1 #include <unistd.h> 2 #include <fcntl.h> 3 #include <string.h> 4 #include "selinux_internal.h" 5 #include <stdlib.h> 6 #include <errno.h> 7 #include <limits.h> 8 #include <stdio.h> 9 #include "policy.h" 10 11 int is_selinux_enabled(void) 12 { 13 /* init_selinuxmnt() gets called before this function. We 14 * will assume that if a selinux file system is mounted, then 15 * selinux is enabled. */ 16 #ifdef ANDROID 17 return (selinux_mnt ? 1 : 0); 18 #else 19 return (selinux_mnt && has_selinux_config); 20 #endif 21 } 22 23 hidden_def(is_selinux_enabled) 24 25 /* 26 * Function: is_selinux_mls_enabled() 27 * Return: 1 on success 28 * 0 on failure 29 */ 30 int is_selinux_mls_enabled(void) 31 { 32 char buf[20], path[PATH_MAX]; 33 int fd, ret, enabled = 0; 34 35 if (!selinux_mnt) 36 return enabled; 37 38 snprintf(path, sizeof path, "%s/mls", selinux_mnt); 39 fd = open(path, O_RDONLY | O_CLOEXEC); 40 if (fd < 0) 41 return enabled; 42 43 memset(buf, 0, sizeof buf); 44 45 do { 46 ret = read(fd, buf, sizeof buf - 1); 47 } while (ret < 0 && errno == EINTR); 48 close(fd); 49 if (ret < 0) 50 return enabled; 51 52 if (!strcmp(buf, "1")) 53 enabled = 1; 54 55 return enabled; 56 } 57 58 hidden_def(is_selinux_mls_enabled) 59
