mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-28 12:35:26 +00:00
95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
#include <string_view>
|
|
|
|
#include <magisk.hpp>
|
|
#include <selinux.hpp>
|
|
#include <utils.hpp>
|
|
|
|
using namespace std;
|
|
|
|
#define UNLABEL_CON "u:object_r:unlabeled:s0"
|
|
#define SYSTEM_CON "u:object_r:system_file:s0"
|
|
#define ADB_CON "u:object_r:adb_data_file:s0"
|
|
#define ROOT_CON "u:object_r:rootfs:s0"
|
|
#define MAGISK_CON "u:object_r:" SEPOL_FILE_DOMAIN ":s0"
|
|
|
|
static void restore_syscon(int dirfd) {
|
|
struct dirent *entry;
|
|
DIR *dir;
|
|
char *con;
|
|
|
|
fgetfilecon(dirfd, &con);
|
|
if (strlen(con) == 0 || strcmp(con, UNLABEL_CON) == 0)
|
|
fsetfilecon(dirfd, SYSTEM_CON);
|
|
freecon(con);
|
|
|
|
dir = xfdopendir(dirfd);
|
|
while ((entry = xreaddir(dir))) {
|
|
int fd = openat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
|
|
if (entry->d_type == DT_DIR) {
|
|
restore_syscon(fd);
|
|
} else if (entry->d_type == DT_REG) {
|
|
fgetfilecon(fd, &con);
|
|
if (con[0] == '\0' || strcmp(con, UNLABEL_CON) == 0)
|
|
fsetfilecon(fd, SYSTEM_CON);
|
|
freecon(con);
|
|
} else if (entry->d_type == DT_LNK) {
|
|
getfilecon_at(dirfd, entry->d_name, &con);
|
|
if (con[0] == '\0' || strcmp(con, UNLABEL_CON) == 0)
|
|
setfilecon_at(dirfd, entry->d_name, con);
|
|
freecon(con);
|
|
}
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
static void restore_magiskcon(int dirfd) {
|
|
struct dirent *entry;
|
|
DIR *dir;
|
|
|
|
fsetfilecon(dirfd, MAGISK_CON);
|
|
fchown(dirfd, 0, 0);
|
|
|
|
dir = xfdopendir(dirfd);
|
|
while ((entry = xreaddir(dir))) {
|
|
int fd = xopenat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
|
|
if (entry->d_type == DT_DIR) {
|
|
restore_magiskcon(fd);
|
|
} else if (entry->d_type) {
|
|
fsetfilecon(fd, MAGISK_CON);
|
|
fchown(fd, 0, 0);
|
|
}
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
void restorecon() {
|
|
int fd = xopen(SELINUX_CONTEXT, O_WRONLY | O_CLOEXEC);
|
|
if (write(fd, ADB_CON, sizeof(ADB_CON)) >= 0)
|
|
lsetfilecon(SECURE_DIR, ADB_CON);
|
|
close(fd);
|
|
lsetfilecon(MODULEROOT, SYSTEM_CON);
|
|
fd = xopen(MODULEROOT, O_RDONLY | O_CLOEXEC);
|
|
restore_syscon(fd);
|
|
close(fd);
|
|
fd = xopen(DATABIN, O_RDONLY | O_CLOEXEC);
|
|
restore_magiskcon(fd);
|
|
close(fd);
|
|
}
|
|
|
|
void restore_tmpcon() {
|
|
if (MAGISKTMP == "/sbin")
|
|
setfilecon(MAGISKTMP.data(), ROOT_CON);
|
|
else
|
|
chmod(MAGISKTMP.data(), 0700);
|
|
|
|
auto dir = xopen_dir(MAGISKTMP.data());
|
|
int dfd = dirfd(dir.get());
|
|
|
|
for (dirent *entry; (entry = xreaddir(dir.get()));) {
|
|
if (entry->d_name == "magisk"sv || entry->d_name == "magiskinit"sv)
|
|
setfilecon_at(dfd, entry->d_name, MAGISK_CON);
|
|
else
|
|
setfilecon_at(dfd, entry->d_name, ROOT_CON);
|
|
}
|
|
}
|