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Diffstat (limited to 'tools/ota/make-update-script.c')
| -rw-r--r-- | tools/ota/make-update-script.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/tools/ota/make-update-script.c b/tools/ota/make-update-script.c deleted file mode 100644 index 225dc526a..000000000 --- a/tools/ota/make-update-script.c +++ /dev/null @@ -1,228 +0,0 @@ -/* - * Copyright (C) 2008 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 "private/android_filesystem_config.h" - -#include <dirent.h> -#include <limits.h> -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <unistd.h> - -/* - * Recursively walk the directory tree at <sysdir>/<subdir>, writing - * script commands to set permissions and create symlinks. - * Assume the contents already have the specified default permissions, - * so only output commands if they need to be changed from the defaults. - * - * Note that permissions are set by fs_config(), which uses a lookup table of - * Android permissions. They are not drawn from the build host filesystem. - */ -static void walk_files( - const char *sysdir, const char *subdir, - unsigned default_uid, unsigned default_gid, - unsigned default_dir_mode, unsigned default_file_mode) { - const char *sep = strcmp(subdir, "") ? "/" : ""; - - char fn[PATH_MAX]; - unsigned dir_uid = 0, dir_gid = 0, dir_mode = 0; - snprintf(fn, PATH_MAX, "system%s%s", sep, subdir); - fs_config(fn, 1, &dir_uid, &dir_gid, &dir_mode); - - snprintf(fn, PATH_MAX, "%s%s%s", sysdir, sep, subdir); - DIR *dir = opendir(fn); - if (dir == NULL) { - perror(fn); - exit(1); - } - - /* - * We can use "set_perm" and "set_perm_recursive" to set file permissions - * (owner, group, and file mode) for individual files and entire subtrees. - * We want to use set_perm_recursive efficiently to avoid setting the - * permissions of every single file in the system image individually. - * - * What we do is recursively set our entire subtree to the permissions - * used by the first file we encounter, and then use "set_perm" to adjust - * the permissions of subsequent files which don't match the first one. - * This is bad if the first file is an outlier, but it generally works. - * Subdirectories can do the same thing recursively if they're different. - */ - - int is_first = 1; - const struct dirent *e; - while ((e = readdir(dir))) { - // Skip over "." and ".." entries - if (!strcmp(e->d_name, ".") || !strcmp(e->d_name, "..")) continue; - - if (e->d_type == DT_LNK) { // Symlink - - // Symlinks don't really have permissions, so this is orthogonal. - snprintf(fn, PATH_MAX, "%s/%s%s%s", sysdir, subdir, sep, e->d_name); - int len = readlink(fn, fn, PATH_MAX - 1); - if (len <= 0) { - perror(fn); - exit(1); - } - fn[len] = '\0'; - printf("symlink %s SYSTEM:%s%s%s\n", fn, subdir, sep, e->d_name); - - } else if (e->d_type == DT_DIR) { // Subdirectory - - // Use the parent directory as the model for default permissions. - // We haven't seen a file, so just make up some file defaults. - if (is_first && ( - dir_mode != default_dir_mode || - dir_uid != default_uid || dir_gid != default_gid)) { - default_uid = dir_uid; - default_gid = dir_gid; - default_dir_mode = dir_mode; - default_file_mode = dir_mode & default_file_mode & 0666; - printf("set_perm_recursive %d %d 0%o 0%o SYSTEM:%s\n", - default_uid, default_gid, - default_dir_mode, default_file_mode, - subdir); - } - - is_first = 0; - - // Recursively handle the subdirectory. - // Note, the recursive call handles the directory's own permissions. - snprintf(fn, PATH_MAX, "%s%s%s", subdir, sep, e->d_name); - walk_files(sysdir, fn, - default_uid, default_gid, - default_dir_mode, default_file_mode); - - } else { // Ordinary file - - // Get the file's desired permissions. - unsigned file_uid = 0, file_gid = 0, file_mode = 0; - snprintf(fn, PATH_MAX, "system/%s%s%s", subdir, sep, e->d_name); - fs_config(fn, 0, &file_uid, &file_gid, &file_mode); - - // If this is the first file, its mode gets to become the default. - if (is_first && ( - dir_mode != default_dir_mode || - file_mode != default_file_mode || - dir_uid != default_uid || file_uid != default_uid || - dir_gid != default_gid || file_gid != default_gid)) { - default_uid = dir_uid; - default_gid = dir_gid; - default_dir_mode = dir_mode; - default_file_mode = file_mode; - printf("set_perm_recursive %d %d 0%o 0%o SYSTEM:%s\n", - default_uid, default_gid, - default_dir_mode, default_file_mode, - subdir); - } - - is_first = 0; - - // Otherwise, override this file if it doesn't match the defaults. - if (file_mode != default_file_mode || - file_uid != default_uid || file_gid != default_gid) { - printf("set_perm %d %d 0%o SYSTEM:%s%s%s\n", - file_uid, file_gid, file_mode, - subdir, sep, e->d_name); - } - - } - } - - // Set the directory's permissions directly, if they never got set. - if (dir_mode != default_dir_mode || - dir_uid != default_uid || dir_gid != default_gid) { - printf("set_perm %d %d 0%o SYSTEM:%s\n", - dir_uid, dir_gid, dir_mode, subdir); - } - - closedir(dir); -} - -/* - * Generate the update script (in "Amend", see commands/recovery/commands.c) - * for the complete-reinstall OTA update packages the build system makes. - * - * The generated script makes a variety of sanity checks about the device, - * erases and reinstalls system files, and sets file permissions appropriately. - */ -int main(int argc, char *argv[]) { - if (argc != 3) { - fprintf(stderr, "usage: %s systemdir android-info.txt >update-script\n", - argv[0]); - return 2; - } - - // ensure basic recovery script language compatibility - printf("assert compatible_with(\"0.2\") == \"true\"\n"); - - // if known, make sure the device name is correct - const char *device = getenv("TARGET_DEVICE"); - if (device != NULL) { - printf("assert getprop(\"ro.product.device\") == \"%s\" || " - "getprop(\"ro.build.product\") == \"%s\"\n", device, device); - } - - // scan android-info.txt to enforce compatibility with the target system - FILE *fp = fopen(argv[2], "r"); - if (fp == NULL) { - perror(argv[2]); - return 1; - } - - // The lines we're looking for look like: - // version-bootloader=x.yy.zzzz - // or: - // require version-bootloader=x.yy.zzzz - char line[256]; - while (fgets(line, sizeof(line), fp)) { - const char *name = strtok(line, "="), *value = strtok(NULL, "\n"); - if (value != NULL && - (!strcmp(name, "version-bootloader") || - !strcmp(name, "require version-bootloader"))) { - printf("assert getprop(\"ro.bootloader\") == \"%s\"\n", value); - } - // We also used to check version-baseband, but we update radio.img - // ourselves, so there's no need. - } - - // erase the boot sector first, so if the update gets interrupted, - // the system will reboot into the recovery partition and start over. - printf("format BOOT:\n"); - - // write the radio image (actually just loads it into RAM for now) - printf("show_progress 0.1 0\n"); - printf("write_radio_image PACKAGE:radio.img\n"); - - // erase and reinstall the system image - printf("show_progress 0.5 0\n"); - printf("format SYSTEM:\n"); - printf("copy_dir PACKAGE:system SYSTEM:\n"); - - // walk the files in the system image, set their permissions, etc. - // use -1 for default values to force permissions to be set explicitly. - walk_files(argv[1], "", -1, -1, -1, -1); - - // as the last step, write the boot sector. - printf("show_progress 0.2 0\n"); - printf("write_raw_image PACKAGE:boot.img BOOT:\n"); - - // after the end of the script, the radio will be written to cache - // leave some space in the progress bar for this operation - printf("show_progress 0.2 10\n"); - return 0; -} |