Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame^] | 1 | #include <unistd.h> |
| 2 | #include <fcntl.h> |
| 3 | #include <string.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <errno.h> |
| 6 | #include <sys/xattr.h> |
| 7 | #include "selinux_internal.h" |
| 8 | #include "policy.h" |
| 9 | |
| 10 | int lgetfilecon_raw(const char *path, security_context_t * context) |
| 11 | { |
| 12 | char *buf; |
| 13 | ssize_t size; |
| 14 | ssize_t ret; |
| 15 | |
| 16 | size = INITCONTEXTLEN + 1; |
| 17 | buf = malloc(size); |
| 18 | if (!buf) |
| 19 | return -1; |
| 20 | memset(buf, 0, size); |
| 21 | |
| 22 | ret = lgetxattr(path, XATTR_NAME_SELINUX, buf, size - 1); |
| 23 | if (ret < 0 && errno == ERANGE) { |
| 24 | char *newbuf; |
| 25 | |
| 26 | size = lgetxattr(path, XATTR_NAME_SELINUX, NULL, 0); |
| 27 | if (size < 0) |
| 28 | goto out; |
| 29 | |
| 30 | size++; |
| 31 | newbuf = realloc(buf, size); |
| 32 | if (!newbuf) |
| 33 | goto out; |
| 34 | |
| 35 | buf = newbuf; |
| 36 | memset(buf, 0, size); |
| 37 | ret = lgetxattr(path, XATTR_NAME_SELINUX, buf, size - 1); |
| 38 | } |
| 39 | out: |
| 40 | if (ret == 0) { |
| 41 | /* Re-map empty attribute values to errors. */ |
| 42 | errno = EOPNOTSUPP; |
| 43 | ret = -1; |
| 44 | } |
| 45 | if (ret < 0) |
| 46 | free(buf); |
| 47 | else |
| 48 | *context = buf; |
| 49 | return ret; |
| 50 | } |
| 51 | |
| 52 | hidden_def(lgetfilecon_raw) |
| 53 | |
| 54 | int lgetfilecon(const char *path, security_context_t * context) |
| 55 | { |
| 56 | int ret; |
| 57 | security_context_t rcontext; |
| 58 | |
| 59 | *context = NULL; |
| 60 | |
| 61 | ret = lgetfilecon_raw(path, &rcontext); |
| 62 | |
| 63 | if (ret > 0) { |
| 64 | ret = selinux_raw_to_trans_context(rcontext, context); |
| 65 | freecon(rcontext); |
| 66 | } |
| 67 | |
| 68 | if (ret >= 0 && *context) |
| 69 | return strlen(*context) + 1; |
| 70 | return ret; |
| 71 | } |