Mirrors/Magisk
1
0
Fork 0
mirror of https://github.com/topjohnwu/Magisk.git synced 2025-06-12 13:17:39 +02:00
Code Issues Packages Projects Releases Wiki Activity

Update restorecon implementation

Browse Source
This commit is contained in:
topjohnwu
2018-06-03 14:43:03 +08:00
parent ef2f8d485b
commit 34dcf49fbc
6 changed files with 79 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
native/jni/utils/file.c
View File

@ -15,6 +15,7 @@
#include <selinux/selinux.h>
#endif
#include "magisk.h"
#include "utils.h"
char **excl_list = NULL;
@ -341,17 +342,22 @@ void fclone_attr(const int sourcefd, const int targetfd) {
#ifdef SELINUX
#include "magiskpolicy.h"
#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 MAGISK_CON "u:object_r:"SEPOL_FILE_DOMAIN":s0"
void restorecon(int dirfd) {
static void restore_syscon(int dirfd) {
struct dirent *entry;
DIR *dir;
int fd;
char path[PATH_MAX], *con;
fd_getpath(dirfd, path, sizeof(path));
lgetfilecon(path, &con);
size_t len = strlen(path);
getfilecon(path, &con);
if (strlen(con) == 0 || strcmp(con, UNLABEL_CON) == 0)
lsetfilecon(path, SYSTEM_CON);
freecon(con);
@ -361,20 +367,65 @@ void restorecon(int dirfd) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (entry->d_type == DT_DIR) {
fd = xopenat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
restorecon(fd);
int fd = xopenat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
restore_syscon(fd);
close(fd);
} else {
fd = xopenat(dirfd, entry->d_name, O_PATH | O_NOFOLLOW | O_CLOEXEC);
fd_getpath(fd, path, sizeof(path));
path[len] = '/';
strcpy(path + len + 1, entry->d_name);
lgetfilecon(path, &con);
if (strlen(con) == 0 || strcmp(con, UNLABEL_CON) == 0)
lsetfilecon(path, SYSTEM_CON);
freecon(con);
path[len] = '\0';
}
close(fd);
}
}
static void restore_magiskcon(int dirfd) {
struct dirent *entry;
DIR *dir;
char path[PATH_MAX];
fd_getpath(dirfd, path, sizeof(path));
size_t len = strlen(path);
lsetfilecon(path, MAGISK_CON);
lchown(path, 0, 0);
dir = xfdopendir(dirfd);
while ((entry = xreaddir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (entry->d_type == DT_DIR) {
int fd = xopenat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
restore_magiskcon(fd);
close(fd);
} else {
path[len] = '/';
strcpy(path + len + 1, entry->d_name);
lsetfilecon(path, MAGISK_CON);
lchown(path, 0, 0);
path[len] = '\0';
}
}
}
void restorecon() {
int fd;
fd = xopen(SELINUX_CONTEXT, O_WRONLY | O_CLOEXEC);
if (write(fd, ADB_CON, sizeof(ADB_CON)) >= 0) {
lsetfilecon(SECURE_DIR, ADB_CON);
}
close(fd);
fd = xopen(MOUNTPOINT, O_RDONLY | O_CLOEXEC);
restore_syscon(fd);
close(fd);
fd = xopen(DATABIN, O_RDONLY | O_CLOEXEC);
restore_magiskcon(fd);
close(fd);
}
#endif // SELINUX
static int _mmap(int rw, const char *filename, void **buf, size_t *size) {