1#include <unistd.h>
2#include <sys/types.h>
3#include <fcntl.h>
4#include <stdio.h>
5#include <stdlib.h>
6#include <errno.h>
7#include <string.h>
8#include <ctype.h>
9#include <selinux/selinux.h>
10#include <selinux/get_context_list.h>
11
12static __attribute__ ((__noreturn__)) void usage(const char *name, const char *detail, int rc)
13{
14	fprintf(stderr, "usage:  %s [-l level] user [context]\n", name);
15	if (detail)
16		fprintf(stderr, "%s:  %s\n", name, detail);
17	exit(rc);
18}
19
20int main(int argc, char **argv)
21{
22	char **list, *cur_context = NULL;
23	char *user = NULL, *level = NULL;
24	int ret, i, opt;
25
26	while ((opt = getopt(argc, argv, "l:")) > 0) {
27		switch (opt) {
28		case 'l':
29			free(level);
30			level = strdup(optarg);
31			if (!level) {
32				fprintf(stderr, "memory allocation failure: %d(%s)\n",
33					errno, strerror(errno));
34				return 3;
35			}
36			break;
37		default:
38			usage(argv[0], "invalid option", 1);
39		}
40	}
41
42	if (((argc - optind) < 1) || ((argc - optind) > 2))
43		usage(argv[0], "invalid number of arguments", 2);
44
45	/* If selinux isn't available, bail out. */
46	if (!is_selinux_enabled()) {
47		fprintf(stderr,
48			"getconlist may be used only on a SELinux kernel.\n");
49		free(level);
50		return 1;
51	}
52
53	user = argv[optind];
54
55	/* If a context wasn't passed, use the current context. */
56	if (((argc - optind) < 2)) {
57		if (getcon(&cur_context) < 0) {
58			fprintf(stderr, "Couldn't get current context:  %s\n", strerror(errno));
59			free(level);
60			return 2;
61		}
62	} else {
63		cur_context = argv[optind + 1];
64		if (security_check_context(cur_context) != 0) {
65			fprintf(stderr, "Given context '%s' is invalid.\n", cur_context);
66			free(level);
67			return 3;
68		}
69	}
70
71	/* Get the list and print it */
72	if (level)
73		ret =
74		    get_ordered_context_list_with_level(user, level,
75							cur_context, &list);
76	else
77		ret = get_ordered_context_list(user, cur_context, &list);
78	if (ret != -1) {
79		for (i = 0; list[i]; i++)
80			puts(list[i]);
81		freeconary(list);
82	} else {
83		fprintf(stderr, "get_ordered_context_list%s failure: %d(%s)\n",
84			level ? "_with_level" : "", errno, strerror(errno));
85		free(level);
86		return 4;
87	}
88
89	free(level);
90
91	return 0;
92}
93