#!/bin/sh # /usr/bin/wrap_editors # # Author: Alexander Kriegisch (user 'kriegaex' at ip-phone-forum.de) # # Generic editor wrapper script for "special" files in # - /var/flash (Fritz!Box config files in character devices) # - /var/tmp/flash and /var/mod/etc/conf (DS-Mod config files) # # This script replaces good old nvi/mvi as well as nmcedit and should work as # a replacement for any other n*/m* script as long as you create symbolic # links with the right names pointing to this script. Examples: # - /usr/bin/nvi -> wrap_editors # - /usr/bin/mnano -> wrap_editors # - /any/path/xfoo -> /usr/bin/wrap_editors # # It might be a good idea to stick to the old n*/m* naming scheme for the # symbolic links you create, but it is not technically necessary, because this # script uses the path of the file to be edited to decide whether is should # work in "/var/flash mode" or in "DS-Mod mode". The only important thing is # that the script discards the first character of the symbolic link name, i.e. # if the link is named "xfoo", the script tries to call an editor named "foo". # The target editor must be in the current PATH, so the script can find it # via "which foo". # Function for calling the target editor, handling the result and permitting # some user interaction. Parameters: # $1 - editor base name (NOT full path, otherwise we get problems with $tmp) # $2 - file to be edited (full or relative path) # # If you want to disable the "are you sure do you want to save" question, do # the following: # echo 0 > /tmp/flash/ask_save # modsave # To re-enable the question, call # rm -f /tmp/flash/ask_save # modsave edit_file() { local tmp="/var/$1.tmp" cat $2 > $tmp $1 $tmp local exitval=$? if [ $exitval -ne 0 ]; then rm -f $tmp echo "editor session aborted" >&2 exit $exitval fi local save="y" if [ "$(head -n1 /tmp/flash/ask_save 2>/dev/null)" != "0" ]; then echo -n "Are you sure you want to save the changes made? (y/n) " read -n 1 -s save echo fi if [ "$save" == "y" ]; then cat $tmp > $2 echo "done - file '$2' saved" exitval=0 else echo "aborted - file '$2' not saved" exitval=1 fi rm -f $tmp return $exitval } # Determine editor local editor_base=$(basename $0) if [ "$editor_base" == "wrap_editors" ]; then echo "error: don't call 'wrap_editors' directly, but via symlink" >&2 exit 1 fi editor_base=$(echo "$editor_base" | sed 's/^.//') local editor=$(which $editor_base) if [ ! -x "$editor" ]; then echo "error: editor '$editor_base' not found or not executable" >&2 exit 1 fi # Verify name of file to be edited if [ -z "$1" ] ; then echo "usage: $0 " >&2 exit 1 fi if [ ! -w "$1" ] ; then echo "error: file '$1' must exist and be writeable" >&2 exit 1 fi # Determine editing mode (TFFS file or DS-Mod config) local dir="$(dirname "$1")" local base="$(basename "$1")" case "$(realpath "$dir")/" in /var/flash/) edit_file $editor_base $1 ;; /var/tmp/flash/*) if edit_file $editor_base $1; then /usr/bin/modsave flash fi ;; /var/mod/etc/conf/*) local pkg="${base%.cfg}" local cfg="/mod/etc/default.$pkg/$pkg.cfg" if [ ! -r $cfg ]; then echo "error: file '$cfg' not found or not readable" >&2 exit 1 fi if edit_file $editor_base $1; then /usr/bin/modconf save $pkg /usr/bin/modsave flash fi ;; *) echo "error: use only with files in /var/flash, /var/mod/etc/conf or /var/tmp/flash" >&2 exit 1 ;; esac