1 #include <unistd.h>
2 #include <sys/types.h>
3 #include <fcntl.h>
4 #include <stdlib.h>
5 #include <stdio.h>
6 #include <errno.h>
7 #include <string.h>
8 #include "selinux_internal.h"
9 #include "policy.h"
10 #include <limits.h>
11
12 #define SELINUX_INITCON_DIR "/initial_contexts/"
13
security_get_initial_context_raw(const char * name,char ** con)14 int security_get_initial_context_raw(const char * name, char ** con)
15 {
16 char path[PATH_MAX];
17 char *buf;
18 size_t size;
19 int fd, ret;
20
21 if (!selinux_mnt) {
22 errno = ENOENT;
23 return -1;
24 }
25
26 snprintf(path, sizeof path, "%s%s%s",
27 selinux_mnt, SELINUX_INITCON_DIR, name);
28 fd = open(path, O_RDONLY | O_CLOEXEC);
29 if (fd < 0)
30 return -1;
31
32 size = selinux_page_size;
33 buf = malloc(size);
34 if (!buf) {
35 ret = -1;
36 goto out;
37 }
38 memset(buf, 0, size);
39 ret = read(fd, buf, size - 1);
40 if (ret < 0)
41 goto out2;
42
43 *con = strdup(buf);
44 if (!(*con)) {
45 ret = -1;
46 goto out2;
47 }
48 ret = 0;
49 out2:
50 free(buf);
51 out:
52 close(fd);
53 return ret;
54 }
55
56
security_get_initial_context(const char * name,char ** con)57 int security_get_initial_context(const char * name, char ** con)
58 {
59 int ret;
60 char * rcon;
61
62 ret = security_get_initial_context_raw(name, &rcon);
63 if (!ret) {
64 ret = selinux_raw_to_trans_context(rcon, con);
65 freecon(rcon);
66 }
67
68 return ret;
69 }
70
71