MarcoBuster/Magisk
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Minor reorganization of daemons

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This commit is contained in:
topjohnwu 2018-10-12 00:50:47 -04:00
parent 619d48c97a
commit acf7c0c665
7 changed files with 117 additions and 131 deletions
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5
native/jni/daemon/bootstages.c
View File

@ -492,7 +492,7 @@ static void *start_magisk_hide(void *args) {
}
static void auto_start_magiskhide() {
if (!check_and_start_logger())
if (!start_log_daemon())
return;
char *hide_prop = getprop2(MAGISKHIDE_PROP, 1);
if (hide_prop == NULL || strcmp(hide_prop, "0") != 0) {
@ -728,6 +728,9 @@ void post_fs_data(int client) {
xmount(NULL, "/", NULL, MS_REMOUNT | MS_RDONLY, NULL);
// Start log_daemon
start_log_daemon();
LOGI("** post-fs-data mode running\n");
// Allocate buffer

36
native/jni/daemon/daemon.c
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@ -96,7 +96,7 @@ static void *request_handler(void *args) {
return NULL;
}
void main_daemon() {
static void main_daemon() {
android_logging();
#ifndef MAGISK_DEBUG
log_cb.d = nop_log;
@ -111,11 +111,8 @@ void main_daemon() {
xdup2(fd, STDIN_FILENO);
close(fd);
// Start the log monitor
check_and_start_logger();
struct sockaddr_un sun;
socklen_t len = setup_sockaddr(&sun, MAIN_DAEMON);
socklen_t len = setup_sockaddr(&sun, MAIN_SOCKET);
fd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (xbind(fd, (struct sockaddr*) &sun, len))
exit(1);
@ -149,39 +146,24 @@ void main_daemon() {
}
}
/* Connect the daemon, set sockfd, and return if new daemon is spawned */
int connect_daemon2(daemon_t d, int *sockfd) {
int connect_daemon() {
struct sockaddr_un sun;
socklen_t len = setup_sockaddr(&sun, d);
*sockfd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (connect(*sockfd, (struct sockaddr*) &sun, len)) {
socklen_t len = setup_sockaddr(&sun, MAIN_SOCKET);
int fd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (connect(fd, (struct sockaddr*) &sun, len)) {
if (getuid() != UID_ROOT || getgid() != UID_ROOT) {
fprintf(stderr, "No daemon is currently running!\n");
exit(1);
}
LOGD("client: launching new main daemon process\n");
if (fork_dont_care() == 0) {
LOGD("client: connect fail, try launching new daemon process\n");
close(*sockfd);
switch (d) {
case MAIN_DAEMON:
close(fd);
main_daemon();
break;
case LOG_DAEMON:
log_daemon();
break;
}
}
while (connect(*sockfd, (struct sockaddr*) &sun, len))
while (connect(fd, (struct sockaddr*) &sun, len))
usleep(10000);
return 1;
}
return 0;
}
int connect_daemon() {
int fd;
connect_daemon2(MAIN_DAEMON, &fd);
return fd;
}

48
native/jni/daemon/log_daemon.c
View File

@ -18,7 +18,7 @@
#include "daemon.h"
#include "flags.h"
static int loggable = 0;
int log_daemon_started = 0;
static struct vector log_cmd, clear_cmd;
static int sockfd;
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
@ -109,24 +109,10 @@ static void *logcat_thread(void *args) {
}
}
int check_and_start_logger() {
if (!loggable) {
int fd;
loggable = exec_command_sync("/system/bin/logcat", "-d", "-f", "/dev/null", NULL) == 0;
chmod("/dev/null", 0666);
if (loggable) {
connect_daemon2(LOG_DAEMON, &fd);
write_int(fd, HANDSHAKE);
close(fd);
}
}
return loggable;
}
void log_daemon() {
static void log_daemon() {
setsid();
struct sockaddr_un sun;
socklen_t len = setup_sockaddr(&sun, LOG_DAEMON);
socklen_t len = setup_sockaddr(&sun, LOG_SOCKET);
sockfd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (xbind(sockfd, (struct sockaddr*) &sun, len))
exit(1);
@ -179,10 +165,36 @@ void log_daemon() {
events[HIDE_EVENT].fd = fd;
pthread_mutex_unlock(&lock);
break;
case HANDSHAKE:
default:
close(fd);
break;
}
}
}
int start_log_daemon() {
if (!log_daemon_started) {
if (exec_command_sync("/system/bin/logcat", "-d", "-f", "/dev/null", NULL) == 0) {
if (fork_dont_care() == 0)
log_daemon();
// Wait till we can connect to log_daemon
int fd = connect_log_daemon();
write_int(fd, HANDSHAKE);
close(fd);
log_daemon_started = 1;
}
chmod("/dev/null", 0666);
}
return log_daemon_started;
}
int connect_log_daemon() {
if (!log_daemon_started)
return -1;
struct sockaddr_un sun;
socklen_t len = setup_sockaddr(&sun, LOG_SOCKET);
int fd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
while (connect(fd, (struct sockaddr*) &sun, len))
usleep(10000);
return fd;
}

11
native/jni/daemon/socket.c
View File

@ -13,18 +13,9 @@
#define ABS_SOCKET_LEN(sun) (sizeof(sun->sun_family) + strlen(sun->sun_path + 1) + 1)
socklen_t setup_sockaddr(struct sockaddr_un *sun, daemon_t d) {
socklen_t setup_sockaddr(struct sockaddr_un *sun, const char *name) {
memset(sun, 0, sizeof(*sun));
sun->sun_family = AF_LOCAL;
const char *name;
switch (d) {
case MAIN_DAEMON:
name = MAIN_SOCKET;
break;
case LOG_DAEMON:
name = LOG_SOCKET;
break;
}
strcpy(sun->sun_path + 1, name);
return ABS_SOCKET_LEN(sun);
}

9
native/jni/include/daemon.h
View File

@ -48,18 +48,17 @@ typedef enum {
// daemon.c
void main_daemon();
int connect_daemon();
int connect_daemon2(daemon_t d, int *sockfd);
// log_monitor.c
void log_daemon();
int check_and_start_logger();
extern int log_daemon_started;
int connect_log_daemon();
int start_log_daemon();
// socket.c
socklen_t setup_sockaddr(struct sockaddr_un *sun, daemon_t d);
socklen_t setup_sockaddr(struct sockaddr_un *sun, const char *name);
int create_rand_socket(struct sockaddr_un *sun);
int socket_accept(int sockfd, int timeout);
int recv_fd(int sockfd);

2
native/jni/magiskhide/magiskhide.c
View File

@ -45,7 +45,7 @@ void launch_magiskhide(int client) {
return;
}
if (!check_and_start_logger()) {
if (!log_daemon_started) {
if (client > 0) {
write_int(client, LOGCAT_DISABLED);
close(client);

7
native/jni/magiskhide/proc_monitor.c
View File

@ -125,9 +125,10 @@ void proc_monitor() {
term_thread(TERM_THREAD);
}
while(1) {
// Connect to the log daemon
connect_daemon2(LOG_DAEMON, &sockfd);
sockfd = connect_log_daemon();
if (sockfd < 0)
return;
write_int(sockfd, HIDE_CONNECT);
FILE *log_in = fdopen(sockfd, "r");
@ -202,6 +203,4 @@ void proc_monitor() {
if (fork_dont_care() == 0)
hide_daemon(pid);
}
// The other end EOF, restart the connection
}
}