--- /dev/null
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include "private/android_filesystem_config.h"
+
+#include "canned_fs_config.h"
+
+typedef struct {
+ const char* path;
+ unsigned uid;
+ unsigned gid;
+ unsigned mode;
+ uint64_t capabilities;
+} Path;
+
+static Path* canned_data = NULL;
+static int canned_alloc = 0;
+static int canned_used = 0;
+
+static int path_compare(const void* a, const void* b) {
+ return strcmp(((Path*)a)->path, ((Path*)b)->path);
+}
+
+int load_canned_fs_config(const char* fn) {
+ FILE* f = fopen(fn, "r");
+ if (f == NULL) {
+ fprintf(stderr, "failed to open %s: %s\n", fn, strerror(errno));
+ return -1;
+ }
+
+ char line[PATH_MAX + 200];
+ while (fgets(line, sizeof(line), f)) {
+ while (canned_used >= canned_alloc) {
+ canned_alloc = (canned_alloc+1) * 2;
+ canned_data = (Path*) realloc(canned_data, canned_alloc * sizeof(Path));
+ }
+ Path* p = canned_data + canned_used;
+ p->path = strdup(strtok(line, " "));
+ p->uid = atoi(strtok(NULL, " "));
+ p->gid = atoi(strtok(NULL, " "));
+ p->mode = strtol(strtok(NULL, " "), NULL, 8); // mode is in octal
+ p->capabilities = 0;
+
+ char* token = NULL;
+ do {
+ token = strtok(NULL, " ");
+ if (token && strncmp(token, "capabilities=", 13) == 0) {
+ p->capabilities = strtoll(token+13, NULL, 0);
+ break;
+ }
+ } while (token);
+
+ canned_used++;
+ }
+
+ fclose(f);
+
+ qsort(canned_data, canned_used, sizeof(Path), path_compare);
+ printf("loaded %d fs_config entries\n", canned_used);
+
+ return 0;
+}
+
+static const int kDebugCannedFsConfig = 0;
+
+void canned_fs_config(const char* path, int dir, const char* target_out_path,
+ unsigned* uid, unsigned* gid, unsigned* mode, uint64_t* capabilities) {
+ Path key;
+ key.path = path+1; // canned paths lack the leading '/'
+ Path* p = (Path*) bsearch(&key, canned_data, canned_used, sizeof(Path), path_compare);
+ if (p == NULL) {
+ fprintf(stderr, "failed to find [%s] in canned fs_config\n", path);
+ exit(1);
+ }
+ *uid = p->uid;
+ *gid = p->gid;
+ *mode = p->mode;
+ *capabilities = p->capabilities;
+
+ if (kDebugCannedFsConfig) {
+ // for debugging, run the built-in fs_config and compare the results.
+
+ unsigned c_uid, c_gid, c_mode;
+ uint64_t c_capabilities;
+ fs_config(path, dir, target_out_path, &c_uid, &c_gid, &c_mode, &c_capabilities);
+
+ if (c_uid != *uid) printf("%s uid %d %d\n", path, *uid, c_uid);
+ if (c_gid != *gid) printf("%s gid %d %d\n", path, *gid, c_gid);
+ if (c_mode != *mode) printf("%s mode 0%o 0%o\n", path, *mode, c_mode);
+ if (c_capabilities != *capabilities)
+ printf("%s capabilities %" PRIx64 " %" PRIx64 "\n",
+ path,
+ *capabilities,
+ c_capabilities);
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#ifndef _CANNED_FS_CONFIG_H
+#define _CANNED_FS_CONFIG_H
+
+#include <inttypes.h>
+
+int load_canned_fs_config(const char* fn);
+void canned_fs_config(const char* path, int dir, const char* target_out_path,
+ unsigned* uid, unsigned* gid, unsigned* mode, uint64_t* capabilities);
+
+#endif
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