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android_bootable_recovery/updater/install.c
Doug Zongker d9c9d10d9d fixes to edify and updater script 
A few more changes to edify:

  - fix write_raw_image(); my last change neglected to close the write
    context, so the written image was corrupt.

  - each expression tracks the span of the source code from which it
    was compiled, so that assert()'s error message can include the
    source of the expression that failed.

  - the 'cookie' argument to each Function is replaced with a State
    object, which contains the cookie, the source script (for use with
    the above spans), and the current error message (replacing the
    global variables that were used for this purpose).

  - in the recovery image, a new command "ui_print" can be sent back
    through the command pipe to cause text to appear on the screen.
    Add a new ui_print() function to print things from scripts.
    Rename existing "print" function to "stdout".
2009-06-12 14:05:03 -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 "cutils/misc.h"
#include "cutils/properties.h"
#include "edify/expr.h"
#include "minzip/DirUtil.h"
#include "mtdutils/mounts.h"
#include "mtdutils/mtdutils.h"
#include "updater.h"
char* ErrorAbort(State* state, char* format, ...) {
char* buffer = malloc(4096);
va_list v;
va_start(v, format);
vsnprintf(buffer, 4096, format, v);
va_end(v);
free(state->errmsg);
state->errmsg = 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, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 3) {
return ErrorAbort(state, "%s() expects 3 args, got %d", name, argc);
}
char* type;
char* location;
char* mount_point;
if (ReadArgs(state, argv, 3, &type, &location, &mount_point) < 0) {
return NULL;
}
if (strlen(type) == 0) {
ErrorAbort(state, "type argument to %s() can't be empty", name);
goto done;
}
if (strlen(location) == 0) {
ErrorAbort(state, "location argument to %s() can't be empty", name);
goto done;
}
if (strlen(mount_point) == 0) {
ErrorAbort(state, "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;
}
// is_mounted(mount_point)
char* IsMountedFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 1) {
return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc);
}
char* mount_point;
if (ReadArgs(state, argv, 1, &mount_point) < 0) {
return NULL;
}
if (strlen(mount_point) == 0) {
ErrorAbort(state, "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) {
result = strdup("");
} else {
result = mount_point;
}
done:
if (result != mount_point) free(mount_point);
return result;
}
char* UnmountFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 1) {
return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc);
}
char* mount_point;
if (ReadArgs(state, argv, 1, &mount_point) < 0) {
return NULL;
}
if (strlen(mount_point) == 0) {
ErrorAbort(state, "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, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* type;
char* location;
if (ReadArgs(state, argv, 2, &type, &location) < 0) {
return NULL;
}
if (strlen(type) == 0) {
ErrorAbort(state, "type argument to %s() can't be empty", name);
goto done;
}
if (strlen(location) == 0) {
ErrorAbort(state, "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, State* state, int argc, Expr* argv[]) {
char** paths = malloc(argc * sizeof(char*));
int i;
for (i = 0; i < argc; ++i) {
paths[i] = Evaluate(state, 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, State* state, int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* frac_str;
char* sec_str;
if (ReadArgs(state, 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*)(state->cookie);
fprintf(ui->cmd_pipe, "progress %f %d\n", frac, sec);
free(frac_str);
free(sec_str);
return strdup("");
}
// package_extract_dir(package_path, destination_path)
char* PackageExtractDirFn(const char* name, State* state,
int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* zip_path;
char* dest_path;
if (ReadArgs(state, argv, 2, &zip_path, &dest_path) < 0) return NULL;
ZipArchive* za = ((UpdaterInfo*)(state->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" : "");
}
// package_extract_file(package_path, destination_path)
char* PackageExtractFileFn(const char* name, State* state,
int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* zip_path;
char* dest_path;
if (ReadArgs(state, argv, 2, &zip_path, &dest_path) < 0) return NULL;
bool success = false;
ZipArchive* za = ((UpdaterInfo*)(state->cookie))->package_zip;
const ZipEntry* entry = mzFindZipEntry(za, zip_path);
if (entry == NULL) {
fprintf(stderr, "%s: no %s in package\n", name, zip_path);
goto done;
}
FILE* f = fopen(dest_path, "wb");
if (f == NULL) {
fprintf(stderr, "%s: can't open %s for write: %s\n",
name, dest_path, strerror(errno));
goto done;
}
success = mzExtractZipEntryToFile(za, entry, fileno(f));
fclose(f);
done:
free(zip_path);
free(dest_path);
return strdup(success ? "t" : "");
}
// symlink target src1 src2 ...
char* SymlinkFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc == 0) {
return ErrorAbort(state, "%s() expects 1+ args, got %d", name, argc);
}
char* target;
target = Evaluate(state, argv[0]);
if (target == NULL) return NULL;
char** srcs = ReadVarArgs(state, 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, State* state, 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(state, "%s() expects %d+ args, got %d", name, argc);
}
char** args = ReadVarArgs(state, 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(state, "%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(state, "%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(state, "%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(state, "%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(state, "%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;
}
char* GetPropFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 1) {
return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc);
}
char* key;
key = Evaluate(state, argv[0]);
if (key == NULL) return NULL;
char value[PROPERTY_VALUE_MAX];
property_get(key, value, "");
free(key);
return strdup(value);
}
static bool write_raw_image_cb(const unsigned char* data,
int data_len, void* ctx) {
int r = mtd_write_data((MtdWriteContext*)ctx, (const char *)data, data_len);
if (r == data_len) return true;
fprintf(stderr, "%s\n", strerror(errno));
return false;
}
// write_raw_image(file, partition)
char* WriteRawImageFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
char* partition;
char* filename;
if (ReadArgs(state, argv, 2, &filename, &partition) < 0) {
return NULL;
}
if (strlen(partition) == 0) {
ErrorAbort(state, "partition argument to %s can't be empty", name);
goto done;
}
if (strlen(filename) == 0) {
ErrorAbort(state, "file argument to %s can't be empty", name);
goto done;
}
mtd_scan_partitions();
const MtdPartition* mtd = mtd_find_partition_by_name(partition);
if (mtd == NULL) {
fprintf(stderr, "%s: no mtd partition named \"%s\"\n", name, partition);
result = strdup("");
goto done;
}
MtdWriteContext* ctx = mtd_write_partition(mtd);
if (ctx == NULL) {
fprintf(stderr, "%s: can't write mtd partition \"%s\"\n",
name, partition);
result = strdup("");
goto done;
}
bool success;
FILE* f = fopen(filename, "rb");
if (f == NULL) {
fprintf(stderr, "%s: can't open %s: %s\n",
name, filename, strerror(errno));
result = strdup("");
goto done;
}
success = true;
char* buffer = malloc(BUFSIZ);
int read;
while (success && (read = fread(buffer, 1, BUFSIZ, f)) > 0) {
int wrote = mtd_write_data(ctx, buffer, read);
success = success && (wrote == read);
if (!success) {
fprintf(stderr, "mtd_write_data to %s failed: %s\n",
partition, strerror(errno));
}
}
free(buffer);
fclose(f);
if (mtd_erase_blocks(ctx, -1) == -1) {
fprintf(stderr, "%s: error erasing blocks of %s\n", name, partition);
}
if (mtd_write_close(ctx) != 0) {
fprintf(stderr, "%s: error closing write of %s\n", name, partition);
}
printf("%s %s partition from %s\n",
success ? "wrote" : "failed to write", partition, filename);
result = success ? partition : strdup("");
done:
if (result != partition) free(partition);
free(filename);
return result;
}
// write_firmware_image(file, partition)
//
// partition is "radio" or "hboot"
// file is not used until after updater exits
//
// TODO: this should live in some HTC-specific library
char* WriteFirmwareImageFn(const char* name, State* state,
int argc, Expr* argv[]) {
char* result = NULL;
char* partition;
char* filename;
if (ReadArgs(state, argv, 2, &filename, &partition) < 0) {
return NULL;
}
if (strlen(partition) == 0) {
ErrorAbort(state, "partition argument to %s can't be empty", name);
goto done;
}
if (strlen(filename) == 0) {
ErrorAbort(state, "file argument to %s can't be empty", name);
goto done;
}
FILE* cmd = ((UpdaterInfo*)(state->cookie))->cmd_pipe;
fprintf(cmd, "firmware %s %s\n", partition, filename);
printf("will write %s firmware from %s\n", partition, filename);
result = partition;
done:
if (result != partition) free(partition);
free(filename);
return result;
}
extern int applypatch(int argc, char** argv);
// apply_patch(srcfile, tgtfile, tgtsha1, tgtsize, sha1:patch, ...)
