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eef053fda1ed84b71f245dfe2890fd35c2ffe3bc
android_bootable_recovery/updater/install.cpp
Alistair Strachan 733285fea2 updater, minzip: Remove unnecessary O_SYNC flags. 
Remove O_SYNC from mzExtractRecursive() and PackageExtractFileFn().
These functions deal with extracting whole files from the update
package onto a filesystem. If run on ext4 on a rotating disk, for
example, the O_SYNC flag will cause serious performance problems
and the extraction proecss can take over 30 minutes, with no
obvious benefits.

This API function already calls fsync(fd) after each file is
extracted to ensure data and metadata is written to the underlying
block device, so the O_SYNC calls should be superfluous and safely
removable.

This change does not affect the OTA patch paths or any modification
of the bootloader partition or writes to other 'emmc' partitions.

Signed-off-by: Alistair Strachan <alistair.strachan@imgtec.com>
Change-Id: I9cbb98a98e6278bf5c0d7efaae340773d1fbfcd2
2016-05-05 16:04:58 -07:00

1635 lines
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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 <ftw.h>
#include <sys/capability.h>
#include <sys/xattr.h>
#include <linux/xattr.h>
#include <inttypes.h>
#include <memory>
#include <vector>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <selinux/label.h>
#include <selinux/selinux.h>
#include "bootloader.h"
#include "applypatch/applypatch.h"
#include "cutils/android_reboot.h"
#include "cutils/misc.h"
#include "cutils/properties.h"
#include "edify/expr.h"
#include "openssl/sha.h"
#include "minzip/DirUtil.h"
#include "mtdutils/mounts.h"
#include "mtdutils/mtdutils.h"
#include "ota_io.h"
#include "updater.h"
#include "install.h"
#include "tune2fs.h"
#ifdef USE_EXT4
#include "make_ext4fs.h"
#include "wipe.h"
#endif
// Send over the buffer to recovery though the command pipe.
static void uiPrint(State* state, const std::string& buffer) {
UpdaterInfo* ui = reinterpret_cast<UpdaterInfo*>(state->cookie);
// "line1\nline2\n" will be split into 3 tokens: "line1", "line2" and "".
// So skip sending empty strings to UI.
std::vector<std::string> lines = android::base::Split(buffer, "\n");
for (auto& line: lines) {
if (!line.empty()) {
fprintf(ui->cmd_pipe, "ui_print %s\n", line.c_str());
fprintf(ui->cmd_pipe, "ui_print\n");
}
}
// On the updater side, we need to dump the contents to stderr (which has
// been redirected to the log file). Because the recovery will only print
// the contents to screen when processing pipe command ui_print.
fprintf(stderr, "%s", buffer.c_str());
}
__attribute__((__format__(printf, 2, 3))) __nonnull((2))
void uiPrintf(State* state, const char* format, ...) {
std::string error_msg;
va_list ap;
va_start(ap, format);
android::base::StringAppendV(&error_msg, format, ap);
va_end(ap);
uiPrint(state, error_msg);
}
// Take a sha-1 digest and return it as a newly-allocated hex string.
