github/Magisk
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Make hidesu hide Magisk and read config file

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This commit is contained in:
topjohnwu 2016-10-06 02:17:21 +08:00
parent 6bff6e9cff
commit aa2eed2c38
2 changed files with 58 additions and 11 deletions
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1
.gitignore vendored
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@ -1,2 +1,3 @@
obj
libs
*.zip

68
jni/hidesu.c
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@ -16,10 +16,13 @@ typedef unsigned short int sa_family_t;
#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 disableSu(int pid) {
int hideMagisk(int pid) {
char *path = NULL;
asprintf(&path, "/proc/%d/ns/mnt", pid);
int fd = open(path, O_RDONLY);
@ -29,24 +32,61 @@ int disableSu(int pid) {
int res = syscall(SYS_setns, fd, 0);
if(res == -1) return 3;
//XXX: What to mount to /sbin...?
res = mount("/system", "/sbin", "bind", MS_BIND, "");
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
char buffer[512];
int size = fgets(buffer, sizeof(buffer), p);
fgets(buffer, sizeof(buffer), p);
{
char *pos = buffer;
while(1) {
pos = index(pos, ',');
pos = strchr(pos, ',');
if(pos == NULL)
break;
pos[0] = ' ';
@ -61,15 +101,21 @@ int main(int argc, char **argv, char **envp) {
if(ret != 6) {
printf("sscanf returned %d on '%s'\n", ret, buffer);
continue;
}
#define GMS_PROC "com.google.android.gms.unstable"
if(strcmp(processName, GMS_PROC) == 0) {
printf("Disabling for PID = %d, UID = %d\n", pid, uid);
disableSu(pid);
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;
}