From b345587c61dc7bd7f72c475f9e5d83107928739e Mon Sep 17 00:00:00 2001
From: Assar Westerlund <assar@sics.se>
Date: Wed, 4 Aug 1999 16:57:48 +0000
Subject: [PATCH] new file with functions for handling shadow passwords

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6709 ec53bebd-3082-4978-b11e-865c3cabbd6b
---
 appl/login/shadow.c | 97 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 appl/login/shadow.c

diff --git a/appl/login/shadow.c b/appl/login/shadow.c
new file mode 100644
index 000000000..32b3f58df
--- /dev/null
+++ b/appl/login/shadow.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 1997, 1998, 1999 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * 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. All advertising materials mentioning features or use of this software 
+ *    must display the following acknowledgement: 
+ *      This product includes software developed by Kungliga Tekniska 
+ *      Högskolan and its contributors. 
+ *
+ * 4. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 "login_locl.h"
+
+RCSID("$Id$");
+
+#ifdef HAVE_SHADOW_H
+
+#ifndef _PATH_CHPASS
+#define _PATH_CHPASS "/usr/bin/passwd"
+#endif
+
+static int
+change_passwd(struct passwd *who)
+{
+    int status;
+    pid_t pid;
+
+    switch (pid = fork()) {
+    case -1:
+        printf("fork /bin/passwd");
+        exit(1);
+    case 0:
+        execlp(_PATH_CHPASS, "passwd", who->pw_name, (char *) 0);
+        exit(1);
+    default:
+        waitpid(pid, &status, 0);
+        return (status);
+    }
+}
+
+void 
+check_shadow(struct passwd *pw, struct spwd *sp)
+{
+  long today;
+
+  today = time(0)/(24L * 60 * 60);
+  
+  if (sp->sp_expire > 0) {
+        if (today >= sp->sp_expire) {
+            printf("Your account has expired.\n");
+            sleep(1);
+            exit(0);
+        } else if (sp->sp_expire - today < 14) {
+            printf("Your account will expire in %d days.\n",
+                   (int)(sp->sp_expire - today));
+        }
+  }
+
+  if (sp->sp_max > 0) {
+        if (today >= (sp->sp_lstchg + sp->sp_max)) {
+            printf("Your password has expired. Choose a new one.\n");
+            change_passwd(pw);
+        } else if (sp->sp_warn > 0
+            && (today > (sp->sp_lstchg + sp->sp_max - sp->sp_warn))) {
+            printf("Your password will expire in %d days.\n",
+                   (int)(sp->sp_lstchg + sp->sp_max - today));
+        }
+  }
+}
+#endif /* HAVE_SHADOW_H */