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android_bootable_recovery/updater/install.c
Koushik Dutta 0df56f4db4 wip
2011-11-16 16:00:35 -08:00

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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 <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include "cutils/misc.h"
#include "cutils/properties.h"
#include "edify/expr.h"
#include "mincrypt/sha.h"
#include "minzip/DirUtil.h"
#include "minelf/Retouch.h"
#include "mounts.h"
#include "mtdutils/mtdutils.h"
#include "updater.h"
#include "applypatch/applypatch.h"
#include "flashutils/flashutils.h"
#ifdef USE_EXT4
#include "make_ext4fs.h"
#endif
// mount(fs_type, partition_type, location, mount_point)
//
// fs_type="yaffs2" partition_type="MTD" location=partition
// fs_type="ext4" partition_type="EMMC" location=device
Value* MountFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 4) {
return ErrorAbort(state, "%s() expects 4 args, got %d", name, argc);
}
char* fs_type;
char* partition_type;
char* location;
char* mount_point;
if (ReadArgs(state, argv, 4, &fs_type, &partition_type,
&location, &mount_point) < 0) {
return NULL;
}
if (strlen(fs_type) == 0) {
ErrorAbort(state, "fs_type argument to %s() can't be empty", name);
goto done;
}
if (strlen(partition_type) == 0) {
ErrorAbort(state, "partition_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(partition_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, fs_type, 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, fs_type,
MS_NOATIME | MS_NODEV | MS_NODIRATIME, "") < 0) {
fprintf(stderr, "%s: failed to mount %s at %s: %s\n",
name, location, mount_point, strerror(errno));
result = strdup("");
} else {
result = mount_point;
}
}
done:
free(fs_type);
free(partition_type);
free(location);
if (result != mount_point) free(mount_point);
return StringValue(result);
}
// is_mounted(mount_point)
Value* 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 StringValue(result);
}
Value* 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 StringValue(result);
}
// format(fs_type, partition_type, location, fs_size)
//
// fs_type="yaffs2" partition_type="MTD" location=partition fs_size=<bytes>
// fs_type="ext4" partition_type="EMMC" location=device fs_size=<bytes>
// if fs_size == 0, then make_ext4fs uses the entire partition.
// if fs_size > 0, that is the size to use
// if fs_size < 0, then reserve that many bytes at the end of the partition
Value* FormatFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 4) {
return ErrorAbort(state, "%s() expects 4 args, got %d", name, argc);
}
char* fs_type;
char* partition_type;
char* location;
char* fs_size;
if (ReadArgs(state, argv, 4, &fs_type, &partition_type, &location, &fs_size) < 0) {
return NULL;
}
if (strlen(fs_type) == 0) {
ErrorAbort(state, "fs_type argument to %s() can't be empty", name);
goto done;
}
if (strlen(partition_type) == 0) {
ErrorAbort(state, "partition_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(partition_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;
#ifdef USE_EXT4
} else if (strcmp(fs_type, "ext4") == 0) {
int status = make_ext4fs(location, atoll(fs_size));
if (status != 0) {
fprintf(stderr, "%s: make_ext4fs failed (%d) on %s",
name, status, location);
result = strdup("");
goto done;
}
result = location;
#endif
} else if (strcmp(fs_type, "ext2") == 0) {
int status = format_ext2_device(location);
if (status != 0) {
fprintf(stderr, "%s: format_ext2_device failed (%d) on %s",
name, status, location);
result = strdup("");
goto done;
}
result = location;
} else if (strcmp(fs_type, "ext3") == 0) {
int status = format_ext3_device(location);
if (status != 0) {
fprintf(stderr, "%s: format_ext3_device failed (%d) on %s",
name, status, location);
result = strdup("");
goto done;
}
result = location;
} else {
fprintf(stderr, "%s: unsupported fs_type \"%s\" partition_type \"%s\"",
name, fs_type, partition_type);
}
done:
free(fs_type);
free(partition_type);
if (result != location) free(location);
return StringValue(result);
}
Value* 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 StringValue(strdup(buffer));
}
Value* 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(sec_str);
return StringValue(frac_str);
}
Value* SetProgressFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 1) {
return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc);
}
char* frac_str;
if (ReadArgs(state, argv, 1, &frac_str) < 0) {
return NULL;
}
double frac = strtod(frac_str, NULL);
UpdaterInfo* ui = (UpdaterInfo*)(state->cookie);
fprintf(ui->cmd_pipe, "set_progress %f\n", frac);
return StringValue(frac_str);
}
// package_extract_dir(package_path, destination_path)
Value* 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 StringValue(strdup(success ? "t" : ""));
}
// package_extract_file(package_path, destination_path)
// or
// package_extract_file(package_path)
// to return the entire contents of the file as the result of this
// function (the char* returned is actually a FileContents*).
