blob: 9aa70a4582402c3e9c1bd7bb7660a90c209742be [file] [log] [blame]
/*
** 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 "installd.h"
#include <diskusage/dirsize.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_array_t android_system_dirs;
int install(const char *pkgname, uid_t uid, gid_t gid)
{
char pkgdir[PKG_PATH_MAX];
char libdir[PKG_PATH_MAX];
if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
LOGE("invalid uid/gid: %d %d\n", uid, gid);
return -1;
}
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
LOGE("cannot create package path\n");
return -1;
}
if (create_pkg_path(libdir, pkgname, PKG_LIB_POSTFIX, 0)) {
LOGE("cannot create package lib path\n");
return -1;
}
if (mkdir(pkgdir, 0751) < 0) {
LOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
return -errno;
}
if (chmod(pkgdir, 0751) < 0) {
LOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (chown(pkgdir, uid, gid) < 0) {
LOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (mkdir(libdir, 0755) < 0) {
LOGE("cannot create dir '%s': %s\n", libdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
if (chmod(libdir, 0755) < 0) {
LOGE("cannot chmod dir '%s': %s\n", libdir, strerror(errno));
unlink(libdir);
unlink(pkgdir);
return -errno;
}
if (chown(libdir, AID_SYSTEM, AID_SYSTEM) < 0) {
LOGE("cannot chown dir '%s': %s\n", libdir, strerror(errno));
unlink(libdir);
unlink(pkgdir);
return -errno;
}
return 0;
}
int uninstall(const char *pkgname, uid_t persona)
{
char pkgdir[PKG_PATH_MAX];
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
return -1;
/* 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) {
LOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
return -errno;
}
return 0;
}
int delete_user_data(const char *pkgname, uid_t persona)
{
char pkgdir[PKG_PATH_MAX];
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
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, uid_t persona)
{
char pkgdir[PKG_PATH_MAX];
char real_libdir[PKG_PATH_MAX];
// Create the data dir for the package
if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) {
return -1;
}
if (mkdir(pkgdir, 0751) < 0) {
LOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
return -errno;
}
if (chown(pkgdir, uid, uid) < 0) {
LOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
unlink(pkgdir);
return -errno;
}
return 0;
}
int delete_persona(uid_t persona)
{
char pkgdir[PKG_PATH_MAX];
if (create_persona_path(pkgdir, persona))
return -1;
return delete_dir_contents(pkgdir, 1, NULL);
}
int delete_cache(const char *pkgname)
{
char cachedir[PKG_PATH_MAX];
if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, 0))
return -1;
/* delete contents, not the directory, no exceptions */
return delete_dir_contents(cachedir, 0, 0);
}
static int64_t disk_free()
{
struct statfs sfs;
if (statfs(android_data_dir.path, &sfs) == 0) {
return sfs.f_bavail * sfs.f_bsize;
} else {
LOGE("Couldn't statfs %s: %s\n", android_data_dir.path, strerror(errno));
return -1;
}
}
/* 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)
{
const char *name;
int dfd, subfd;
DIR *d;
struct dirent *de;
int64_t avail;
avail = disk_free();
if (avail < 0) return -1;
LOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
if (avail >= free_size) return 0;
d = opendir(android_data_dir.path);
if (d == NULL) {
LOGE("cannot open %s: %s\n", android_data_dir.path, strerror(errno));
return -1;
}
dfd = dirfd(d);
while ((de = readdir(d))) {
if (de->d_type != DT_DIR) continue;
name = de->d_name;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
if (subfd < 0) continue;
delete_dir_contents_fd(subfd, "cache");
close(subfd);
avail = disk_free();
if (avail >= free_size) {
closedir(d);
return 0;
}
}
closedir(d);
/* Fail case - not possible to free space */
return -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;
LOGI("move %s -> %s\n", src_dex, dst_dex);
if (rename(src_dex, dst_dex) < 0) {
LOGE("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;
LOGI("unlink %s\n", dex_path);
if (unlink(dex_path) < 0) {
LOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
return -1;
} else {
return 0;
}
}
int protect(char *pkgname, gid_t gid)
{
struct stat s;
char pkgpath[PKG_PATH_MAX];
if (gid < AID_SYSTEM) return -1;
if (create_pkg_path_in_dir(pkgpath, &android_app_private_dir, pkgname, ".apk"))
return -1;
if (stat(pkgpath, &s) < 0) return -1;
if (chown(pkgpath, s.st_uid, gid) < 0) {
LOGE("failed to chgrp '%s': %s\n", pkgpath, strerror(errno));
return -1;
}
if (chmod(pkgpath, S_IRUSR|S_IWUSR|S_IRGRP) < 0) {
LOGE("failed to chmod '%s': %s\n", pkgpath, strerror(errno));
return -1;
}
return 0;
}
int get_size(const char *pkgname, const char *apkpath,
const char *fwdlock_apkpath,
int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize)
{
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;
/* 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);
}
}
if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, 0)) {
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;
/* always skip "." and ".." */
if (name[0] == '.') {
if (name[1] == 0) continue;
if ((name[1] == '.') && (name[2] == 0)) continue;
}
subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
if (subfd >= 0) {
int64_t size = calculate_dir_size(subfd);
if (!strcmp(name,"lib")) {
codesize += size;
} else if(!strcmp(name,"cache")) {
cachesize += size;
} else {
datasize += size;
}
}
} else {
if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
datasize += stat_size(&s);
}
}
}
closedir(d);
done:
*_codesize = codesize;
*_datasize = datasize;
*_cachesize = cachesize;
return 0;
}
/* a simpler version of dexOptGenerateCacheFileName() */
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* 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);
execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
dexopt_flags, (char*) NULL);
LOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
}
static int wait_dexopt(pid_t pid, const char* apk_path)
{
int status;
pid_t got_pid;
/*
* Wait for the optimization process to finish.
