forked from openkylin/platform_build
225 lines
6.8 KiB
C
225 lines
6.8 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 <ctype.h>
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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 <string.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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#ifdef ANDROID_FILESYSTEM_CONFIG
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#include ANDROID_FILESYSTEM_CONFIG
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#else
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#include "android_filesystem_config.h"
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#endif
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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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#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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{0000, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_dirs"},
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{0000, AID_ROOT, AID_ROOT, 0, "vendor/etc/fs_config_dirs"},
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{0000, AID_ROOT, AID_ROOT, 0, "oem/etc/fs_config_dirs"},
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{0000, AID_ROOT, AID_ROOT, 0, "odm/etc/fs_config_dirs"},
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#endif
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{0000, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_files"},
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{0000, AID_ROOT, AID_ROOT, 0, "vendor/etc/fs_config_files"},
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{0000, AID_ROOT, AID_ROOT, 0, "oem/etc/fs_config_files"},
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{0000, AID_ROOT, AID_ROOT, 0, "odm/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. Filter based\n"
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"on a comma separated partition list (-P) whitelist or prefixed by a\n"
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"minus blacklist. Partitions are identified as path references to\n"
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"<partition>/ or system/<partition>/\n\n"
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"Usage: fs_config_generate -D|-F [-P list] [-o output-file]\n");
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}
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/* If tool switches to C++, use android-base/macros.h array_size() */
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#ifndef ARRAY_SIZE /* popular macro */
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#endif
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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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const char* partitions = NULL;
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FILE* fp = stdout;
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int opt;
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static const char optstring[] = "DFP:ho:";
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while ((opt = getopt(argc, argv, optstring)) != -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 'P':
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if (partitions) {
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fprintf(stderr, "Specify only one partition list\n");
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usage();
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exit(EXIT_FAILURE);
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}
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while (*optarg && isspace(*optarg)) ++optarg;
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if (!optarg[0]) {
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fprintf(stderr, "Partition list empty\n");
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usage();
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exit(EXIT_FAILURE);
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}
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if (!optarg[1]) {
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fprintf(stderr, "Partition list too short \"%s\"\n", optarg);
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usage();
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exit(EXIT_FAILURE);
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}
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if ((optarg[0] == '-') && strchr(optstring, optarg[1]) && !optarg[2]) {
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fprintf(stderr, "Partition list is a flag \"%s\"\n", optarg);
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usage();
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exit(EXIT_FAILURE);
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}
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partitions = optarg;
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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 (optind < argc) {
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fprintf(stderr, "Unknown non-argument \"%s\"\n", argv[optind]);
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usage();
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exit(EXIT_FAILURE);
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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[ARRAY_SIZE(android_device_dirs)];
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} else {
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pc = android_device_files;
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end = &android_device_files[ARRAY_SIZE(android_device_files)];
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}
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for (; (pc < end) && pc->prefix; pc++) {
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bool submit;
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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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submit = true;
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if (partitions) {
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char* partitions_copy = strdup(partitions);
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char* arg = partitions_copy;
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char* sv = NULL; /* Do not leave uninitialized, NULL is known safe. */
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/* Deal with case all iterated partitions are blacklists with no match */
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bool all_blacklist_but_no_match = true;
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submit = false;
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if (!partitions_copy) {
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fprintf(stderr, "Failed to allocate a copy of %s\n", partitions);
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exit(EXIT_FAILURE);
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}
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/* iterate through (officially) comma separated list of partitions */
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while (!!(arg = strtok_r(arg, ",:; \t\n\r\f", &sv))) {
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static const char system[] = "system/";
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size_t plen;
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bool blacklist = false;
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if (*arg == '-') {
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blacklist = true;
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++arg;
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} else {
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all_blacklist_but_no_match = false;
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}
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plen = strlen(arg);
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/* deal with evil callers */
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while (arg[plen - 1] == '/') {
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--plen;
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}
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/* check if we have <partition>/ or /system/<partition>/ */
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if ((!strncmp(pc->prefix, arg, plen) && (pc->prefix[plen] == '/')) ||
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(!strncmp(pc->prefix, system, strlen(system)) &&
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!strncmp(pc->prefix + strlen(system), arg, plen) &&
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(pc->prefix[strlen(system) + plen] == '/'))) {
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all_blacklist_but_no_match = false;
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/* we have a match !!! */
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if (!blacklist) submit = true;
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break;
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}
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arg = NULL;
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}
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free(partitions_copy);
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if (all_blacklist_but_no_match) submit = true;
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}
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if (submit && (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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