char* PrintSha1(const uint8_t* digest) {
char* buffer = reinterpret_cast<char*>(malloc(SHA_DIGEST_LENGTH*2 + 1));
const char* alphabet = "0123456789abcdef";
size_t i;
for (i = 0; i < SHA_DIGEST_LENGTH; ++i) {
buffer[i*2] = alphabet[(digest[i] >> 4) & 0xf];
buffer[i*2+1] = alphabet[digest[i] & 0xf];
}
buffer[i*2] = '\0';
return buffer;
}
// 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 && argc != 5) {
return ErrorAbort(state, "%s() expects 4-5 args, got %d", name, argc);
}
char* fs_type;
char* partition_type;
char* location;
char* mount_point;
char* mount_options;
bool has_mount_options;
if (argc == 5) {
has_mount_options = true;
if (ReadArgs(state, argv, 5, &fs_type, &partition_type,
&location, &mount_point, &mount_options) < 0) {
return NULL;
}
} else {
has_mount_options = false;
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;
}
{
char *secontext = NULL;
if (sehandle) {
selabel_lookup(sehandle, &secontext, mount_point, 0755);
setfscreatecon(secontext);
}
mkdir(mount_point, 0755);
if (secontext) {
freecon(secontext);
setfscreatecon(NULL);
}
}
if (strcmp(partition_type, "MTD") == 0) {
mtd_scan_partitions();
const MtdPartition* mtd;
mtd = mtd_find_partition_by_name(location);
if (mtd == NULL) {
uiPrintf(state, "%s: no mtd partition named \"%s\"\n",
name, location);
result = strdup("");
goto done;
}
if (mtd_mount_partition(mtd, mount_point, fs_type, 0 /* rw */) != 0) {
uiPrintf(state, "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,
has_mount_options ? mount_options : "") < 0) {
uiPrintf(state, "%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);
if (has_mount_options) free(mount_options);
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) {
uiPrintf(state, "unmount of %s failed; no such volume\n", mount_point);
result = strdup("");
} else {
int ret = unmount_mounted_volume(vol);
if (ret != 0) {
uiPrintf(state, "unmount of %s failed (%d): %s\n",
mount_point, ret, strerror(errno));
}
result = mount_point;
}
}
done:
if (result != mount_point) free(mount_point);
return StringValue(result);
}
static int exec_cmd(const char* path, char* const argv[]) {
int status;
pid_t child;
if ((child = vfork()) == 0) {
execv(path, argv);
_exit(-1);
}
waitpid(child, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
printf("%s failed with status %d\n", path, WEXITSTATUS(status));
}
return WEXITSTATUS(status);
}
// format(fs_type, partition_type, location, fs_size, mount_point)
//
// fs_type="yaffs2" partition_type="MTD" location=partition fs_size=<bytes> mount_point=<location>
// fs_type="ext4" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location>
// fs_type="f2fs" partition_type="EMMC" location=device fs_size=<bytes> mount_point=<location>
// if fs_size == 0, then make fs 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 (not for "f2fs")
Value* FormatFn(const char* name, State* state, int argc, Expr* argv[]) {
char* result = NULL;
if (argc != 5) {
return ErrorAbort(state, "%s() expects 5 args, got %d", name, argc);
}
char* fs_type;
char* partition_type;
char* location;
char* fs_size;
char* mount_point;
if (ReadArgs(state, argv, 5, &fs_type, &partition_type, &location, &fs_size, &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;
}
if (strcmp(partition_type, "MTD") == 0) {
mtd_scan_partitions();
const MtdPartition* mtd = mtd_find_partition_by_name(location);
if (mtd == NULL) {
printf("%s: no mtd partition named \"%s\"",
name, location);
result = strdup("");
goto done;
}
MtdWriteContext* ctx = mtd_write_partition(mtd);
if (ctx == NULL) {
printf("%s: can't write \"%s\"", name, location);
result = strdup("");
goto done;
}
if (mtd_erase_blocks(ctx, -1) == -1) {
mtd_write_close(ctx);
printf("%s: failed to erase \"%s\"", name, location);
result = strdup("");
goto done;
}
if (mtd_write_close(ctx) != 0) {
printf("%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), mount_point, sehandle);
if (status != 0) {
printf("%s: make_ext4fs failed (%d) on %s",
name, status, location);
result = strdup("");
goto done;
}
result = location;
} else if (strcmp(fs_type, "f2fs") == 0) {
char *num_sectors;
if (asprintf(&num_sectors, "%lld", atoll(fs_size) / 512) <= 0) {
printf("format_volume: failed to create %s command for %s\n", fs_type, location);
result = strdup("");
goto done;
}
const char *f2fs_path = "/sbin/mkfs.f2fs";
const char* const f2fs_argv[] = {"mkfs.f2fs", "-t", "-d1", location, num_sectors, NULL};
int status = exec_cmd(f2fs_path, (char* const*)f2fs_argv);
free(num_sectors);
if (status != 0) {
printf("%s: mkfs.f2fs failed (%d) on %s",
name, status, location);
result = strdup("");
goto done;
}
result = location;
#endif
} else {
printf("%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* RenameFn(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* src_name;
char* dst_name;
if (ReadArgs(state, argv, 2, &src_name, &dst_name) < 0) {
return NULL;
}
if (strlen(src_name) == 0) {
ErrorAbort(state, "src_name argument to %s() can't be empty", name);
goto done;
}
if (strlen(dst_name) == 0) {
ErrorAbort(state, "dst_name argument to %s() can't be empty", name);
goto done;
}
if (make_parents(dst_name) != 0) {
ErrorAbort(state, "Creating parent of %s failed, error %s",
dst_name, strerror(errno));
} else if (access(dst_name, F_OK) == 0 && access(src_name, F_OK) != 0) {
// File was already moved
result = dst_name;
} else if (rename(src_name, dst_name) != 0) {
ErrorAbort(state, "Rename of %s to %s failed, error %s",
src_name, dst_name, strerror(errno));
} else {
result = dst_name;
}
done:
free(src_name);
if (result != dst_name) free(dst_name);
return StringValue(result);
}
Value* DeleteFn(const char* name, State* state, int argc, Expr* argv[]) {
char** paths = reinterpret_cast<char**>(malloc(argc * sizeof(char*)));
for (int i = 0; i < argc; ++i) {
paths[i] = Evaluate(state, argv[i]);
if (paths[i] == NULL) {
for (int j = 0; j < i; ++j) {
free(paths[j]);
}
free(paths);
return NULL;
}
}
bool recursive = (strcmp(name, "delete_recursive") == 0);
int success = 0;
for (int 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;
android::base::ParseInt(sec_str, &sec);
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,
&timestamp,
NULL, NULL, sehandle);
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.
