blob: fa5ef5640b9e2507416bda4c59387921b84f8023 [file] [log] [blame]
/*
Copyright 2012 bigbiff/Dees_Troy TeamWin
This file is part of TWRP/TeamWin Recovery Project.
TWRP is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TWRP is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <vector>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include "gui/rapidxml.hpp"
#include "fixPermissions.hpp"
#include "twrp-functions.hpp"
#include "twcommon.h"
#ifdef HAVE_SELINUX
#include "selinux/selinux.h"
#include "selinux/label.h"
#include "selinux/android.h"
#include "selinux/label.h"
#endif
using namespace std;
using namespace rapidxml;
#ifdef HAVE_SELINUX
int fixPermissions::restorecon(string entry, struct stat *sb) {
char *oldcontext, *newcontext;
struct selabel_handle *sehandle;
sehandle = selinux_android_file_context_handle();
if (lgetfilecon(entry.c_str(), &oldcontext) < 0) {
LOGINFO("Couldn't get selinux context for %s\n", entry.c_str());
return -1;
}
if (selabel_lookup(sehandle, &newcontext, entry.c_str(), sb->st_mode) < 0) {
LOGINFO("Couldn't lookup selinux context for %s\n", entry.c_str());
return -1;
}
LOGINFO("Relabeling %s from %s to %s\n", entry.c_str(), oldcontext, newcontext);
if (lsetfilecon(entry.c_str(), newcontext) < 0) {
LOGINFO("Couldn't label %s with %s: %s\n", entry.c_str(), newcontext, strerror(errno));
}
freecon(oldcontext);
freecon(newcontext);
return 0;
}
int fixPermissions::fixDataDataContexts(void) {
DIR *d;
struct dirent *de;
struct stat sb;
struct selabel_handle *selinux_handle;
struct selinux_opt selinux_options[] = {
{ SELABEL_OPT_PATH, "/file_contexts" }
};
selinux_handle = selabel_open(SELABEL_CTX_FILE, selinux_options, 1);
if (!selinux_handle)
printf("No file contexts for SELinux\n");
else
printf("SELinux contexts loaded from /file_contexts\n");
d = opendir("/data/data");
while (( de = readdir(d)) != NULL) {
stat(de->d_name, &sb);
string f = "/data/data/";
f = f + de->d_name;
restorecon(f, &sb);
}
return 0;
}
#endif
int fixPermissions::fixPerms(bool enable_debug, bool remove_data_for_missing_apps) {
packageFile = "/data/system/packages.xml";
debug = enable_debug;
remove_data = remove_data_for_missing_apps;
multi_user = TWFunc::Path_Exists("/data/user");
if (!(TWFunc::Path_Exists(packageFile))) {
gui_print("Can't check permissions\n");
gui_print("after Factory Reset.\n");
gui_print("Please boot rom and try\n");
gui_print("again after you reboot into\n");
gui_print("recovery.\n");
return -1;
}
gui_print("Fixing permissions...\nLoading packages...\n");
if ((getPackages()) != 0) {
return -1;
}
gui_print("Fixing /system/app permissions...\n");
if ((fixSystemApps()) != 0) {
return -1;
}
gui_print("Fixing /data/app permissions...\n");
if ((fixDataApps()) != 0) {
return -1;
}
if (multi_user) {
DIR *d = opendir("/data/user");
string new_path, user_id;
if (d == NULL) {
LOGERR("Error opening '/data/user'\n");
return -1;
}
if (d) {
struct dirent *p;
while ((p = readdir(d))) {
if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, ".."))
continue;
new_path = "/data/user/";
new_path.append(p->d_name);
user_id = "u";
user_id += p->d_name;
user_id += "_";
if (p->d_type == DT_LNK) {
char link[512], realPath[512];
strcpy(link, new_path.c_str());
memset(realPath, 0, sizeof(realPath));
while (readlink(link, realPath, sizeof(realPath)) > 0) {
strcpy(link, realPath);
memset(realPath, 0, sizeof(realPath));
}
new_path = link;
} else if (p->d_type != DT_DIR) {
continue;
} else {
new_path.append("/");
// We're probably going to need to fix permissions on multi user but
// it will have to wait for another time. Need to figure out where
// the uid and gid is stored for other users.
