Mohamad Ayyash | 829ffbe | 2015-02-24 13:04:49 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | /* This file is used to define the properties of the filesystem |
| 18 | ** images generated by build tools (mkbootfs and mkyaffs2image) and |
| 19 | ** by the device side of adb. |
| 20 | */ |
Mohamad Ayyash | 829ffbe | 2015-02-24 13:04:49 -0800 | [diff] [blame] | 21 | |
Mohamad Ayyash | e031629 | 2015-02-24 19:21:29 -0800 | [diff] [blame] | 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <sys/stat.h> |
| 26 | |
| 27 | #include <selinux/android.h> |
| 28 | #include <selinux/label.h> |
| 29 | #include <selinux/selinux.h> |
| 30 | |
| 31 | #include "android.h" |
| 32 | #include "private/android_filesystem_config.h" |
| 33 | |
| 34 | #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) |
| 35 | |
Mohamad Ayyash | 18fe5f6 | 2015-03-02 16:00:56 -0800 | [diff] [blame] | 36 | void alloc_mounted_path(const char *mount_point, const char *subpath, char **mounted_path) { |
| 37 | *mounted_path = malloc(strlen(mount_point) + strlen(subpath) + 1); |
| 38 | if (*mounted_path == NULL) { |
| 39 | perror("Malloc Failure."); |
| 40 | exit(EXIT_FAILURE); |
| 41 | } |
| 42 | strcpy(*mounted_path, mount_point); |
| 43 | strcat(*mounted_path, subpath); |
| 44 | } |
| 45 | |
Thierry Strudel | 1a710ff | 2015-07-09 16:34:38 -0700 | [diff] [blame] | 46 | void android_fs_config(const char *path, struct stat *stat, const char *target_out_path) { |
Mohamad Ayyash | 829ffbe | 2015-02-24 13:04:49 -0800 | [diff] [blame] | 47 | unsigned long capabilities = 0; |
Thierry Strudel | 1a710ff | 2015-07-09 16:34:38 -0700 | [diff] [blame] | 48 | fs_config(path, S_ISDIR(stat->st_mode), target_out_path, |
| 49 | &stat->st_uid, &stat->st_gid, &stat->st_mode, &capabilities); |
Mohamad Ayyash | 829ffbe | 2015-02-24 13:04:49 -0800 | [diff] [blame] | 50 | } |
| 51 | |
Mohamad Ayyash | e031629 | 2015-02-24 19:21:29 -0800 | [diff] [blame] | 52 | |
| 53 | struct selabel_handle *get_sehnd(const char *context_file) { |
| 54 | struct selinux_opt seopts[] = { |
| 55 | { |
| 56 | .type = SELABEL_OPT_PATH, |
| 57 | .value = context_file |
| 58 | } |
| 59 | }; |
| 60 | struct selabel_handle *sehnd = |
| 61 | selabel_open(SELABEL_CTX_FILE, seopts, ARRAY_SIZE(seopts)); |
| 62 | |
| 63 | if (!sehnd) { |
| 64 | perror("Error running selabel_open."); |
| 65 | exit(EXIT_FAILURE); |
| 66 | } |
| 67 | return sehnd; |
| 68 | } |
| 69 | |
| 70 | |
| 71 | char *set_selabel(const char *path, unsigned int mode, struct selabel_handle *sehnd) { |
| 72 | char *secontext; |
| 73 | if (sehnd != NULL) { |
| 74 | int full_name_size = strlen(path) + 2; |
| 75 | char* full_name = (char*) malloc(full_name_size); |
| 76 | if (full_name == NULL) { |
| 77 | perror("Malloc Failure."); |
| 78 | exit(EXIT_FAILURE); |
| 79 | } |
| 80 | |
| 81 | full_name[0] = '/'; |
| 82 | strncpy(full_name + 1, path, full_name_size - 1); |
| 83 | |
| 84 | if (selabel_lookup(sehnd, &secontext, full_name, mode)) { |
| 85 | secontext = strdup("u:object_r:unlabeled:s0"); |
| 86 | } |
| 87 | |
| 88 | free(full_name); |
| 89 | return secontext; |
| 90 | } |
| 91 | perror("Selabel handle is NULL."); |
| 92 | exit(EXIT_FAILURE); |
| 93 | } |