ZipArchive* za = ((UpdaterInfo*)(state->cookie))->package_zip;
char* zip_path;
char* dest_path;
if (ReadArgs(state, argv, 2, &zip_path, &dest_path) < 0) return NULL;
const ZipEntry* entry = mzFindZipEntry(za, zip_path);
if (entry == NULL) {
printf("%s: no %s in package\n", name, zip_path);
goto done2;
}
{
int fd = TEMP_FAILURE_RETRY(ota_open(dest_path, O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR));
if (fd == -1) {
printf("%s: can't open %s for write: %s\n", name, dest_path, strerror(errno));
goto done2;
}
success = mzExtractZipEntryToFile(za, entry, fd);
if (ota_fsync(fd) == -1) {
printf("fsync of \"%s\" failed: %s\n", dest_path, strerror(errno));
success = false;
}
if (ota_close(fd) == -1) {
printf("close of \"%s\" failed: %s\n", dest_path, strerror(errno));
success = false;
}
}
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;
if (ReadArgs(state, argv, 1, &zip_path) < 0) return NULL;
Value* v = reinterpret_cast<Value*>(malloc(sizeof(Value)));
v->type = VAL_BLOB;
v->size = -1;
v->data = NULL;
ZipArchive* za = ((UpdaterInfo*)(state->cookie))->package_zip;
const ZipEntry* entry = mzFindZipEntry(za, zip_path);
if (entry == NULL) {
printf("%s: no %s in package\n", name, zip_path);
goto done1;
}
v->size = mzGetZipEntryUncompLen(entry);
v->data = reinterpret_cast<char*>(malloc(v->size));
if (v->data == NULL) {
printf("%s: failed to allocate %zd bytes for %s\n",
name, 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;
}
}
// Create all parent directories of name, if necessary.