*/
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) {
LOGW("waitpid failed: wanted %d, got %d: %s\n",
(int) pid, (int) got_pid, strerror(errno));
return 1;
}
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
LOGD("DexInv: --- END '%s' (success) ---\n", apk_path);
return 0;
} else {
LOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n",
apk_path, status);
return status; /* always nonzero */
}
}
int dexopt(const char *apk_path, uid_t uid, int is_public)
{
struct utimbuf ut;
struct stat apk_stat, dex_stat;
char dex_path[PKG_PATH_MAX];
char dexopt_flags[PROPERTY_VALUE_MAX];
char *end;
int res, zip_fd=-1, odex_fd=-1;
/* Before anything else: is there a .odex file? If so, we have
* pre-optimized the apk and there is nothing to do here.
*/
if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
return -1;
}
/* platform-specific flags affecting optimization and verification */
property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
strcpy(dex_path, apk_path);
end = strrchr(dex_path, '.');
if (end != NULL) {
strcpy(end, ".odex");
if (stat(dex_path, &dex_stat) == 0) {
return 0;
}
}
if (create_cache_path(dex_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) {
LOGE("dexopt cannot open '%s' for input\n", apk_path);
return -1;
}
unlink(dex_path);
odex_fd = open(dex_path, O_RDWR | O_CREAT | O_EXCL, 0644);
if (odex_fd < 0) {
LOGE("dexopt cannot open '%s' for output\n", dex_path);
goto fail;
}
if (fchown(odex_fd, AID_SYSTEM, uid) < 0) {
LOGE("dexopt cannot chown '%s'\n", dex_path);
goto fail;
}
if (fchmod(odex_fd,
S_IRUSR|S_IWUSR|S_IRGRP |
(is_public ? S_IROTH : 0)) < 0) {
LOGE("dexopt cannot chmod '%s'\n", dex_path);
goto fail;
}
LOGD("DexInv: --- BEGIN '%s' ---\n", apk_path);
pid_t pid;
pid = fork();
if (pid == 0) {
/* child -- drop privileges before continuing */
if (setgid(uid) != 0) {
LOGE("setgid(%d) failed during dexopt\n", uid);
exit(64);
}
if (setuid(uid) != 0) {
LOGE("setuid(%d) during dexopt\n", uid);
exit(65);
}
if (flock(odex_fd, LOCK_EX | LOCK_NB) != 0) {
LOGE("flock(%s) failed: %s\n", dex_path, strerror(errno));
exit(66);
}
run_dexopt(zip_fd, odex_fd, apk_path, dexopt_flags);
exit(67); /* only get here on exec failure */
} else {
res = wait_dexopt(pid, apk_path);
if (res != 0) {
LOGE("dexopt failed on '%s' res = %d\n", dex_path, res);
goto fail;
}
}
ut.actime = apk_stat.st_atime;
ut.modtime = apk_stat.st_mtime;
utime(dex_path, &ut);
close(odex_fd);
close(zip_fd);
return 0;
fail:
if (odex_fd >= 0) {
close(odex_fd);
unlink(dex_path);
}
if (zip_fd >= 0) {
close(zip_fd);
}
return -1;
}
int create_move_path(char path[PKG_PATH_MAX],
const char* pkgname,
const char* leaf,
uid_t persona)
{
if ((android_data_dir.len + strlen(pkgname) + strlen(leaf) + 1) >= PKG_PATH_MAX) {
return -1;
}
sprintf(path, "%s%s%s/%s", android_data_dir.path, PRIMARY_USER_PREFIX, pkgname, leaf);
return 0;
}
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) {
LOGI("Making directory: %s\n", path);
if (mkdir(path, mode) == 0) {
chown(path, uid, gid);
} else {
LOGW("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) {
LOGW("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);
LOGI("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
if (rename(srcpath, dstpath) >= 0) {
if (chown(dstpath, dstuid, dstgid) < 0) {
LOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
unlink(dstpath);
return 1;
}
} else {
LOGW("Unable to rename %s to %s: %s\n",
srcpath, dstpath, strerror(errno));
return 1;
}
return 0;
}
d = opendir(srcpath);
if (d == NULL) {
LOGW("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)) {
LOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
continue;
}
if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
LOGW("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) {
LOGW("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;
LOGV("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) {