Value* PackageExtractFileFn(const char* name, State* state,
int argc, Expr* argv[]) {
if (argc != 1 && argc != 2) {
return ErrorAbort(state, "%s() expects 1 or 2 args, got %d",
name, argc);
}
bool success = false;
if (argc == 2) {
// The two-argument version extracts to a file.
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;
const ZipEntry* entry = mzFindZipEntry(za, zip_path);
if (entry == NULL) {
fprintf(stderr, "%s: no %s in package\n", name, zip_path);
goto done2;
}
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 done2;
}
success = mzExtractZipEntryToFile(za, entry, fileno(f));
fclose(f);
done2:
free(zip_path);
free(dest_path);
return StringValue(strdup(success ? "t" : ""));
} else {
// The one-argument version returns the contents of the file
// as the result.
char* zip_path;
Value* v = malloc(sizeof(Value));
v->type = VAL_BLOB;
v->size = -1;
v->data = NULL;
if (ReadArgs(state, argv, 1, &zip_path) < 0) return NULL;
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 done1;
}
v->size = mzGetZipEntryUncompLen(entry);
v->data = malloc(v->size);
if (v->data == NULL) {
fprintf(stderr, "%s: failed to allocate %ld bytes for %s\n",
name, (long)v->size, zip_path);
goto done1;
}
success = mzExtractZipEntryToBuffer(za, entry,
(unsigned char *)v->data);
done1:
free(zip_path);
if (!success) {
free(v->data);
v->data = NULL;
v->size = -1;
}
return v;
}
}
// retouch_binaries(lib1, lib2, ...)
Value* RetouchBinariesFn(const char* name, State* state,
int argc, Expr* argv[]) {
UpdaterInfo* ui = (UpdaterInfo*)(state->cookie);
char **retouch_entries = ReadVarArgs(state, argc, argv);
if (retouch_entries == NULL) {
return StringValue(strdup("t"));
}
// some randomness from the clock
int32_t override_base;
bool override_set = false;
int32_t random_base = time(NULL) % 1024;
// some more randomness from /dev/random
FILE *f_random = fopen("/dev/random", "rb");
uint16_t random_bits = 0;
if (f_random != NULL) {
fread(&random_bits, 2, 1, f_random);
random_bits = random_bits % 1024;
fclose(f_random);
}
random_base = (random_base + random_bits) % 1024;
fprintf(ui->cmd_pipe, "ui_print Random offset: 0x%x\n", random_base);
fprintf(ui->cmd_pipe, "ui_print\n");
// make sure we never randomize to zero; this let's us look at a file
// and know for sure whether it has been processed; important in the
// crash recovery process
if (random_base == 0) random_base = 1;
// make sure our randomization is page-aligned
random_base *= -0x1000;
override_base = random_base;
int i = 0;
bool success = true;
while (i < (argc - 1)) {
success = success && retouch_one_library(retouch_entries[i],
retouch_entries[i+1],
random_base,
override_set ?
