ref: e1907b41d32441e79e8cc3db26afc5f0c4cdcef9
dir: /sys/src/libauth/auth_getkey.c/
#include <u.h> #include <libc.h> #include <auth.h> int auth_getkey(char *params) { char *name; Dir *d; int pid; Waitmsg *w; /* start /factotum to query for a key */ name = "/factotum"; d = dirstat(name); if(d == nil){ name = "/boot/factotum"; d = dirstat(name); } if(d == nil){ werrstr("auth_getkey: no /factotum or /boot/factotum: didn't get key %s", params); return -1; } if(0) if(d->type != '/'){ werrstr("auth_getkey: /factotum may be bad: didn't get key %s", params); return -1; } switch(pid = fork()){ case -1: werrstr("can't fork for %s: %r", name); return -1; case 0: execl(name, "getkey", "-g", params, nil); exits(0); default: for(;;){ w = wait(); if(w == nil) break; if(w->pid == pid){ if(w->msg[0] != '\0'){ free(w); return -1; } free(w); return 0; } } } return 0; }