| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* This file is used to define the properties of the filesystem |
| ** images generated by build tools (mkbootfs and mkyaffs2image) and |
| ** by the device side of adb. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| |
| #include <selinux/label.h> |
| #include <selinux/selinux.h> |
| |
| #include "android.h" |
| #include "private/android_filesystem_config.h" |
| |
| #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) |
| |
| void alloc_mounted_path(const char *mount_point, const char *subpath, char **mounted_path) { |
| *mounted_path = malloc(strlen(mount_point) + strlen(subpath) + 1); |
| if (*mounted_path == NULL) { |
| perror("Malloc Failure."); |
| exit(EXIT_FAILURE); |
| } |
| strcpy(*mounted_path, mount_point); |
| strcat(*mounted_path, subpath); |
| } |
| |
| void android_fs_config(const char *path, struct stat *stat, const char *target_out_path) { |
| unsigned long capabilities = 0; |
| fs_config(path, S_ISDIR(stat->st_mode), target_out_path, |
| &stat->st_uid, &stat->st_gid, &stat->st_mode, &capabilities); |
| } |
| |
| |
| struct selabel_handle *get_sehnd(const char *context_file) { |
| struct selinux_opt seopts[] = { |
| { |
| .type = SELABEL_OPT_PATH, |
| .value = context_file |
| } |
| }; |
| struct selabel_handle *sehnd = |
| selabel_open(SELABEL_CTX_FILE, seopts, ARRAY_SIZE(seopts)); |
| |
| if (!sehnd) { |
| perror("Error running selabel_open."); |
| exit(EXIT_FAILURE); |
| } |
| return sehnd; |
| } |
| |
| |
| char *set_selabel(const char *path, unsigned int mode, struct selabel_handle *sehnd) { |
| char *secontext; |
| if (sehnd != NULL) { |
| int full_name_size = strlen(path) + 2; |
| char* full_name = (char*) malloc(full_name_size); |
| if (full_name == NULL) { |
| perror("Malloc Failure."); |
| exit(EXIT_FAILURE); |
| } |
| |
| full_name[0] = '/'; |
| strncpy(full_name + 1, path, full_name_size - 1); |
| |
| if (selabel_lookup(sehnd, &secontext, full_name, mode)) { |
| secontext = strdup("u:object_r:unlabeled:s0"); |
| } |
| |
| free(full_name); |
| return secontext; |
| } |
| perror("Selabel handle is NULL."); |
| exit(EXIT_FAILURE); |
| } |