304b0ec202
expressed in a number of days since Jan 1, 1970. * src/chage.c: Likewise: lastday renamed to lstchgdate. Also fix the --lastday documentation.
941 lines
24 KiB
C
941 lines
24 KiB
C
/*
|
||
* Copyright (c) 1989 - 1994, Julianne Frances Haugh
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* Copyright (c) 1996 - 2000, Marek Michałkiewicz
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* Copyright (c) 2000 - 2006, Tomasz Kłoczko
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* Copyright (c) 2007 - 2009, Nicolas François
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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
|
||
* 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
|
||
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
* 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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#include <config.h>
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#ident "$Id$"
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#include <ctype.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <time.h>
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#ifdef ACCT_TOOLS_SETUID
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#ifdef USE_PAM
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#include "pam_defs.h"
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#endif /* USE_PAM */
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#endif /* ACCT_TOOLS_SETUID */
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#include <pwd.h>
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#ifdef WITH_SELINUX
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#include <selinux/selinux.h>
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#include <selinux/av_permissions.h>
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#endif
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#include "exitcodes.h"
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#include "prototypes.h"
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#include "defines.h"
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#include "pwio.h"
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#include "shadowio.h"
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/*
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* Global variables
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*/
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char *Prog;
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static bool
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dflg = false, /* set last password change date */
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Eflg = false, /* set account expiration date */
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Iflg = false, /* set password inactive after expiration */
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lflg = false, /* show account aging information */
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mflg = false, /* set minimum number of days before password change */
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Mflg = false, /* set maximum number of days before password change */
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Wflg = false; /* set expiration warning days */
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static bool amroot = false;
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static bool pw_locked = false; /* Indicate if the password file is locked */
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static bool spw_locked = false; /* Indicate if the shadow file is locked */
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/* The name and UID of the user being worked on */
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static char user_name[BUFSIZ] = "";
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static uid_t user_uid = -1;
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static long mindays;
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static long maxdays;
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static long lstchgdate;
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static long warndays;
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static long inactdays;
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static long expdate;
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#define EPOCH "1969-12-31"
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/* local function prototypes */
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static bool isnum (const char *s);
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static void usage (void);
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static void date_to_str (char *buf, size_t maxsize, time_t date);
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static int new_fields (void);
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static void print_date (time_t date);
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static void list_fields (void);
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static void process_flags (int argc, char **argv);
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static void check_flags (int argc, int opt_index);
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static void check_perms (void);
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static void open_files (bool readonly);
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static void close_files (void);
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static void fail_exit (int code);
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/*
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* fail_exit - do some cleanup and exit with the given error code
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*/
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static void fail_exit (int code)
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{
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if (spw_locked) {
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if (spw_unlock () == 0) {
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fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
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/* continue */
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}
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}
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if (pw_locked) {
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if (pw_unlock () == 0) {
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fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
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SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
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/* continue */
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}
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}
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closelog ();
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#ifdef WITH_AUDIT
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if (E_SUCCESS != code) {
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audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
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"change age",
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user_name, (unsigned int) user_uid, 0);
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}
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#endif
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exit (code);
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}
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/*
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* isnum - determine whether or not a string is a number
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*/
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static bool isnum (const char *s)
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{
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while ('\0' != *s) {
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if (!isdigit (*s)) {
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return false;
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}
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s++;
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}
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return true;
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}
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/*
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* usage - print command line syntax and exit
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*/
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static void usage (void)
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{
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fputs (_("Usage: chage [options] [LOGIN]\n"
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"\n"
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"Options:\n"
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" -d, --lastday LAST_DAY set date of last password change to LAST_DAY\n"
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" -E, --expiredate EXPIRE_DATE set account expiration date to EXPIRE_DATE\n"
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" -h, --help display this help message and exit\n"
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" -I, --inactive INACTIVE set password inactive after expiration\n"
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" to INACTIVE\n"
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" -l, --list show account aging information\n"
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" -m, --mindays MIN_DAYS set minimum number of days before password\n"
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" change to MIN_DAYS\n"
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" -M, --maxdays MAX_DAYS set maximim number of days before password\n"
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" change to MAX_DAYS\n"
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" -W, --warndays WARN_DAYS set expiration warning days to WARN_DAYS\n"
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"\n"), stderr);
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exit (E_USAGE);
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}
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static void date_to_str (char *buf, size_t maxsize, time_t date)
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{
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struct tm *tp;
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tp = gmtime (&date);
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#ifdef HAVE_STRFTIME
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(void) strftime (buf, maxsize, "%Y-%m-%d", tp);
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#else
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(void) snprintf (buf, maxsize, "%04d-%02d-%02d",
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tp->tm_year + 1900, tp->tm_mon + 1, tp->tm_mday);
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#endif /* HAVE_STRFTIME */
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}
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/*
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* new_fields - change the user's password aging information interactively.
