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diff --git a/modules/pam_unix/pam_unix_acct.c b/modules/pam_unix/pam_unix_acct.c
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+/*
+ * Copyright Elliot Lee, 1996. All rights reserved.
+ * Copyright Jan Rêkorajski, 1999. 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, and the entire permission notice in its entirety,
+ * including the disclaimer of warranties.
+ * 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 author may not be used to endorse or promote
+ * products derived from this software without specific prior
+ * written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions. (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <syslog.h>
+#include <pwd.h>
+#include <shadow.h>
+#include <time.h> /* for time() */
+#include <errno.h>
+#include <sys/wait.h>
+
+#include <security/_pam_macros.h>
+
+/* indicate that the following groups are defined */
+
+#define PAM_SM_ACCOUNT
+
+#include <security/pam_modules.h>
+#include <security/pam_ext.h>
+#include <security/pam_modutil.h>
+
+#include "support.h"
+#include "passverify.h"
+
+int _unix_run_verify_binary(pam_handle_t *pamh, unsigned int ctrl,
+ const char *user, int *daysleft)
+{
+ int retval=0, child, fds[2];
+ void (*sighandler)(int) = NULL;
+ D(("running verify_binary"));
+
+ /* create a pipe for the messages */
+ if (pipe(fds) != 0) {
+ D(("could not make pipe"));
+ pam_syslog(pamh, LOG_ERR, "Could not make pipe: %m");
+ return PAM_AUTH_ERR;
+ }
+ D(("called."));
+
+ if (off(UNIX_NOREAP, ctrl)) {
+ /*
+ * This code arranges that the demise of the child does not cause
+ * the application to receive a signal it is not expecting - which
+ * may kill the application or worse.
+ *
+ * The "noreap" module argument is provided so that the admin can
+ * override this behavior.
+ */
+ sighandler = signal(SIGCHLD, SIG_DFL);
+ }
+
+ /* fork */
+ child = fork();
+ if (child == 0) {
+ size_t i=0;
+ struct rlimit rlim;
+ static char *envp[] = { NULL };
+ char *args[] = { NULL, NULL, NULL, NULL };
+
+ close(0); close(1);
+ /* reopen stdin as pipe */
+ close(fds[0]);
+ dup2(fds[1], STDOUT_FILENO);
+
+ /* XXX - should really tidy up PAM here too */
+
+ if (getrlimit(RLIMIT_NOFILE,&rlim)==0) {
+ for (i=2; i < rlim.rlim_max; i++) {
+ if ((unsigned int)fds[1] != i) {
+ close(i);
+ }
+ }
+ }
+
+ if (geteuid() == 0) {
+ /* must set the real uid to 0 so the helper will not error
+ out if pam is called from setuid binary (su, sudo...) */
+ setuid(0);
+ }
+
+ /* exec binary helper */
+ args[0] = x_strdup(CHKPWD_HELPER);
+ args[1] = x_strdup(user);
+ args[2] = x_strdup("chkexpiry");
+
+ execve(CHKPWD_HELPER, args, envp);
+
+ pam_syslog(pamh, LOG_ERR, "helper binary execve failed: %m");
+ /* should not get here: exit with error */
+ close (fds[1]);
+ D(("helper binary is not available"));
+ printf("-1\n");
+ exit(PAM_AUTHINFO_UNAVAIL);
+ } else {
+ close(fds[1]);
+ if (child > 0) {
+ char buf[32];
+ int rc=0;
+ rc=waitpid(child, &retval, 0); /* wait for helper to complete */
+ if (rc<0) {
+ pam_syslog(pamh, LOG_ERR, "unix_chkpwd waitpid returned %d: %m", rc);
+ retval = PAM_AUTH_ERR;
+ } else {
+ retval = WEXITSTATUS(retval);
+ rc = pam_modutil_read(fds[0], buf, sizeof(buf) - 1);
+ if(rc > 0) {
+ buf[rc] = '\0';
+ if (sscanf(buf,"%d", daysleft) != 1 )
+ retval = PAM_AUTH_ERR;
+ }
+ else {
+ pam_syslog(pamh, LOG_ERR, "read unix_chkpwd output error %d: %m", rc);
+ retval = PAM_AUTH_ERR;
+ }
+ }
+ } else {
+ pam_syslog(pamh, LOG_ERR, "Fork failed: %m");
+ D(("fork failed"));
+ retval = PAM_AUTH_ERR;
+ }
+ close(fds[0]);
+ }
+ if (sighandler != SIG_ERR) {
+ (void) signal(SIGCHLD, sighandler); /* restore old signal handler */
+ }
+ D(("Returning %d",retval));
+ return retval;
+}
+
+/*
+ * PAM framework looks for this entry-point to pass control to the
+ * account management module.
