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/*
* Copyright (C) 2015 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 <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <private/android_filesystem_config.h>
/*
* This program expects android_device_dirs and android_device_files
* to be defined in the supplied android_filesystem_config.h file in
* the device/<vendor>/<product> $(TARGET_DEVICE_DIR). Then generates
* the binary format used in the /system/etc/fs_config_dirs and
* the /system/etc/fs_config_files to be used by the runtimes.
*/
#include "android_filesystem_config.h"
#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS
static const struct fs_path_config android_device_dirs[] = {
};
#endif
#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_FILES
static const struct fs_path_config android_device_files[] = {
#ifdef NO_ANDROID_FILESYSTEM_CONFIG_DEVICE_DIRS
{ 0, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_dirs" },
#endif
{ 0, AID_ROOT, AID_ROOT, 0, "system/etc/fs_config_files" },
};
#endif
static void usage() {
fprintf(stderr,
"Generate binary content for fs_config_dirs (-D) and fs_config_files (-F)\n"
"from device-specific android_filesystem_config.h override\n\n"
"Usage: fs_config_generate -D|-F [-o output-file]\n");
}
int main(int argc, char** argv) {
const struct fs_path_config *pc;
const struct fs_path_config *end;
bool dir = false, file = false;
FILE *fp = stdout;
int opt;
while((opt = getopt(argc, argv, "DFho:")) != -1) {
switch(opt) {
case 'D':
if (file) {
fprintf(stderr, "Must specify only -D or -F\n");
usage();
exit(EXIT_FAILURE);
}
dir = true;
break;
case 'F':
if (dir) {
fprintf(stderr, "Must specify only -F or -D\n");
usage();
exit(EXIT_FAILURE);
}
file = true;
break;
case 'o':
if (fp != stdout) {
fprintf(stderr, "Specify only one output file\n");
usage();
exit(EXIT_FAILURE);
}
fp = fopen(optarg, "wb");
if (fp == NULL) {
fprintf(stderr, "Can not open \"%s\"\n", optarg);
exit(EXIT_FAILURE);
}
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
default:
usage();
exit(EXIT_FAILURE);
}
}
if (!file && !dir) {
fprintf(stderr, "Must specify either -F or -D\n");
usage();
exit(EXIT_FAILURE);
}
if (dir) {
pc = android_device_dirs;
end = &android_device_dirs[sizeof(android_device_dirs) / sizeof(android_device_dirs[0])];
} else {
pc = android_device_files;
end = &android_device_files[sizeof(android_device_files) / sizeof(android_device_files[0])];
}
for(; (pc < end) && pc->prefix; pc++) {
char buffer[512];
ssize_t len = fs_config_generate(buffer, sizeof(buffer), pc);
if (len < 0) {
fprintf(stderr, "Entry too large\n");
exit(EXIT_FAILURE);
}
if (fwrite(buffer, 1, len, fp) != (size_t)len) {
fprintf(stderr, "Write failure\n");
exit(EXIT_FAILURE);
}
}
fclose(fp);
return 0;
}
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