memcheck/tests/linux/capget.c

   1 #if defined(linux)
   2
   3
   4 #include <stdio.h>            /* printf() */
   5 #include <unistd.h>           /* syscall() */
   6 #include <sys/syscall.h>      /* __NR_capget */
   7 #include <sys/types.h>        /* uid_t */
   8 #include <linux/capability.h> /* _LINUX_CAPABILITY_VERSION */
   9
  10
  11 int main()
  12 {
  13   struct __user_cap_header_struct h;
  14   struct __user_cap_data_struct d;
  15   int syscall_result;
  16
  17   if (getuid() == 0)
  18     fprintf(stderr, "Running as root\n");
  19   h.version = _LINUX_CAPABILITY_VERSION;
  20   h.pid = 0;
  21   syscall_result = syscall(__NR_capget, &h, &d);
  22   if (syscall_result >= 0)
  23   {
  24     fprintf(stderr,
  25             "capget result:\n"
  26             "effective   %#x\n"
  27             "permitted   %#x\n"
  28             "inheritable %#x\n",
  29             d.effective,
  30             d.permitted,
  31             d.inheritable);
  32   }
  33   else
  34   {
  35     perror("capget");
  36   }
  37   return 0;
  38 }
  39
  40
  41 #else
  42
  43
  44 #include <stdio.h>
  45
  46 int main()
  47 {
  48   fprintf(stderr, "This program is Linux-specific\n");
  49   return 0;
  50 }
  51
  52
  53 #endif