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replicant-frameworks_native/cmds/installd/commands.c
Dave Allison d93707342a ART profiler 
Add args to the installd commands for profiler usage.
Make installd create the profile files and allow apps
to write to them.

The profile files are in /data/dalvik-cache/profiles.  This
central location is needed due to permissions issues with
dex2oat reading from an app's data directory.  The solution
is to put the profile file in a directory owned by the
install user and make the file writeable by the shared group
id of for the app.  The app can read and write to these files
only in the profiles directory.  The 'system' user also needs
to be able to read the files in order to determine the amount
of change to the file over time.

Bug: 12877748
Change-Id: I9b8e59e3bd7df8a1bf60fa7ffd376a24ba0eb42f

Conflicts:
	cmds/installd/commands.c
2014-03-07 12:35:52 -08:00

1236 lines
39 KiB
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/*
** Copyright 2008, 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 <sys/capability.h>
#include "installd.h"
#include <diskusage/dirsize.h>
#include <selinux/android.h>
/* Directory records that are used in execution of commands. */
dir_rec_t android_data_dir;
dir_rec_t android_asec_dir;
dir_rec_t android_app_dir;
dir_rec_t android_app_private_dir;
dir_rec_t android_app_lib_dir;
dir_rec_t android_media_dir;
dir_rec_array_t android_system_dirs;
int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo)
{
char pkgdir[PKG_PATH_MAX];
char libsymlink[PKG_PATH_MAX];
char applibdir[PKG_PATH_MAX];
struct stat libStat;
if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
ALOGE("invalid uid/gid: %d %d\n", uid, gid);
return -1;
}
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
ALOGE("cannot create package path\n");
return -1;
}
if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) {
ALOGE("cannot create package lib symlink origin path\n");
return -1;
}
if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
ALOGE("cannot create package lib symlink dest path\n");
return -1;
}
if (mkdir(pkgdir, 0751) < 0) {
ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
return -1;
}
if (chmod(pkgdir, 0751) < 0) {
ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -1;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
return -1;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, 0) < 0) {
ALOGE("couldn't delete lib directory during install for: %s", libsymlink);
return -1;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib directory during install for: %s", libsymlink);
return -1;
}
}
}
if (symlink(applibdir, libsymlink) < 0) {
ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir,
strerror(errno));
unlink(pkgdir);
return -1;
}
if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) {
ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -errno;
}
if (chown(pkgdir, uid, gid) < 0) {
ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -1;
}
return 0;
}
int uninstall(const char *pkgname, userid_t userid)
{
char pkgdir[PKG_PATH_MAX];
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid))
return -1;
remove_profile_file(pkgname);
/* delete contents AND directory, no exceptions */
return delete_dir_contents(pkgdir, 1, NULL);
}
int renamepkg(const char *oldpkgname, const char *newpkgname)
{
char oldpkgdir[PKG_PATH_MAX];
char newpkgdir[PKG_PATH_MAX];
if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
return -1;
if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
return -1;
if (rename(oldpkgdir, newpkgdir) < 0) {
ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
return -errno;
}
return 0;
}
int fix_uid(const char *pkgname, uid_t uid, gid_t gid)
{
char pkgdir[PKG_PATH_MAX];
struct stat s;
int rc = 0;
if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
ALOGE("invalid uid/gid: %d %d\n", uid, gid);
return -1;
}
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
ALOGE("cannot create package path\n");
return -1;
}
if (stat(pkgdir, &s) < 0) return -1;
if (s.st_uid != 0 || s.st_gid != 0) {
