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platform_bootable_recovery/updater/install.c
Doug Zongker 9931f7f3c1 edify extensions for OTA package installation, part 1 
Adds the following edify functions:

  mount unmount format show_progress delete delete_recursive
  package_extract symlink set_perm set_perm_recursive

This set is enough to extract and install the system part of a (full)
OTA package.

Adds the updater binary that extracts an edify script from the OTA
package and then executes it.  Minor changes to the edify core (adds a
sleep() builtin for debugging, adds "." to the set of characters that
can appear in an unquoted string).
2009-06-11 16:25:29 -07:00

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/*
* Copyright (C) 2009 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 <stdio.h>
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "edify/expr.h"
#include "minzip/DirUtil.h"
#include "mtdutils/mounts.h"
#include "mtdutils/mtdutils.h"
#include "updater.h"
char* ErrorAbort(void* cookie, char* format, ...) {
char* buffer = malloc(4096);
va_list v;
va_start(v, format);
vsnprintf(buffer, 4096, format, v);
va_end(v);
SetError(buffer);
return NULL;
}
// mount(type, location, mount_point)
//
// what: type="MTD" location="<partition>" to mount a yaffs2 filesystem
// type="vfat" location="/dev/block/<whatever>" to mount a device
char* MountFn(const char* name, void* cookie, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 3) {
return ErrorAbort(cookie, "%s() expects 3 args, got %d", name, argc);
}
char* type;
char* location;
char* mount_point;
if (ReadArgs(cookie, argv, 3, &type, &location, &mount_point) < 0) {
return NULL;
}
if (strlen(type) == 0) {
ErrorAbort(cookie, "type argument to %s() can't be empty", name);
goto done;
}
if (strlen(location) == 0) {
ErrorAbort(cookie, "location argument to %s() can't be empty", name);
goto done;
}
if (strlen(mount_point) == 0) {
ErrorAbort(cookie, "mount_point argument to %s() can't be empty", name);
goto done;
}
mkdir(mount_point, 0755);
if (strcmp(type, "MTD") == 0) {
mtd_scan_partitions();
const MtdPartition* mtd;
mtd = mtd_find_partition_by_name(location);
if (mtd == NULL) {
fprintf(stderr, "%s: no mtd partition named \"%s\"",
name, location);
result = strdup("");
goto done;
}
if (mtd_mount_partition(mtd, mount_point, "yaffs2", 0 /* rw */) != 0) {
fprintf(stderr, "mtd mount of %s failed: %s\n",
location, strerror(errno));
result = strdup("");
goto done;
}
result = mount_point;
} else {
if (mount(location, mount_point, type,
MS_NOATIME | MS_NODEV | MS_NODIRATIME, "") < 0) {
result = strdup("");
} else {
result = mount_point;
}
}
done:
free(type);
free(location);
if (result != mount_point) free(mount_point);
return result;
}
char* UnmountFn(const char* name, void* cookie, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 1) {
return ErrorAbort(cookie, "%s() expects 1 arg, got %d", name, argc);
}
char* mount_point;
if (ReadArgs(cookie, argv, 1, &mount_point) < 0) {
return NULL;
}
if (strlen(mount_point) == 0) {
ErrorAbort(cookie, "mount_point argument to unmount() can't be empty");
goto done;
}
scan_mounted_volumes();
const MountedVolume* vol = find_mounted_volume_by_mount_point(mount_point);
if (vol == NULL) {
fprintf(stderr, "unmount of %s failed; no such volume\n", mount_point);
result = strdup("");
} else {
unmount_mounted_volume(vol);
result = mount_point;
}
done:
if (result != mount_point) free(mount_point);
return result;
}
// format(type, location)
//
// type="MTD" location=partition
char* FormatFn(const char* name, void* cookie, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 2) {
return ErrorAbort(cookie, "%s() expects 2 args, got %d", name, argc);
}
char* type;
char* location;
if (ReadArgs(cookie, argv, 2, &type, &location) < 0) {
return NULL;
}
if (strlen(type) == 0) {
ErrorAbort(cookie, "type argument to %s() can't be empty", name);
goto done;
}
if (strlen(location) == 0) {
ErrorAbort(cookie, "location argument to %s() can't be empty", name);
goto done;
}
if (strcmp(type, "MTD") == 0) {
mtd_scan_partitions();
const MtdPartition* mtd = mtd_find_partition_by_name(location);
if (mtd == NULL) {
fprintf(stderr, "%s: no mtd partition named \"%s\"",
name, location);
result = strdup("");
goto done;
}
MtdWriteContext* ctx = mtd_write_partition(mtd);
if (ctx == NULL) {
fprintf(stderr, "%s: can't write \"%s\"", name, location);
result = strdup("");
goto done;
}
if (mtd_erase_blocks(ctx, -1) == -1) {
mtd_write_close(ctx);
fprintf(stderr, "%s: failed to erase \"%s\"", name, location);
result = strdup("");
goto done;
}