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*
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* prompt the user for all of the password age values. set the fields
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* from the user's response, or leave alone if nothing was entered. The
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* value (-1) is used to indicate the field should be removed if possible.
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* any other negative value is an error. very large positive values will
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* be handled elsewhere.
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*/
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static int new_fields (void)
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{
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char buf[200];
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(void) puts (_("Enter the new value, or press ENTER for the default"));
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(void) puts ("");
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snprintf (buf, sizeof buf, "%ld", mindays);
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change_field (buf, sizeof buf, _("Minimum Password Age"));
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if ( (getlong (buf, &mindays) == 0)
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|| (mindays < -1)) {
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return 0;
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}
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snprintf (buf, sizeof buf, "%ld", maxdays);
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change_field (buf, sizeof buf, _("Maximum Password Age"));
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if ( (getlong (buf, &maxdays) == 0)
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|| (maxdays < -1)) {
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return 0;
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}
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date_to_str (buf, sizeof buf, lstchgdate * SCALE);
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change_field (buf, sizeof buf, _("Last Password Change (YYYY-MM-DD)"));
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if (strcmp (buf, EPOCH) == 0) {
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lstchgdate = -1;
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} else {
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lstchgdate = strtoday (buf);
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if (lstchgdate == -1) {
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return 0;
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}
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}
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snprintf (buf, sizeof buf, "%ld", warndays);
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change_field (buf, sizeof buf, _("Password Expiration Warning"));
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if ( (getlong (buf, &warndays) == 0)
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|| (warndays < -1)) {
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return 0;
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}
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snprintf (buf, sizeof buf, "%ld", inactdays);
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change_field (buf, sizeof buf, _("Password Inactive"));
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if ( (getlong (buf, &inactdays) == 0)
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|| (inactdays < -1)) {
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return 0;
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}
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date_to_str (buf, sizeof buf, expdate * SCALE);
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change_field (buf, sizeof buf,
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_("Account Expiration Date (YYYY-MM-DD)"));
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if (strcmp (buf, EPOCH) == 0) {
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expdate = -1;
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} else {
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expdate = strtoday (buf);
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if (expdate == -1) {
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return 0;
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}
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}
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return 1;
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}
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static void print_date (time_t date)
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{
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#ifdef HAVE_STRFTIME
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struct tm *tp;
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char buf[80];
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tp = gmtime (&date);
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if (NULL == tp) {
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(void) printf ("time_t: %lu\n", date);
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} else {
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(void) strftime (buf, sizeof buf, "%b %d, %Y", tp);
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(void) puts (buf);
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}
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#else
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struct tm *tp;
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char *cp = NULL;
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tp = gmtime (&date);
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if (NULL != tp) {
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cp = asctime (tp);
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}
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if (NULL != cp) {
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(void) printf ("%6.6s, %4.4s\n", cp + 4, cp + 20);
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} else {
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(void) printf ("time_t: %lu\n", date);
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}
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#endif
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}
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/*
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* list_fields - display the current values of the expiration fields
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*
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* display the password age information from the password fields. Date
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* values will be displayed as a calendar date, or the word "never" if
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* the date is 1/1/70, which is day number 0.
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*/
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static void list_fields (void)
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{
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long changed = 0;
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long expires;
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|
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/*
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* The "last change" date is either "never" or the date the password
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* was last modified. The date is the number of days since 1/1/1970.