static int make_parents(char* name) {
char* p;
for (p = name + (strlen(name)-1); p > name; --p) {
if (*p != '/') continue;
*p = '\0';
if (make_parents(name) < 0) return -1;
int result = mkdir(name, 0700);
if (result == 0) printf("created [%s]\n", name);
*p = '/';
if (result == 0 || errno == EEXIST) {
// successfully created or already existed; we're done
return 0;
} else {
printf("failed to mkdir %s: %s\n", name, strerror(errno));
return -1;
}
}
return 0;
}
// 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 bad = 0;
int i;
for (i = 0; i < argc-1; ++i) {
if (unlink(srcs[i]) < 0) {
if (errno != ENOENT) {
printf("%s: failed to remove %s: %s\n",
name, srcs[i], strerror(errno));
++bad;
}
}
if (make_parents(srcs[i])) {
printf("%s: failed to symlink %s to %s: making parents failed\n",
name, srcs[i], target);
++bad;
}
if (symlink(target, srcs[i]) < 0) {
printf("%s: failed to symlink %s to %s: %s\n",
name, srcs[i], target, strerror(errno));
++bad;
}
free(srcs[i]);
}
free(srcs);
if (bad) {
return ErrorAbort(state, "%s: some symlinks failed", name);
}
return StringValue(strdup(""));
}
struct perm_parsed_args {
bool has_uid;
uid_t uid;
bool has_gid;
gid_t gid;
bool has_mode;
mode_t mode;
bool has_fmode;
mode_t fmode;
bool has_dmode;
mode_t dmode;
bool has_selabel;
char* selabel;
bool has_capabilities;
uint64_t capabilities;
};
static struct perm_parsed_args ParsePermArgs(State * state, int argc, char** args) {
int i;
struct perm_parsed_args parsed;
int bad = 0;
static int max_warnings = 20;
memset(&parsed, 0, sizeof(parsed));
for (i = 1; i < argc; i += 2) {
if (strcmp("uid", args[i]) == 0) {
int64_t uid;
if (sscanf(args[i+1], "%" SCNd64, &uid) == 1) {
parsed.uid = uid;
parsed.has_uid = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid UID \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (strcmp("gid", args[i]) == 0) {
int64_t gid;
if (sscanf(args[i+1], "%" SCNd64, &gid) == 1) {
parsed.gid = gid;
parsed.has_gid = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid GID \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (strcmp("mode", args[i]) == 0) {
int32_t mode;
if (sscanf(args[i+1], "%" SCNi32, &mode) == 1) {
parsed.mode = mode;
parsed.has_mode = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid mode \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (strcmp("dmode", args[i]) == 0) {
int32_t mode;
if (sscanf(args[i+1], "%" SCNi32, &mode) == 1) {
parsed.dmode = mode;
parsed.has_dmode = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid dmode \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (strcmp("fmode", args[i]) == 0) {
int32_t mode;
if (sscanf(args[i+1], "%" SCNi32, &mode) == 1) {
parsed.fmode = mode;
parsed.has_fmode = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid fmode \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (strcmp("capabilities", args[i]) == 0) {
int64_t capabilities;
if (sscanf(args[i+1], "%" SCNi64, &capabilities) == 1) {
parsed.capabilities = capabilities;
parsed.has_capabilities = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid capabilities \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (strcmp("selabel", args[i]) == 0) {
if (args[i+1][0] != '\0') {
parsed.selabel = args[i+1];
parsed.has_selabel = true;
} else {
uiPrintf(state, "ParsePermArgs: invalid selabel \"%s\"\n", args[i + 1]);
bad++;
}
continue;
}
if (max_warnings != 0) {
printf("ParsedPermArgs: unknown key \"%s\", ignoring\n", args[i]);
max_warnings--;
if (max_warnings == 0) {
printf("ParsedPermArgs: suppressing further warnings\n");
}
}
}
return parsed;
}
static int ApplyParsedPerms(
State * state,
const char* filename,
const struct stat *statptr,
struct perm_parsed_args parsed)
{
int bad = 0;
if (parsed.has_selabel) {
if (lsetfilecon(filename, parsed.selabel) != 0) {
uiPrintf(state, "ApplyParsedPerms: lsetfilecon of %s to %s failed: %s\n",
filename, parsed.selabel, strerror(errno));
bad++;
}
}
/* ignore symlinks */
if (S_ISLNK(statptr->st_mode)) {
return bad;
}
if (parsed.has_uid) {
