Magisk/jni/magiskhide.c
2016-10-06 02:21:12 +08:00

122 lines
2.8 KiB
C

typedef unsigned short int sa_family_t;
//Linux includes
#define _LINUX_TIME_H
#define _GNU_SOURCE
#include <sys/types.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/connector.h>
#include <linux/cn_proc.h>
#include <linux/netlink.h>
#include <linux/fs.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
#include <sys/mount.h>
#define HIDE_LIST "/magisk/.core/hidelist"
//WARNING: Calling this will change our current namespace
//We don't care because we don't want to run from here anyway
int hideMagisk(int pid) {
char *path = NULL;
asprintf(&path, "/proc/%d/ns/mnt", pid);
int fd = open(path, O_RDONLY);
if(fd == -1) return 2;
//TODO: Fix non arm platforms
#define SYS_setns 375
int res = syscall(SYS_setns, fd, 0);
if(res == -1) return 3;
res = umount2("/magisk", MNT_DETACH);
if(res == -1) return 4;
res = mount("/magisk/.core/mirror/system", "/system", "bind", MS_BIND, "");
if(res == -1) return 4;
return 0;
}
int main(int argc, char **argv, char **envp) {
// Read config file
int allocated = 16, line = 0, i;
char buffer[512];
char **list = (char **) malloc(sizeof(char*) * allocated);
FILE *fp = fopen(HIDE_LIST, "r");
if (fp == NULL){
fprintf(stderr, "Error opening hide list\n");
exit(1);
}
while (1) {
if (fgets(buffer, sizeof(buffer), fp) == NULL) {
--line;
break;
}
if (line >= allocated) {
// Double our allocation and re-allocate
allocated = allocated * 2;
list = (char **) realloc(list, sizeof(char*) * allocated);
}
list[line] = malloc(strlen(buffer));
strcpy(list[line], buffer);
int j;
// Remove endline
for (j = strlen(list[line]) - 1; j >= 0 && (list[line][j] == '\n' || list[line][j] == '\r'); j--)
;
list[line][j + 1] = '\0';
++line;
}
fclose(fp);
printf("Get package name from config:\n");
for(i = 0; i <= line; i++)
printf("%s\n", list[i]);
printf("\n");
FILE *p = popen("while true;do logcat -b events -v raw -s am_proc_start;sleep 1;done", "r");
while(!feof(p)) {
//Format of am_proc_start is (as of Android 5.1 and 6.0)
//UserID, pid, unix uid, processName, hostingType, hostingName
fgets(buffer, sizeof(buffer), p);
{
char *pos = buffer;
while(1) {
pos = strchr(pos, ',');
if(pos == NULL)
break;
pos[0] = ' ';
}
}
int user, pid, uid;
char processName[256], hostingType[16], hostingName[256];
int ret = sscanf(buffer, "[%d %d %d %256s %16s %256s]",
&user, &pid, &uid,
processName, hostingType, hostingName);
if(ret != 6) {
continue;
}
for (i = 0; i <= line; ++i) {
if(strstr(processName, list[i]) != NULL) {
printf("Disabling for process = %s, PID = %d, UID = %d\n", processName, pid, uid);
hideMagisk(pid);
}
}
}
pclose(p);
for (; line >= 0; line--)
free(list[line]);
free(list);
return 0;
}