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Fix selinux context on Magisk files

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topjohnwu
2017-10-12 03:39:39 +08:00
parent 25bdbcf526
commit fe4b3df7e9
5 changed files with 57 additions and 8 deletions
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32
jni/utils/file.c
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@@ -270,3 +270,35 @@ void fclone_attr(const int sourcefd, const int targetfd) {
fgetattr(sourcefd, &a);
fsetattr(targetfd, &a);
}
#define UNLABEL_CON "u:object_r:unlabeled:s0"
#define SYSTEM_CON "u:object_r:system_file:s0"
void restorecon(int dirfd, int force) {
struct dirent *entry;
DIR *dir;
int fd;
char *con;
fgetfilecon(dirfd, &con);
if (force || strlen(con) == 0 || strcmp(con, UNLABEL_CON) == 0)
fsetfilecon(dirfd, SYSTEM_CON);
freecon(con);
dir = fdopendir(dirfd);
while ((entry = readdir(dir))) {
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
if (entry->d_type == DT_DIR) {
fd = openat(dirfd, entry->d_name, O_RDONLY | O_CLOEXEC);
restorecon(fd, force);
} else {
fd = openat(dirfd, entry->d_name, O_PATH | O_NOFOLLOW | O_CLOEXEC);
fgetfilecon(fd, &con);
if (force || strlen(con) == 0 || strcmp(con, UNLABEL_CON) == 0)
fsetfilecon(fd, SYSTEM_CON);
freecon(con);
}
close(fd);
}
}