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/*
* SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
* SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
* SPDX-FileCopyrightText: 2001 - 2006, Tomasz Kłoczko
* SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <config.h>
#include <sys/types.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include "adds.h"
#include "defines.h"
#include "exitcodes.h"
#include "prototypes.h"
#ident "$Id$"
#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, /*@null@*/const struct spwd *sp)
{
int status;
pid_t child;
pid_t pid;
if (NULL == sp) {
return 0;
}
/*
* See if the user's password has expired, and if so
* force them to change their password.
*/
status = isexpired (pw, sp);
switch (status) {
case 0:
return 0;
case 1:
(void) fputs (_("Your password has expired."), stdout);
break;
case 2:
(void) fputs (_("Your password is inactive."), stdout);
break;
case 3:
(void) fputs (_("Your login has expired."), stdout);
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)) {
(void) puts (_(" Contact the system administrator."));
exit (EXIT_FAILURE);
}
(void) puts (_(" Choose a new password."));
(void) 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.
*/
pid = fork ();
if (0 == pid) {
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 defined(HAVE_INITGROUPS) && ! defined(USE_PAM)
if (setup_uid_gid (pw, false) != 0)
#else
if (setup_uid_gid (pw) != 0)
#endif
{
_exit (126);
}
(void) execl (PASSWD_PROGRAM, PASSWD_PROGRAM, pw->pw_name, (char *) NULL);
err = errno;
perror ("Can't execute " PASSWD_PROGRAM);
_exit ((ENOENT == err) ? E_CMD_NOTFOUND : E_CMD_NOEXEC);
} else if ((pid_t) -1 == pid) {
perror ("fork");
exit (EXIT_FAILURE);
}
while (((child = wait (&status)) != pid) && (child != (pid_t)-1));
if ((child == pid) && (0 == status)) {
return 1;
}
exit (EXIT_FAILURE);
/*@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 (/*@null@*/const struct spwd *sp)
{
long now = time(NULL) / DAY;
long remain;
if (NULL == sp) {
return;
}
/*
* The last, max, and warn fields must be supported or the
* warning period cannot be calculated.
*/
if ( (-1 == sp->sp_lstchg)
|| (-1 == sp->sp_max)
|| (-1 == sp->sp_warn)) {
return;
}
if (0 == sp->sp_lstchg) {
(void) puts (_("You must change your password."));
return;
}
remain = addsl(sp->sp_lstchg, sp->sp_max, -now);
if (remain <= sp->sp_warn) {
if (remain > 1) {
(void) printf (_("Your password will expire in %ld days.\n"),
remain);
} else if (1 == remain) {
(void) puts (_("Your password will expire tomorrow."));
} else if (remain == 0) {
(void) puts (_("Your password will expire today."));
}
}
}
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