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Cleanup file descriptors and add more info

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This commit is contained in:
topjohnwu 2017-07-08 23:51:58 +08:00
parent b9968aa1e6
commit b570b363d9
12 changed files with 41 additions and 53 deletions
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26
jni/daemon/daemon.c
View File

@ -23,7 +23,6 @@
#include "magiskpolicy.h"
pthread_t sepol_patch;
int null_fd;
static void *request_handler(void *args) {
// Setup the default error handler for threads
@ -89,17 +88,12 @@ static void *request_handler(void *args) {
default:
break;
}
// Just in case
close(client);
return NULL;
}
/* 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");
int fd = xsocket(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0);
memset(sun, 0, sizeof(*sun));
sun->sun_family = AF_LOCAL;
memcpy(sun->sun_path, REQUESTOR_DAEMON_PATH, REQUESTOR_DAEMON_PATH_LEN);
@ -137,10 +131,11 @@ void start_daemon(int client) {
xsetsid();
setcon("u:r:su:s0");
umask(022);
null_fd = xopen("/dev/null", O_RDWR | O_CLOEXEC);
xdup2(null_fd, STDIN_FILENO);
xdup2(null_fd, STDOUT_FILENO);
xdup2(null_fd, STDERR_FILENO);
int fd = xopen("/dev/null", O_RDWR | O_CLOEXEC);
xdup2(fd, STDIN_FILENO);
xdup2(fd, STDOUT_FILENO);
xdup2(fd, STDERR_FILENO);
close(fd);
// Patch selinux with medium patch before we do anything
load_policydb(SELINUX_POLICY);
@ -151,7 +146,7 @@ void start_daemon(int client) {
pthread_create(&sepol_patch, NULL, large_sepol_patch, NULL);
struct sockaddr_un sun;
int fd = setup_socket(&sun);
fd = setup_socket(&sun);
xbind(fd, (struct sockaddr*) &sun, sizeof(sun));
xlisten(fd, 10);
@ -162,7 +157,7 @@ void start_daemon(int client) {
// It should stay intact under any circumstances
err_handler = do_nothing;
LOGI("Magisk v" xstr(MAGISK_VERSION) " daemon started\n");
LOGI("Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") daemon started\n");
// Unlock all blocks for rw
unlock_blocks();
@ -178,9 +173,7 @@ void start_daemon(int client) {
// Loop forever to listen for requests
while(1) {
int *client = xmalloc(sizeof(int));
*client = xaccept(fd, NULL, NULL);
// Just in case, set to close on exec
fcntl(*client, F_SETFD, FD_CLOEXEC);
*client = xaccept4(fd, NULL, NULL, SOCK_CLOEXEC);
pthread_t thread;
xpthread_create(&thread, NULL, request_handler, client);
// Detach the thread, we will never join it
@ -192,7 +185,6 @@ void start_daemon(int client) {
int connect_daemon() {
struct sockaddr_un sun;
int fd = setup_socket(&sun);
// LOGD("client: trying to connect socket\n");
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

1
jni/magisk.h
View File

@ -75,7 +75,6 @@ extern char *argv0; /* For changing process name */
extern char *applet[];
extern int (*applet_main[]) (int, char *[]);
extern int null_fd;
// Multi-call entrypoints
int magiskhide_main(int argc, char *argv[]);

2
jni/magiskboot/main.c
View File

@ -58,7 +58,7 @@ static void usage(char *arg0) {
}
int main(int argc, char *argv[]) {
printf("MagiskBoot v" xstr(MAGISK_VERSION) " (by topjohnwu) - Boot Image Modification Tool\n\n");
printf("MagiskBoot v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) - Boot Image Modification Tool\n\n");
if (argc > 1 && strcmp(argv[1], "--cleanup") == 0) {
cleanup();

1
jni/magiskhide/hide_daemon.c
View File

@ -53,6 +53,7 @@ int hide_daemon() {
// Set the process name
strcpy(argv0, "magiskhide_daemon");
LOGD("hide_daemon: listening for hide requests");
// When an error occurs, report its failure to main process
err_handler = hide_daemon_err;