if (chown(filename, parsed.uid, -1) < 0) {
uiPrintf(state, "ApplyParsedPerms: chown of %s to %d failed: %s\n",
filename, parsed.uid, strerror(errno));
bad++;
}
}
if (parsed.has_gid) {
if (chown(filename, -1, parsed.gid) < 0) {
uiPrintf(state, "ApplyParsedPerms: chgrp of %s to %d failed: %s\n",
filename, parsed.gid, strerror(errno));
bad++;
}
}
if (parsed.has_mode) {
if (chmod(filename, parsed.mode) < 0) {
uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n",
filename, parsed.mode, strerror(errno));
bad++;
}
}
if (parsed.has_dmode && S_ISDIR(statptr->st_mode)) {
if (chmod(filename, parsed.dmode) < 0) {
uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n",
filename, parsed.dmode, strerror(errno));
bad++;
}
}
if (parsed.has_fmode && S_ISREG(statptr->st_mode)) {
if (chmod(filename, parsed.fmode) < 0) {
uiPrintf(state, "ApplyParsedPerms: chmod of %s to %d failed: %s\n",
filename, parsed.fmode, strerror(errno));
bad++;
}
}
if (parsed.has_capabilities && S_ISREG(statptr->st_mode)) {
if (parsed.capabilities == 0) {
if ((removexattr(filename, XATTR_NAME_CAPS) == -1) && (errno != ENODATA)) {
// Report failure unless it's ENODATA (attribute not set)
uiPrintf(state, "ApplyParsedPerms: removexattr of %s to %" PRIx64 " failed: %s\n",
filename, parsed.capabilities, strerror(errno));
bad++;
}
} else {
struct vfs_cap_data cap_data;
memset(&cap_data, 0, sizeof(cap_data));
cap_data.magic_etc = VFS_CAP_REVISION | VFS_CAP_FLAGS_EFFECTIVE;
cap_data.data[0].permitted = (uint32_t) (parsed.capabilities & 0xffffffff);
cap_data.data[0].inheritable = 0;
cap_data.data[1].permitted = (uint32_t) (parsed.capabilities >> 32);
cap_data.data[1].inheritable = 0;
if (setxattr(filename, XATTR_NAME_CAPS, &cap_data, sizeof(cap_data), 0) < 0) {
uiPrintf(state, "ApplyParsedPerms: setcap of %s to %" PRIx64 " failed: %s\n",
filename, parsed.capabilities, strerror(errno));
bad++;
}
}
}
return bad;
}
// nftw doesn't allow us to pass along context, so we need to use
// global variables. *sigh*
static struct perm_parsed_args recursive_parsed_args;
static State* recursive_state;
static int do_SetMetadataRecursive(const char* filename, const struct stat *statptr,
int fileflags, struct FTW *pfwt) {
return ApplyParsedPerms(recursive_state, filename, statptr, recursive_parsed_args);
}
static Value* SetMetadataFn(const char* name, State* state, int argc, Expr* argv[]) {
int bad = 0;
struct stat sb;
Value* result = NULL;
bool recursive = (strcmp(name, "set_metadata_recursive") == 0);
if ((argc % 2) != 1) {
return ErrorAbort(state, "%s() expects an odd number of arguments, got %d", name, argc);
}
char** args = ReadVarArgs(state, argc, argv);
if (args == NULL) return NULL;
if (lstat(args[0], &sb) == -1) {
result = ErrorAbort(state, "%s: Error on lstat of \"%s\": %s", name, args[0], strerror(errno));
goto done;
}
{
struct perm_parsed_args parsed = ParsePermArgs(state, argc, args);
if (recursive) {
recursive_parsed_args = parsed;
recursive_state = state;
bad += nftw(args[0], do_SetMetadataRecursive, 30, FTW_CHDIR | FTW_DEPTH | FTW_PHYS);
memset(&recursive_parsed_args, 0, sizeof(recursive_parsed_args));
recursive_state = NULL;
} else {
bad += ApplyParsedPerms(state, args[0], &sb, parsed);
}
}
done:
for (int i = 0; i < argc; ++i) {
free(args[i]);
}
free(args);
if (result != NULL) {
return result;
}
if (bad > 0) {
return ErrorAbort(state, "%s: some changes failed", name);
}
return StringValue(strdup(""));
}
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 = 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,blank lines, lines without '=' ignored),
// 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 = reinterpret_cast<char*>(malloc(st.st_size+1));
if (buffer == NULL) {
ErrorAbort(state, "%s: failed to alloc %zu bytes", name,
static_cast<size_t>(st.st_size+1));
goto done;
}
FILE* f;
f = ota_fopen(filename, "rb");
if (f == NULL) {
ErrorAbort(state, "%s: failed to open %s: %s", name, filename, strerror(errno));
goto done;
}
if (ota_fread(buffer, 1, st.st_size, f) != static_cast<size_t>(st.st_size)) {