ALOGE("fixing uid of non-root pkg: %s %lu %lu\n", pkgdir, s.st_uid, s.st_gid);
return -1;
}
if (chmod(pkgdir, 0751) < 0) {
ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (chown(pkgdir, uid, gid) < 0) {
ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
return 0;
}
int delete_user_data(const char *pkgname, userid_t userid)
{
char pkgdir[PKG_PATH_MAX];
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid))
return -1;
/* delete contents, excluding "lib", but not the directory itself */
return delete_dir_contents(pkgdir, 0, "lib");
}
int make_user_data(const char *pkgname, uid_t uid, userid_t userid, const char* seinfo)
{
char pkgdir[PKG_PATH_MAX];
char applibdir[PKG_PATH_MAX];
char libsymlink[PKG_PATH_MAX];
struct stat libStat;
// Create the data dir for the package
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) {
return -1;
}
if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userid)) {
ALOGE("cannot create package lib symlink origin path\n");
return -1;
}
if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
ALOGE("cannot create package lib symlink dest path\n");
return -1;
}
if (mkdir(pkgdir, 0751) < 0) {
ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
return -errno;
}
if (chmod(pkgdir, 0751) < 0) {
ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno));
unlink(pkgdir);
return -1;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, 0) < 0) {
ALOGE("couldn't delete lib directory during install for non-primary: %s",
libsymlink);
unlink(pkgdir);
return -1;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib directory during install for non-primary: %s",
libsymlink);
unlink(pkgdir);
return -1;
}
}
}
if (symlink(applibdir, libsymlink) < 0) {
ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink,
applibdir, strerror(errno));
unlink(pkgdir);
return -1;
}
if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) {
ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -errno;
}
if (chown(pkgdir, uid, uid) < 0) {
ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(libsymlink);
unlink(pkgdir);
return -errno;
}
return 0;
}
int delete_user(userid_t userid)
{
char data_path[PKG_PATH_MAX];
if (create_user_path(data_path, userid)) {
return -1;
}
if (delete_dir_contents(data_path, 1, NULL)) {
return -1;
}
char media_path[PATH_MAX];
if (create_user_media_path(media_path, userid) == -1) {
return -1;
}
if (delete_dir_contents(media_path, 1, NULL) == -1) {
return -1;
}
return 0;
}
int delete_cache(const char *pkgname, userid_t userid)
{
char cachedir[PKG_PATH_MAX];
if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, userid))
return -1;
/* delete contents, not the directory, no exceptions */
return delete_dir_contents(cachedir, 0, 0);
}
/* Try to ensure free_size bytes of storage are available.
* Returns 0 on success.
* This is rather simple-minded because doing a full LRU would
* be potentially memory-intensive, and without atime it would
* also require that apps constantly modify file metadata even
* when just reading from the cache, which is pretty awful.
*/
int free_cache(int64_t free_size)
{
cache_t* cache;
int64_t avail;
DIR *d;
struct dirent *de;
char tmpdir[PATH_MAX];
char *dirpos;
avail = data_disk_free();
if (avail < 0) return -1;
ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
if (avail >= free_size) return 0;
cache = start_cache_collection();
// Collect cache files for primary user.
if (create_user_path(tmpdir, 0) == 0) {
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
}
// Search for other users and add any cache files from them.
snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path,
SECONDARY_USER_PREFIX);
dirpos = tmpdir + strlen(tmpdir);
d = opendir(tmpdir);
if (d != NULL) {
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
strcpy(dirpos, name);
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
} else {
ALOGW("Path exceeds limit: %s%s", tmpdir, name);
}
}
}
closedir(d);
}
// Collect cache files on external storage for all users (if it is mounted as part
// of the internal storage).
