c7302b61ef
Files with no license use the default 3-clauses BSD license. The copyright were mostly not recorded; they were updated according to the Changelog. "Julianne Frances Haugh and contributors" changed to "copyright holders and contributors".
215 lines
6.2 KiB
C
215 lines
6.2 KiB
C
/*
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* Copyright (c) 1996 - 2000, Marek Michałkiewicz
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* Copyright (c) 2002 - 2006, Tomasz Kłoczko
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the copyright holders or contributors may not be used to
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* endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* pwconv - create or update /etc/shadow with information from
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* /etc/passwd.
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*
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* It is more like SysV pwconv, slightly different from the original Shadow
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* pwconv. Depends on "x" as password in /etc/passwd which means that the
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* password has already been moved to /etc/shadow. There is no need to move
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* /etc/npasswd to /etc/passwd, password files are updated using library
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* routines with proper locking.
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*
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* Can be used to update /etc/shadow after adding/deleting users by editing
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* /etc/passwd. There is no man page yet, but this program should be close
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* to pwconv(1M) on Solaris 2.x.
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*
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* Warning: make sure that all users have "x" as the password in /etc/passwd
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* before running this program for the first time on a system which already
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* has shadow passwords. Anything else (like "*" from old versions of the
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* shadow suite) will replace the user's encrypted password in /etc/shadow.
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*
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* Doesn't currently support pw_age information in /etc/passwd, and doesn't
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* support DBM files. Add it if you need it...
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*
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*/
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#include <config.h>
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#ident "$Id$"
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#include <errno.h>
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#include <fcntl.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "defines.h"
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#include "getdef.h"
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#include "prototypes.h"
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#include "pwio.h"
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#include "shadowio.h"
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#include "nscd.h"
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/*
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* exit status values
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*/
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#define E_SUCCESS 0 /* success */
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#define E_NOPERM 1 /* permission denied */
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#define E_USAGE 2 /* invalid command syntax */
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#define E_FAILURE 3 /* unexpected failure, nothing done */
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#define E_MISSING 4 /* unexpected failure, passwd file missing */
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#define E_PWDBUSY 5 /* passwd file(s) busy */
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#define E_BADENTRY 6 /* bad shadow entry */
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/*
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* Global variables
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*/
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static int
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shadow_locked = 0, passwd_locked = 0;
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/* local function prototypes */
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static void fail_exit (int);
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static void fail_exit (int status)
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{
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if (shadow_locked)
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spw_unlock ();
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if (passwd_locked)
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pw_unlock ();
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exit (status);
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}
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int main (int argc, char **argv)
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{
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const struct passwd *pw;
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struct passwd pwent;
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const struct spwd *sp;
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struct spwd spent;
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char *Prog = argv[0];
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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if (!pw_lock ()) {
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fprintf (stderr, _("%s: can't lock passwd file\n"), Prog);
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fail_exit (E_PWDBUSY);
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}
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passwd_locked++;
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if (!pw_open (O_RDWR)) {
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fprintf (stderr, _("%s: can't open passwd file\n"), Prog);
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fail_exit (E_MISSING);
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}
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if (!spw_lock ()) {
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fprintf (stderr, _("%s: can't lock shadow file\n"), Prog);
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fail_exit (E_PWDBUSY);
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}
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shadow_locked++;
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if (!spw_open (O_CREAT | O_RDWR)) {
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fprintf (stderr, _("%s: can't open shadow file\n"), Prog);
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fail_exit (E_FAILURE);
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}
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/*
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* Remove /etc/shadow entries for users not in /etc/passwd.
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*/
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spw_rewind ();
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while ((sp = spw_next ())) {
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if (pw_locate (sp->sp_namp))
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continue;
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if (!spw_remove (sp->sp_namp)) {
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/*
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* This shouldn't happen (the entry exists) but...
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*/
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fprintf (stderr,
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_
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("%s: can't remove shadow entry for %s\n"),
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Prog, sp->sp_namp);
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fail_exit (E_FAILURE);
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}
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}
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/*
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* Update shadow entries which don't have "x" as pw_passwd. Add any
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* missing shadow entries.
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*/
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pw_rewind ();
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while ((pw = pw_next ())) {
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sp = spw_locate (pw->pw_name);
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if (sp) {
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/* do we need to update this entry? */
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if (strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING) == 0)
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continue;
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/* update existing shadow entry */
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spent = *sp;
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} else {
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/* add new shadow entry */
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memset (&spent, 0, sizeof spent);
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spent.sp_namp = pw->pw_name;
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spent.sp_min = getdef_num ("PASS_MIN_DAYS", -1);
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spent.sp_max = getdef_num ("PASS_MAX_DAYS", -1);
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spent.sp_warn = getdef_num ("PASS_WARN_AGE", -1);
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spent.sp_inact = -1;
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spent.sp_expire = -1;
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spent.sp_flag = -1;
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}
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spent.sp_pwdp = pw->pw_passwd;
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spent.sp_lstchg = time ((time_t *) 0) / (24L * 3600L);
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if (!spw_update (&spent)) {
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fprintf (stderr,
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_
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("%s: can't update shadow entry for %s\n"),
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Prog, spent.sp_namp);
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fail_exit (E_FAILURE);
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}
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/* remove password from /etc/passwd */
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pwent = *pw;
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pwent.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
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if (!pw_update (&pwent)) {
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fprintf (stderr,
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_
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("%s: can't update passwd entry for %s\n"),
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Prog, pwent.pw_name);
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fail_exit (E_FAILURE);
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}
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}
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if (!spw_close ()) {
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fprintf (stderr, _("%s: can't update shadow file\n"), Prog);
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fail_exit (E_FAILURE);
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}
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if (!pw_close ()) {
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fprintf (stderr, _("%s: can't update passwd file\n"), Prog);
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fail_exit (E_FAILURE);
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}
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chmod (PASSWD_FILE "-", 0600); /* /etc/passwd- (backup file) */
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spw_unlock ();
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pw_unlock ();
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nscd_flush_cache ("passwd");
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exit (E_SUCCESS);
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}
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