ErrorAbort(state, "%s: failed to read %zu bytes from %s",
name, static_cast<size_t>(st.st_size), filename);
ota_fclose(f);
goto done;
}
buffer[st.st_size] = '\0';
ota_fclose(f);
char* line;
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) {
continue;
}
// 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);
}
// 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;
}
char* partition = NULL;
if (partition_value->type != VAL_STRING) {
ErrorAbort(state, "partition argument to %s must be string", name);
goto done;
}
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;
}
mtd_scan_partitions();
const MtdPartition* mtd;
mtd = mtd_find_partition_by_name(partition);
if (mtd == NULL) {
printf("%s: no mtd partition named \"%s\"\n", name, partition);
result = strdup("");
goto done;
}
MtdWriteContext* ctx;
ctx = mtd_write_partition(mtd);
if (ctx == NULL) {
printf("%s: can't write mtd partition \"%s\"\n",
name, partition);
result = strdup("");
goto done;
}
bool success;
if (contents->type == VAL_STRING) {
// we're given a filename as the contents
char* filename = contents->data;
FILE* f = ota_fopen(filename, "rb");
if (f == NULL) {
printf("%s: can't open %s: %s\n", name, filename, strerror(errno));
result = strdup("");
goto done;
}
success = true;
char* buffer = reinterpret_cast<char*>(malloc(BUFSIZ));
int read;
while (success && (read = ota_fread(buffer, 1, BUFSIZ, f)) > 0) {
int wrote = mtd_write_data(ctx, buffer, read);
success = success && (wrote == read);
}
free(buffer);
ota_fclose(f);
} else {
// we're given a blob as the contents
ssize_t wrote = mtd_write_data(ctx, contents->data, contents->size);
success = (wrote == contents->size);
}
if (!success) {
printf("mtd_write_data to %s failed: %s\n",
partition, strerror(errno));
}
if (mtd_erase_blocks(ctx, -1) == -1) {
printf("%s: error erasing blocks of %s\n", name, partition);
}
if (mtd_write_close(ctx) != 0) {
printf("%s: error closing write of %s\n", name, partition);
}
printf("%s %s partition\n",
success ? "wrote" : "failed to write", partition);
result = success ? partition : strdup("");
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;
}
size_t bytes;
if (!android::base::ParseUint(bytes_str, &bytes)) {
ErrorAbort(state, "%s(): can't parse \"%s\" as byte count\n\n", name, bytes_str);
free(bytes_str);
return nullptr;
}
return StringValue(strdup(CacheSizeCheck(bytes) ? "" : "t"));
}
// apply_patch(file, size, init_sha1, tgt_sha1, patch)
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;
}
size_t target_size;
if (!android::base::ParseUint(target_size_str, &target_size)) {
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 nullptr;
}
int patchcount = (argc-4) / 2;
std::unique_ptr<Value*, decltype(&free)> arg_values(ReadValueVarArgs(state, argc-4, argv+4),
free);
if (!arg_values) {
return nullptr;
}
std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> patch_shas;
std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> patches;
// Protect values by unique_ptrs first to get rid of memory leak.
for (int i = 0; i < patchcount * 2; i += 2) {
patch_shas.emplace_back(arg_values.get()[i], FreeValue);
patches.emplace_back(arg_values.get()[i+1], FreeValue);
}
for (int i = 0; i < patchcount; ++i) {
if (patch_shas[i]->type != VAL_STRING) {
ErrorAbort(state, "%s(): sha-1 #%d is not string", name, i);
return nullptr;
}
if (patches[i]->type != VAL_BLOB) {
ErrorAbort(state, "%s(): patch #%d is not blob", name, i);
return nullptr;
}
}
std::vector<char*> patch_sha_str;
std::vector<Value*> patch_ptrs;
for (int i = 0; i < patchcount; ++i) {
patch_sha_str.push_back(patch_shas[i]->data);
patch_ptrs.push_back(patches[i].get());
}
int result = applypatch(source_filename, target_filename,
target_sha1, target_size,
patchcount, patch_sha_str.data(), patch_ptrs.data(), NULL);
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" : ""));
}
// This is the updater side handler for ui_print() in edify script. Contents
// will be sent over to the recovery side for on-screen display.