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*/
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(void) fputs (_("Last password change\t\t\t\t\t: "), stdout);
|
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if (lstchgdate < 0) {
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(void) puts (_("never"));
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} else if (lstchgdate == 0) {
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(void) puts (_("password must be changed"));
|
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} else {
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changed = lstchgdate * SCALE;
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print_date ((time_t) changed);
|
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}
|
||
|
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/*
|
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* The password expiration date is determined from the last change
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* date plus the number of days the password is valid for.
|
||
*/
|
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(void) fputs (_("Password expires\t\t\t\t\t: "), stdout);
|
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if (lstchgdate == 0) {
|
||
(void) puts (_("password must be changed"));
|
||
} else if ( (lstchgdate < 0)
|
||
|| (maxdays >= (10000 * (DAY / SCALE)))
|
||
|| (maxdays < 0)) {
|
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(void) puts (_("never"));
|
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} else {
|
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expires = changed + maxdays * SCALE;
|
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print_date ((time_t) expires);
|
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}
|
||
|
||
/*
|
||
* The account becomes inactive if the password is expired for more
|
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* than "inactdays". The expiration date is calculated and the
|
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* number of inactive days is added. The resulting date is when the
|
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* active will be disabled.
|
||
*/
|
||
(void) fputs (_("Password inactive\t\t\t\t\t: "), stdout);
|
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if (lstchgdate == 0) {
|
||
(void) puts (_("password must be changed"));
|
||
} else if ( (lstchgdate < 0)
|
||
|| (inactdays < 0)
|
||
|| (maxdays >= (10000 * (DAY / SCALE)))
|
||
|| (maxdays < 0)) {
|
||
(void) puts (_("never"));
|
||
} else {
|
||
expires = changed + (maxdays + inactdays) * SCALE;
|
||
print_date ((time_t) expires);
|
||
}
|
||
|
||
/*
|
||
* The account will expire on the given date regardless of the
|
||
* password expiring or not.
|
||
*/
|
||
(void) fputs (_("Account expires\t\t\t\t\t\t: "), stdout);
|
||
if (expdate < 0) {
|
||
(void) puts (_("never"));
|
||
} else {
|
||
expires = expdate * SCALE;
|
||
print_date ((time_t) expires);
|
||
}
|
||
|
||
/*
|
||
* Start with the easy numbers - the number of days before the
|
||
* password can be changed, the number of days after which the
|
||
* password must be chaged, the number of days before the password
|
||
* expires that the user is told, and the number of days after the
|
||
* password expires that the account becomes unusable.
|
||
*/
|
||
printf (_("Minimum number of days between password change\t\t: %ld\n"),
|
||
mindays);
|
||
printf (_("Maximum number of days between password change\t\t: %ld\n"),
|
||
maxdays);
|
||
printf (_("Number of days of warning before password expires\t: %ld\n"),
|
||
warndays);
|
||
}
|
||
|
||
/*
|
||
* process_flags - parse the command line options
|
||
*
|
||
* It will not return if an error is encountered.
|
||
*/
|
||
static void process_flags (int argc, char **argv)
