initialize homedirs in namespace init script

diff -up Linux-PAM-0.99.8.1/modules/pam_namespace/namespace.init.homedir Linux-PAM-0.99.8.1/modules/pam_namespace/namespace.init
--- Linux-PAM-0.99.8.1/modules/pam_namespace/namespace.init.homedir	2007-08-24 10:40:46.000000000 +0200
+++ Linux-PAM-0.99.8.1/modules/pam_namespace/namespace.init	2007-08-24 15:33:52.000000000 +0200
@@ -1,7 +1,24 @@
 #!/bin/sh -p
-# This is only a boilerplate for the instance initialization script.
-# It receives polydir path as $1 and the instance path as $2.
+# It receives polydir path as $1, the instance path as $2, 
+# a flag whether the instance dir was newly created (0 - no, 1 - yes) in $3,
+# and user name in $4.
 #
+# The following section will copy the contents of /etc/skel if this is a
+# newly created home directory.
+if [ "$3" = 1 ]; then
+        user="$4"
+        passwd=$(getent passwd "$user")
+        homedir=$(echo "$passwd" | cut -f6 -d":")
+        if [ "$1" = "$homedir" ]; then
+                gid=$(echo "$passwd" | cut -f4 -d":")
+                cp -aT /etc/skel "$homedir"
+                [ -x /sbin/restorecon ] && /sbin/restorecon -R "$homedir"
+                chown -R "$user":"$gid" "$homedir"
+                mode=$(awk '/^UMASK/{gsub("#.*$", "", $2); printf "%o", and(0777,compl(strtonum("0" $2))); exit}' /etc/login.defs)
+                chmod ${mode:-700} "$homedir"
+        fi
+fi
+#
 # If you intend to polyinstantiate /tmp and you also want to use the X windows
 # environment, you will have to use this script to bind mount the socket that
 # is used by the X server to communicate with its clients. X server places
diff -up Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.c.ns-init Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.c
--- Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.c.ns-init	2007-08-06 13:57:56.000000000 +0200
+++ Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.c	2007-08-06 14:06:52.000000000 +0200
@@ -672,7 +672,7 @@ static int poly_name(const struct polydi
 	    hash = NULL;
         } else {
     	    char *newname;
-    	    if (asprintf(&newname, "%.*s_%s", NAMESPACE_MAX_DIR_LEN-1-strlen(hash),
+    	    if (asprintf(&newname, "%.*s_%s", NAMESPACE_MAX_DIR_LEN-1-(int)strlen(hash),
     		*i_name, hash) < 0) {
     		goto fail;
     	    }
@@ -756,7 +756,7 @@ static int check_inst_parent(char *ipath
 * directory as arguments.
 */
 static int inst_init(const struct polydir_s *polyptr, const char *ipath,
-	   struct instance_data *idata)
+	   struct instance_data *idata, int newdir)
 {
 	pid_t rc, pid;
 	sighandler_t osighand = NULL;
@@ -786,7 +786,7 @@ static int inst_init(const struct polydi
 				}
 #endif
 				if (execl(NAMESPACE_INIT_SCRIPT, NAMESPACE_INIT_SCRIPT,
-							polyptr->dir, ipath, (char *)NULL) < 0)
+					polyptr->dir, ipath, newdir?"1":"0", idata->user, (char *)NULL) < 0)
 					exit(1);
 			} else if (pid > 0) {
 				while (((rc = waitpid(pid, &status, 0)) == (pid_t)-1) &&
@@ -831,6 +831,7 @@ static int create_dirs(struct polydir_s 
 {
 	struct stat statbuf, newstatbuf;
 	int rc, fd;
+	int newdir = 0;
 
     /*
      * stat the directory to polyinstantiate, so its owner-group-mode
@@ -884,6 +885,7 @@ static int create_dirs(struct polydir_s 
         }
     }
 
+    newdir = 1;
     /* Open a descriptor to it to prevent races */
     fd = open(ipath, O_DIRECTORY | O_RDONLY);
     if (fd < 0) {
@@ -948,7 +950,7 @@ static int create_dirs(struct polydir_s 
      */
 
 inst_init:
-	rc = inst_init(polyptr, ipath, idata);
+    rc = inst_init(polyptr, ipath, idata, newdir);
     return rc;
 }
 
@@ -981,7 +983,7 @@ static int ns_setup(struct polydir_s *po
             return PAM_SESSION_ERR;
 	}
 	/* we must call inst_init after the mount in this case */
-	return inst_init(polyptr, "tmpfs", idata);
+	return inst_init(polyptr, "tmpfs", idata, 1);
     }
 
     /*
diff -up Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.8.xml.ns-init Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.8.xml
--- Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.8.xml.ns-init	2007-06-18 12:46:47.000000000 +0200
+++ Linux-PAM-0.99.8.1/modules/pam_namespace/pam_namespace.8.xml	2007-08-06 13:57:56.000000000 +0200
@@ -60,7 +60,9 @@
       script <filename>/etc/security/namespace.init</filename> exists, it
       is used to initialize the namespace every time a new instance
       directory is setup. The script receives the polyinstantiated
-      directory path and the instance directory path as its arguments.
+      directory path, the instance directory path, flag whether the instance
+      directory was newly created (0 for no, 1 for yes), and the user name
+      as its arguments.
     </para>
 
     <para>