NULL :
&override_base);
if (!success)
ErrorAbort(state, "Failed to retouch '%s'.", retouch_entries[i]);
free(retouch_entries[i]);
free(retouch_entries[i+1]);
i += 2;
if (success && override_base != 0) {
random_base = override_base;
override_set = true;
}
}
if (i < argc) {
free(retouch_entries[i]);
success = false;
}
free(retouch_entries);
if (!success) {
Value* v = malloc(sizeof(Value));
v->type = VAL_STRING;
v->data = NULL;
v->size = -1;
return v;
}
return StringValue(strdup("t"));
}
// undo_retouch_binaries(lib1, lib2, ...)
Value* UndoRetouchBinariesFn(const char* name, State* state,
int argc, Expr* argv[]) {
UpdaterInfo* ui = (UpdaterInfo*)(state->cookie);
char **retouch_entries = ReadVarArgs(state, argc, argv);
if (retouch_entries == NULL) {
return StringValue(strdup("t"));
}
int i = 0;
bool success = true;
int32_t override_base;
while (i < (argc-1)) {
success = success && retouch_one_library(retouch_entries[i],
retouch_entries[i+1],
0 /* undo => offset==0 */,
NULL);
if (!success)
ErrorAbort(state, "Failed to unretouch '%s'.",
retouch_entries[i]);
free(retouch_entries[i]);
free(retouch_entries[i+1]);
i += 2;
}
if (i < argc) {
free(retouch_entries[i]);
success = false;
}
free(retouch_entries);
if (!success) {
Value* v = malloc(sizeof(Value));
v->type = VAL_STRING;
v->data = NULL;
v->size = -1;
return v;
}
return StringValue(strdup("t"));
}
// symlink target src1 src2 ...
// unlinks any previously existing src1, src2, etc before creating symlinks.
Value* 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) {
if (unlink(srcs[i]) < 0) {
if (errno != ENOENT) {
fprintf(stderr, "%s: failed to remove %s: %s\n",
name, srcs[i], strerror(errno));
}
}
if (symlink(target, srcs[i]) < 0) {
fprintf(stderr, "%s: failed to symlink %s to %s: %s\n",
name, srcs[i], target, strerror(errno));
}
free(srcs[i]);
}
free(srcs);
return StringValue(strdup(""));
}
Value* 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 = 3; i < argc; ++i) {
if (chown(args[i], uid, gid) < 0) {
fprintf(stderr, "%s: chown of %s to %d %d failed: %s\n",
name, args[i], uid, gid, strerror(errno));
}
if (chmod(args[i], mode) < 0) {
fprintf(stderr, "%s: chmod of %s to %o failed: %s\n",
name, args[i], mode, strerror(errno));
}
}
}
result = strdup("");
done:
for (i = 0; i < argc; ++i) {
free(args[i]);
}
free(args);
return StringValue(result);
}
Value* 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 StringValue(strdup(value));
}
// file_getprop(file, key)
//
// interprets 'file' as a getprop-style file (key=value pairs, one
// per line, # comment lines and blank lines okay), and returns the value
// for 'key' (or "" if it isn't defined).
