2 * Copyright (C) 2014 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
23 #include "canned_fs_config.h"
30 uint64_t capabilities;
33 static Path* canned_data = NULL;
34 static int canned_alloc = 0;
35 static int canned_used = 0;
37 static int path_compare(const void* a, const void* b) {
38 return strcmp(((Path*)a)->path, ((Path*)b)->path);
41 int load_canned_fs_config(const char* fn) {
42 FILE* f = fopen(fn, "r");
44 fprintf(stderr, "failed to open %s: %s\n", fn, strerror(errno));
48 char line[PATH_MAX + 200];
49 while (fgets(line, sizeof(line), f)) {
50 while (canned_used >= canned_alloc) {
51 canned_alloc = (canned_alloc+1) * 2;
52 canned_data = (Path*) realloc(canned_data, canned_alloc * sizeof(Path));
54 Path* p = canned_data + canned_used;
55 p->path = strdup(strtok(line, " \t"));
57 if (!p->path || !*p->path || *p->path == '#')
60 p->uid = atoi(strtok(NULL, " \t"));
61 p->gid = atoi(strtok(NULL, " \t"));
62 p->mode = strtol(strtok(NULL, " \t"), NULL, 8); // mode is in octal
67 token = strtok(NULL, " \t");
68 if (token && strncmp(token, "capabilities=", 13) == 0) {
69 p->capabilities = strtoll(token+13, NULL, 0);
79 qsort(canned_data, canned_used, sizeof(Path), path_compare);
80 printf("loaded %d fs_config entries\n", canned_used);
85 int canned_fs_config(const char* path, int dir,
86 unsigned* uid, unsigned* gid, unsigned* mode, uint64_t* capabilities) {
89 Path* p = (Path*) bsearch(&key, canned_data, canned_used, sizeof(Path), path_compare);
96 *capabilities = p->capabilities;
99 // for debugging, run the built-in fs_config and compare the results.
101 unsigned c_uid, c_gid, c_mode;
102 uint64_t c_capabilities;
103 fs_config(path, dir, &c_uid, &c_gid, &c_mode, &c_capabilities);
105 if (c_uid != *uid) printf("%s uid %d %d\n", path, *uid, c_uid);
106 if (c_gid != *gid) printf("%s gid %d %d\n", path, *gid, c_gid);
107 if (c_mode != *mode) printf("%s mode 0%o 0%o\n", path, *mode, c_mode);
108 if (c_capabilities != *capabilities) printf("%s capabilities %llx %llx\n", path, *capabilities, c_capabilities);