fd970ab62c
* libmisc/Makefile.am, lib/prototypes.h, libmisc/yesno.c, src/grpck.c, src/pwck.c: move yes_or_no() from grpck/pwck to a separate libmisc/yesno.c (with a read_only argument). * libmisc/fields.c, libmisc/yesno.c: Make sure stdout is flushed before reading the user's answer.
574 lines
13 KiB
C
574 lines
13 KiB
C
/*
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* Copyright 1992 - 1994, Julianne Frances Haugh
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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. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#ident "$Id$"
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#include <fcntl.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include "chkname.h"
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#include "commonio.h"
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#include "defines.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 "getdef.h"
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#include "nscd.h"
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extern void __pw_del_entry (const struct commonio_entry *);
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extern struct commonio_entry *__pw_get_head (void);
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extern void __spw_del_entry (const struct commonio_entry *);
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extern struct commonio_entry *__spw_get_head (void);
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/*
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* Exit codes
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*/
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#define E_OKAY 0
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#define E_USAGE 1
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#define E_BADENTRY 2
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#define E_CANTOPEN 3
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#define E_CANTLOCK 4
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#define E_CANTUPDATE 5
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/*
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* Global variables
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*/
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static char *Prog;
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static const char *pwd_file = PASSWD_FILE;
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static const char *spw_file = SHADOW_FILE;
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static int read_only = 0;
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static int quiet = 0; /* don't report warnings, only errors */
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/* local function prototypes */
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static void usage (void);
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/*
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* usage - print syntax message and exit
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*/
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static void usage (void)
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{
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fprintf (stderr, _("Usage: %s [-q] [-r] [-s] [passwd [shadow]]\n"),
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Prog);
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exit (E_USAGE);
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}
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/*
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* pwck - verify password file integrity
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*/
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int main (int argc, char **argv)
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{
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int arg;
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int errors = 0;
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int changed = 0;
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struct commonio_entry *pfe, *tpfe;
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struct passwd *pwd;
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int sort_mode = 0;
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struct commonio_entry *spe, *tspe;
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struct spwd *spw;
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int is_shadow = 0;
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/*
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* Get my name so that I can use it to report errors.
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*/
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Prog = Basename (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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OPENLOG ("pwck");
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/*
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* Parse the command line arguments
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*/
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while ((arg = getopt (argc, argv, "eqrs")) != EOF) {
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switch (arg) {
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case 'e': /* added for Debian shadow-961025-2 compatibility */
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case 'q':
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quiet = 1;
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break;
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case 'r':
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read_only = 1;
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break;
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case 's':
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sort_mode = 1;
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break;
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default:
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usage ();
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}
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}
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if (sort_mode && read_only) {
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fprintf (stderr, _("%s: -s and -r are incompatibile\n"), Prog);
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exit (E_USAGE);
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}
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/*
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* Make certain we have the right number of arguments
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*/
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if (optind != argc && optind + 1 != argc && optind + 2 != argc)
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usage ();
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/*
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* If there are two left over filenames, use those as the password
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* and shadow password filenames.
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*/
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if (optind != argc) {
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pwd_file = argv[optind];
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pw_name (pwd_file);
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}
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if (optind + 2 == argc) {
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spw_file = argv[optind + 1];
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spw_name (spw_file);
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is_shadow = 1;
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} else if (optind == argc)
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is_shadow = spw_file_present ();
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/*
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* Lock the files if we aren't in "read-only" mode
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*/
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if (!read_only) {
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if (!pw_lock ()) {
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fprintf (stderr, _("%s: cannot lock file %s\n"),
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Prog, pwd_file);
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if (optind == argc)
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SYSLOG ((LOG_WARN, "cannot lock %s", pwd_file));
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closelog ();
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exit (E_CANTLOCK);
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}
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if (is_shadow && !spw_lock ()) {
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fprintf (stderr, _("%s: cannot lock file %s\n"),
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Prog, spw_file);
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if (optind == argc)
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SYSLOG ((LOG_WARN, "cannot lock %s", spw_file));
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closelog ();
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exit (E_CANTLOCK);
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}
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}
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/*
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* Open the files. Use O_RDONLY if we are in read_only mode, O_RDWR
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* otherwise.
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*/
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if (!pw_open (read_only ? O_RDONLY : O_RDWR)) {
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fprintf (stderr, _("%s: cannot open file %s\n"),
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Prog, pwd_file);
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if (optind == argc)
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SYSLOG ((LOG_WARN, "cannot open %s", pwd_file));
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closelog ();
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exit (E_CANTOPEN);
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}
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if (is_shadow && !spw_open (read_only ? O_RDONLY : O_RDWR)) {
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fprintf (stderr, _("%s: cannot open file %s\n"),
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Prog, spw_file);
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if (optind == argc)
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SYSLOG ((LOG_WARN, "cannot open %s", spw_file));
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closelog ();
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exit (E_CANTOPEN);
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}
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if (sort_mode) {
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pw_sort ();
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if (is_shadow)
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spw_sort ();
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goto write_and_bye;
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}
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/*
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* Loop through the entire password file.
