zfs-mkhomedir

#!/bin/sh
# Copyright 2017 Jørn Åne <@jornane.no>
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
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# this list of conditions and the following disclaimer in the documentation and/or
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# 3. Neither the name of the copyright holder nor the names of its contributors
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#
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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zfsparent="$1"
user="$2"

set -e

if test -z "$zfsparent" -o -z "$user"
then
	echo usage: $0 zfsparent user >&2
	cat >&2 <<EOF
Configuration for Samba
=======================
[homes]
root preexec = /bin/sh -c "/usr/local/libexec/zfs-mkhomedir zroot/home/FYRKAT %U"
# Configuration for PAM
=======================
# session
session required pam_exec.so /bin/sh -c "/usr/local/libexec/zfs-mkhomedir zroot/home/FYRKAT $PAM_USER"
EOF
	exit 2
fi

homedir="$(getent passwd "$user" | cut -d: -f6)"
group="$(getent passwd "$user" | cut -d: -f4)"
zfs="$zfsparent/$user"
test -d "$homedir" && exit 0
zfs list "$zfsparent" >/dev/null || exit 1
zfs list "$zfs" >/dev/null 2>&1 && exit 0 || true

zfs create "$zfs"
zfs allow -u "$user" diff,hold,release,send,snapdir "$zfs"

ls /usr/share/skel | while read file
do
	source="/usr/share/skel/$file"
	target="$homedir/$(echo "$file" | sed -e 's/^dot\././')"
	cp -a "$source" "$target"
done
chown -R "$user:$group" "$homedir"