Value* FileGetPropFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
char* buffer = NULL;
char* filename;
char* key;
if (ReadArgs(state, argv, 2, &filename, &key) < 0) {
return NULL;
}
struct stat st;
if (stat(filename, &st) < 0) {
ErrorAbort(state, "%s: failed to stat \"%s\": %s",
name, filename, strerror(errno));
goto done;
}
#define MAX_FILE_GETPROP_SIZE 65536
if (st.st_size > MAX_FILE_GETPROP_SIZE) {
ErrorAbort(state, "%s too large for %s (max %d)",
filename, name, MAX_FILE_GETPROP_SIZE);
goto done;
}
buffer = malloc(st.st_size+1);
if (buffer == NULL) {
ErrorAbort(state, "%s: failed to alloc %d bytes", name, st.st_size+1);
goto done;
}
FILE* f = fopen(filename, "rb");
if (f == NULL) {
ErrorAbort(state, "%s: failed to open %s: %s",
name, filename, strerror(errno));
goto done;
}
if (fread(buffer, 1, st.st_size, f) != st.st_size) {
ErrorAbort(state, "%s: failed to read %d bytes from %s",
name, st.st_size+1, filename);
fclose(f);
goto done;
}
buffer[st.st_size] = '\0';
fclose(f);
char* line = strtok(buffer, "\n");
do {
// skip whitespace at start of line
while (*line && isspace(*line)) ++line;
// comment or blank line: skip to next line
if (*line == '\0' || *line == '#') continue;
char* equal = strchr(line, '=');
if (equal == NULL) {
ErrorAbort(state, "%s: malformed line \"%s\": %s not a prop file?",
name, line, filename);
goto done;
}
// trim whitespace between key and '='
char* key_end = equal-1;
while (key_end > line && isspace(*key_end)) --key_end;
key_end[1] = '\0';
// not the key we're looking for
if (strcmp(key, line) != 0) continue;
// skip whitespace after the '=' to the start of the value
char* val_start = equal+1;
while(*val_start && isspace(*val_start)) ++val_start;
// trim trailing whitespace
char* val_end = val_start + strlen(val_start)-1;
while (val_end > val_start && isspace(*val_end)) --val_end;
val_end[1] = '\0';
result = strdup(val_start);
break;
} while ((line = strtok(NULL, "\n")));
if (result == NULL) result = strdup("");
done:
free(filename);
free(key);
free(buffer);
return StringValue(result);
}
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(filename_or_blob, partition)
Value* WriteRawImageFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
Value* partition_value;
Value* contents;
if (ReadValueArgs(state, argv, 2, &contents, &partition_value) < 0) {
return NULL;
}
if (partition_value->type != VAL_STRING) {
ErrorAbort(state, "partition argument to %s must be string", name);
goto done;
}
char* partition = partition_value->data;
if (strlen(partition) == 0) {
ErrorAbort(state, "partition argument to %s can't be empty", name);
goto done;
}
if (contents->type == VAL_STRING && strlen((char*) contents->data) == 0) {
ErrorAbort(state, "file argument to %s can't be empty", name);
goto done;
}
if (0 == restore_raw_partition(NULL, partition, filename))
result = strdup(partition);
else
result = strdup("");
goto done;
}
done:
if (result != partition) FreeValue(partition_value);
FreeValue(contents);
return StringValue(result);
}
// apply_patch_space(bytes)
Value* ApplyPatchSpaceFn(const char* name, State* state,
int argc, Expr* argv[]) {
char* bytes_str;
if (ReadArgs(state, argv, 1, &bytes_str) < 0) {
return NULL;
}
char* endptr;
size_t bytes = strtol(bytes_str, &endptr, 10);
if (bytes == 0 && endptr == bytes_str) {
ErrorAbort(state, "%s(): can't parse \"%s\" as byte count\n\n",
name, bytes_str);
free(bytes_str);
return NULL;
}
return StringValue(strdup(CacheSizeCheck(bytes) ? "" : "t"));
}
// apply_patch(srcfile, tgtfile, tgtsha1, tgtsize, sha1_1, patch_1, ...)
