minix/tests/test86.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <limits.h>
   4 #include <fcntl.h>
   5 #include <sys/wait.h>
   6
   7 #include "common.h"
   8
   9 /*
  10  * Test for dynamic executables with no read permissions.  This test relies on
  11  * being linked dynamically.
  12  */
  13 int
  14 main(int argc, char ** argv)
  15 {
  16         char *executable, cp_cmd[PATH_MAX + 9];
  17         int status;
  18
  19         if (strcmp(argv[0], "DO CHECK") == 0)
  20                 exit(EXIT_SUCCESS);
  21
  22         start(86);
  23
  24         /* Make a copy of this binary which is executable-only. */
  25         executable = argv[0];
  26
  27         snprintf(cp_cmd, sizeof(cp_cmd), "cp ../%s .", executable);
  28         status = system(cp_cmd);
  29         if (status < 0 || !WIFEXITED(status) ||
  30             WEXITSTATUS(status) != EXIT_SUCCESS) e(0);
  31
  32         if (chmod(executable, S_IXUSR) != 0) e(0);
  33
  34         /* Invoke the changed binary in a child process. */
  35         switch (fork()) {
  36         case -1:
  37                 e(0);
  38         case 0:
  39                 execl(executable, "DO CHECK", NULL);
  40
  41                 exit(EXIT_FAILURE);
  42         default:
  43                 if (wait(&status) <= 0) e(0);
  44                 if (!WIFEXITED(status) || WEXITSTATUS(status) != EXIT_SUCCESS)
  45                         e(0);
  46         }
  47
  48         quit();
  49         /* NOTREACHED */
  50 }