34
jni/magiskhide/magiskhide.c
View File

@ -16,7 +16,6 @@
#include "daemon.h"
#include "resetprop.h"
int sv[2], hide_pid = -1;
struct vector *hide_list = NULL;
int hideEnabled = 0;
@ -29,7 +28,7 @@ void kill_proc(int pid) {
static void usage(char *arg0) {
fprintf(stderr,
"MagiskHide v" xstr(MAGISK_VERSION) " (by topjohnwu) - Hide Magisk!\n\n"
"MagiskHide v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) - Hide Magisk!\n\n"
"%s [--options [arguments...] ]\n\n"
"Options:\n"
" --enable: Start the magiskhide daemon\n"
@ -63,19 +62,6 @@ void launch_magiskhide(int client) {
hide_sensitive_props();
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv) == -1)
goto error;
/*
* The setns system call do not support multithread processes
* We have to fork a new process, and communicate with sockets
*/
if (hide_daemon())
goto error;
close(sv[1]);
// Initialize the mutex lock
pthread_mutex_init(&hide_lock, NULL);
pthread_mutex_init(&file_lock, NULL);
@ -87,8 +73,10 @@ void launch_magiskhide(int client) {
// Add SafetyNet by default
add_list(strdup("com.google.android.gms.unstable"));
write_int(client, DAEMON_SUCCESS);
close(client);
if (client > 0) {
write_int(client, DAEMON_SUCCESS);
close(client);
}
// Get thread reference
proc_monitor_thread = pthread_self();
@ -98,15 +86,9 @@ void launch_magiskhide(int client) {
error:
hideEnabled = 0;
write_int(client, DAEMON_ERROR);
close(client);
if (hide_pid != -1) {
int kill = -1;
// Kill hide daemon
write(sv[0], &kill, sizeof(kill));
close(sv[0]);
waitpid(hide_pid, NULL, 0);
hide_pid = -1;
if (client > 0) {
write_int(client, DAEMON_ERROR);
close(client);
}
return;
}

16
jni/magiskhide/proc_monitor.c
View File

@ -22,6 +22,8 @@ static char init_ns[32], zygote_ns[2][32];
static int log_pid, log_fd;
static char *buffer;
int sv[2], hide_pid = -1;
// Workaround for the lack of pthread_cancel
static void quit_pthread(int sig) {
err_handler = do_nothing;
@ -103,10 +105,22 @@ void proc_monitor() {
LOGI("proc_monitor: zygote ns=%s\n", zygote_ns[0]);
break;
case 2:
LOGI("proc_monitor: zygote (32-bit) ns=%s (64-bit) ns=%s\n", zygote_ns[0], zygote_ns[1]);
LOGI("proc_monitor: zygote ns=%s zygote64 ns=%s\n", zygote_ns[0], zygote_ns[1]);
break;
}
if (socketpair(AF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, sv) == -1)
quit_pthread(SIGUSR1);
/*
* The setns system call do not support multithread processes
* We have to fork a new process, and communicate with sockets
*/
if (hide_daemon())
quit_pthread(SIGUSR1);
close(sv[1]);
while (1) {
// Clear previous buffer
system("logcat -b events -c");

2
jni/magiskpolicy

@ -1 +1 @@
Subproject commit 193d160bed24f75d2dd440063bfc00d7920cf789
Subproject commit 5529dab84e44856679406edd6560d26c61e1e715

2
jni/main.c
View File

@ -22,7 +22,7 @@ __thread void (*err_handler)(void);
static void usage() {
fprintf(stderr,
"Magisk v" xstr(MAGISK_VERSION) " multi-call binary\n"
"Magisk v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) multi-call binary\n"
"\n"
"Usage: %s [applet [arguments]...]\n"
" or: %s --install [SOURCE] <DIR> \n"

2
jni/resetprop/resetprop.cpp
View File

@ -108,7 +108,7 @@ static bool is_legal_property_name(const char* name, size_t namelen) {
static int usage(char* arg0) {
fprintf(stderr,
"resetprop v" xstr(MAGISK_VERSION) " (by topjohnwu & nkk71) - System Props Modification Tool\n\n"
"resetprop v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu & nkk71) - System Props Modification Tool\n\n"
"Usage: %s [options] [args...]\n"
"%s <name> <value>: Set property entry <name> with <value>\n"
"%s --file <prop file>: Load props from <prop file>\n"

2
jni/su

@ -1 +1 @@
Subproject commit 91ea6801679ddd0b05c893065520acb29f713e6f
Subproject commit e2821025ef7348085958ac8f76e51b08b0e9647f

2
jni/utils/utils.h
View File

@ -40,7 +40,7 @@ int xsocket(int domain, int type, int protocol);
int xbind(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
int xconnect(int sockfd, const struct sockaddr *addr, socklen_t addrlen);
int xlisten(int sockfd, int backlog);
int xaccept(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
int xaccept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags);
void *xmalloc(size_t size);
void *xcalloc(size_t nmemb, size_t size);
void *xrealloc(void *ptr, size_t size);

4
jni/utils/xwrap.c
View File

@ -155,8 +155,8 @@ int xlisten(int sockfd, int backlog) {
return ret;
}
int xaccept(int sockfd, struct sockaddr *addr, socklen_t *addrlen) {
int fd = accept(sockfd, addr, addrlen);
int xaccept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags) {
int fd = accept4(sockfd, addr, addrlen, flags);
if (fd == -1) {
PLOGE("accept");
}