Value* UIPrintFn(const char* name, State* state, int argc, Expr* argv[]) {
char** args = ReadVarArgs(state, argc, argv);
if (args == NULL) {
return NULL;
}
std::string buffer;
for (int i = 0; i < argc; ++i) {
buffer += args[i];
free(args[i]);
}
free(args);
buffer += "\n";
uiPrint(state, buffer);
return StringValue(strdup(buffer.c_str()));
}
Value* WipeCacheFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 0) {
return ErrorAbort(state, "%s() expects no args, got %d", name, argc);
}
fprintf(((UpdaterInfo*)(state->cookie))->cmd_pipe, "wipe_cache\n");
return StringValue(strdup("t"));
}
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 = reinterpret_cast<char**>(malloc(sizeof(char*) * (argc+1)));
memcpy(args2, args, sizeof(char*) * argc);
args2[argc] = NULL;
printf("about to run program [%s] with %d args\n", args2[0], argc);
pid_t child = fork();
if (child == 0) {
execv(args2[0], args2);
printf("run_program: execv failed: %s\n", strerror(errno));
_exit(1);
}
int status;
waitpid(child, &status, 0);
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) != 0) {
printf("run_program: child exited with status %d\n",
WEXITSTATUS(status));
}
} else if (WIFSIGNALED(status)) {
printf("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));
}
// 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);
}
std::unique_ptr<Value*, decltype(&free)> arg_values(ReadValueVarArgs(state, argc, argv), free);
if (arg_values == nullptr) {
return nullptr;
}
std::vector<std::unique_ptr<Value, decltype(&FreeValue)>> args;
for (int i = 0; i < argc; ++i) {
args.emplace_back(arg_values.get()[i], FreeValue);
}
if (args[0]->size < 0) {
return StringValue(strdup(""));
}
uint8_t digest[SHA_DIGEST_LENGTH];
SHA1(reinterpret_cast<uint8_t*>(args[0]->data), args[0]->size, digest);
if (argc == 1) {
return StringValue(PrintSha1(digest));
}
int i;
uint8_t arg_digest[SHA_DIGEST_LENGTH];
for (i = 1; i < argc; ++i) {
if (args[i]->type != VAL_STRING) {
printf("%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.
printf("%s(): error parsing \"%s\" as sha-1; skipping",
name, args[i]->data);
} else if (memcmp(digest, arg_digest, SHA_DIGEST_LENGTH) == 0) {
break;
}
}
if (i >= argc) {
// Didn't match any of the hex strings; return false.
return StringValue(strdup(""));
}
// Found a match.
return args[i].release();
}
// 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 = static_cast<Value*>(malloc(sizeof(Value)));
if (v == nullptr) {
return nullptr;
}
v->type = VAL_BLOB;
v->size = -1;
v->data = nullptr;
FileContents fc;
if (LoadFileContents(filename, &fc) != 0) {
v->data = static_cast<char*>(malloc(fc.data.size()));
if (v->data != nullptr) {
memcpy(v->data, fc.data.data(), fc.data.size());
v->size = fc.data.size();
}
}
free(filename);
return v;
}
// Immediately reboot the device. Recovery is not finished normally,
// so if you reboot into recovery it will re-start applying the
// current package (because nothing has cleared the copy of the
// arguments stored in the BCB).
//
// The argument is the partition name passed to the android reboot
// property. It can be "recovery" to boot from the recovery
// partition, or "" (empty string) to boot from the regular boot
// partition.
Value* RebootNowFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* filename;
char* property;
if (ReadArgs(state, argv, 2, &filename, &property) < 0) return NULL;
char buffer[80];
// zero out the 'command' field of the bootloader message.
memset(buffer, 0, sizeof(((struct bootloader_message*)0)->command));
FILE* f = ota_fopen(filename, "r+b");
fseek(f, offsetof(struct bootloader_message, command), SEEK_SET);
ota_fwrite(buffer, sizeof(((struct bootloader_message*)0)->command), 1, f);
ota_fclose(f);
free(filename);
strcpy(buffer, "reboot,");
if (property != NULL) {
strncat(buffer, property, sizeof(buffer)-10);
}
property_set(ANDROID_RB_PROPERTY, buffer);
sleep(5);
free(property);
ErrorAbort(state, "%s() failed to reboot", name);
return NULL;
}
// Store a string value somewhere that future invocations of recovery
// can access it. This value is called the "stage" and can be used to
// drive packages that need to do reboots in the middle of
// installation and keep track of where they are in the multi-stage
// install.
//
// The first argument is the block device for the misc partition
// ("/misc" in the fstab), which is where this value is stored. The
// second argument is the string to store; it should not exceed 31
// bytes.
Value* SetStageFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* filename;
char* stagestr;
if (ReadArgs(state, argv, 2, &filename, &stagestr) < 0) return NULL;
// Store this value in the misc partition, immediately after the
// bootloader message that the main recovery uses to save its
// arguments in case of the device restarting midway through
// package installation.