LOGW("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 {
LOGV("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) {
LOGW("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;
LOGW("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;
LOGW("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;
LOGW("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;
LOGW("Can't create path %s in %s%s\n",
div, UPDATE_COMMANDS_DIR_PREFIX, name);
}
}
LOGV("Transfering from %s to %s: uid=%d\n",
srcpkg, dstpkg, dstuid);
}
}
}
bufp = bufi+1;
} else {
if (bufp == 0) {
if (bufp < bufe) {
LOGW("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) {
LOGW("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;
LOGV("Read buf: %s\n", buf);
}
}
close(subfd);
}
}
closedir(d);
done:
return 0;
}
int linklib(const char* dataDir, const char* asecLibDir)
{
char libdir[PKG_PATH_MAX];
struct stat s, libStat;
int rc = 0;
const size_t libdirLen = strlen(dataDir) + strlen(PKG_LIB_POSTFIX);
if (libdirLen >= PKG_PATH_MAX) {
LOGE("library dir len too large");
return -1;
}
if (snprintf(libdir, sizeof(libdir), "%s%s", dataDir, PKG_LIB_POSTFIX) != (ssize_t)libdirLen) {
LOGE("library dir not written successfully: %s\n", strerror(errno));
return -1;
}
if (stat(dataDir, &s) < 0) return -1;
if (chown(dataDir, 0, 0) < 0) {
LOGE("failed to chown '%s': %s\n", dataDir, strerror(errno));
return -1;
}
if (chmod(dataDir, 0700) < 0) {
LOGE("failed to chmod '%s': %s\n", dataDir, strerror(errno));
rc = -1;
goto out;
}
if (lstat(libdir, &libStat) < 0) {
LOGE("couldn't stat lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libdir, 1, 0) < 0) {
rc = -1;
goto out;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libdir) < 0) {
rc = -1;
goto out;
}
}
if (symlink(asecLibDir, libdir) < 0) {
LOGE("couldn't symlink directory '%s' -> '%s': %s\n", libdir, asecLibDir, strerror(errno));
rc = -errno;
goto out;
}
if (lchown(libdir, AID_SYSTEM, AID_SYSTEM) < 0) {
LOGE("cannot chown dir '%s': %s\n", libdir, strerror(errno));
unlink(libdir);
rc = -errno;
goto out;
}
out:
if (chmod(dataDir, s.st_mode) < 0) {
LOGE("failed to chmod '%s': %s\n", dataDir, strerror(errno));
return -errno;
}
if (chown(dataDir, s.st_uid, s.st_gid) < 0) {
LOGE("failed to chown '%s' : %s\n", dataDir, strerror(errno));
return -errno;
}
return rc;
}
int unlinklib(const char* dataDir)
{
char libdir[PKG_PATH_MAX];
struct stat s, libStat;
int rc = 0;
const size_t libdirLen = strlen(dataDir) + strlen(PKG_LIB_POSTFIX);
if (libdirLen >= PKG_PATH_MAX) {
return -1;
}
if (snprintf(libdir, sizeof(libdir), "%s%s", dataDir, PKG_LIB_POSTFIX) != (ssize_t)libdirLen) {
LOGE("library dir not written successfully: %s\n", strerror(errno));
return -1;
}
if (stat(dataDir, &s) < 0) {
LOGE("couldn't state data dir");
return -1;
}
if (chown(dataDir, 0, 0) < 0) {
LOGE("failed to chown '%s': %s\n", dataDir, strerror(errno));
return -1;
}
if (chmod(dataDir, 0700) < 0) {
LOGE("failed to chmod '%s': %s\n", dataDir, strerror(errno));
rc = -1;
goto out;
}
if (lstat(libdir, &libStat) < 0) {
LOGE("couldn't stat lib dir: %s\n", strerror(errno));
rc = -1;
goto out;
}
if (S_ISDIR(libStat.st_mode)) {
if (delete_dir_contents(libdir, 1, 0) < 0) {
rc = -1;
goto out;
}
} else if (S_ISLNK(libStat.st_mode)) {
if (unlink(libdir) < 0) {
rc = -1;
goto out;
}
}
if (mkdir(libdir, 0755) < 0) {
LOGE("cannot create dir '%s': %s\n", libdir, strerror(errno));
rc = -errno;
goto out;
}
if (chown(libdir, AID_SYSTEM, AID_SYSTEM) < 0) {
LOGE("cannot chown dir '%s': %s\n", libdir, strerror(errno));
unlink(libdir);
rc = -errno;
goto out;
}
out:
if (chmod(dataDir, s.st_mode) < 0) {
LOGE("failed to chmod '%s': %s\n", dataDir, strerror(errno));
return -1;
}
if (chown(dataDir, s.st_uid, s.st_gid) < 0) {
LOGE("failed to chown '%s' : %s\n", dataDir, strerror(errno));
return -1;
}
return rc;
}