xref: /freebsd-11-stable/tools/tools/nanobsd/Files/root/save_cfg

#!/bin/sh
#
# Copyright (c) 2006 Mathieu Arnold
# Copyright (c) 2010 Alex Bakhtin
# 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.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
#
# $FreeBSD: stable/11/tools/tools/nanobsd/Files/root/save_cfg 309884 2016-12-12 11:02:55Z brueffer $
#

set -e

trap "umount /cfg" 1 2 15 EXIT
mount /cfg
(
cd /etc
for filename in "$@" `find * -type f`
do
	if [ ! -f /cfg/$filename -a ! -f /cfg/.ignore/$filename ]
	then

		#
		# If file doesn't exist in /cfg and file is not in the 'ignore' list
		# then check if this file is exactly the same as original file
		# in nanobsd image
		#
		if ! cmp -s /etc/$filename /conf/base/etc/$filename 
		then
			file_path=`echo "$filename" | sed 's/\/[^/]*$//'`
			if [ $file_path != $filename ]
			then
				if [ ! -d /etc/$file_path ]
				then
					# should never go here unless we have some errors in
					# sed script extracting file path
					echo "Error: Path /etc/$file_path is not directory."
					exit 1;
				fi
			fi

			#
			# Ask user - how should we handle this file.
			# Add to cfg (y/n/i)?
			#	y) -> save this file in /cfg
			#	n) -> do not save this file in /cfg for current script invocation ONLY
			#	i) -> add file to ignore list (/cfg/.ignore hiereachy) and never save
			#	      try to add this file to /cfg.
			#
			# touch is used to add files to /cfg to keep the script flow straight and easy
			#
			read -p "New file /etc/$filename found. Add to /cfg (y/n/i)? " key
			case "$key" in
			[yY])
				if [ $file_path != $filename ]
				then
					mkdir -vp /cfg/$file_path
				fi
				touch /cfg/$filename && echo "File /etc/$filename added to /cfg."
				;;
			[iI])
				mkdir -vp /cfg/.ignore
				if [ $file_path != $filename ]
				then
					mkdir -vp /cfg/.ignore/$file_path
				fi
				touch /cfg/.ignore/$filename && echo "File /etc/$filename added to ignore list."
				;;
			esac
		fi
	fi
done

#
# Actually check all files in /cfg and save if necessary
#
cd /cfg
for filename in "$@" `find * -type f`
do
	if [ -f /etc/$filename ]
	then
        	cmp -s /etc/$filename /cfg/$filename || cp -pfv /etc/$filename /cfg/$filename
	else

		#
		# Give user an option to remove file from /cfg if this file is removed from /etc
		#
		read -p "File /cfg/$filename not found in /etc. Remove from /cfg (y/n)? " key
		case "$key" in
		[yY])
			rm /cfg/$filename && echo "File /cfg/$filename removed"
			;;
		esac
	fi
done

)
umount /cfg
trap 1 2 15 EXIT