// apply_patch_check(file, sha1, ...)
// apply_patch_space(bytes)
char* ApplyPatchFn(const char* name, State* state, int argc, Expr* argv[]) {
printf("in applypatchfn (%s)\n", name);
char* prepend = NULL;
if (strstr(name, "check") != NULL) {
prepend = "-c";
} else if (strstr(name, "space") != NULL) {
prepend = "-s";
}
char** args = ReadVarArgs(state, argc, argv);
if (args == NULL) return NULL;
// insert the "program name" argv[0] and a copy of the "prepend"
// string (if any) at the start of the args.
int extra = 1 + (prepend != NULL ? 1 : 0);
char** temp = malloc((argc+extra) * sizeof(char*));
memcpy(temp+extra, args, argc * sizeof(char*));
temp[0] = strdup("updater");
if (prepend) {
temp[1] = strdup(prepend);
}
free(args);
args = temp;
argc += extra;
printf("calling applypatch\n");
fflush(stdout);
int result = applypatch(argc, args);
printf("applypatch returned %d\n", result);
int i;
for (i = 0; i < argc; ++i) {
free(args[i]);
}
free(args);
switch (result) {
case 0: return strdup("t");
case 1: return strdup("");
default: return ErrorAbort(state, "applypatch couldn't parse args");
}
}
char* UIPrintFn(const char* name, State* state, int argc, Expr* argv[]) {
char** args = ReadVarArgs(state, argc, argv);
if (args == NULL) {
return NULL;
}
int size = 0;
int i;
for (i = 0; i < argc; ++i) {
size += strlen(args[i]);
}
char* buffer = malloc(size+1);
size = 0;
for (i = 0; i < argc; ++i) {
strcpy(buffer+size, args[i]);
size += strlen(args[i]);
free(args[i]);
}
free(args);
buffer[size] = '\0';
char* line = strtok(buffer, "\n");
while (line) {
fprintf(((UpdaterInfo*)(state->cookie))->cmd_pipe,
"ui_print %s\n", line);
line = strtok(NULL, "\n");
}
fprintf(((UpdaterInfo*)(state->cookie))->cmd_pipe, "ui_print\n");
return buffer;
}
void RegisterInstallFunctions() {
RegisterFunction("mount", MountFn);
RegisterFunction("is_mounted", IsMountedFn);
RegisterFunction("unmount", UnmountFn);
RegisterFunction("format", FormatFn);
RegisterFunction("show_progress", ShowProgressFn);
RegisterFunction("delete", DeleteFn);
RegisterFunction("delete_recursive", DeleteFn);
RegisterFunction("package_extract_dir", PackageExtractDirFn);
RegisterFunction("package_extract_file", PackageExtractFileFn);
RegisterFunction("symlink", SymlinkFn);
RegisterFunction("set_perm", SetPermFn);
RegisterFunction("set_perm_recursive", SetPermFn);
RegisterFunction("getprop", GetPropFn);
RegisterFunction("write_raw_image", WriteRawImageFn);
RegisterFunction("write_firmware_image", WriteFirmwareImageFn);
RegisterFunction("apply_patch", ApplyPatchFn);
RegisterFunction("apply_patch_check", ApplyPatchFn);
RegisterFunction("apply_patch_space", ApplyPatchFn);
RegisterFunction("ui_print", UIPrintFn);
}
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