1#include <unistd.h>
2#include <stdio.h>
3#include <stdlib.h>
4#include <string.h>
5#include <errno.h>
6#include <selinux/selinux.h>
7
8int main(int argc, char **argv)
9{
10	pid_t pid;
11	char *buf;
12	int rc;
13
14	if (argc != 2) {
15		fprintf(stderr, "usage:  %s pid\n", argv[0]);
16		exit(1);
17	}
18
19	if (sscanf(argv[1], "%d", &pid) != 1) {
20		fprintf(stderr, "%s:  invalid pid %s\n", argv[0], argv[1]);
21		exit(2);
22	}
23
24	rc = getpidprevcon(pid, &buf);
25	if (rc < 0) {
26		fprintf(stderr, "%s:  getpidprevcon() failed:  %s\n", argv[0], strerror(errno));
27		exit(3);
28	}
29
30	printf("%s\n", buf);
31	freecon(buf);
32	exit(EXIT_SUCCESS);
33}
34