appl/login/shadow.c

   1 /*
   2  * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "login_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 #ifdef HAVE_SHADOW_H
  39
  40 #ifndef _PATH_CHPASS
  41 #define _PATH_CHPASS "/usr/bin/passwd"
  42 #endif
  43
  44 static int
  45 change_passwd(const struct passwd *who)
  46 {
  47     int status;
  48     pid_t pid;
  49
  50     switch (pid = fork()) {
  51     case -1:
  52         printf("fork /bin/passwd");
  53         exit(1);
  54     case 0:
  55         execlp(_PATH_CHPASS, "passwd", who->pw_name, (char *) 0);
  56         exit(1);
  57     default:
  58         waitpid(pid, &status, 0);
  59         return (status);
  60     }
  61 }
  62
  63 void
  64 check_shadow(const struct passwd *pw, const struct spwd *sp)
  65 {
  66   long today;
  67
  68   today = time(0)/(24L * 60 * 60);
  69
  70   if (sp == NULL)
  71       return;
  72
  73   if (sp->sp_expire > 0) {
  74         if (today >= sp->sp_expire) {
  75             printf("Your account has expired.\n");
  76             sleep(1);
  77             exit(0);
  78         } else if (sp->sp_expire - today < 14) {
  79             printf("Your account will expire in %d days.\n",
  80                    (int)(sp->sp_expire - today));
  81         }
  82   }
  83
  84   if (sp->sp_max > 0) {
  85         if (today >= (sp->sp_lstchg + sp->sp_max)) {
  86             printf("Your password has expired. Choose a new one.\n");
  87             change_passwd(pw);
  88         } else if (sp->sp_warn > 0
  89             && (today > (sp->sp_lstchg + sp->sp_max - sp->sp_warn))) {
  90             printf("Your password will expire in %d days.\n",
  91                    (int)(sp->sp_lstchg + sp->sp_max - today));
  92         }
  93   }
  94 }
  95 #endif /* HAVE_SHADOW_H */