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
11int 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
46int main()
47{
48  fprintf(stderr, "This program is Linux-specific\n");
49  return 0;
50}
51
52
53#endif
54