summaryrefslogtreecommitdiffstats
path: root/roots.c
diff options
context:
space:
mode:
Diffstat (limited to 'roots.c')
-rw-r--r--roots.c370
1 files changed, 0 insertions, 370 deletions
diff --git a/roots.c b/roots.c
deleted file mode 100644
index 6a6cf8a..0000000
--- a/roots.c
+++ /dev/null
@@ -1,370 +0,0 @@
-/*
- * Copyright (C) 2007 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 <errno.h>
-#include <stdlib.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "mtdutils/mtdutils.h"
-#include "mtdutils/mounts.h"
-#include "minzip/Zip.h"
-#include "roots.h"
-#include "common.h"
-
-typedef struct {
- const char *name;
- const char *device;
- const char *device2; // If the first one doesn't work (may be NULL)
- const char *partition_name;
- const char *mount_point;
- const char *filesystem;
-} RootInfo;
-
-/* Canonical pointers.
-xxx may just want to use enums
- */
-static const char g_mtd_device[] = "@\0g_mtd_device";
-static const char g_raw[] = "@\0g_raw";
-static const char g_package_file[] = "@\0g_package_file";
-
-static RootInfo g_roots[] = {
- { "BOOT:", g_mtd_device, NULL, "boot", NULL, g_raw },
- { "CACHE:", g_mtd_device, NULL, "cache", "/cache", "yaffs2" },
- { "DATA:", g_mtd_device, NULL, "userdata", "/data", "yaffs2" },
- { "MISC:", g_mtd_device, NULL, "misc", NULL, g_raw },
- { "PACKAGE:", NULL, NULL, NULL, NULL, g_package_file },
- { "RECOVERY:", g_mtd_device, NULL, "recovery", "/", g_raw },
- { "SDCARD:", "/dev/block/mmcblk0p1", "/dev/block/mmcblk0", NULL, "/sdcard", "vfat" },
- { "SYSTEM:", g_mtd_device, NULL, "system", "/system", "yaffs2" },
- { "TMP:", NULL, NULL, NULL, "/tmp", NULL },
-};
-#define NUM_ROOTS (sizeof(g_roots) / sizeof(g_roots[0]))
-
-// TODO: for SDCARD:, try /dev/block/mmcblk0 if mmcblk0p1 fails
-
-static const RootInfo *
-get_root_info_for_path(const char *root_path)
-{
- const char *c;
-
- /* Find the first colon.
- */
- c = root_path;
- while (*c != '\0' && *c != ':') {
- c++;
- }
- if (*c == '\0') {
- return NULL;
- }
- size_t len = c - root_path + 1;
- size_t i;
- for (i = 0; i < NUM_ROOTS; i++) {
- RootInfo *info = &g_roots[i];
- if (strncmp(info->name, root_path, len) == 0) {
- return info;
- }
- }
- return NULL;
-}
-
-static const ZipArchive *g_package = NULL;
-static char *g_package_path = NULL;
-
-int
-register_package_root(const ZipArchive *package, const char *package_path)
-{
- if (package != NULL) {
- package_path = strdup(package_path);
- if (package_path == NULL) {
- return -1;
- }
- g_package_path = (char *)package_path;
- } else {
- free(g_package_path);
- g_package_path = NULL;
- }
- g_package = package;
- return 0;
-}
-
-int
-is_package_root_path(const char *root_path)
-{
- const RootInfo *info = get_root_info_for_path(root_path);
- return info != NULL && info->filesystem == g_package_file;
-}
-
-const char *
-translate_package_root_path(const char *root_path,
- char *out_buf, size_t out_buf_len, const ZipArchive **out_package)
-{
- const RootInfo *info = get_root_info_for_path(root_path);
- if (info == NULL || info->filesystem != g_package_file) {
- return NULL;
- }
-
- /* Strip the package root off of the path.
- */
- size_t root_len = strlen(info->name);
- root_path += root_len;
- size_t root_path_len = strlen(root_path);
-
- if (out_buf_len < root_path_len + 1) {
- return NULL;
- }
- strcpy(out_buf, root_path);
- *out_package = g_package;
- return out_buf;
-}
-
-/* Takes a string like "SYSTEM:lib" and turns it into a string
- * like "/system/lib". The translated path is put in out_buf,
- * and out_buf is returned if the translation succeeded.
- */
-const char *
-translate_root_path(const char *root_path, char *out_buf, size_t out_buf_len)
-{
- if (out_buf_len < 1) {
- return NULL;
- }
-
- const RootInfo *info = get_root_info_for_path(root_path);
- if (info == NULL || info->mount_point == NULL) {
- return NULL;
- }
-
- /* Find the relative part of the non-root part of the path.
- */
- root_path += strlen(info->name); // strip off the "root:"
- while (*root_path != '\0' && *root_path == '/') {
- root_path++;
- }
-
- size_t mp_len = strlen(info->mount_point);
- size_t rp_len = strlen(root_path);
- if (mp_len + 1 + rp_len + 1 > out_buf_len) {
- return NULL;
- }
-
- /* Glue the mount point to the relative part of the path.
- */
- memcpy(out_buf, info->mount_point, mp_len);
- if (out_buf[mp_len - 1] != '/') out_buf[mp_len++] = '/';
-
- memcpy(out_buf + mp_len, root_path, rp_len);
- out_buf[mp_len + rp_len] = '\0';
-
- return out_buf;
-}
-
-static int
-internal_root_mounted(const RootInfo *info)
-{
- if (info->mount_point == NULL) {
- return -1;
- }
-//xxx if TMP: (or similar) just say "yes"
-
- /* See if this root is already mounted.
