shadow/libmisc/age.c

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/*
* 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.
*/
#include <config.h>
#include <sys/types.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include "prototypes.h"
#include "defines.h"
#include <pwd.h>
#include <grp.h>
#if defined(SHADOWPWD)
#include "rcsid.h"
RCSID ("$Id: age.c,v 1.9 2004/03/29 00:26:18 kloczek Exp $")
#ifndef PASSWD_PROGRAM
#define PASSWD_PROGRAM "/bin/passwd"
#endif
/*
* expire - force password change if password expired
*
* expire() calls /bin/passwd to change the user's password
* if it has expired.
*/
int expire (const struct passwd *pw, const struct spwd *sp)
{
int status;
int child;
int pid;
if (!sp)
sp = pwd_to_spwd (pw);
/*
* See if the user's password has expired, and if so
* force them to change their password.
*/
switch (status = isexpired (pw, sp)) {
case 0:
return 0;
case 1:
printf (_("Your password has expired."));
break;
case 2:
printf (_("Your password is inactive."));
break;
case 3:
printf (_("Your login has expired."));
break;
}
/*
* Setting the maximum valid period to less than the minimum
* valid period means that the minimum period will never
* occur while the password is valid, so the user can never
* change that password.
*/
if (status > 1 || sp->sp_max < sp->sp_min) {
puts (_(" Contact the system administrator.\n"));
exit (1);
}
puts (_(" Choose a new password.\n"));
fflush (stdout);
/*
* Close all the files so that unauthorized access won't
* occur. This needs to be done anyway because those files
* might become stale after "passwd" is executed.
*/
endspent ();
endpwent ();
#ifdef SHADOWGRP
endsgent ();
#endif
endgrent ();
/*
* Execute the /bin/passwd command. The exit status will be
* examined to see what the result is. If there are any
* errors the routine will exit. This forces the user to
* change their password before being able to use the account.
*/
if ((pid = fork ()) == 0) {
int err;
/*
* Set the UID to be that of the user. This causes
* passwd to work just like it would had they executed
* it from the command line while logged in.
*/
if (setup_uid_gid (pw, 0))
_exit (126);
execl (PASSWD_PROGRAM, PASSWD_PROGRAM, pw->pw_name,
(char *) 0);
err = errno;
perror ("Can't execute " PASSWD_PROGRAM);
_exit ((err == ENOENT) ? 127 : 126);
} else if (pid == -1) {
perror ("fork");
exit (1);
}
while ((child = wait (&status)) != pid && child != -1);
if (child == pid && status == 0)
return 1;
exit (1);
/*NOTREACHED*/}
/*
* agecheck - see if warning is needed for password expiration
*
* agecheck sees how many days until the user's password is going
* to expire and warns the user of the pending password expiration.
*/
void agecheck (const struct passwd *pw, const struct spwd *sp)
{
long now = time ((long *) 0) / SCALE;
long remain;
if (!sp)
sp = pwd_to_spwd (pw);
/*
* The last, max, and warn fields must be supported or the
* warning period cannot be calculated.
*/
if (sp->sp_lstchg == -1 || sp->sp_max == -1 || sp->sp_warn == -1)
return;
if ((remain = (sp->sp_lstchg + sp->sp_max) - now) <= sp->sp_warn) {
remain /= DAY / SCALE;
if (remain > 1)
printf (_
("Your password will expire in %ld days.\n"),
remain);
else if (remain == 1)
printf (_
("Your password will expire tomorrow.\n"));
else if (remain == 0)
printf (_("Your password will expire today.\n"));
}
}
#endif /* SHADOWPWD */