Magisk/jni/magiskhide/magiskhide.c

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/* magiskhide.c - initialize the environment for Magiskhide
*/
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// TODO: Functions to modify hiding list
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
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#include <signal.h>
#include <string.h>
#include <sys/wait.h>
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#include <sys/types.h>
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#include "magisk.h"
#include "utils.h"
#include "magiskhide.h"
#include "daemon.h"
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#include "resetprop.h"
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int sv[2], hide_pid = -1;
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struct vector *hide_list = NULL;
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int hideEnabled = 0;
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static pthread_t proc_monitor_thread;
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pthread_mutex_t hide_lock;
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void kill_proc(int pid) {
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kill(pid, SIGTERM);
}
static void usage(char *arg0) {
fprintf(stderr,
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"MagiskHide v" xstr(MAGISK_VERSION) " (by topjohnwu) - Hide Magisk!\n\n"
"%s [--options [arguments...] ]\n\n"
"Options:\n"
" --enable: Start the magiskhide daemon\n"
" --disable: Stop the magiskhide daemon\n"
" --add <process name>: Add <process name> to the list\n"
" --rm <process name>: Remove <process name> from the list\n"
" --ls: Print out the current hide list\n"
, arg0);
exit(1);
}
void launch_magiskhide(int client) {
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// We manually handle crashes
err_handler = do_nothing;
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if (hideEnabled) {
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write_int(client, HIDE_IS_ENABLED);
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close(client);
return;
}
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LOGI("* Starting MagiskHide\n");
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hideEnabled = 1;
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if (init_resetprop())
goto error;
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if (client != -1) {
if (setprop("persist.magisk.hide", "1"))
goto error;
}
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hide_sensitive_props();
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, sv) == -1)
goto error;
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/*
* 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;
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close(sv[1]);
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// Initialize the hide list
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if (init_list())
goto error;
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// Add SafetyNet by default
add_list(strdup("com.google.android.gms.unstable"));
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// Initialize the mutex lock
pthread_mutex_init(&hide_lock, NULL);
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write_int(client, HIDE_SUCCESS);
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close(client);
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// Get thread reference
proc_monitor_thread = pthread_self();
// Start monitoring
proc_monitor();
return;
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error:
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hideEnabled = 0;
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write_int(client, HIDE_ERROR);
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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);
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hide_pid = -1;
}
return;
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}
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void stop_magiskhide(int client) {
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if (!hideEnabled) {
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write_int(client, HIDE_NOT_ENABLED);
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close(client);
return;
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}
LOGI("* Stopping MagiskHide\n");
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hideEnabled = 0;
setprop("persist.magisk.hide", "0");
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pthread_kill(proc_monitor_thread, SIGUSR1);
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write_int(client, HIDE_SUCCESS);
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close(client);
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}
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int magiskhide_main(int argc, char *argv[]) {
if (argc < 2) {
usage(argv[0]);
}
client_request req;
if (strcmp(argv[1], "--enable") == 0) {
req = LAUNCH_MAGISKHIDE;
} else if (strcmp(argv[1], "--disable") == 0) {
req = STOP_MAGISKHIDE;
} else if (strcmp(argv[1], "--add") == 0 && argc > 2) {
req = ADD_HIDELIST;
} else if (strcmp(argv[1], "--rm") == 0 && argc > 2) {
req = RM_HIDELIST;
} else if (strcmp(argv[1], "--ls") == 0) {
FILE *fp = xfopen(HIDELIST, "r");
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char buffer[512];
while (fgets(buffer, sizeof(buffer), fp)) {
printf("%s", buffer);
}
fclose(fp);
return 0;
}
int fd = connect_daemon();
write_int(fd, req);
if (req == ADD_HIDELIST || req == RM_HIDELIST) {
write_string(fd, argv[2]);
}
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hide_ret code = read_int(fd);
close(fd);
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switch (code) {
case HIDE_ERROR:
fprintf(stderr, "Error occured in daemon...\n");
break;
case HIDE_SUCCESS:
break;
case HIDE_NOT_ENABLED:
fprintf(stderr, "Magisk hide is not enabled yet\n");
break;
case HIDE_IS_ENABLED:
fprintf(stderr, "Magisk hide is already enabled\n");
break;
case HIDE_ITEM_EXIST:
fprintf(stderr, "Process [%s] already exists in hide list\n", argv[2]);
break;
case HIDE_ITEM_NOT_EXIST:
fprintf(stderr, "Process [%s] does not exist in hide list\n", argv[2]);
break;
}
return code;
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}