Value* ApplyPatchFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc < 6 || (argc % 2) == 1) {
return ErrorAbort(state, "%s(): expected at least 6 args and an "
"even number, got %d",
name, argc);
}
char* source_filename;
char* target_filename;
char* target_sha1;
char* target_size_str;
if (ReadArgs(state, argv, 4, &source_filename, &target_filename,
&target_sha1, &target_size_str) < 0) {
return NULL;
}
char* endptr;
size_t target_size = strtol(target_size_str, &endptr, 10);
if (target_size == 0 && endptr == target_size_str) {
ErrorAbort(state, "%s(): can't parse \"%s\" as byte count",
name, target_size_str);
free(source_filename);
free(target_filename);
free(target_sha1);
free(target_size_str);
return NULL;
}
int patchcount = (argc-4) / 2;
Value** patches = ReadValueVarArgs(state, argc-4, argv+4);
int i;
for (i = 0; i < patchcount; ++i) {
if (patches[i*2]->type != VAL_STRING) {
ErrorAbort(state, "%s(): sha-1 #%d is not string", name, i);
break;
}
if (patches[i*2+1]->type != VAL_BLOB) {
ErrorAbort(state, "%s(): patch #%d is not blob", name, i);
break;
}
}
if (i != patchcount) {
for (i = 0; i < patchcount*2; ++i) {
FreeValue(patches[i]);
}
free(patches);
return NULL;
}
char** patch_sha_str = malloc(patchcount * sizeof(char*));
for (i = 0; i < patchcount; ++i) {
patch_sha_str[i] = patches[i*2]->data;
patches[i*2]->data = NULL;
FreeValue(patches[i*2]);
patches[i] = patches[i*2+1];
}
int result = applypatch(source_filename, target_filename,
target_sha1, target_size,
patchcount, patch_sha_str, patches);
for (i = 0; i < patchcount; ++i) {
FreeValue(patches[i]);
}
free(patch_sha_str);
free(patches);
return StringValue(strdup(result == 0 ? "t" : ""));
}
// apply_patch_check(file, [sha1_1, ...])
Value* ApplyPatchCheckFn(const char* name, State* state,
int argc, Expr* argv[]) {
if (argc < 1) {
return ErrorAbort(state, "%s(): expected at least 1 arg, got %d",
name, argc);
}
char* filename;
if (ReadArgs(state, argv, 1, &filename) < 0) {
return NULL;
}
int patchcount = argc-1;
char** sha1s = ReadVarArgs(state, argc-1, argv+1);
int result = applypatch_check(filename, patchcount, sha1s);
int i;
for (i = 0; i < patchcount; ++i) {
free(sha1s[i]);
}
free(sha1s);
return StringValue(strdup(result == 0 ? "t" : ""));
}
Value* 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 StringValue(buffer);
}
Value* RunProgramFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc < 1) {
return ErrorAbort(state, "%s() expects at least 1 arg", name);
}
char** args = ReadVarArgs(state, argc, argv);
if (args == NULL) {
return NULL;
}
char** args2 = malloc(sizeof(char*) * (argc+1));
memcpy(args2, args, sizeof(char*) * argc);
args2[argc] = NULL;
fprintf(stderr, "about to run program [%s] with %d args\n", args2[0], argc);
pid_t child = fork();
if (child == 0) {
execv(args2[0], args2);
fprintf(stderr, "run_program: execv failed: %s\n", strerror(errno));
_exit(1);
}
int status;
waitpid(child, &status, 0);
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0) {
fprintf(stderr, "run_program: child exited with status %d\n",
WEXITSTATUS(status));
}
} else if (WIFSIGNALED(status)) {
fprintf(stderr, "run_program: child terminated by signal %d\n",
WTERMSIG(status));
}
int i;
for (i = 0; i < argc; ++i) {
free(args[i]);
}
free(args);
free(args2);
char buffer[20];
sprintf(buffer, "%d", status);
return StringValue(strdup(buffer));
}
// Take a sha-1 digest and return it as a newly-allocated hex string.
static char* PrintSha1(uint8_t* digest) {
char* buffer = malloc(SHA_DIGEST_SIZE*2 + 1);
int i;
const char* alphabet = "0123456789abcdef";
for (i = 0; i < SHA_DIGEST_SIZE; ++i) {
buffer[i*2] = alphabet[(digest[i] >> 4) & 0xf];
buffer[i*2+1] = alphabet[digest[i] & 0xf];
}
buffer[i*2] = '\0';
return buffer;
}
// sha1_check(data)
// to return the sha1 of the data (given in the format returned by
// read_file).
//
// sha1_check(data, sha1_hex, [sha1_hex, ...])