|
||
{
|
||
/*
|
||
* Parse the command line options.
|
||
*/
|
||
int option_index = 0;
|
||
int c;
|
||
static struct option long_options[] = {
|
||
{"lastday", required_argument, NULL, 'd'},
|
||
{"expiredate", required_argument, NULL, 'E'},
|
||
{"help", no_argument, NULL, 'h'},
|
||
{"inactive", required_argument, NULL, 'I'},
|
||
{"list", no_argument, NULL, 'l'},
|
||
{"mindays", required_argument, NULL, 'm'},
|
||
{"maxdays", required_argument, NULL, 'M'},
|
||
{"warndays", required_argument, NULL, 'W'},
|
||
{NULL, 0, NULL, '\0'}
|
||
};
|
||
|
||
while ((c =
|
||
getopt_long (argc, argv, "d:E:hI:lm:M:W:", long_options,
|
||
&option_index)) != -1) {
|
||
switch (c) {
|
||
case 'd':
|
||
dflg = true;
|
||
if (!isnum (optarg)) {
|
||
lstchgdate = strtoday (optarg);
|
||
} else if ( (getlong (optarg, &lstchgdate) == 0)
|
||
|| (lstchgdate < -1)) {
|
||
fprintf (stderr,
|
||
_("%s: invalid date '%s'\n"),
|
||
Prog, optarg);
|
||
usage ();
|
||
}
|
||
break;
|
||
case 'E':
|
||
Eflg = true;
|
||
if (!isnum (optarg)) {
|
||
expdate = strtoday (optarg);
|
||
} else if ( (getlong (optarg, &expdate) == 0)
|
||
|| (expdate < -1)) {
|
||
fprintf (stderr,
|
||
_("%s: invalid date '%s'\n"),
|
||
Prog, optarg);
|
||
usage ();
|
||
}
|
||
break;
|
||
case 'h':
|
||
usage ();
|
||
break;
|
||
case 'I':
|
||
Iflg = true;
|
||
if ( (getlong (optarg, &inactdays) == 0)
|
||
|| (inactdays < -1)) {
|
||
fprintf (stderr,
|
||
_("%s: invalid numeric argument '%s'\n"),
|
||
Prog, optarg);
|
||
usage ();
|
||
}
|
||
break;
|
||
case 'l':
|
||
lflg = true;
|
||
break;
|
||
case 'm':
|
||
mflg = true;
|
||
if ( (getlong (optarg, &mindays) == 0)
|
||
|| (mindays < -1)) {
|
||
fprintf (stderr,
|
||
_("%s: invalid numeric argument '%s'\n"),
|
||
Prog, optarg);
|
||
usage ();
|
||
}
|
||
break;
|
||
case 'M':
|
||
Mflg = true;
|
||
if ( (getlong (optarg, &maxdays) == 0)
|
||
|| (maxdays < -1)) {
|
||
fprintf (stderr,
|
||
_("%s: invalid numeric argument '%s'\n"),
|
||
Prog, optarg);
|
||
usage ();
|
||
}
|
||
break;
|
||
case 'W':
|
||
Wflg = true;
|
||
if ( (getlong (optarg, &warndays) == 0)
|
||
|| (warndays < -1)) {
|
||
fprintf (stderr,
|
||
_("%s: invalid numeric argument '%s'\n"),
|
||
Prog, optarg);
|
||
usage ();
|
||
}
|
||
break;
|
||
default:
|
||
usage ();
|
||
}
|
||
}
|
||
|
||
check_flags (argc, optind);
|
||
}
|
||
|
||
/*
|
||
* check_flags - check flags and parameters consistency
|
||
*
|
||
* It will not return if an error is encountered.
|
||
*/
|
||
static void check_flags (int argc, int opt_index)
|
||
{
|
||
/*
|
||
* Make certain the flags do not conflict and that there is a user
|
||
* name on the command line.
|
||
*/
|
||
|
||
if (argc != opt_index + 1) {
|
||
usage ();
|
||
}
|
||
|
||
if (lflg && (mflg || Mflg || dflg || Wflg || Iflg || Eflg)) {
|
||
fprintf (stderr,
|
||
_("%s: do not include \"l\" with other flags\n"),
|
||
Prog);
|
||
usage ();
|
||
}
|
||
}
|
||
|
||
/*
|
||
* check_perms - check if the caller is allowed to add a group
|
||
*
|
||
* Non-root users are only allowed to display their aging information.
|
||
* (we will later make sure that the user is only listing her aging
|
||
* information)
|
||
*
|
||
* With PAM support, the setuid bit can be set on chage to allow
|
||
* non-root users to groups.
|
||
* Without PAM support, only users who can write in the group databases
|
||
* can add groups.
|
||
*
|
||
* It will not return if the user is not allowed.
|
||
*/
|
||
static void check_perms (void)
|
||
{
|
||
#ifdef ACCT_TOOLS_SETUID
|
||
#ifdef USE_PAM
|
||
pam_handle_t *pamh = NULL;
|
||
struct passwd *pampw;
|
||
int retval;
|
||
#endif /* USE_PAM */
|
||
#endif /* ACCT_TOOLS_SETUID */
|
||
|
||
/*
|
||
* An unprivileged user can ask for their own aging information, but
|
||
* only root can change it, or list another user's aging
|
||
* information.