continue;
}
gui_print("Fixing %s permissions...\n", new_path.c_str());
if ((fixDataData(new_path)) != 0) {
closedir(d);
return -1;
}
}
closedir(d);
}
} else {
gui_print("Fixing /data/data permissions...\n");
if ((fixDataData("/data/data/")) != 0) {
return -1;
}
}
#ifdef HAVE_SELINUX
gui_print("Fixing /data/data contexts.\n");
fixDataDataContexts();
#endif
gui_print("Done fixing permissions.\n");
return 0;
}
int fixPermissions::pchown(string fn, int puid, int pgid) {
LOGINFO("Fixing %s, uid: %d, gid: %d\n", fn.c_str(), puid, pgid);
if (chown(fn.c_str(), puid, pgid) != 0) {
LOGERR("Unable to chown '%s' %i %i\n", fn.c_str(), puid, pgid);
return -1;
}
return 0;
}
int fixPermissions::pchmod(string fn, string mode) {
long mask = 0;
LOGINFO("Fixing %s, mode: %s\n", fn.c_str(), mode.c_str());
for ( std::string::size_type n = 0; n < mode.length(); ++n) {
if (n == 0) {
if (mode[n] == '0')
continue;
else if (mode[n] == '1')
mask = S_ISVTX;
else if (mode[n] == '2')
mask = S_ISGID;
}
else if (n == 1) {
if (mode[n] == '7') {
mask |= S_IRWXU;
}
if (mode[n] == '6') {
mask |= S_IRUSR;
mask |= S_IWUSR;
}
if (mode[n] == '5') {
mask |= S_IRUSR;
mask |= S_IXUSR;
}
if (mode[n] == '4')
mask |= S_IRUSR;
if (mode[n] == '3') {
mask |= S_IWUSR;
mask |= S_IRUSR;
}
if (mode[n] == '2')
mask |= S_IWUSR;
if (mode[n] == '1')
mask |= S_IXUSR;
}
else if (n == 2) {
if (mode[n] == '7') {
mask |= S_IRWXG;
}
if (mode[n] == '6') {
mask |= S_IRGRP;
mask |= S_IWGRP;
}
if (mode[n] == '5') {
mask |= S_IRGRP;
mask |= S_IXGRP;
}
if (mode[n] == '4')
mask |= S_IRGRP;
if (mode[n] == '3') {
mask |= S_IWGRP;
mask |= S_IXGRP;
}
if (mode[n] == '2')
mask |= S_IWGRP;
if (mode[n] == '1')
mask |= S_IXGRP;
}
else if (n == 3) {
if (mode[n] == '7') {
mask |= S_IRWXO;
}
if (mode[n] == '6') {
mask |= S_IROTH;
mask |= S_IWOTH;
}
if (mode[n] == '5') {
mask |= S_IROTH;
mask |= S_IXOTH;
}
if (mode[n] == '4')
mask |= S_IROTH;
if (mode[n] == '3') {
mask |= S_IWOTH;
mask |= S_IXOTH;
}
if (mode[n] == '2')
mask |= S_IWOTH;
if (mode[n] == '1')
mask |= S_IXOTH;
}
}
if (chmod(fn.c_str(), mask) != 0) {
LOGERR("Unable to chmod '%s' %l\n", fn.c_str(), mask);
return -1;
}
return 0;
}
int fixPermissions::fixSystemApps() {
temp = head;
while (temp != NULL) {
if (TWFunc::Path_Exists(temp->codePath)) {
if (temp->appDir.compare("/system/app") == 0) {
if (debug) {
LOGINFO("Looking at '%s'\n", temp->codePath.c_str());
LOGINFO("Fixing permissions on '%s'\n", temp->pkgName.c_str());
LOGINFO("Directory: '%s'\n", temp->appDir.c_str());
LOGINFO("Original package owner: %d, group: %d\n", temp->uid, temp->gid);
}
if (pchown(temp->codePath, 0, 0) != 0)
return -1;
if (pchmod(temp->codePath, "0644") != 0)
return -1;
}
} else {
//Remove data directory since app isn't installed
if (remove_data && TWFunc::Path_Exists(temp->dDir) && temp->appDir.size() >= 9 && temp->appDir.substr(0, 9) != "/mnt/asec") {
if (debug)
LOGINFO("Looking at '%s', removing data dir: '%s', appDir: '%s'", temp->codePath.c_str(), temp->dDir.c_str(), temp->appDir.c_str());
if (TWFunc::removeDir(temp->dDir, false) != 0) {
LOGINFO("Unable to removeDir '%s'\n", temp->dDir.c_str());
return -1;
}
}
}
temp = temp->next;
}
return 0;
}
int fixPermissions::fixDataApps() {
bool fix = false;
int new_gid = 0;
string perms = "0000";
temp = head;
while (temp != NULL) {
if (TWFunc::Path_Exists(temp->codePath)) {
if (temp->appDir.compare("/data/app") == 0 || temp->appDir.compare("/sd-ext/app") == 0) {
fix = true;
new_gid = 1000;
perms = "0644";
} else if (temp->appDir.compare("/data/app-private") == 0 || temp->appDir.compare("/sd-ext/app-private") == 0) {
fix = true;
new_gid = temp->gid;
perms = "0640";
} else
fix = false;
if (fix) {
if (debug) {
LOGINFO("Looking at '%s'\n", temp->codePath.c_str());
LOGINFO("Fixing permissions on '%s'\n", temp->pkgName.c_str());
LOGINFO("Directory: '%s'\n", temp->appDir.c_str());