+ */
+
+PAM_EXTERN int pam_sm_acct_mgmt(pam_handle_t * pamh, int flags,
+ int argc, const char **argv)
+{
+ unsigned int ctrl;
+ const void *void_uname;
+ const char *uname;
+ int retval, daysleft;
+ struct spwd *spent;
+ struct passwd *pwent;
+ char buf[256];
+
+ D(("called."));
+
+ ctrl = _set_ctrl(pamh, flags, NULL, NULL, argc, argv);
+
+ retval = pam_get_item(pamh, PAM_USER, &void_uname);
+ uname = void_uname;
+ D(("user = `%s'", uname));
+ if (retval != PAM_SUCCESS || uname == NULL) {
+ pam_syslog(pamh, LOG_ALERT,
+ "could not identify user (from uid=%lu)",
+ (unsigned long int)getuid());
+ return PAM_USER_UNKNOWN;
+ }
+
+ retval = get_account_info(pamh, uname, &pwent, &spent);
+ if (retval == PAM_USER_UNKNOWN) {
+ pam_syslog(pamh, LOG_ALERT,
+ "could not identify user (from getpwnam(%s))",
+ uname);
+ return retval;
+ }
+
+ if (retval == PAM_SUCCESS && spent == NULL)
+ return PAM_SUCCESS;
+
+ if (retval == PAM_UNIX_RUN_HELPER) {
+ retval = _unix_run_verify_binary(pamh, ctrl, uname, &daysleft);
+ if (retval == PAM_AUTHINFO_UNAVAIL &&
+ on(UNIX_BROKEN_SHADOW, ctrl))
+ return PAM_SUCCESS;
+ } else if (retval != PAM_SUCCESS) {
+ if (on(UNIX_BROKEN_SHADOW,ctrl))
+ return PAM_SUCCESS;
+ else
+ return retval;
+ } else
+ retval = check_shadow_expiry(pamh, spent, &daysleft);
+
+ switch (retval) {
+ case PAM_ACCT_EXPIRED:
+ pam_syslog(pamh, LOG_NOTICE,
+ "account %s has expired (account expired)",
+ uname);
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ _("Your account has expired; please contact your system administrator"));
+ break;
+ case PAM_NEW_AUTHTOK_REQD:
+ if (daysleft == 0) {
+ pam_syslog(pamh, LOG_NOTICE,
+ "expired password for user %s (root enforced)",
+ uname);
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ _("You are required to change your password immediately (root enforced)"));
+ } else {
+ pam_syslog(pamh, LOG_DEBUG,
+ "expired password for user %s (password aged)",
+ uname);
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ _("You are required to change your password immediately (password aged)"));
+ }
+ break;
+ case PAM_AUTHTOK_EXPIRED:
+ pam_syslog(pamh, LOG_NOTICE,
+ "account %s has expired (failed to change password)",
+ uname);
+ _make_remark(pamh, ctrl, PAM_ERROR_MSG,
+ _("Your account has expired; please contact your system administrator"));
+ break;
+ case PAM_SUCCESS:
+ if (daysleft >= 0) {
+ pam_syslog(pamh, LOG_DEBUG,
+ "password for user %s will expire in %d days",
+ uname, daysleft);
+#if defined HAVE_DNGETTEXT && defined ENABLE_NLS
+ snprintf (buf, sizeof (buf),
+ dngettext(PACKAGE,
+ "Warning: your password will expire in %d day",
+ "Warning: your password will expire in %d days",
+ daysleft),
+ daysleft);
+#else
+ if (daysleft == 1)
+ snprintf(buf, sizeof (buf),
+ _("Warning: your password will expire in %d day"),
+ daysleft);
+ else
+ snprintf(buf, sizeof (buf),
+ /* TRANSLATORS: only used if dngettext is not supported */
+ _("Warning: your password will expire in %d days"),
+ daysleft);
+#endif
+ _make_remark(pamh, ctrl, PAM_TEXT_INFO, buf);
+ }
+ }
+
+ D(("all done"));
+
+ return retval;
+}
+
+
+/* static module data */
+#ifdef PAM_STATIC
+struct pam_module _pam_unix_acct_modstruct = {
+ "pam_unix_acct",
+ NULL,
+ NULL,
+ pam_sm_acct_mgmt,
+ NULL,
+ NULL,
+ NULL,
+};
+#endif