strcpy(tmpdir, android_media_dir.path);
dirpos = tmpdir + strlen(tmpdir);
d = opendir(tmpdir);
if (d != NULL) {
while ((de = readdir(d))) {
if (de->d_type == DT_DIR) {
const char *name = de->d_name;
/* skip any dir that doesn't start with a number, so not a user */
if (name[0] < '0' || name[0] > '9') {
continue;
}
if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
strcpy(dirpos, name);
if (lookup_media_dir(tmpdir, "Android") == 0
&& lookup_media_dir(tmpdir, "data") == 0) {
//ALOGI("adding cache files from %s\n", tmpdir);
add_cache_files(cache, tmpdir, "cache");
}
} else {
ALOGW("Path exceeds limit: %s%s", tmpdir, name);
}
}
}
closedir(d);
}
clear_cache_files(cache, free_size);
finish_cache_collection(cache);
return data_disk_free() >= free_size ? 0 : -1;
}
int move_dex(const char *src, const char *dst)
{
char src_dex[PKG_PATH_MAX];
char dst_dex[PKG_PATH_MAX];
if (validate_apk_path(src)) return -1;
if (validate_apk_path(dst)) return -1;
if (create_cache_path(src_dex, src)) return -1;
if (create_cache_path(dst_dex, dst)) return -1;
ALOGV("move %s -> %s\n", src_dex, dst_dex);
if (rename(src_dex, dst_dex) < 0) {
ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
return -1;
} else {
return 0;
}
}
int rm_dex(const char *path)
{
char dex_path[PKG_PATH_MAX];
if (validate_apk_path(path)) return -1;
if (create_cache_path(dex_path, path)) return -1;
ALOGV("unlink %s\n", dex_path);
if (unlink(dex_path) < 0) {
ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
return -1;
} else {
return 0;
}
}
int get_size(const char *pkgname, userid_t userid, const char *apkpath,
const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath,
int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize,
int64_t* _asecsize)
{
DIR *d;
int dfd;
struct dirent *de;
struct stat s;
char path[PKG_PATH_MAX];
int64_t codesize = 0;
int64_t datasize = 0;
int64_t cachesize = 0;
int64_t asecsize = 0;
/* count the source apk as code -- but only if it's not
* on the /system partition and its not on the sdcard.
*/
if (validate_system_app_path(apkpath) &&
strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
if (stat(apkpath, &s) == 0) {
codesize += stat_size(&s);
}
}
/* count the forward locked apk as code if it is given
*/
if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
if (stat(fwdlock_apkpath, &s) == 0) {
codesize += stat_size(&s);
}
}
/* count the cached dexfile as code */
if (!create_cache_path(path, apkpath)) {
if (stat(path, &s) == 0) {
codesize += stat_size(&s);
}
}
/* add in size of any libraries */
if (libdirpath != NULL && libdirpath[0] != '!') {
d = opendir(libdirpath);
if (d != NULL) {
dfd = dirfd(d);
codesize += calculate_dir_size(dfd);
closedir(d);
}
}
/* compute asec size if it is given
*/
if (asecpath != NULL && asecpath[0] != '!') {
if (stat(asecpath, &s) == 0) {
asecsize += stat_size(&s);
}
}
if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, userid)) {
goto done;
}
d = opendir(path);
if (d == NULL) {
goto done;
}
dfd = dirfd(d);
/* most stuff in the pkgdir is data, except for the "cache"
* directory and below, which is cache, and the "lib" directory
* and below, which is code...
*/
while ((de = readdir(d))) {
const char *name = de->d_name;
if (de->d_type == DT_DIR) {
int subfd;
int64_t statsize = 0;
int64_t dirsize = 0;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
statsize = stat_size(&s);
}
subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
if (subfd >= 0) {
dirsize = calculate_dir_size(subfd);
}
if(!strcmp(name,"lib")) {
codesize += dirsize + statsize;
} else if(!strcmp(name,"cache")) {
cachesize += dirsize + statsize;
} else {
datasize += dirsize + statsize;
}
} else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
// This is the symbolic link to the application's library
// code. We'll count this as code instead of data, since
// it is not something that the app creates.