LOGINFO("Original package owner: %d, group: %d\n", temp->uid, temp->gid);
}
if (pchown(temp->codePath, 1000, new_gid) != 0)
return -1;
if (pchmod(temp->codePath, perms) != 0)
return -1;
}
} else {
//Remove data directory since app isn't installed
if (remove_data && TWFunc::Path_Exists(temp->dDir) && temp->appDir.size() >= 9 && temp->appDir.substr(0, 9) != "/mnt/asec") {
if (debug)
LOGINFO("Looking at '%s', removing data dir: '%s', appDir: '%s'", temp->codePath.c_str(), temp->dDir.c_str(), temp->appDir.c_str());
if (TWFunc::removeDir(temp->dDir, false) != 0) {
LOGINFO("Unable to removeDir '%s'\n", temp->dDir.c_str());
return -1;
}
}
}
temp = temp->next;
}
return 0;
}
int fixPermissions::fixAllFiles(string directory, int gid, int uid, string file_perms) {
vector <string> files;
string file;
files = listAllFiles(directory);
for (unsigned i = 0; i < files.size(); ++i) {
file = directory + "/";
file.append(files.at(i));
if (debug)
LOGINFO("Looking at file '%s'\n", file.c_str());
if (pchmod(file, file_perms) != 0)
return -1;
if (pchown(file, uid, gid) != 0)
return -1;
}
return 0;
}
int fixPermissions::fixDataData(string dataDir) {
string directory, dir;
temp = head;
while (temp != NULL) {
dir = dataDir + temp->dDir;
if (TWFunc::Path_Exists(dir)) {
vector <string> dataDataDirs = listAllDirectories(dir);
for (unsigned n = 0; n < dataDataDirs.size(); ++n) {
directory = dir + "/";
directory.append(dataDataDirs.at(n));
if (debug)
LOGINFO("Looking at data directory: '%s'\n", directory.c_str());
if (dataDataDirs.at(n) == ".") {
if (pchmod(directory, "0755") != 0)
return -1;
if (pchown(directory.c_str(), temp->uid, temp->gid) != 0)
return -1;
if (fixAllFiles(directory, temp->uid, temp->gid, "0755") != 0)
return -1;
}
else if (dataDataDirs.at(n) == "..") {
if (debug)
LOGINFO("Skipping ..\n");
continue;
}
else if (dataDataDirs.at(n) == "lib") {
if (pchmod(directory.c_str(), "0755") != 0)
return -1;
if (pchown(directory.c_str(), 1000, 1000) != 0)
return -1;
if (fixAllFiles(directory, temp->uid, temp->gid, "0755") != 0)
return -1;
}
else if (dataDataDirs.at(n) == "shared_prefs") {
if (pchmod(directory.c_str(), "0771") != 0)
return -1;
if (pchown(directory.c_str(), temp->uid, temp->gid) != 0)
return -1;
if (fixAllFiles(directory, temp->uid, temp->gid, "0660") != 0)
return -1;
}
else if (dataDataDirs.at(n) == "databases") {
if (pchmod(directory.c_str(), "0771") != 0)
return -1;
if (pchown(directory.c_str(), temp->uid, temp->gid) != 0)
return -1;
if (fixAllFiles(directory, temp->uid, temp->gid, "0660") != 0)
return -1;
}
else if (dataDataDirs.at(n) == "cache") {
if (pchmod(directory.c_str(), "0771") != 0)
return -1;
if (pchown(directory.c_str(), temp->uid, temp->gid) != 0)
return -1;
if (fixAllFiles(directory, temp->uid, temp->gid, "0600") != 0)
return -1;
}
else {
if (pchmod(directory.c_str(), "0771") != 0)
return -1;
if (pchown(directory.c_str(), temp->uid, temp->gid) != 0)
return -1;
if (fixAllFiles(directory, temp->uid, temp->gid, "0755") != 0)
return -1;
}
}
}
temp = temp->next;
}
return 0;
}
vector <string> fixPermissions::listAllDirectories(string path) {
DIR *dir = opendir(path.c_str());
vector <string> dirs;
if (dir == NULL) {
LOGERR("Error opening '%s'\n", path.c_str());
return dirs;
}
struct dirent *entry = readdir(dir);
while (entry != NULL) {
if (entry->d_type == DT_DIR)
dirs.push_back(entry->d_name);
entry = readdir(dir);
}
closedir(dir);
return dirs;
}
vector <string> fixPermissions::listAllFiles(string path) {
DIR *dir = opendir(path.c_str());
vector <string> files;
if (dir == NULL) {
LOGERR("Error opening '%s'\n", path.c_str());
return files;
}
struct dirent *entry = readdir(dir);
while (entry != NULL) {
if (entry->d_type == DT_REG)
files.push_back(entry->d_name);
entry = readdir(dir);
}
closedir(dir);
return files;
}
int fixPermissions::getPackages() {
int len = 0;
bool skiploop = false;
vector <string> skip;
string name;
head = NULL;
