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+/*
+ * Copyright (c) 1994 , Julianne Frances Haugh
+ * Copyright (c) 1996 - 2000, Marek Michałkiewicz
+ * Copyright (c) 2001 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2011, Nicolas François
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <pwd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <getopt.h>
+#include "defines.h"
+#include "prototypes.h"
+/*@-exitarg@*/
+#include "exitcodes.h"
+
+/* Global variables */
+const char *Prog;
+static bool cflg = false;
+
+/* local function prototypes */
+static RETSIGTYPE catch_signals (unused int sig);
+static /*@noreturn@*/void usage (int status);
+static void process_flags (int argc, char **argv);
+
+/*
+ * catch_signals - signal catcher
+ */
+static RETSIGTYPE catch_signals (unused int sig)
+{
+ _exit (10);
+}
+
+/*
+ * usage - print syntax message and exit
+ */
+static /*@noreturn@*/void usage (int status)
+{
+ FILE *usageout = (E_SUCCESS != status) ? stderr : stdout;
+ (void) fprintf (usageout,
+ _("Usage: %s [options]\n"
+ "\n"
+ "Options:\n"),
+ Prog);
+ (void) fputs (_(" -c, --check check the user's password expiration\n"), usageout);
+ (void) fputs (_(" -f, --force force password change if the user's password\n"
+ " is expired\n"), usageout);
+ (void) fputs (_(" -h, --help display this help message and exit\n"), usageout);
+ (void) fputs ("\n", usageout);
+ exit (status);
+}
+
+/*
+ * process_flags - parse the command line options
+ *
+ * It will not return if an error is encountered.
+ */
+static void process_flags (int argc, char **argv)
+{
+ bool fflg = false;
+ int c;
+ static struct option long_options[] = {
+ {"check", no_argument, NULL, 'c'},
+ {"force", no_argument, NULL, 'f'},
+ {"help", no_argument, NULL, 'h'},
+ {NULL, 0, NULL, '\0'}
+ };
+
+ while ((c = getopt_long (argc, argv, "cfh",
+ long_options, NULL)) != -1) {
+ switch (c) {
+ case 'c':
+ cflg = true;
+ break;
+ case 'f':
+ fflg = true;
+ break;
+ case 'h':
+ usage (E_SUCCESS);
+ /*@notreached@*/break;
+ default:
+ usage (E_USAGE);
+ }
+ }
+
+ if (! (cflg || fflg)) {
+ usage (E_USAGE);
+ }
+
+ if (cflg && fflg) {
+ fprintf (stderr,
+ _("%s: options %s and %s conflict\n"),
+ Prog, "-c", "-f");
+ usage (E_USAGE);
+ }
+
+ if (argc != optind) {
+ fprintf (stderr,
+ _("%s: unexpected argument: %s\n"),
+ Prog, argv[optind]);
+ usage (E_USAGE);
+ }
+}
+
+/*
+ * expiry - check and enforce password expiration policy
+ *
+ * expiry checks (-c) the current password expiration and forces (-f)
+ * changes when required. It is callable as a normal user command.
+ */
+int main (int argc, char **argv)
+{
+ struct passwd *pwd;
+ struct spwd *spwd;
+
+ Prog = Basename (argv[0]);
+
+ sanitize_env ();
+
+ /*
+ * Start by disabling all of the keyboard signals.
+ */
+ (void) signal (SIGHUP, catch_signals);
+ (void) signal (SIGINT, catch_signals);
+ (void) signal (SIGQUIT, catch_signals);
+#ifdef SIGTSTP
+ (void) signal (SIGTSTP, catch_signals);
+#endif
+
+ /*
+ * expiry takes one of two arguments. The default action is to give
+ * the usage message.
+ */
+ (void) setlocale (LC_ALL, "");
+ (void) bindtextdomain (PACKAGE, LOCALEDIR);
+ (void) textdomain (PACKAGE);
+
+ OPENLOG ("expiry");
+
+ process_flags (argc, argv);
+
+ /*
+ * Get user entries for /etc/passwd and /etc/shadow
+ */
+ pwd = get_my_pwent ();
+ if (NULL == pwd) {
+ fprintf (stderr, _("%s: Cannot determine your user name.\n"),
+ Prog);
+ SYSLOG ((LOG_WARN, "Cannot determine the user name of the caller (UID %lu)",
+ (unsigned long) getuid ()));
+ exit (10);
+ }
+ spwd = getspnam (pwd->pw_name); /* !USE_PAM, No need for xgetspnam */
+
+ /*
+ * If checking accounts, use agecheck() function.
+ */
+ if (cflg) {
+ /*
+ * Print out number of days until expiration.
+ */
+ agecheck (spwd);
+
+ /*
+ * Exit with status indicating state of account.
+ */
+ exit (isexpired (pwd, spwd));
+ }
+
+ /*
+ * Otherwise, force a password change with the expire() function.
+ * It will force the change or give a message indicating what to
+ * do.
+ * It won't return unless the account is unexpired.
+ */
+ (void) expire (pwd, spwd);
+
+ return E_SUCCESS;
+}
+