FILE* f = ota_fopen(filename, "r+b");
fseek(f, offsetof(struct bootloader_message, stage), SEEK_SET);
int to_write = strlen(stagestr)+1;
int max_size = sizeof(((struct bootloader_message*)0)->stage);
if (to_write > max_size) {
to_write = max_size;
stagestr[max_size-1] = 0;
}
ota_fwrite(stagestr, to_write, 1, f);
ota_fclose(f);
free(stagestr);
return StringValue(filename);
}
// Return the value most recently saved with SetStageFn. The argument
// is the block device for the misc partition.
Value* GetStageFn(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;
char buffer[sizeof(((struct bootloader_message*)0)->stage)];
FILE* f = ota_fopen(filename, "rb");
fseek(f, offsetof(struct bootloader_message, stage), SEEK_SET);
ota_fread(buffer, sizeof(buffer), 1, f);
ota_fclose(f);
buffer[sizeof(buffer)-1] = '\0';
return StringValue(strdup(buffer));
}
Value* WipeBlockDeviceFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 2) {
return ErrorAbort(state, "%s() expects 2 args, got %d", name, argc);
}
char* filename;
char* len_str;
if (ReadArgs(state, argv, 2, &filename, &len_str) < 0) return NULL;
size_t len;
android::base::ParseUint(len_str, &len);
int fd = ota_open(filename, O_WRONLY, 0644);
int success = wipe_block_device(fd, len);
free(filename);
free(len_str);
ota_close(fd);
return StringValue(strdup(success ? "t" : ""));
}
Value* EnableRebootFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc != 0) {
return ErrorAbort(state, "%s() expects no args, got %d", name, argc);
}
UpdaterInfo* ui = (UpdaterInfo*)(state->cookie);
fprintf(ui->cmd_pipe, "enable_reboot\n");
return StringValue(strdup("t"));
}
Value* Tune2FsFn(const char* name, State* state, int argc, Expr* argv[]) {
if (argc == 0) {
return ErrorAbort(state, "%s() expects args, got %d", name, argc);
}
char** args = ReadVarArgs(state, argc, argv);
if (args == NULL) {
return ErrorAbort(state, "%s() could not read args", name);
}
char** args2 = reinterpret_cast<char**>(malloc(sizeof(char*) * (argc+1)));
// Tune2fs expects the program name as its args[0]
args2[0] = strdup(name);
for (int i = 0; i < argc; ++i) {
args2[i + 1] = args[i];
}
int result = tune2fs_main(argc + 1, args2);
for (int i = 0; i < argc; ++i) {
free(args[i]);
}
free(args);
free(args2[0]);
free(args2);
if (result != 0) {
return ErrorAbort(state, "%s() returned error code %d", name, result);
}
return StringValue(strdup("t"));
}
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("symlink", SymlinkFn);
// Usage:
// set_metadata("filename", "key1", "value1", "key2", "value2", ...)
// Example:
// set_metadata("/system/bin/netcfg", "uid", 0, "gid", 3003, "mode", 02750, "selabel", "u:object_r:system_file:s0", "capabilities", 0x0);
RegisterFunction("set_metadata", SetMetadataFn);
// Usage:
// set_metadata_recursive("dirname", "key1", "value1", "key2", "value2", ...)
// Example:
// set_metadata_recursive("/system", "uid", 0, "gid", 0, "fmode", 0644, "dmode", 0755, "selabel", "u:object_r:system_file:s0", "capabilities", 0x0);
RegisterFunction("set_metadata_recursive", SetMetadataFn);
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("wipe_block_device", WipeBlockDeviceFn);
RegisterFunction("read_file", ReadFileFn);
RegisterFunction("sha1_check", Sha1CheckFn);
RegisterFunction("rename", RenameFn);
RegisterFunction("wipe_cache", WipeCacheFn);
RegisterFunction("ui_print", UIPrintFn);
RegisterFunction("run_program", RunProgramFn);
RegisterFunction("reboot_now", RebootNowFn);
RegisterFunction("get_stage", GetStageFn);
RegisterFunction("set_stage", SetStageFn);
RegisterFunction("enable_reboot", EnableRebootFn);
RegisterFunction("tune2fs", Tune2FsFn);
}
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