|
||
*/
|
||
|
||
if (!amroot && !lflg) {
|
||
fprintf (stderr, _("%s: Permission denied.\n"), Prog);
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
|
||
#ifdef ACCT_TOOLS_SETUID
|
||
#ifdef USE_PAM
|
||
pampw = getpwuid (getuid ()); /* local, no need for xgetpwuid */
|
||
if (NULL == pampw) {
|
||
fprintf (stderr,
|
||
_("%s: Cannot determine your user name.\n"),
|
||
Prog);
|
||
exit (E_NOPERM);
|
||
}
|
||
|
||
retval = pam_start ("chage", pampw->pw_name, &conv, &pamh);
|
||
|
||
if (PAM_SUCCESS == retval) {
|
||
retval = pam_authenticate (pamh, 0);
|
||
}
|
||
|
||
if (PAM_SUCCESS == retval) {
|
||
retval = pam_acct_mgmt (pamh, 0);
|
||
}
|
||
|
||
if (NULL != pamh) {
|
||
(void) pam_end (pamh, retval);
|
||
}
|
||
if (PAM_SUCCESS != retval) {
|
||
fprintf (stderr, _("%s: PAM authentication failed\n"), Prog);
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
#endif /* USE_PAM */
|
||
#endif /* ACCT_TOOLS_SETUID */
|
||
}
|
||
|
||
/*
|
||
* open_files - open the shadow database
|
||
*
|
||
* In read-only mode, the databases are not locked and are opened
|
||
* only for reading.
|
||
*/
|
||
static void open_files (bool readonly)
|
||
{
|
||
/*
|
||
* Lock and open the password file. This loads all of the password
|
||
* file entries into memory. Then we get a pointer to the password
|
||
* file entry for the requested user.
|
||
*/
|
||
if (!readonly) {
|
||
if (pw_lock () == 0) {
|
||
fprintf (stderr,
|
||
_("%s: cannot lock %s; try again later.\n"),
|
||
Prog, pw_dbname ());
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
pw_locked = true;
|
||
}
|
||
if (pw_open (readonly ? O_RDONLY: O_RDWR) == 0) {
|
||
fprintf (stderr, _("%s: cannot open %s\n"), Prog, pw_dbname ());
|
||
SYSLOG ((LOG_WARN, "cannot open %s", pw_dbname ()));
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
|
||
/*
|
||
* For shadow password files we have to lock the file and read in
|
||
* the entries as was done for the password file. The user entries
|
||
* does not have to exist in this case; a new entry will be created
|
||
* for this user if one does not exist already.
|
||
*/
|
||
if (!readonly) {
|
||
if (spw_lock () == 0) {
|
||
fprintf (stderr,
|
||
_("%s: cannot lock %s; try again later.\n"),
|
||
Prog, spw_dbname ());
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
spw_locked = true;
|
||
}
|
||
if (spw_open (readonly ? O_RDONLY: O_RDWR) == 0) {
|
||
fprintf (stderr,
|
||
_("%s: cannot open %s\n"), Prog, spw_dbname ());
|
||
SYSLOG ((LOG_WARN, "cannot open %s", spw_dbname ()));
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* close_files - close and unlock the password/shadow databases
|
||
*/
|
||
static void close_files (void)
|
||
{
|
||
/*
|
||
* Now close the shadow password file, which will cause all of the
|
||
* entries to be re-written.
|
||
*/
|
||
if (spw_close () == 0) {
|
||
fprintf (stderr,
|
||
_("%s: failure while writing changes to %s\n"), Prog, spw_dbname ());
|
||
SYSLOG ((LOG_ERR, "failure while writing changes to %s", spw_dbname ()));
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
|
||
/*
|
||
* Close the password file. If any entries were modified, the file
|
||
* will be re-written.
|
||
*/
|
||
if (pw_close () == 0) {
|
||
fprintf (stderr, _("%s: failure while writing changes to %s\n"), Prog, pw_dbname ());
|
||
SYSLOG ((LOG_ERR, "failure while writing changes to %s", pw_dbname ()));
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
if (spw_unlock () == 0) {
|
||
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, spw_dbname ());
|
||
SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
|
||
/* continue */
|
||
}
|
||
spw_locked = false;
|
||
if (pw_unlock () == 0) {
|
||
fprintf (stderr, _("%s: failed to unlock %s\n"), Prog, pw_dbname ());
|
||
SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
|
||
/* continue */
|
||
}
|
||
pw_locked = false;
|
||
}
|
||
|
||
/*
|
||
* update_age - update the aging information in the database
|
||
*
|
||
* It will not return in case of error
|
||
*/
|
||
static void update_age (const struct spwd *sp, const struct passwd *pw)
|
||
{
|
||
struct spwd spwent;
|
||
|
||
/*
|
||
* There was no shadow entry. The new entry will have the encrypted
|
||
* password transferred from the normal password file along with the
|
||
* aging information.