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
codesize += stat_size(&s);
}
} else {
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
datasize += stat_size(&s);
}
}
}
closedir(d);
done:
*_codesize = codesize;
*_datasize = datasize;
*_cachesize = cachesize;
*_asecsize = asecsize;
return 0;
}
int create_cache_path(char path[PKG_PATH_MAX], const char *src)
{
char *tmp;
int srclen;
int dstlen;
srclen = strlen(src);
/* demand that we are an absolute path */
if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
return -1;
}
if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX?
return -1;
}
dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
strlen(DALVIK_CACHE_POSTFIX) + 1;
if (dstlen > PKG_PATH_MAX) {
return -1;
}
sprintf(path,"%s%s%s",
DALVIK_CACHE_PREFIX,
src + 1, /* skip the leading / */
DALVIK_CACHE_POSTFIX);
for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) {
if (*tmp == '/') {
*tmp = '@';
}
}
return 0;
}
static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name,
const char* output_file_name)
{
/* platform-specific flags affecting optimization and verification */
char dexopt_flags[PROPERTY_VALUE_MAX];
property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
ALOGV("dalvik.vm.dexopt-flags=%s\n", dexopt_flags);
static const char* DEX_OPT_BIN = "/system/bin/dexopt";
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
char zip_num[MAX_INT_LEN];
char odex_num[MAX_INT_LEN];
sprintf(zip_num, "%d", zip_fd);
sprintf(odex_num, "%d", odex_fd);
ALOGV("Running %s in=%s out=%s\n", DEX_OPT_BIN, input_file_name, output_file_name);
execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
dexopt_flags, (char*) NULL);
ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
}
static void run_dex2oat(int zip_fd, int oat_fd, const char* input_file_name,
const char* output_file_name, const char *pkgname)
{
char dex2oat_flags[PROPERTY_VALUE_MAX];
property_get("dalvik.vm.dex2oat-flags", dex2oat_flags, "");
ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags);
static const char* DEX2OAT_BIN = "/system/bin/dex2oat";
static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
char oat_location_arg[strlen("--oat-name=") + PKG_PATH_MAX];
char profile_file[strlen("--profile-file=") + PKG_PATH_MAX];
sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
if (strcmp(pkgname, "*") != 0) {
snprintf(profile_file, sizeof(profile_file), "--profile-file=%s/%s",
DALVIK_CACHE_PREFIX "profiles", pkgname);
} else {
strcpy(profile_file, "--no-profile-file");
}
ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
execl(DEX2OAT_BIN, DEX2OAT_BIN,
zip_fd_arg, zip_location_arg,
oat_fd_arg, oat_location_arg,
strlen(dex2oat_flags) > 0 ? dex2oat_flags : NULL,
profile_file,
(char*) NULL);
ALOGE("execl(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno));
}
static int wait_child(pid_t pid)
{
int status;
pid_t got_pid;
while (1) {
got_pid = waitpid(pid, &status, 0);
if (got_pid == -1 && errno == EINTR) {
printf("waitpid interrupted, retrying\n");
} else {
break;
}
}
if (got_pid != pid) {
ALOGW("waitpid failed: wanted %d, got %d: %s\n",
(int) pid, (int) got_pid, strerror(errno));
return 1;
}
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
return 0;
} else {
return status; /* always nonzero */
}
}
int dexopt(const char *apk_path, uid_t uid, int is_public,
const char *pkgname)
{
struct utimbuf ut;
struct stat apk_stat, dex_stat;
char out_path[PKG_PATH_MAX];
char persist_sys_dalvik_vm_lib[PROPERTY_VALUE_MAX];
char *end;
int res, zip_fd=-1, out_fd=-1;
if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
return -1;
}
/* The command to run depend on the value of persist.sys.dalvik.vm.lib */
property_get("persist.sys.dalvik.vm.lib.1", persist_sys_dalvik_vm_lib, "libdvm.so");
/* Before anything else: is there a .odex file? If so, we have
* precompiled the apk and there is nothing to do here.
