| Stephen Smalley | f074036 | 2012-01-04 12:30:47 -0500 | [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/socket.h> |
| 7 | #include "selinux_internal.h" |
| 8 | #include "policy.h" |
| 9 | |
| 10 | #ifndef SO_PEERSEC |
| 11 | #define SO_PEERSEC 31 |
| 12 | #endif |
| 13 | |
| Stephen Smalley | ab40ea9 | 2014-02-19 09:16:17 -0500 | [diff] [blame] | 14 | int getpeercon(int fd, char ** context) |
| Stephen Smalley | f074036 | 2012-01-04 12:30:47 -0500 | [diff] [blame] | 15 | { |
| 16 | char *buf; |
| 17 | socklen_t size; |
| 18 | ssize_t ret; |
| 19 | |
| 20 | size = INITCONTEXTLEN + 1; |
| 21 | buf = malloc(size); |
| 22 | if (!buf) |
| 23 | return -1; |
| 24 | memset(buf, 0, size); |
| 25 | |
| 26 | ret = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, buf, &size); |
| 27 | if (ret < 0 && errno == ERANGE) { |
| 28 | char *newbuf; |
| 29 | |
| 30 | newbuf = realloc(buf, size); |
| 31 | if (!newbuf) |
| 32 | goto out; |
| 33 | |
| 34 | buf = newbuf; |
| 35 | memset(buf, 0, size); |
| 36 | ret = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, buf, &size); |
| 37 | } |
| 38 | out: |
| 39 | if (ret < 0) |
| 40 | free(buf); |
| 41 | else |
| 42 | *context = buf; |
| 43 | return ret; |
| 44 | } |
| 45 | |