skip.push_back("/system/framework/framework-res.apk");
skip.push_back("/system/framework/com.htc.resources.apk");
ifstream xmlFile(packageFile.c_str());
xmlFile.seekg(0, ios::end);
len = (int) xmlFile.tellg();
xmlFile.seekg(0, ios::beg);
char xmlBuf[len + 1];
xmlFile.read(&xmlBuf[0], len);
xmlBuf[len] = '\0';
xml_document<> pkgDoc;
LOGINFO("parsing package, %i...\n", len);
pkgDoc.parse<parse_full>(&xmlBuf[0]);
xml_node<> * pkgNode = pkgDoc.first_node("packages");
if (pkgNode == NULL) {
LOGERR("No packages found to fix.\n");
return -1;
}
xml_node <> * next = pkgNode->first_node("package");
if (next == NULL) {
LOGERR("No package found to fix.\n");
return -1;
}
//Get packages
while (next->first_attribute("name") != NULL) {
package* temp = new package;
for (unsigned n = 0; n < skip.size(); ++n) {
if (skip.at(n).compare(next->first_attribute("codePath")->value()) == 0) {
skiploop = true;
break;
}
}
if (skiploop == true) {
if (debug)
LOGINFO("Skipping package %s\n", next->first_attribute("codePath")->value());
free(temp);
next = next->next_sibling();
skiploop = false;
continue;
}
name.append((next->first_attribute("name")->value()));
temp->pkgName = next->first_attribute("name")->value();
if (debug)
LOGINFO("Loading pkg: %s\n", next->first_attribute("name")->value());
if (next->first_attribute("codePath") == NULL) {
LOGINFO("Problem with codePath on %s\n", next->first_attribute("name")->value());
} else {
temp->codePath = next->first_attribute("codePath")->value();
temp->app = basename(next->first_attribute("codePath")->value());
temp->appDir = dirname(next->first_attribute("codePath")->value());
}
temp->dDir = name;
if ( next->first_attribute("sharedUserId") != NULL) {
temp->uid = atoi(next->first_attribute("sharedUserId")->value());
temp->gid = atoi(next->first_attribute("sharedUserId")->value());
}
else {
if (next->first_attribute("userId") == NULL) {
LOGINFO("Problem with userID on %s\n", next->first_attribute("name")->value());
} else {
temp->uid = atoi(next->first_attribute("userId")->value());
temp->gid = atoi(next->first_attribute("userId")->value());
}
}
temp->next = head;
head = temp;
if (next->next_sibling("package") == NULL)
break;
name.clear();
next = next->next_sibling("package");
}
//Get updated packages
next = pkgNode->first_node("updated-package");
if (next != NULL) {
while (next->first_attribute("name") != NULL) {
package* temp = new package;
for (unsigned n = 0; n < skip.size(); ++n) {
if (skip.at(n).compare(next->first_attribute("codePath")->value()) == 0) {
skiploop = true;
break;
}
}
if (skiploop == true) {
if (debug)
LOGINFO("Skipping package %s\n", next->first_attribute("codePath")->value());
free(temp);
next = next->next_sibling();
skiploop = false;
continue;
}
name.append((next->first_attribute("name")->value()));
temp->pkgName = next->first_attribute("name")->value();
if (debug)
LOGINFO("Loading pkg: %s\n", next->first_attribute("name")->value());
if (next->first_attribute("codePath") == NULL) {
LOGINFO("Problem with codePath on %s\n", next->first_attribute("name")->value());
} else {
temp->codePath = next->first_attribute("codePath")->value();
temp->app = basename(next->first_attribute("codePath")->value());
temp->appDir = dirname(next->first_attribute("codePath")->value());
}
temp->dDir = name;
if ( next->first_attribute("sharedUserId") != NULL) {
temp->uid = atoi(next->first_attribute("sharedUserId")->value());
temp->gid = atoi(next->first_attribute("sharedUserId")->value());
}
else {
if (next->first_attribute("userId") == NULL) {
LOGINFO("Problem with userID on %s\n", next->first_attribute("name")->value());
} else {
temp->uid = atoi(next->first_attribute("userId")->value());
temp->gid = atoi(next->first_attribute("userId")->value());
}
}
temp->next = head;
head = temp;
if (next->next_sibling("package") == NULL)
break;
name.clear();
next = next->next_sibling("package");
}
}
return 0;
}