*/
sprintf(out_path, "%s%s", apk_path, ".odex");
if (stat(out_path, &dex_stat) == 0) {
return 0;
}
if (create_cache_path(out_path, apk_path)) {
return -1;
}
memset(&apk_stat, 0, sizeof(apk_stat));
stat(apk_path, &apk_stat);
zip_fd = open(apk_path, O_RDONLY, 0);
if (zip_fd < 0) {
ALOGE("installd cannot open '%s' for input during dexopt\n", apk_path);
return -1;
}
unlink(out_path);
out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (out_fd < 0) {
ALOGE("installd cannot open '%s' for output during dexopt\n", out_path);
goto fail;
}
if (fchmod(out_fd,
S_IRUSR|S_IWUSR|S_IRGRP |
(is_public ? S_IROTH : 0)) < 0) {
ALOGE("installd cannot chmod '%s' during dexopt\n", out_path);
goto fail;
}
if (fchown(out_fd, AID_SYSTEM, uid) < 0) {
ALOGE("installd cannot chown '%s' during dexopt\n", out_path);
goto fail;
}
// Create profile file if there is a package name present.
if (strcmp(pkgname, "*") != 0) {
create_profile_file(pkgname, uid);
}
ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path);
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
ALOGE("setgid(%d) failed in installd during dexopt\n", uid);
exit(64);
}
if (setuid(uid) != 0) {
ALOGE("setuid(%d) failed in installd during dexopt\n", uid);
exit(65);
}
// drop capabilities
struct __user_cap_header_struct capheader;
struct __user_cap_data_struct capdata[2];
memset(&capheader, 0, sizeof(capheader));
memset(&capdata, 0, sizeof(capdata));
capheader.version = _LINUX_CAPABILITY_VERSION_3;
if (capset(&capheader, &capdata[0]) < 0) {
ALOGE("capset failed: %s\n", strerror(errno));
exit(66);
}
if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) {
ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno));
exit(67);
}
if (strncmp(persist_sys_dalvik_vm_lib, "libdvm", 6) == 0) {
run_dexopt(zip_fd, out_fd, apk_path, out_path);
} else if (strncmp(persist_sys_dalvik_vm_lib, "libart", 6) == 0) {
run_dex2oat(zip_fd, out_fd, apk_path, out_path, pkgname);
} else {
exit(69); /* Unexpected persist.sys.dalvik.vm.lib value */
}
exit(68); /* only get here on exec failure */
} else {
res = wait_child(pid);
if (res == 0) {
ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path);
} else {
ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", apk_path, res);
goto fail;
}
}
ut.actime = apk_stat.st_atime;
ut.modtime = apk_stat.st_mtime;
utime(out_path, &ut);
close(out_fd);
close(zip_fd);
return 0;
fail:
if (out_fd >= 0) {
close(out_fd);
unlink(out_path);
}
if (zip_fd >= 0) {
close(zip_fd);
}
return -1;
}
void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
struct stat* statbuf)
{
while (path[basepos] != 0) {
if (path[basepos] == '/') {
path[basepos] = 0;
if (lstat(path, statbuf) < 0) {
ALOGV("Making directory: %s\n", path);
if (mkdir(path, mode) == 0) {
chown(path, uid, gid);
} else {
ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
}
}
path[basepos] = '/';
basepos++;
}
basepos++;
}
}
int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
int dstuid, int dstgid, struct stat* statbuf)
{
DIR *d;
struct dirent *de;
int res;
int srcend = strlen(srcpath);
int dstend = strlen(dstpath);
if (lstat(srcpath, statbuf) < 0) {
ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
return 1;
}
if ((statbuf->st_mode&S_IFDIR) == 0) {
mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
dstuid, dstgid, statbuf);
ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
if (rename(srcpath, dstpath) >= 0) {
if (chown(dstpath, dstuid, dstgid) < 0) {
ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
unlink(dstpath);
return 1;
}
} else {
ALOGW("Unable to rename %s to %s: %s\n",
srcpath, dstpath, strerror(errno));
return 1;
}
return 0;
}
d = opendir(srcpath);
if (d == NULL) {
ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
return 1;
}
res = 0;
while ((de = readdir(d))) {
const char *name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
continue;
}
if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
continue;
}
srcpath[srcend] = dstpath[dstend] = '/';
strcpy(srcpath+srcend+1, name);
strcpy(dstpath+dstend+1, name);
if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
res = 1;
}
// Note: we will be leaving empty directories behind in srcpath,
// but that is okay, the package manager will be erasing all of the
// data associated with .apks that disappear.
