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Magisk Hide: Unmount dummy skeleton

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This commit is contained in:
topjohnwu 2016-11-06 02:09:14 +08:00
parent da94c2e1e5
commit 0498540439
1 changed files with 17 additions and 12 deletions
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23
jni/magiskhide.c
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@ -56,8 +56,11 @@ 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;
if(setns(fd, 0) == -1) return 3;
if(fd == -1) return 2; // Maybe process died..
if(setns(fd, 0) == -1) {
fprintf(logfile, "Unable to change namespace for pid=%d\n", pid);
return 3;
}
free(path);
path = NULL;
@ -65,7 +68,7 @@ int hideMagisk(int pid) {
FILE *mount_fp = fopen(path, "r");
if (mount_fp == NULL) {
fprintf(logfile, "Error opening mount list!\n");
return 1;
return 4;
}
free(path);
@ -73,15 +76,17 @@ int hideMagisk(int pid) {
char **mount_list = file_to_str_arr(mount_fp, &mount_size), mountpoint[256], *sbstr;
fclose(mount_fp);
// Unmount in inverse order
for(i = mount_size - 1; i >= 0; --i) {
if (strstr(mount_list[i], "/dev/block/loop")) {
if (strstr(mount_list[i], "/dev/magisk")) continue;
// Everything from loop mount
sscanf(mount_list[i], "%256s %256s", mountpoint, mountpoint);
if (!strstr(mountpoint, "/dev/magisk/dummy"))
} else if (strstr(mount_list[i], "tmpfs /system/")) {
// Directly unmount skeletons
sscanf(mount_list[i], "%256s %256s", mountpoint, mountpoint);
} else continue;
lazy_unmount(mountpoint);
} else if ((sbstr = strstr(mount_list[i], "/dev/magisk/dummy"))) {
sscanf(sbstr, "/dev/magisk/dummy%256s", mountpoint);
lazy_unmount(mountpoint);
}
free(mount_list[i]);
}
// Free memory
@ -200,7 +205,7 @@ int main(int argc, char **argv, char **envp) {
hideMagisk(pid);
return 0;
}
wait(&i);
waitpid(forkpid, NULL, 0);
kill(forkpid, SIGTERM);
break;
}