  37         {
  38             int status = -1;
  39             printf("I'm parent, I have a second child with pid %d\n", (int) pid2);
  40             waitpid(pid2, &status, 0);
  41             if (status != 2)
  42                 return RETURN_FAIL;
  43         }
  44         else if(pid2 == 0)
  45         {
  46             // Only _exit(), vfork(), and exec*() are valid in child context
  47             _exit(2);
  48         }
  49         waitpid(pid, NULL, 0);
  50     }
  51     else if(pid == 0)
  52     {
  53         pid_t pid2 = vfork();
  54         int retval = 3;
  55         if((int) pid2 > 0)
  56         {
  57             // I'm child, I have my child with pid2
  58             int status = -1;
  59             waitpid(pid2, &status, 0);
  60             if (status != 4)
  61                 retval = RETURN_FAIL;
  62         }
  63         else if(pid2 == 0)
  64         {
  65             // I am the child of a child
  66             _exit(4);
  67         }
  68         _exit(retval);
  69     }
  70     else
  71     {
  72         TEST(0);
  73     }
  74
  75     return retval;
  76 }
  77
  78 void cleanup()
  79 {
  80 }