srcpath[srcend] = dstpath[dstend] = 0;
}
closedir(d);
return res;
}
int movefiles()
{
DIR *d;
int dfd, subfd;
struct dirent *de;
struct stat s;
char buf[PKG_PATH_MAX+1];
int bufp, bufe, bufi, readlen;
char srcpkg[PKG_NAME_MAX];
char dstpkg[PKG_NAME_MAX];
char srcpath[PKG_PATH_MAX];
char dstpath[PKG_PATH_MAX];
int dstuid=-1, dstgid=-1;
int hasspace;
d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
if (d == NULL) {
goto done;
}
dfd = dirfd(d);
/* Iterate through all files in the directory, executing the
* file movements requested there-in.
*/
while ((de = readdir(d))) {
const char *name = de->d_name;
if (de->d_type == DT_DIR) {
continue;
} else {
subfd = openat(dfd, name, O_RDONLY);
if (subfd < 0) {
ALOGW("Unable to open update commands at %s%s\n",
UPDATE_COMMANDS_DIR_PREFIX, name);
continue;
}
bufp = 0;
bufe = 0;
buf[PKG_PATH_MAX] = 0;
srcpkg[0] = dstpkg[0] = 0;
while (1) {
bufi = bufp;
while (bufi < bufe && buf[bufi] != '\n') {
bufi++;
}
if (bufi < bufe) {
buf[bufi] = 0;
ALOGV("Processing line: %s\n", buf+bufp);
hasspace = 0;
while (bufp < bufi && isspace(buf[bufp])) {
hasspace = 1;
bufp++;
}
if (buf[bufp] == '#' || bufp == bufi) {
// skip comments and empty lines.
} else if (hasspace) {
if (dstpkg[0] == 0) {
ALOGW("Path before package line in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
} else if (srcpkg[0] == 0) {
// Skip -- source package no longer exists.
} else {
ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
!create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
movefileordir(srcpath, dstpath,
strlen(dstpath)-strlen(buf+bufp),
dstuid, dstgid, &s);
}
}
} else {
char* div = strchr(buf+bufp, ':');
if (div == NULL) {
ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
} else {
*div = 0;
div++;
if (strlen(buf+bufp) < PKG_NAME_MAX) {
strcpy(dstpkg, buf+bufp);
} else {
srcpkg[0] = dstpkg[0] = 0;
ALOGW("Package name too long in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
}
if (strlen(div) < PKG_NAME_MAX) {
strcpy(srcpkg, div);
} else {
srcpkg[0] = dstpkg[0] = 0;
ALOGW("Package name too long in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, div);
}
if (srcpkg[0] != 0) {
if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
if (lstat(srcpath, &s) < 0) {
// Package no longer exists -- skip.
srcpkg[0] = 0;
}
} else {
srcpkg[0] = 0;
ALOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
if (srcpkg[0] != 0) {
if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
if (lstat(dstpath, &s) == 0) {
dstuid = s.st_uid;
dstgid = s.st_gid;
} else {
// Destination package doesn't
// exist... due to original-package,
// this is normal, so don't be
// noisy about it.
