tests/fork/fork.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <sys/types.h>
   4
   5 #include "marker.h"
   6
   7
   8 int main(int argc, char **argv, char *env[])
   9 {
  10         int result;
  11
  12         if(argc < 2 ) {
  13                 fprintf(stderr, "usage: fork PROG_TO_EXEC\n");
  14                 exit(1);
  15         }
  16
  17         printf("Fork test program, parent pid is %d\n", getpid());
  18         trace_mark(ust, before_fork, MARK_NOARGS);
  19
  20         result = fork();
  21         if(result == -1) {
  22                 perror("fork");
  23                 return 1;
  24         }
  25         if(result == 0) {
  26                 char *args[] = {"fork2", NULL};
  27
  28                 printf("Child pid is %d\n", getpid());
  29
  30                 trace_mark(ust, after_fork_child, MARK_NOARGS);
  31
  32                 trace_mark(ust, before_exec, "pid %d", getpid());
  33
  34                 result = execve(argv[1], args, env);
  35                 if(result == -1) {
  36                         perror("execve");
  37                         return 1;
  38                 }
  39
  40                 trace_mark(ust, after_exec, "pid %d", getpid());
  41         }
  42         else {
  43                 trace_mark(ust, after_fork_parent, MARK_NOARGS);
  44         }
  45
  46         return 0;
  47 }
  48
  49 MARKER_LIB;