if (mtd_write_close(ctx) != 0) {
fprintf(stderr, "%s: failed to close \"%s\"", name, location);
result = strdup("");
goto done;
}
result = location;
} else {
fprintf(stderr, "%s: unsupported type \"%s\"", name, type);
}
done:
free(type);
if (result != location) free(location);
return result;
}
char* DeleteFn(const char* name, void* cookie, int argc, Expr* argv[]) {
char** paths = malloc(argc * sizeof(char*));
int i;
for (i = 0; i < argc; ++i) {
paths[i] = Evaluate(cookie, argv[i]);
if (paths[i] == NULL) {
int j;
for (j = 0; j < i; ++i) {
free(paths[j]);
}
free(paths);
return NULL;
}
}
bool recursive = (strcmp(name, "delete_recursive") == 0);
int success = 0;
for (i = 0; i < argc; ++i) {
if ((recursive ? dirUnlinkHierarchy(paths[i]) : unlink(paths[i])) == 0)
++success;
free(paths[i]);
}
free(paths);
char buffer[10];
sprintf(buffer, "%d", success);
return strdup(buffer);
}
char* ShowProgressFn(const char* name, void* cookie, int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(cookie, "%s() expects 2 args, got %d", name, argc);
}
char* frac_str;
char* sec_str;
if (ReadArgs(cookie, argv, 2, &frac_str, &sec_str) < 0) {
return NULL;
}
double frac = strtod(frac_str, NULL);
int sec = strtol(sec_str, NULL, 10);
UpdaterInfo* ui = (UpdaterInfo*)cookie;
fprintf(ui->cmd_pipe, "progress %f %d\n", frac, sec);
free(frac_str);
free(sec_str);
return strdup("");
}
// package_extract package_path destination_path
char* PackageExtractFn(const char* name, void* cookie, int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(cookie, "%s() expects 2 args, got %d", name, argc);
}
char* zip_path;
char* dest_path;
if (ReadArgs(cookie, argv, 2, &zip_path, &dest_path) < 0) return NULL;
ZipArchive* za = ((UpdaterInfo*)cookie)->package_zip;
// To create a consistent system image, never use the clock for timestamps.
struct utimbuf timestamp = { 1217592000, 1217592000 }; // 8/1/2008 default
bool success = mzExtractRecursive(za, zip_path, dest_path,
MZ_EXTRACT_FILES_ONLY, &timestamp,
NULL, NULL);
free(zip_path);
free(dest_path);
return strdup(success ? "t" : "");
}
// symlink target src1 src2 ...
char* SymlinkFn(const char* name, void* cookie, int argc, Expr* argv[]) {
if (argc == 0) {
return ErrorAbort(cookie, "%s() expects 1+ args, got %d", name, argc);
}
char* target;
target = Evaluate(cookie, argv[0]);
if (target == NULL) return NULL;
char** srcs = ReadVarArgs(cookie, argc-1, argv+1);
if (srcs == NULL) {
free(target);
return NULL;
}
int i;
for (i = 0; i < argc-1; ++i) {
symlink(target, srcs[i]);
free(srcs[i]);
}
free(srcs);
return strdup("");
}
char* SetPermFn(const char* name, void* cookie, int argc, Expr* argv[]) {
char* result = NULL;
bool recursive = (strcmp(name, "set_perm_recursive") == 0);
int min_args = 4 + (recursive ? 1 : 0);
if (argc < min_args) {
return ErrorAbort(cookie, "%s() expects %d+ args, got %d", name, argc);
}
char** args = ReadVarArgs(cookie, argc, argv);
if (args == NULL) return NULL;
char* end;
int i;
int uid = strtoul(args[0], &end, 0);
if (*end != '\0' || args[0][0] == 0) {
ErrorAbort(cookie, "%s: \"%s\" not a valid uid", name, args[0]);
goto done;
}
int gid = strtoul(args[1], &end, 0);
if (*end != '\0' || args[1][0] == 0) {
ErrorAbort(cookie, "%s: \"%s\" not a valid gid", name, args[1]);
goto done;
}
if (recursive) {
int dir_mode = strtoul(args[2], &end, 0);
if (*end != '\0' || args[2][0] == 0) {
ErrorAbort(cookie, "%s: \"%s\" not a valid dirmode", name, args[2]);
goto done;
}
int file_mode = strtoul(args[3], &end, 0);
if (*end != '\0' || args[3][0] == 0) {
ErrorAbort(cookie, "%s: \"%s\" not a valid filemode",
name, args[3]);
goto done;
}
for (i = 4; i < argc; ++i) {
dirSetHierarchyPermissions(args[i], uid, gid, dir_mode, file_mode);
}
} else {
int mode = strtoul(args[2], &end, 0);
if (*end != '\0' || args[2][0] == 0) {
ErrorAbort(cookie, "%s: \"%s\" not a valid mode", name, args[2]);
goto done;
}
for (i = 4; i < argc; ++i) {
chown(args[i], uid, gid);
chmod(args[i], mode);
}
}
result = strdup("");
done:
for (i = 0; i < argc; ++i) {
free(args[i]);
}
free(args);
return result;
}
void RegisterInstallFunctions() {
RegisterFunction("mount", MountFn);
RegisterFunction("unmount", UnmountFn);
RegisterFunction("format", FormatFn);
RegisterFunction("show_progress", ShowProgressFn);
RegisterFunction("delete", DeleteFn);
RegisterFunction("delete_recursive", DeleteFn);
RegisterFunction("package_extract", PackageExtractFn);
RegisterFunction("symlink", SymlinkFn);
RegisterFunction("set_perm", SetPermFn);
RegisterFunction("set_perm_recursive", SetPermFn);
}
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