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*/
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for (pfe = __pw_get_head (); pfe; pfe = pfe->next) {
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/*
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* If this is a NIS line, skip it. You can't "know" what NIS
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* is going to do without directly asking NIS ...
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*/
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if (pfe->line[0] == '+' || pfe->line[0] == '-')
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continue;
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/*
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* Start with the entries that are completely corrupt. They
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* have no (struct passwd) entry because they couldn't be
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* parsed properly.
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*/
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if (!pfe->eptr) {
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/*
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* Tell the user this entire line is bogus and ask
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* them to delete it.
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*/
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printf (_("invalid password file entry\n"));
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printf (_("delete line '%s'? "), pfe->line);
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errors++;
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/*
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* prompt the user to delete the entry or not
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*/
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if (!yes_or_no (read_only))
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continue;
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/*
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* All password file deletions wind up here. This
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* code removes the current entry from the linked
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* list. When done, it skips back to the top of the
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* loop to try out the next list element.
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*/
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delete_pw:
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SYSLOG ((LOG_INFO, "delete passwd line `%s'",
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pfe->line));
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changed++;
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__pw_del_entry (pfe);
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continue;
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}
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/*
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* Password structure is good, start using it.
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*/
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pwd = pfe->eptr;
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/*
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* Make sure this entry has a unique name.
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*/
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for (tpfe = __pw_get_head (); tpfe; tpfe = tpfe->next) {
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const struct passwd *ent = tpfe->eptr;
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/*
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* Don't check this entry
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*/
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if (tpfe == pfe)
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continue;
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/*
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* Don't check invalid entries.
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*/
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if (!ent)
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continue;
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if (strcmp (pwd->pw_name, ent->pw_name) != 0)
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continue;
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/*
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* Tell the user this entry is a duplicate of
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* another and ask them to delete it.
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*/
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printf (_("duplicate password entry\n"));
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printf (_("delete line '%s'? "), pfe->line);
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errors++;
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/*
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* prompt the user to delete the entry or not
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*/
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if (yes_or_no (read_only))
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goto delete_pw;
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}
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/*
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* Check for invalid usernames. --marekm
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*/
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if (!check_user_name (pwd->pw_name)) {
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printf (_("invalid user name '%s'\n"), pwd->pw_name);
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errors++;
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}
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/*
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* Make sure the primary group exists
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*/
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/* local, no need for xgetgrgid */
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if (!quiet && !getgrgid (pwd->pw_gid)) {
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/*
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* No primary group, just give a warning
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*/
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printf (_("user %s: no group %u\n"),
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pwd->pw_name, pwd->pw_gid);
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errors++;
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}
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/*
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* Make sure the home directory exists
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*/
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if (!quiet && access (pwd->pw_dir, F_OK)) {
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/*
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* Home directory doesn't exist, give a warning
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*/
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printf (_
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("user %s: directory %s does not exist\n"),
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pwd->pw_name, pwd->pw_dir);
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errors++;
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}
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/*
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* Make sure the login shell is executable
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*/
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if (!quiet && pwd->pw_shell[0]
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&& access (pwd->pw_shell, F_OK)) {
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/*
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* Login shell doesn't exist, give a warning
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*/
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printf (_("user %s: program %s does not exist\n"),
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pwd->pw_name, pwd->pw_shell);
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errors++;
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}
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/*
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* Make sure this entry exists in the /etc/gshadow file.
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*/
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if (is_shadow) {
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spw = (struct spwd *) spw_locate (pwd->pw_name);
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if (spw == NULL) {
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printf (_
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("no matching password file entry in %s\n"),
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spw_file);
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printf (_("add user '%s' in %s? "),
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pwd->pw_name, spw_file);
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errors++;
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if (yes_or_no (read_only)) {
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struct spwd sp;
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struct passwd pw;
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sp.sp_namp = pwd->pw_name;
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sp.sp_pwdp = pwd->pw_passwd;
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sp.sp_min =
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getdef_num ("PASS_MIN_DAYS", -1);
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sp.sp_max =
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getdef_num ("PASS_MAX_DAYS", -1);
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sp.sp_warn =
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getdef_num ("PASS_WARN_AGE", -1);
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sp.sp_inact = -1;
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sp.sp_expire = -1;
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sp.sp_flag = -1;
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sp.sp_lstchg =
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time ((time_t *) 0) / (24L * 3600L);
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changed++;
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if (!spw_update (&sp)) {
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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, sp.sp_namp);
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exit (E_CANTUPDATE);
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}
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/* remove password from /etc/passwd */
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pw = *pwd;
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pw.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
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if (!pw_update (&pw)) {
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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, pw.pw_name);
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exit (E_CANTUPDATE);
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}
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}
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}
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}
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}
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if (!is_shadow)
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goto shadow_done;
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/*
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* Loop through the entire shadow password file.
