From 10e418d3c89ec404fbf959c1ef77a720a42a66ed Mon Sep 17 00:00:00 2001 From: Doug Zongker Date: Fri, 28 Oct 2011 10:33:05 -0700 Subject: turn recovery into a C++ binary Change-Id: I68a67a4c8edec9a74463b3d4766005ce27b51316 --- roots.c | 282 ---------------------------------------------------------------- 1 file changed, 282 deletions(-) delete mode 100644 roots.c (limited to 'roots.c') diff --git a/roots.c b/roots.c deleted file mode 100644 index cb7e067a1..000000000 --- a/roots.c +++ /dev/null @@ -1,282 +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 -#include -#include -#include -#include -#include -#include - -#include "mtdutils/mtdutils.h" -#include "mtdutils/mounts.h" -#include "roots.h" -#include "common.h" -#include "make_ext4fs.h" - -static int num_volumes = 0; -static Volume* device_volumes = NULL; - -static int parse_options(char* options, Volume* volume) { - char* option; - while (option = strtok(options, ",")) { - options = NULL; - - if (strncmp(option, "length=", 7) == 0) { - volume->length = strtoll(option+7, NULL, 10); - } else { - LOGE("bad option \"%s\"\n", option); - return -1; - } - } - return 0; -} - -void load_volume_table() { - int alloc = 2; - device_volumes = malloc(alloc * sizeof(Volume)); - - // Insert an entry for /tmp, which is the ramdisk and is always mounted. - device_volumes[0].mount_point = "/tmp"; - device_volumes[0].fs_type = "ramdisk"; - device_volumes[0].device = NULL; - device_volumes[0].device2 = NULL; - device_volumes[0].length = 0; - num_volumes = 1; - - FILE* fstab = fopen("/etc/recovery.fstab", "r"); - if (fstab == NULL) { - LOGE("failed to open /etc/recovery.fstab (%s)\n", strerror(errno)); - return; - } - - char buffer[1024]; - int i; - while (fgets(buffer, sizeof(buffer)-1, fstab)) { - for (i = 0; buffer[i] && isspace(buffer[i]); ++i); - if (buffer[i] == '\0' || buffer[i] == '#') continue; - - char* original = strdup(buffer); - - char* mount_point = strtok(buffer+i, " \t\n"); - char* fs_type = strtok(NULL, " \t\n"); - char* device = strtok(NULL, " \t\n"); - // lines may optionally have a second device, to use if - // mounting the first one fails. - char* options = NULL; - char* device2 = strtok(NULL, " \t\n"); - if (device2) { - if (device2[0] == '/') { - options = strtok(NULL, " \t\n"); - } else { - options = device2; - device2 = NULL; - } - } - - if (mount_point && fs_type && device) { - while (num_volumes >= alloc) { - alloc *= 2; - device_volumes = realloc(device_volumes, alloc*sizeof(Volume)); - } - device_volumes[num_volumes].mount_point = strdup(mount_point); - device_volumes[num_volumes].fs_type = strdup(fs_type); - device_volumes[num_volumes].device = strdup(device); - device_volumes[num_volumes].device2 = - device2 ? strdup(device2) : NULL; - - device_volumes[num_volumes].length = 0; - if (parse_options(options, device_volumes + num_volumes) != 0) { - LOGE("skipping malformed recovery.fstab line: %s\n", original); - } else { - ++num_volumes; - } - } else { - LOGE("skipping malformed recovery.fstab line: %s\n", original); - } - free(original); - } - - fclose(fstab); - - printf("recovery filesystem table\n"); - printf("=========================\n"); - for (i = 0; i < num_volumes; ++i) { - Volume* v = &device_volumes[i]; - printf(" %d %s %s %s %s %lld\n", i, v->mount_point, v->fs_type, - v->device, v->device2, v->length); - } - printf("\n"); -} - -Volume* volume_for_path(const char* path) { - int i; - for (i = 0; i < num_volumes; ++i) { - Volume* v = device_volumes+i; - int len = strlen(v->mount_point); - if (strncmp(path, v->mount_point, len) == 0 && - (path[len] == '\0' || path[len] == '/')) { - return v; - } - } - return NULL; -} - -int ensure_path_mounted(const char* path) { - Volume* v = volume_for_path(path); - if (v == NULL) { - LOGE("unknown volume for path [%s]\n", path); - return -1; - } - if (strcmp(v->fs_type, "ramdisk") == 0) { - // the ramdisk is always mounted. - return 0; - } - - int result; - result = scan_mounted_volumes(); - if (result < 0) { - LOGE("failed to scan mounted volumes\n"); - return -1; - } - - const MountedVolume* mv = - find_mounted_volume_by_mount_point(v->mount_point); - if (mv) { - // volume is already mounted - return 0; - } - - mkdir(v->mount_point, 0755); // in case it doesn't already exist - - if (strcmp(v->fs_type, "yaffs2") == 0) { - // mount an MTD partition as a YAFFS2 filesystem. - mtd_scan_partitions(); - const MtdPartition* partition; - partition = mtd_find_partition_by_name(v->device); - if (partition == NULL) { - LOGE("failed to find \"%s\" partition to mount at \"%s\"\n", - v->device, v->mount_point); - return -1; - } - return mtd_mount_partition(partition, v->mount_point, v->fs_type, 0); - } else if (strcmp(v->fs_type, "ext4") == 0 || - strcmp(v->fs_type, "vfat") == 0) { - result = mount(v->device, v->mount_point, v->fs_type, - MS_NOATIME | MS_NODEV | MS_NODIRATIME, ""); - if (result == 0) return 0; - - if (v->device2) { - LOGW("failed to mount %s (%s); trying %s\n", - v->device, strerror(errno), v->device2); - result = mount(v->device2, v->mount_point, v->fs_type, - MS_NOATIME | MS_NODEV | MS_NODIRATIME, ""); - if (result == 0) return 0; - } - - LOGE("failed to mount %s (%s)\n", v->mount_point, strerror(errno)); - return -1; - } - - LOGE("unknown fs_type \"%s\" for %s\n", v->fs_type, v->mount_point); - return -1; -} - -int ensure_path_unmounted(const char* path) { - Volume* v = volume_for_path(path); - if (v == NULL) { - LOGE("unknown volume for path [%s]\n", path); - return -1; - } - if (strcmp(v->fs_type, "ramdisk") == 0) { - // the ramdisk is always mounted; you can't unmount it. - return -1; - } - - int result; - result = scan_mounted_volumes(); - if (result < 0) { - LOGE("failed to scan mounted volumes\n"); - return -1; - } - - const MountedVolume* mv = - find_mounted_volume_by_mount_point(v->mount_point); - if (mv == NULL) { - // volume is already unmounted - return 0; - } - - return unmount_mounted_volume(mv); -} - -int format_volume(const char* volume) { - Volume* v = volume_for_path(volume); - if (v == NULL) { - LOGE("unknown volume \"%s\"\n", volume); - return -1; - } - if (strcmp(v->fs_type, "ramdisk") == 0) { - // you can't format the ramdisk. - LOGE("can't format_volume \"%s\"", volume); - return -1; - } - if (strcmp(v->mount_point, volume) != 0) { - LOGE("can't give path \"%s\" to format_volume\n", volume); - return -1; - } - - if (ensure_path_unmounted(volume) != 0) { - LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point); - return -1; - } - - if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0) { - mtd_scan_partitions(); - const MtdPartition* partition = mtd_find_partition_by_name(v->device); - if (partition == NULL) { - LOGE("format_volume: no MTD partition \"%s\"\n", v->device); - return -1; - } - - MtdWriteContext *write = mtd_write_partition(partition); - if (write == NULL) { - LOGW("format_volume: can't open MTD \"%s\"\n", v->device); - return -1; - } else if (mtd_erase_blocks(write, -1) == (off_t) -1) { - LOGW("format_volume: can't erase MTD \"%s\"\n", v->device); - mtd_write_close(write); - return -1; - } else if (mtd_write_close(write)) { - LOGW("format_volume: can't close MTD \"%s\"\n", v->device); - return -1; - } - return 0; - } - - if (strcmp(v->fs_type, "ext4") == 0) { - int result = make_ext4fs(v->device, v->length); - if (result != 0) { - LOGE("format_volume: make_extf4fs failed on %s\n", v->device); - return -1; - } - return 0; - } - - LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type); - return -1; -} -- cgit v1.2.3