1 #include <u.h>
2 #include <libc.h>
3 #include <auth.h>
4 
5 int
6 auth_getkey(char *params)
7 {
8 	char *name;
9 	int pid;
10 	Waitmsg *w;
11 
12 	/* start /factotum to query for a key */
13 	name = unsharp("#9/bin/factotum");
14 	if(name == nil || access(name, AEXEC) < 0){
15 		werrstr("auth_getkey: no $PLAN9/bin/factotum: didn't get key %s", params);
16 		return -1;
17 	}
18 	switch(pid = fork()){
19 	case -1:
20 		werrstr("can't fork for %s: %r", name);
21 		return -1;
22 	case 0:
23 		execl(name, "getkey", "-g", params, nil);
24 		exits(0);
25 	default:
26 		free(name);
27 		for(;;){
28 			w = wait();
29 			if(w == nil)
30 				break;
31 			if(w->pid == pid){
32 				if(w->msg[0] != '\0'){
33 					free(w);
34 					return -1;
35 				}
36 				free(w);
37 				return 0;
38 			}
39 		}
40 	}
41 	return 0;
42 }