- */
- int ret = scan_mounted_volumes();
- if (ret < 0) {
- return ret;
- }
- const MountedVolume *volume;
- volume = find_mounted_volume_by_mount_point(info->mount_point);
- if (volume != NULL) {
- /* It's already mounted.
- */
- return 0;
- }
- return -1;
-}
-
-int
-is_root_path_mounted(const char *root_path)
-{
- const RootInfo *info = get_root_info_for_path(root_path);
- if (info == NULL) {
- return -1;
- }
- return internal_root_mounted(info) >= 0;
-}
-
-int
-ensure_root_path_mounted(const char *root_path)
-{
- const RootInfo *info = get_root_info_for_path(root_path);
- if (info == NULL) {
- return -1;
- }
-
- int ret = internal_root_mounted(info);
- if (ret >= 0) {
- /* It's already mounted.
- */
- return 0;
- }
-
- /* It's not mounted.
- */
- if (info->device == g_mtd_device) {
- if (info->partition_name == NULL) {
- return -1;
- }
-//TODO: make the mtd stuff scan once when it needs to
- mtd_scan_partitions();
- const MtdPartition *partition;
- partition = mtd_find_partition_by_name(info->partition_name);
- if (partition == NULL) {
- return -1;
- }
- return mtd_mount_partition(partition, info->mount_point,
- info->filesystem, 0);
- }
-
- if (info->device == NULL || info->mount_point == NULL ||
- info->filesystem == NULL ||
- info->filesystem == g_raw ||
- info->filesystem == g_package_file) {
- return -1;
- }
-
- mkdir(info->mount_point, 0755); // in case it doesn't already exist
- if (mount(info->device, info->mount_point, info->filesystem,
- MS_NOATIME | MS_NODEV | MS_NODIRATIME, "")) {
- if (info->device2 == NULL) {
- LOGE("Can't mount %s\n(%s)\n", info->device, strerror(errno));
- return -1;
- } else if (mount(info->device2, info->mount_point, info->filesystem,
- MS_NOATIME | MS_NODEV | MS_NODIRATIME, "")) {
- LOGE("Can't mount %s (or %s)\n(%s)\n",
- info->device, info->device2, strerror(errno));
- return -1;
- }
- }
- return 0;
-}
-
-int
-ensure_root_path_unmounted(const char *root_path)
-{
- const RootInfo *info = get_root_info_for_path(root_path);
- if (info == NULL) {
- return -1;
- }
- if (info->mount_point == NULL) {
- /* This root can't be mounted, so by definition it isn't.
- */
- return 0;
- }
-//xxx if TMP: (or similar) just return error
-
- /* See if this root is already mounted.
- */
- int ret = scan_mounted_volumes();
- if (ret < 0) {
- return ret;
- }
- const MountedVolume *volume;
- volume = find_mounted_volume_by_mount_point(info->mount_point);
- if (volume == NULL) {
- /* It's not mounted.
- */
- return 0;
- }
-
- return unmount_mounted_volume(volume);
-}
-
-const MtdPartition *
-get_root_mtd_partition(const char *root_path)
-{
- const RootInfo *info = get_root_info_for_path(root_path);
- if (info == NULL || info->device != g_mtd_device ||
- info->partition_name == NULL)
- {
- return NULL;
- }
- mtd_scan_partitions();
- return mtd_find_partition_by_name(info->partition_name);
-}
-
-int
-format_root_device(const char *root)
-{
- /* Be a little safer here; require that "root" is just
- * a device with no relative path after it.
- */
- const char *c = root;
- while (*c != '\0' && *c != ':') {
- c++;
- }
- if (c[0] != ':' || c[1] != '\0') {
- LOGW("format_root_device: bad root name \"%s\"\n", root);
- return -1;
- }
-
- const RootInfo *info = get_root_info_for_path(root);
- if (info == NULL || info->device == NULL) {
- LOGW("format_root_device: can't resolve \"%s\"\n", root);
- return -1;
- }
- if (info->mount_point != NULL) {
- /* Don't try to format a mounted device.
- */
- int ret = ensure_root_path_unmounted(root);
- if (ret < 0) {
- LOGW("format_root_device: can't unmount \"%s\"\n", root);
- return ret;
- }
- }
-
- /* Format the device.
- */
- if (info->device == g_mtd_device) {
- mtd_scan_partitions();
- const MtdPartition *partition;
- partition = mtd_find_partition_by_name(info->partition_name);
- if (partition == NULL) {
- LOGW("format_root_device: can't find mtd partition \"%s\"\n",
- info->partition_name);
- return -1;
- }
- if (info->filesystem == g_raw || !strcmp(info->filesystem, "yaffs2")) {
- MtdWriteContext *write = mtd_write_partition(partition);
- if (write == NULL) {
- LOGW("format_root_device: can't open \"%s\"\n", root);
- return -1;
- } else if (mtd_erase_blocks(write, -1) == (off_t) -1) {
- LOGW("format_root_device: can't erase \"%s\"\n", root);
- mtd_write_close(write);
- return -1;
- } else if (mtd_write_close(write)) {
- LOGW("format_root_device: can't close \"%s\"\n", root);
- return -1;
- } else {
- return 0;
- }
- }
- }
-//TODO: handle other device types (sdcard, etc.)
- LOGW("format_root_device: can't handle non-mtd device \"%s\"\n", root);
- return -1;
-}
generated by cgit v1.1 at 2024-12-22 18:57:20 +0000