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 14 int getpeercon(int fd, char ** context) 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 46
