crypto/dist/heimdal/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("$Heimdal: shadow.c 7464 1999-12-02 17:05:13Z joda $"
  37         "$NetBSD$");
  38
  39 #ifdef HAVE_SHADOW_H
  40
  41 #ifndef _PATH_CHPASS
  42 #define _PATH_CHPASS "/usr/bin/passwd"
  43 #endif
  44
  45 static int
  46 change_passwd(const struct passwd *who)
  47 {
  48     int status;
  49     pid_t pid;
  50
  51     switch (pid = fork()) {
  52     case -1:
  53         printf("fork /bin/passwd");
  54         exit(1);
  55     case 0:
  56         execlp(_PATH_CHPASS, "passwd", who->pw_name, (char *) 0);
  57         exit(1);
  58     default:
  59         waitpid(pid, &status, 0);
  60         return (status);
  61     }
  62 }
  63
  64 void
  65 check_shadow(const struct passwd *pw, const struct spwd *sp)
  66 {
  67   long today;
  68
  69   today = time(0)/(24L * 60 * 60);
  70
  71   if (sp == NULL)
  72       return;
  73
  74   if (sp->sp_expire > 0) {
  75         if (today >= sp->sp_expire) {
  76             printf("Your account has expired.\n");
  77             sleep(1);
  78             exit(0);
  79         } else if (sp->sp_expire - today < 14) {
  80             printf("Your account will expire in %d days.\n",
  81                    (int)(sp->sp_expire - today));
  82         }
  83   }
  84
  85   if (sp->sp_max > 0) {
  86         if (today >= (sp->sp_lstchg + sp->sp_max)) {
  87             printf("Your password has expired. Choose a new one.\n");
  88             change_passwd(pw);
  89         } else if (sp->sp_warn > 0
  90             && (today > (sp->sp_lstchg + sp->sp_max - sp->sp_warn))) {
  91             printf("Your password will expire in %d days.\n",
  92                    (int)(sp->sp_lstchg + sp->sp_max - today));
  93         }
  94   }
  95 }
  96 #endif /* HAVE_SHADOW_H */