Stephen Smalley | f074036 | 2012-01-04 12:30:47 -0500 | [diff] [blame] | 1 | #include <unistd.h> |
| 2 | #include <sys/types.h> |
| 3 | #include <fcntl.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <errno.h> |
| 6 | #include <string.h> |
| 7 | #include "selinux_internal.h" |
| 8 | #include <stdio.h> |
| 9 | #include "policy.h" |
| 10 | #include "dso.h" |
| 11 | #include <limits.h> |
| 12 | |
| 13 | int security_policyvers(void) |
| 14 | { |
| 15 | int fd, ret; |
| 16 | char path[PATH_MAX]; |
| 17 | char buf[20]; |
| 18 | unsigned vers = DEFAULT_POLICY_VERSION; |
| 19 | |
| 20 | if (!selinux_mnt) { |
| 21 | errno = ENOENT; |
| 22 | return -1; |
| 23 | } |
| 24 | |
| 25 | snprintf(path, sizeof path, "%s/policyvers", selinux_mnt); |
| 26 | fd = open(path, O_RDONLY); |
| 27 | if (fd < 0) { |
| 28 | if (errno == ENOENT) |
| 29 | return vers; |
| 30 | else |
| 31 | return -1; |
| 32 | } |
| 33 | memset(buf, 0, sizeof buf); |
| 34 | ret = read(fd, buf, sizeof buf - 1); |
| 35 | close(fd); |
| 36 | if (ret < 0) |
| 37 | return -1; |
| 38 | |
| 39 | if (sscanf(buf, "%u", &vers) != 1) |
| 40 | return -1; |
| 41 | |
| 42 | return vers; |
| 43 | } |
| 44 | |
| 45 | hidden_def(security_policyvers) |