tests/fork/fork.c

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