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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
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@@ -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