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*/
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for (spe = __spw_get_head (); spe; spe = spe->next) {
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/*
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* Do not treat lines which were missing in gshadow
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* and were added earlier.
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*/
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if (spe->line == NULL)
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continue;
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/*
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* If this is a NIS line, skip it. You can't "know" what NIS
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* is going to do without directly asking NIS ...
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*/
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if (spe->line[0] == '+' || spe->line[0] == '-')
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continue;
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/*
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* Start with the entries that are completely corrupt. They
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* have no (struct spwd) entry because they couldn't be
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* parsed properly.
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*/
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if (!spe->eptr) {
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/*
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* Tell the user this entire line is bogus and ask
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* them to delete it.
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*/
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printf (_("invalid shadow password file entry\n"));
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printf (_("delete line '%s'? "), spe->line);
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errors++;
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/*
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* prompt the user to delete the entry or not
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*/
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if (!yes_or_no (read_only))
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continue;
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/*
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* All shadow file deletions wind up here. This code
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* removes the current entry from the linked list.
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* When done, it skips back to the top of the loop
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* to try out the next list element.
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*/
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delete_spw:
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SYSLOG ((LOG_INFO, "delete shadow line `%s'",
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spe->line));
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changed++;
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__spw_del_entry (spe);
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continue;
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}
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/*
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* Shadow password structure is good, start using it.
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*/
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spw = spe->eptr;
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/*
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* Make sure this entry has a unique name.
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*/
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for (tspe = __spw_get_head (); tspe; tspe = tspe->next) {
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const struct spwd *ent = tspe->eptr;
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/*
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* Don't check this entry
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*/
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if (tspe == spe)
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continue;
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/*
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* Don't check invalid entries.
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*/
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if (!ent)
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continue;
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if (strcmp (spw->sp_namp, ent->sp_namp) != 0)
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continue;
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/*
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* Tell the user this entry is a duplicate of
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* another and ask them to delete it.
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*/
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printf (_("duplicate shadow password entry\n"));
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printf (_("delete line '%s'? "), spe->line);
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errors++;
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/*
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* prompt the user to delete the entry or not
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*/
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if (yes_or_no (read_only))
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goto delete_spw;
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}
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/*
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* Make sure this entry exists in the /etc/passwd
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* file.
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*/
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if (!pw_locate (spw->sp_namp)) {
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/*
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* Tell the user this entry has no matching
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* /etc/passwd entry and ask them to delete it.
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*/
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printf (_("no matching password file entry in %s\n"),
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pwd_file);
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printf (_("delete line '%s'? "), spe->line);
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errors++;
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/*
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* prompt the user to delete the entry or not
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*/
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if (yes_or_no (read_only))
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goto delete_spw;
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}
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/*
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* Warn if last password change in the future. --marekm
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*/
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if (!quiet && spw->sp_lstchg > time ((time_t *) 0) / SCALE) {
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printf (_
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("user %s: last password change in the future\n"),
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spw->sp_namp);
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errors++;
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}
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}
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shadow_done:
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/*
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* All done. If there were no change we can just abandon any
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* changes to the files.
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*/
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if (changed) {
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write_and_bye:
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if (!pw_close ()) {
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fprintf (stderr, _("%s: cannot update file %s\n"),
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Prog, pwd_file);
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SYSLOG ((LOG_WARN, "cannot update %s", pwd_file));
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closelog ();
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exit (E_CANTUPDATE);
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}
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if (is_shadow && !spw_close ()) {
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fprintf (stderr, _("%s: cannot update file %s\n"),
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Prog, spw_file);
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SYSLOG ((LOG_WARN, "cannot update %s", spw_file));
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closelog ();
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exit (E_CANTUPDATE);
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}
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}
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/*
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* Don't be anti-social - unlock the files when you're done.
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*/
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if (is_shadow)
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spw_unlock ();
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(void) pw_unlock ();
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nscd_flush_cache ("passwd");
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/*
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* Tell the user what we did and exit.
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*/
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if (errors)
|
|
printf (changed ?
|
|
_("%s: the files have been updated\n") :
|
|
_("%s: no changes\n"), Prog);
|
|
|
|
closelog ();
|
|
exit (errors ? E_BADENTRY : E_OKAY);
|
|
}
|