|
||
*/
|
||
if (NULL == sp) {
|
||
struct passwd pwent = *pw;
|
||
|
||
memzero (&spwent, sizeof spwent);
|
||
spwent.sp_namp = xstrdup (pw->pw_name);
|
||
spwent.sp_pwdp = xstrdup (pw->pw_passwd);
|
||
spwent.sp_flag = SHADOW_SP_FLAG_UNSET;
|
||
|
||
pwent.pw_passwd = SHADOW_PASSWD_STRING; /* XXX warning: const */
|
||
if (pw_update (&pwent) == 0) {
|
||
fprintf (stderr,
|
||
_("%s: failed to prepare the new %s entry '%s'\n"), Prog, pw_dbname (), pwent.pw_name);
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
} else {
|
||
spwent.sp_namp = xstrdup (sp->sp_namp);
|
||
spwent.sp_pwdp = xstrdup (sp->sp_pwdp);
|
||
spwent.sp_flag = sp->sp_flag;
|
||
}
|
||
|
||
/*
|
||
* Copy the fields back to the shadow file entry and write the
|
||
* modified entry back to the shadow file. Closing the shadow and
|
||
* password files will commit any changes that have been made.
|
||
*/
|
||
spwent.sp_max = maxdays;
|
||
spwent.sp_min = mindays;
|
||
spwent.sp_lstchg = lstchgdate;
|
||
spwent.sp_warn = warndays;
|
||
spwent.sp_inact = inactdays;
|
||
spwent.sp_expire = expdate;
|
||
|
||
if (spw_update (&spwent) == 0) {
|
||
fprintf (stderr,
|
||
_("%s: failed to prepare the new %s entry '%s'\n"), Prog, spw_dbname (), spwent.sp_namp);
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
|
||
}
|
||
|
||
/*
|
||
* get_defaults - get the value of the fields not set from the command line
|
||
*/
|
||
static void get_defaults (const struct spwd *sp)
|
||
{
|
||
/*
|
||
* Set the fields that aren't being set from the command line from
|
||
* the password file.
|
||
*/
|
||
if (NULL != sp) {
|
||
if (!Mflg) {
|
||
maxdays = sp->sp_max;
|
||
}
|
||
if (!mflg) {
|
||
mindays = sp->sp_min;
|
||
}
|
||
if (!dflg) {
|
||
lstchgdate = sp->sp_lstchg;
|
||
}
|
||
if (!Wflg) {
|
||
warndays = sp->sp_warn;
|
||
}
|
||
if (!Iflg) {
|
||
inactdays = sp->sp_inact;
|
||
}
|
||
if (!Eflg) {
|
||
expdate = sp->sp_expire;
|
||
}
|
||
} else {
|
||
/*
|
||
* Use default values that will not change the behavior of the
|
||
* account.
|
||
*/
|
||
if (!Mflg) {
|
||
maxdays = -1;
|
||
}
|
||
if (!mflg) {
|
||
mindays = -1;
|
||
}
|
||
if (!dflg) {
|
||
lstchgdate = -1;
|
||
}
|
||
if (!Wflg) {
|
||
warndays = -1;
|
||
}
|
||
if (!Iflg) {
|
||
inactdays = -1;
|
||
}
|
||
if (!Eflg) {
|
||
expdate = -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* chage - change a user's password aging information
|
||
*
|
||
* This command controls the password aging information.
|
||
*
|
||
* The valid options are
|
||
*
|
||
* -d set last password change date (*)
|
||
* -E set account expiration date (*)
|
||
* -I set password inactive after expiration (*)
|
||
* -l show account aging information
|
||
* -M set maximim number of days before password change (*)
|
||
* -m set minimum number of days before password change (*)
|
||
* -W set expiration warning days (*)
|
||
*
|
||
* (*) requires root permission to execute.
|
||
*
|
||
* All of the time fields are entered in the internal format which is
|
||
* either seconds or days.
