overby.me
this repo has no description
1#include <stdio.h>
2#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h>
5#include <errno.h>
6
7extern int lkm_call(int nr, ...);
8extern int __darling_vchroot(int dfd);
9
10int main(int argc, const char** argv)
11{
12 if (argc < 3)
13 {
14 fprintf(stderr, "vchroot <dir> <binary> [args...]\n");
15 return 1;
16 }
17
18 char buf[4096];
19 sprintf(buf, "%s%s", argv[1], argv[2]);
20
21 if (access(buf, F_OK) != 0)
22 {
23 fprintf(stderr, "Target executable not found: %s\n", buf);
24 return 5;
25 }
26
27 int dfd = open(argv[1], O_RDONLY | O_DIRECTORY);
28 if (dfd == -1)
29 {
30 perror("open");
31 return 1;
32 }
33
34 if (fchdir(dfd) == -1)
35 {
36 perror("fchdir");
37 return 2;
38 }
39
40 if (__darling_vchroot(dfd) < 0)
41 {
42 perror("vchroot");
43 return 3;
44 }
45
46 close(dfd);
47
48 // This is only needed for this binary and shouldn't be passed down
49 unsetenv("DYLD_ROOT_PATH");
50
51 // printf("Will execv %s\n", argv[2]);
52 execv(argv[2], (char * const *) argv+2);
53 perror("execv");
54
55 return 4;
56}
57