128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <private/android_filesystem_config.h>
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/*
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* This program expects android_device_dirs and android_device_files
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* to be defined in the supplied android_filesystem_config.h file in
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* the device/<vendor>/<product> $(TARGET_DEVICE_DIR). Then generates
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* the binary format used in the /system/etc/fs_config_dirs and
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* the /system/etc/fs_config_files to be used by the runtimes.
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*/
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#include "android_filesystem_config.h"
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#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS
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static const struct fs_path_config android_device_dirs[] = {
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};
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#endif
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#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_FILES
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static const struct fs_path_config android_device_files[] = {
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#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS
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{ 0, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_dirs" },
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#endif
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{ 0, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_files" },
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};
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#endif
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static void usage() {
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fprintf(stderr,
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"Generate binary content for fs_config_dirs (-D) and fs_config_files (-F)\n"
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"from device-specific android_filesystem_config.h override\n\n"
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"Usage: fs_config_generate -D|-F [-o output-file]\n");
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}
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int main(int argc, char** argv) {
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const struct fs_path_config *pc;
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const struct fs_path_config *end;
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bool dir = false, file = false;
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FILE *fp = stdout;
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int opt;
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while((opt = getopt(argc, argv, "DFho:")) != -1) {
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switch(opt) {
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case 'D':
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if (file) {
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fprintf(stderr, "Must specify only -D or -F\n");
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usage();
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exit(EXIT_FAILURE);
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}
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dir = true;
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break;
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case 'F':
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if (dir) {
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fprintf(stderr, "Must specify only -F or -D\n");
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usage();
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exit(EXIT_FAILURE);
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}
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file = true;
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break;
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case 'o':
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if (fp != stdout) {
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fprintf(stderr, "Specify only one output file\n");
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usage();
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exit(EXIT_FAILURE);
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}
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fp = fopen(optarg, "wb");
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if (fp == NULL) {
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fprintf(stderr, "Can not open \"%s\"\n", optarg);
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exit(EXIT_FAILURE);
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}
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break;
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case 'h':
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usage();
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exit(EXIT_SUCCESS);
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default:
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usage();
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exit(EXIT_FAILURE);
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}
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}
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if (!file && !dir) {
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fprintf(stderr, "Must specify either -F or -D\n");
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usage();
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exit(EXIT_FAILURE);
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}
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if (dir) {
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pc = android_device_dirs;
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end = &android_device_dirs[sizeof(android_device_dirs) / sizeof(android_device_dirs[0])];
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} else {
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pc = android_device_files;
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end = &android_device_files[sizeof(android_device_files) / sizeof(android_device_files[0])];
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}
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for(; (pc < end) && pc->prefix; pc++) {
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char buffer[512];
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ssize_t len = fs_config_generate(buffer, sizeof(buffer), pc);
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if (len < 0) {
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fprintf(stderr, "Entry too large\n");
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exit(EXIT_FAILURE);
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}
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if (fwrite(buffer, 1, len, fp) != (size_t)len) {
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fprintf(stderr, "Write failure\n");
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exit(EXIT_FAILURE);
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}
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}
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fclose(fp);
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return 0;
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}
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