|
||
*/
|
||
|
||
int main (int argc, char **argv)
|
||
{
|
||
const struct spwd *sp;
|
||
uid_t ruid;
|
||
gid_t rgid;
|
||
const struct passwd *pw;
|
||
|
||
#ifdef WITH_AUDIT
|
||
audit_help_open ();
|
||
#endif
|
||
sanitize_env ();
|
||
(void) setlocale (LC_ALL, "");
|
||
(void) bindtextdomain (PACKAGE, LOCALEDIR);
|
||
(void) textdomain (PACKAGE);
|
||
|
||
ruid = getuid ();
|
||
rgid = getgid ();
|
||
amroot = (ruid == 0);
|
||
#ifdef WITH_SELINUX
|
||
if (amroot && (is_selinux_enabled () > 0)) {
|
||
amroot = (selinux_check_passwd_access (PASSWD__ROOTOK) == 0);
|
||
}
|
||
#endif
|
||
|
||
/*
|
||
* Get the program name so that error messages can use it.
|
||
*/
|
||
Prog = Basename (argv[0]);
|
||
|
||
process_flags (argc, argv);
|
||
|
||
OPENLOG ("chage");
|
||
|
||
check_perms ();
|
||
|
||
if (!spw_file_present ()) {
|
||
fprintf (stderr,
|
||
_("%s: the shadow password file is not present\n"),
|
||
Prog);
|
||
SYSLOG ((LOG_WARN, "can't find the shadow password file"));
|
||
closelog ();
|
||
exit (E_SHADOW_NOTFOUND);
|
||
}
|
||
|
||
open_files (lflg);
|
||
/* Drop privileges */
|
||
if (lflg && ( (setregid (rgid, rgid) != 0)
|
||
|| (setreuid (ruid, ruid) != 0))) {
|
||
fprintf (stderr, _("%s: failed to drop privileges (%s)\n"),
|
||
Prog, strerror (errno));
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
|
||
pw = pw_locate (argv[optind]);
|
||
if (NULL == pw) {
|
||
fprintf (stderr, _("%s: user '%s' does not exist in %s\n"),
|
||
Prog, argv[optind], pw_dbname ());
|
||
closelog ();
|
||
exit (E_NOPERM);
|
||
}
|
||
|
||
STRFCPY (user_name, pw->pw_name);
|
||
user_uid = pw->pw_uid;
|
||
|
||
sp = spw_locate (argv[optind]);
|
||
get_defaults(sp);
|
||
|
||
/*
|
||
* Print out the expiration fields if the user has requested the
|
||
* list option.
|
||
*/
|
||
if (lflg) {
|
||
if (!amroot && (ruid != user_uid)) {
|
||
fprintf (stderr, _("%s: Permission denied.\n"), Prog);
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
#ifdef WITH_AUDIT
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"display aging info",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
#endif
|
||
list_fields ();
|
||
fail_exit (E_SUCCESS);
|
||
}
|
||
|
||
/*
|
||
* If none of the fields were changed from the command line, let the
|
||
* user interactively change them.
|
||
*/
|
||
if (!mflg && !Mflg && !dflg && !Wflg && !Iflg && !Eflg) {
|
||
printf (_("Changing the aging information for %s\n"),
|
||
user_name);
|
||
if (new_fields () == 0) {
|
||
fprintf (stderr, _("%s: error changing fields\n"),
|
||
Prog);
|
||
fail_exit (E_NOPERM);
|
||
}
|
||
#ifdef WITH_AUDIT
|
||
else {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change all aging information",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
#endif
|
||
} else {
|
||
#ifdef WITH_AUDIT
|
||
if (Mflg) {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change max age",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
if (mflg) {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change min age",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
if (dflg) {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change last change date",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
if (Wflg) {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change passwd warning",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
if (Iflg) {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change inactive days",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
if (Eflg) {
|
||
audit_logger (AUDIT_USER_CHAUTHTOK, Prog,
|
||
"change passwd expiration",
|
||
user_name, (unsigned int) user_uid, 1);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
update_age (sp, pw);
|
||
|
||
close_files ();
|
||
|
||
SYSLOG ((LOG_INFO, "changed password expiry for %s", user_name));
|
||
|
||
closelog ();
|
||
exit (E_SUCCESS);
|
||
}
|
||
|