sys/src/libauth/auth_getkey.c

   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         Dir *d;
  10         int pid;
  11         Waitmsg *w;
  12
  13         /* start /factotum to query for a key */
  14         name = "/factotum";
  15         d = dirstat(name);
  16         if(d == nil){
  17                 name = "/boot/factotum";
  18                 d = dirstat(name);
  19         }
  20         if(d == nil){
  21                 werrstr("auth_getkey: no /factotum or /boot/factotum: didn't get key %s", params);
  22                 return -1;
  23         }
  24 if(0)   if(d->type != '/'){
  25                 werrstr("auth_getkey: /factotum may be bad: didn't get key %s", params);
  26                 return -1;
  27         }
  28         switch(pid = fork()){
  29         case -1:
  30                 werrstr("can't fork for %s: %r", name);
  31                 return -1;
  32         case 0:
  33                 execl(name, "getkey", "-g", params, nil);
  34                 exits(0);
  35         default:
  36                 for(;;){
  37                         w = wait();
  38                         if(w == nil)
  39                                 break;
  40                         if(w->pid == pid){
  41                                 if(w->msg[0] != '\0'){
  42                                         free(w);
  43                                         return -1;
  44                                 }
  45                                 free(w);
  46                                 return 0;
  47                         }
  48                 }
  49         }
  50         return 0;
  51 }