-#!/bin/sh
-# Filename: grml-bind
-# Purpose: Program to copy config files and mount them back for editing
-# Authors: grml-team (grml.org), (c) Michael Gebetsroither <gebi@grml.org>
-# Bug-Reports: see http://grml.org/bugs/
-# License: This file is licensed under the GPL v2.
-# Latest change: Thu Feb 10 06:25:01 CET 2005 [gebi]
-################################################################################
-
-
-###
-### __INCLUDES
-###
-. /etc/grml/sh-lib
-#. /etc/grml/sysexits-sh
-
-
-
-###
-### __VARIABLES
-###
-
-# real vars (script defaults)
-target_="/ramdisk/grml-bind"
-runsFromHd && target_="/tmp/grml-bind" # where to save the file
-file_ro_="" # secured input filename (source)
-target_path_="" #secured path to target + filename
-
-# command parameter vars
-verbose_=0
-remove_mapping_=0 # user wants to remove the mapping
-create_mapping=0 # user wants to create the mapping
-
-
-
-###
-### __FUNCTIONS
-###
-
-# print program usage
-function printUsage
-{
-cat << EOF
-Usage: "grml-bind" [OPTIONS] <file you want to edit>
-
-grml-bind is a program to prepare a file on a read-only fs for writing
-It copies the file to a ramdisk and mount --bind it back.
-Very usefull for knoppix-like distributions.
-
-OPTIONS:
- -c create the file-mapping
- -r remove the file-mapping
- -v verbose (show what is going on, v++)
- -h this help text
- () create the file-mapping
-
-EOF
-}
-
-
-# function to create the mapping
-function createMapping
-{
- isExistent "$file_ro_" die
- isNotExistent "$target_path_" die
-
- # --preserve=mode,ownership,timestamps can be a problem for normal user
- # but neverless mount --bind requires extended privilegs, so who cares?
- execute "cp -rL \"$file_ro_\" \"$target_\"" warn \
- "Problms copying data to ramdisk"
-
- # mount--bind the file from ramdisk back over the r/o file
- execute "mount --bind \"$target_path_\" \"$file_ro_\"" warn || \
- execute "rm -r \"$target_path_\"" die
-
- exit 0
-}
-
-
-# remove the mapping
-function removeMapping
-{
- isExistent "$target_path_" die \
- "You have not edited this file yet: \"$target_path_\""
-
- execute "umount \"$file_ro_\"" warn
- execute "rm -r \"$target_path_\"" die
-
- exit 0
-}
-
-
-###
-### __START
-###
-
-# parse commandline
-while getopts vrhc opt_ ; do
- case "$opt_" in
- r) remove_mapping_=1 ;;
- c) create_mapping=1 ;;
- h) printUsage; exit ;;
- v) let verbose_=$verbose_+1 ;;
- ?) printUsage; exit 64 ;;
- esac
-done
-shift $(($OPTIND - 1)) # set ARGV to the first not parsed commandline parameter
-setVerbose $verbose_
-
-
-###
-# Working part
-###
-
-setExitFunction "printUsage"
-# hmmm user has not given us a filename/path
-if [ -z "$1" ]; then
- die "you need to give me a file/path" 64
-fi
-
-# hmmm user gave us the wrong number of arguments
-if [ "$#" -ne 1 ]; then
- die "wrong number of arguments" 64
-fi
-resetExitFunction
-
-checkRoot die
-
-# does our target-path exist? if not create it
-if [ ! -d $target_ ]; then
- warn "target path \"$target_\" does not exist => creating"
- execute "mkdir -p $target_" die
- runsFromHd && execute "chmod 751 $target_" die
-fi
-
-# secure the input file/path
-file_ro_=`secureInput "$1"`
-
-# check if input file is a link, if yes resolve it
-if [ -L $file_ro_ ]; then
- file_ro_=`execute "readlink \"$file_ro_\""`
-fi
-
-#create all possible pathformats to absolut paths
-normalized_source_path_=`relToAbs "$file_ro_"`
-file_ro_=$normalized_source_path_
-target_path_=$target_/`execute "basename \"$normalized_source_path_\""`
-
-# do what the user wants, maybee *g*
-if [ $remove_mapping_ -eq 1 ]; then # ok, the user wants to remove his mapping
- removeMapping
-else # no, user wants to create the mapping
- createMapping
-fi
-
-# END OF FILE ################################################################################
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