shadow/libmisc/isexpired.c

105 lines
3.3 KiB
C

/*
* Copyright 1989 - 1994, Julianne Frances Haugh
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Extracted from age.c and made part of libshadow.a - may be useful
* in other shadow-aware programs. --marekm
*/
#include <config.h>
#include <sys/types.h>
#include "prototypes.h"
#include "defines.h"
#include <pwd.h>
#include <time.h>
#ident "$Id$"
/*
* isexpired - determine if account is expired yet
*
* isexpired calculates the expiration date based on the
* password expiration criteria.
*/
/*ARGSUSED*/ int isexpired (const struct passwd *pw, const struct spwd *sp)
{
long now;
now = time ((time_t *) 0) / SCALE;
if (!sp)
sp = pwd_to_spwd (pw);
/*
* Quick and easy - there is an expired account field
* along with an inactive account field. Do the expired
* one first since it is worse.
*/
if (sp->sp_expire > 0 && now >= sp->sp_expire)
return 3;
/*
* Last changed date 1970-01-01 (not very likely) means that
* the password must be changed on next login (passwd -e).
*
* The check for "x" is a workaround for RedHat NYS libc bug -
* if /etc/shadow doesn't exist, getspnam() still succeeds and
* returns sp_lstchg==0 (must change password) instead of -1!
*/
if (sp->sp_lstchg == 0 && !strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING))
return 1;
if (sp->sp_lstchg > 0 && sp->sp_max >= 0 && sp->sp_inact >= 0 &&
now >= sp->sp_lstchg + sp->sp_max + sp->sp_inact)
return 2;
/*
* The last and max fields must be present for an account
* to have an expired password. A maximum of >10000 days
* is considered to be infinite.
*/
if (sp->sp_lstchg == -1 ||
sp->sp_max == -1 || sp->sp_max >= (10000L * DAY / SCALE))
return 0;
/*
* Calculate today's day and the day on which the password
* is going to expire. If that date has already passed,
* the password has expired.
*/
if (now >= sp->sp_lstchg + sp->sp_max)
return 1;
return 0;
}