usr.bin/skeyinfo/skeyinfo.c

   1 /*      $NetBSD: skeyinfo.c,v 1.6 2009/09/05 06:13:34 dholland Exp $    */
   2
   3 /*-
   4  * Copyright (c) 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Andrew Brown.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __RCSID("$NetBSD: skeyinfo.c,v 1.6 2009/09/05 06:13:34 dholland Exp $");
  35 #endif
  36
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <pwd.h>
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <unistd.h>
  43
  44 #include <skey.h> /* requires stdio.h */
  45
  46 int
  47 main(int argc, char *argv[])
  48 {
  49         struct skey     skey;
  50         char            name[100], prompt[1024];
  51         int             uid;
  52         struct passwd  *pw = NULL;
  53
  54         argc--;
  55         argv++;
  56
  57         if (geteuid())
  58                 errx(1, "Must be root to read /etc/skeykeys");
  59
  60         uid = getuid();
  61
  62         if (!argc)
  63                 pw = getpwuid(uid);
  64         else if (!uid)
  65                 pw = getpwnam(argv[0]);
  66         else {
  67                 errno = EPERM;
  68                 err(1, "%s", argv[0]);
  69         }
  70
  71         if (!pw) {
  72                 if (argc)
  73                         errx(1, "%s: no such user", argv[0]);
  74                 else
  75                         errx(1, "Who are you?");
  76         }
  77
  78         (void) strlcpy(name, pw->pw_name, sizeof(name));
  79
  80         if (getskeyprompt(&skey, name, prompt) == -1) {
  81                 printf("%s %s no s/key\n",
  82                        argc ? name : "You",
  83                        argc ? "has" : "have");
  84         }
  85         else {
  86                 if (argc)
  87                         printf("%s's ", pw->pw_name);
  88                 else
  89                         printf("Your ");
  90                 printf("next %s", prompt);
  91         }
  92         return 0;
  93 }