mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-11-28 04:25:27 +00:00
89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
|
/* daemon.c - Magisk Daemon
|
||
|
|
*
|
||
|
|
* Start the daemon and wait for requests
|
||
|
|
* Connect the daemon and send requests through sockets
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/un.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/socket.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
|
||
|
|
#include "magisk.h"
|
||
|
|
#include "utils.h"
|
||
|
|
#include "daemon.h"
|
||
|
|
|
||
|
|
static void request_handler(int client) {
|
||
|
|
/* TODO: Put all function entrypoints here
|
||
|
|
it'll currently just log the input string */
|
||
|
|
char *s = read_string(client);
|
||
|
|
close(client);
|
||
|
|
LOGI("%s\n", s);
|
||
|
|
free(s);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Setup the address and return socket fd */
|
||
|
|
static int setup_socket(struct sockaddr_un *sun) {
|
||
|
|
int fd = xsocket(AF_LOCAL, SOCK_STREAM, 0);
|
||
|
|
if (fcntl(fd, F_SETFD, FD_CLOEXEC)) {
|
||
|
|
PLOGE("fcntl FD_CLOEXEC");
|
||
|
|
}
|
||
|
|
|
||
|
|
memset(sun, 0, sizeof(*sun));
|
||
|
|
sun->sun_family = AF_LOCAL;
|
||
|
|
memcpy(sun->sun_path, REQUESTOR_DAEMON_PATH, REQUESTOR_DAEMON_PATH_LEN);
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
void start_daemon() {
|
||
|
|
// Launch the daemon, create new session, set proper context
|
||
|
|
if (getuid() != AID_ROOT || getgid() != AID_ROOT) {
|
||
|
|
PLOGE("daemon requires root. uid/gid not root");
|
||
|
|
}
|
||
|
|
switch (fork()) {
|
||
|
|
case -1:
|
||
|
|
PLOGE("fork");
|
||
|
|
case 0:
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
xsetsid();
|
||
|
|
xsetcon("u:r:su:s0");
|
||
|
|
|
||
|
|
struct sockaddr_un sun;
|
||
|
|
int fd = setup_socket(&sun);
|
||
|
|
|
||
|
|
xbind(fd, (struct sockaddr*) &sun, sizeof(sun));
|
||
|
|
xlisten(fd, 10);
|
||
|
|
|
||
|
|
// Change process name
|
||
|
|
strcpy(argv0, "magisk_daemon");
|
||
|
|
|
||
|
|
// Loop forever to listen to requests
|
||
|
|
while(1) {
|
||
|
|
request_handler(xaccept(fd, NULL, NULL));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Connect the daemon, and return a socketfd */
|
||
|
|
int connect_daemon() {
|
||
|
|
struct sockaddr_un sun;
|
||
|
|
int fd = setup_socket(&sun);
|
||
|
|
if (connect(fd, (struct sockaddr*) &sun, sizeof(sun))) {
|
||
|
|
/* If we cannot access the daemon, we start the daemon
|
||
|
|
* since there is no clear entry point when the daemon should be started
|
||
|
|
*/
|
||
|
|
start_daemon();
|
||
|
|
do {
|
||
|
|
// Wait for 10ms
|
||
|
|
usleep(10000);
|
||
|
|
} while (connect(fd, (struct sockaddr*) &sun, sizeof(sun)));
|
||
|
|
}
|
||
|
|
return fd;
|
||
|
|
}
|