srcpkg[0] = 0;
}
} else {
srcpkg[0] = 0;
ALOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
}
ALOGV("Transfering from %s to %s: uid=%d\n",
srcpkg, dstpkg, dstuid);
}
}
}
bufp = bufi+1;
} else {
if (bufp == 0) {
if (bufp < bufe) {
ALOGW("Line too long in %s%s, skipping: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, buf);
}
} else if (bufp < bufe) {
memcpy(buf, buf+bufp, bufe-bufp);
bufe -= bufp;
bufp = 0;
}
readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
if (readlen < 0) {
ALOGW("Failure reading update commands in %s%s: %s\n",
UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
break;
} else if (readlen == 0) {
break;
}
bufe += readlen;
buf[bufe] = 0;
ALOGV("Read buf: %s\n", buf);
}
}
close(subfd);
}
}
closedir(d);
done:
return 0;
}
int linklib(const char* pkgname, const char* asecLibDir, int userId)
{
char pkgdir[PKG_PATH_MAX];
char libsymlink[PKG_PATH_MAX];
struct stat s, libStat;
int rc = 0;
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) {
ALOGE("cannot create package path\n");
return -1;
}
if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) {
ALOGE("cannot create package lib symlink origin path\n");
return -1;
}
if (stat(pkgdir, &s) < 0) return -1;
if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
return -1;
}
if (chmod(pkgdir, 0700) < 0) {
ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
rc = -1;
goto out;
}
if (lstat(libsymlink, &libStat) < 0) {
if (errno != ENOENT) {
ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
} else {
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libsymlink, 1, 0) < 0) {
rc = -1;
goto out;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libsymlink) < 0) {
ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
}
}
if (symlink(asecLibDir, libsymlink) < 0) {
ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
strerror(errno));
rc = -errno;
goto out;
}
out:
if (chmod(pkgdir, s.st_mode) < 0) {
ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
rc = -errno;
}
if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
return -errno;
}
return rc;
}
static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd)
{
static const char *IDMAP_BIN = "/system/bin/idmap";
static const size_t MAX_INT_LEN = 32;
char idmap_str[MAX_INT_LEN];
snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd);
execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL);
ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno));
}
// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix)
// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap
static int flatten_path(const char *prefix, const char *suffix,
const char *overlay_path, char *idmap_path, size_t N)
{
if (overlay_path == NULL || idmap_path == NULL) {
return -1;
}
const size_t len_overlay_path = strlen(overlay_path);
// will access overlay_path + 1 further below; requires absolute path
if (len_overlay_path < 2 || *overlay_path != '/') {
return -1;
}
const size_t len_idmap_root = strlen(prefix);
const size_t len_suffix = strlen(suffix);
if (SIZE_MAX - len_idmap_root < len_overlay_path ||
SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) {
// additions below would cause overflow
return -1;
}
if (N < len_idmap_root + len_overlay_path + len_suffix) {
return -1;
}
memset(idmap_path, 0, N);
snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix);
char *ch = idmap_path + len_idmap_root;
while (*ch != '\0') {
if (*ch == '/') {
*ch = '@';
}
++ch;
}
return 0;
}
int idmap(const char *target_apk, const char *overlay_apk, uid_t uid)
{
ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid);
int idmap_fd = -1;
char idmap_path[PATH_MAX];
if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk,
idmap_path, sizeof(idmap_path)) == -1) {
ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk);
goto fail;
}
unlink(idmap_path);
idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (idmap_fd < 0) {
ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno));
goto fail;
}
if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) {
ALOGE("idmap cannot chown '%s'\n", idmap_path);
goto fail;
}
if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
ALOGE("idmap cannot chmod '%s'\n", idmap_path);
goto fail;
}
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
ALOGE("setgid(%d) failed during idmap\n", uid);
exit(1);
}
if (setuid(uid) != 0) {
ALOGE("setuid(%d) failed during idmap\n", uid);
exit(1);
}
if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) {
ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno));
exit(1);
}
run_idmap(target_apk, overlay_apk, idmap_fd);
exit(1); /* only if exec call to idmap failed */
} else {
int status = wait_child(pid);
if (status != 0) {
ALOGE("idmap failed, status=0x%04x\n", status);
goto fail;
}
}
close(idmap_fd);
return 0;
fail:
if (idmap_fd >= 0) {
close(idmap_fd);
unlink(idmap_path);
}
return -1;
}
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