1 /* matchpathcon - get the default security context for the specified
2 * path from the file contexts configuration.
3 * based on libselinux-1.32
4 * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
5 *
6 * Licensed under GPLv2, see file LICENSE in this source tree.
7 */
8 //config:config MATCHPATHCON
9 //config: bool "matchpathcon"
10 //config: default n
11 //config: depends on SELINUX
12 //config: help
13 //config: Enable support to get default security context of the
14 //config: specified path from the file contexts configuration.
15
16 //applet:IF_MATCHPATHCON(APPLET(matchpathcon, BB_DIR_USR_SBIN, BB_SUID_DROP))
17
18 //kbuild:lib-$(CONFIG_MATCHPATHCON) += matchpathcon.o
19
20 //usage:#define matchpathcon_trivial_usage
21 //usage: "[-n] [-N] [-f file_contexts_file] [-p prefix] [-V]"
22 //usage:#define matchpathcon_full_usage "\n\n"
23 //usage: " -n Don't display path"
24 //usage: "\n -N Don't use translations"
25 //usage: "\n -f Use alternate file_context file"
26 //usage: "\n -p Use prefix to speed translations"
27 //usage: "\n -V Verify file context on disk matches defaults"
28
29 #include "libbb.h"
30
print_matchpathcon(char * path,int noprint)31 static int print_matchpathcon(char *path, int noprint)
32 {
33 char *buf;
34 int rc = matchpathcon(path, 0, &buf);
35 if (rc < 0) {
36 bb_perror_msg("matchpathcon(%s) failed", path);
37 return 1;
38 }
39 if (!noprint)
40 printf("%s\t%s\n", path, buf);
41 else
42 puts(buf);
43
44 freecon(buf);
45 return 0;
46 }
47
48 #define OPT_NOT_PRINT (1<<0) /* -n */
49 #define OPT_NOT_TRANS (1<<1) /* -N */
50 #define OPT_FCONTEXT (1<<2) /* -f */
51 #define OPT_PREFIX (1<<3) /* -p */
52 #define OPT_VERIFY (1<<4) /* -V */
53
54 int matchpathcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
matchpathcon_main(int argc UNUSED_PARAM,char ** argv)55 int matchpathcon_main(int argc UNUSED_PARAM, char **argv)
56 {
57 int error = 0;
58 unsigned opts;
59 char *fcontext, *prefix, *path;
60
61 opt_complementary = "-1" /* at least one param reqd */
62 ":?:f--p:p--f"; /* mutually exclusive */
63 opts = getopt32(argv, "nNf:p:V", &fcontext, &prefix);
64 argv += optind;
65
66 if (opts & OPT_NOT_TRANS) {
67 set_matchpathcon_flags(MATCHPATHCON_NOTRANS);
68 }
69 if (opts & OPT_FCONTEXT) {
70 if (matchpathcon_init(fcontext))
71 bb_perror_msg_and_die("error while processing %s", fcontext);
72 }
73 if (opts & OPT_PREFIX) {
74 if (matchpathcon_init_prefix(NULL, prefix))
75 bb_perror_msg_and_die("error while processing %s", prefix);
76 }
77
78 while ((path = *argv++) != NULL) {
79 security_context_t con;
80 int rc;
81
82 if (!(opts & OPT_VERIFY)) {
83 error += print_matchpathcon(path, opts & OPT_NOT_PRINT);
84 continue;
85 }
86
87 if (selinux_file_context_verify(path, 0)) {
88 printf("%s verified\n", path);
89 continue;
90 }
91
92 if (opts & OPT_NOT_TRANS)
93 rc = lgetfilecon_raw(path, &con);
94 else
95 rc = lgetfilecon(path, &con);
96
97 if (rc >= 0) {
98 printf("%s has context %s, should be ", path, con);
99 error += print_matchpathcon(path, 1);
100 freecon(con);
101 continue;
102 }
103 printf("actual context unknown: %s, should be ", strerror(errno));
104 error += print_matchpathcon(path, 1);
105 }
106 matchpathcon_fini();
107 return error;
108 }
109