saving uncommitted changes in /etc prior to emerge run

security/._cfg0000_limits.conf

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+# /etc/security/limits.conf
+#
+#Each line describes a limit for a user in the form:
+#
+#<domain>        <type>  <item>  <value>
+#
+#Where:
+#<domain> can be:
+#        - a user name
+#        - a group name, with @group syntax
+#        - the wildcard *, for default entry
+#        - the wildcard %, can be also used with %group syntax,
+#                 for maxlogin limit
+#
+#<type> can have the two values:
+#        - "soft" for enforcing the soft limits
+#        - "hard" for enforcing hard limits
+#
+#<item> can be one of the following:
+#        - core - limits the core file size (KB)
+#        - data - max data size (KB)
+#        - fsize - maximum filesize (KB)
+#        - memlock - max locked-in-memory address space (KB)
+#        - nofile - max number of open file descriptors
+#        - rss - max resident set size (KB)
+#        - stack - max stack size (KB)
+#        - cpu - max CPU time (MIN)
+#        - nproc - max number of processes
+#        - as - address space limit (KB)
+#        - maxlogins - max number of logins for this user
+#        - maxsyslogins - max number of logins on the system
+#        - priority - the priority to run user process with
+#        - locks - max number of file locks the user can hold
+#        - sigpending - max number of pending signals
+#        - msgqueue - max memory used by POSIX message queues (bytes)
+#        - nice - max nice priority allowed to raise to values: [-20, 19]
+#        - rtprio - max realtime priority
+#
+#<domain>      <type>  <item>         <value>
+#
+
+#*               soft    core            0
+#*               hard    rss             10000
+#@student        hard    nproc           20
+#@faculty        soft    nproc           20
+#@faculty        hard    nproc           50
+#ftp             hard    nproc           0
+#@student        -       maxlogins       4
+
+# End of file

security/._cfg0000_namespace.init

@@ -0,0 +1,25 @@
+#!/bin/sh
+# 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
+        # This line will fix the labeling on all newly created directories
+        [ -x /sbin/restorecon ] && /sbin/restorecon "$1"
+        user="$4"
+        passwd=$(getent passwd "$user")
+        homedir=$(echo "$passwd" | cut -f6 -d":")
+        if [ "$1" = "$homedir" ]; then
+                gid=$(echo "$passwd" | cut -f4 -d":")
+                cp -rT /etc/skel "$homedir"
+                chown -R "$user":"$gid" "$homedir"
+                mask=$(awk '/^UMASK/{gsub("#.*$", "", $2); print $2; exit}' /etc/login.defs)
+                mode=$(printf "%o" $((0777 & ~$mask)))
+                chmod ${mode:-700} "$homedir"
+                [ -x /sbin/restorecon ] && /sbin/restorecon -R "$homedir"
+        fi
+fi
+
+exit 0