// returns the sha1 of the file if it matches any of the hex
// strings passed, or "" if it does not equal any of them.
//
Value* Sha1CheckFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc < 1) {
return ErrorAbort(state, "%s() expects at least 1 arg", name);
}
Value** args = ReadValueVarArgs(state, argc, argv);
if (args == NULL) {
return NULL;
}
if (args[0]->size < 0) {
fprintf(stderr, "%s(): no file contents received", name);
return StringValue(strdup(""));
}
uint8_t digest[SHA_DIGEST_SIZE];
SHA(args[0]->data, args[0]->size, digest);
FreeValue(args[0]);
if (argc == 1) {
return StringValue(PrintSha1(digest));
}
int i;
uint8_t* arg_digest = malloc(SHA_DIGEST_SIZE);
for (i = 1; i < argc; ++i) {
if (args[i]->type != VAL_STRING) {
fprintf(stderr, "%s(): arg %d is not a string; skipping",
name, i);
} else if (ParseSha1(args[i]->data, arg_digest) != 0) {
// Warn about bad args and skip them.
fprintf(stderr, "%s(): error parsing \"%s\" as sha-1; skipping",
name, args[i]->data);
} else if (memcmp(digest, arg_digest, SHA_DIGEST_SIZE) == 0) {
break;
}
FreeValue(args[i]);
}
if (i >= argc) {
// Didn't match any of the hex strings; return false.
return StringValue(strdup(""));
}
// Found a match; free all the remaining arguments and return the
// matched one.
int j;
for (j = i+1; j < argc; ++j) {
FreeValue(args[j]);
}
return args[i];
}
// Read a local file and return its contents (the Value* returned
// is actually a FileContents*).
Value* ReadFileFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 1) {
return ErrorAbort(state, "%s() expects 1 arg, got %d", name, argc);
}
char* filename;
if (ReadArgs(state, argv, 1, &filename) < 0) return NULL;
Value* v = malloc(sizeof(Value));
v->type = VAL_BLOB;
FileContents fc;
if (LoadFileContents(filename, &fc, RETOUCH_DONT_MASK) != 0) {
ErrorAbort(state, "%s() loading \"%s\" failed: %s",
name, filename, strerror(errno));
free(filename);
free(v);
free(fc.data);
return NULL;
}
v->size = fc.size;
v->data = (char*)fc.data;
free(filename);
return v;
}
void RegisterInstallFunctions() {
RegisterFunction("mount", MountFn);
RegisterFunction("is_mounted", IsMountedFn);
RegisterFunction("unmount", UnmountFn);
RegisterFunction("format", FormatFn);
RegisterFunction("show_progress", ShowProgressFn);
RegisterFunction("set_progress", SetProgressFn);
RegisterFunction("delete", DeleteFn);
RegisterFunction("delete_recursive", DeleteFn);
RegisterFunction("package_extract_dir", PackageExtractDirFn);
RegisterFunction("package_extract_file", PackageExtractFileFn);
RegisterFunction("retouch_binaries", RetouchBinariesFn);
RegisterFunction("undo_retouch_binaries", UndoRetouchBinariesFn);
RegisterFunction("symlink", SymlinkFn);
RegisterFunction("set_perm", SetPermFn);
RegisterFunction("set_perm_recursive", SetPermFn);
RegisterFunction("getprop", GetPropFn);
RegisterFunction("file_getprop", FileGetPropFn);
RegisterFunction("write_raw_image", WriteRawImageFn);
RegisterFunction("apply_patch", ApplyPatchFn);
RegisterFunction("apply_patch_check", ApplyPatchCheckFn);
RegisterFunction("apply_patch_space", ApplyPatchSpaceFn);
RegisterFunction("read_file", ReadFileFn);
RegisterFunction("sha1_check", Sha1CheckFn);
RegisterFunction("ui_print", UIPrintFn);
RegisterFunction("run_program", RunProgramFn);
}
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