aboutsummaryrefslogtreecommitdiffstats
path: root/tools/ota/make-update-script.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/ota/make-update-script.c')
-rw-r--r--tools/ota/make-update-script.c233
1 files changed, 0 insertions, 233 deletions
diff --git a/tools/ota/make-update-script.c b/tools/ota/make-update-script.c
deleted file mode 100644
index 1e1148b..0000000
--- a/tools/ota/make-update-script.c
+++ /dev/null
@@ -1,233 +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|x.yy.zzzz|...
- // or:
- // require version-bootloader=x.yy.zzzz|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\"", value);
-
- while ((value = strtok(NULL, "|\n")) != NULL) {
- printf(" || getprop(\"ro.bootloader\") == \"%s\"", value);
- }
- printf("\n");
- }
- // 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;
-}
generated by cgit v1.1 at 2024-12-22 17:48:58 +0000