mirror of
https://github.com/topjohnwu/Magisk.git
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77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
typedef unsigned short int sa_family_t;
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//Linux includes
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#define _LINUX_TIME_H
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#define _GNU_SOURCE
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#include <sys/types.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <linux/connector.h>
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#include <linux/cn_proc.h>
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#include <linux/netlink.h>
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#include <linux/fs.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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//WARNING: Calling this will change our current namespace
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//We don't care because we don't want to run from here anyway
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int disableSu(int pid) {
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char *path = NULL;
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asprintf(&path, "/proc/%d/ns/mnt", pid);
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int fd = open(path, O_RDONLY);
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if(fd == -1) exit(2);
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//TODO: Fix non arm platforms
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#define SYS_setns 375
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int res = syscall(SYS_setns, fd, 0);
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if(res == -1) exit(3);
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//XXX: What to mount to /sbin...?
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res = mount("/system", "/sbin", "bind", MS_BIND, "");
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if(res == -1) exit(4);
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return 0;
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}
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int main(int argc, char **argv, char **envp) {
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system("logcat -b events -c");
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FILE *p = popen("logcat -b events -v raw -s am_proc_start", "r");
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while(!feof(p)) {
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//Format of am_proc_start is (as of Android 5.1 and 6.0)
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//UserID, pid, unix uid, processName, hostingType, hostingName
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char buffer[512];
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int size = fgets(buffer, sizeof(buffer), p);
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{
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char *pos = buffer;
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while(1) {
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pos = index(pos, ',');
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if(pos == NULL)
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break;
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pos[0] = ' ';
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}
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}
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int user, pid, uid;
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char processName[256], hostingType[16], hostingName[256];
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int ret = sscanf(buffer, "[%d %d %d %256s %16s %256s]",
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&user, &pid, &uid,
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processName, hostingType, hostingName);
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if(ret != 6) {
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printf("sscanf returned %d on '%s'\n", ret, buffer);
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exit(1);
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}
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#define GMS_PROC "com.google.android.gms.unstable"
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if(strcmp(processName, GMS_PROC) == 0) {
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printf("Disabling for PID = %d, UID = %d\n", pid, uid);
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disableSu(pid);
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}
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}
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return 0;
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}
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