+ }
+
+ ##############
+
+#hmmm: holy crowbars, this is an old one. do we ever still have any need of it?
+ # an unfortunately similarly named function to the above 'ps' as in process
+ # methods, but this 'ps' stands for postscript. this takes a postscript file
+ # and converts it into pcl3 printer language and then ships it to the printer.
+ # this mostly makes sense for an environment where one's default printer is
+ # pcl. if the input postscript causes ghostscript to bomb out, there has been
+ # some good success running ps2ps on the input file and using the cleaned
+ # postscript file for printing.
+ function ps2pcl2lpr() {
+ for $i in $*; do
+ gs -sDEVICE=pcl3 -sOutputFile=- -sPAPERSIZE=letter "$i" | lpr -l
+ done
+ }
+
+ function screen() {
+ save_terminal_title
+#hmmm: ugly absolute path here.
+ /usr/bin/screen $*
+ restore_terminal_title
+ }
+
+ # switches from a /X/path form to an X:/ form. this also processes cygwin paths.
+ function unix_to_dos_path() {
+ # we usually remove dos slashes in favor of forward slashes.
+ local DOSSYHOME
+ if [[ ! "$OS" =~ ^[Ww][iI][nN] ]]; then
+ # fake this value for non-windows (non-cygwin) platforms.
+ DOSSYHOME="$HOME"
+ else
+ # for cygwin, we must replace the /home/X path with an absolute one, since cygwin
+ # insists on the /home form instead of /c/cygwin/home being possible. this is
+ # super frustrating and nightmarish.
+ DOSSYHOME="$(cygpath -am "$HOME")"
+ fi
+
+ if [ ! -z "$SERIOUS_SLASH_TREATMENT" ]; then
+ # unless this flag is set, in which case we force dos slashes.
+ echo "$1" | sed -e "s?^$HOME?$DOSSYHOME?g" | sed -e 's/\\/\//g' | sed -e 's/\/cygdrive//' | sed -e 's/\/\([a-zA-Z]\)\/\(.*\)/\1:\/\2/' | sed -e 's/\//\\/g'
+ else
+ echo "$1" | sed -e "s?^$HOME?$DOSSYHOME?g" | sed -e 's/\\/\//g' | sed -e 's/\/cygdrive//' | sed -e 's/\/\([a-zA-Z]\)\/\(.*\)/\1:\/\2/'
+ fi
+ }
+
+# # switches from an X:/ form to a /cygdrive/X/path form. this is only useful
+# # for the cygwin environment currently.
+# function dos_to_unix_path() {
+# # we always remove dos slashes in favor of forward slashes.
+##old: echo "$1" | sed -e 's/\\/\//g' | sed -e 's/\([a-zA-Z]\):\/\(.*\)/\/\1\/\2/'
+# echo "$1" | sed -e 's/\\/\//g' | sed -e 's/\([a-zA-Z]\):\/\(.*\)/\/cygdrive\/\1\/\2/'
+# }
+
+ # returns a successful value (0) if this system is debian or ubuntu.
+ function debian_like() {
+ # decide if we think this is debian or ubuntu or a variant.
+ DEBIAN_LIKE=$(if [ ! -z "$(grep -i debian /etc/issue)" \
+ -o ! -z "$(grep -i ubuntu /etc/issue)" ]; then echo 1; else echo 0; fi)
+ if [ $DEBIAN_LIKE -eq 1 ]; then
+ # success; this is debianish.
+ return 0
+ else
+ # this seems like some other OS.
+ return 1
+ fi
+ }
+
+ # this function wraps the normal sudo by ensuring we replace the terminal
+ # label before we launch what they're passing to sudo. we also preserve
+ # specific variables that enable the main user's ssh credentials to still
+ # be relied on for ssh forwarding, even if the '-i' flag is passed to cause
+ # a fresh shell (which normally doesn't get the launching user's environment
+ # variables).
+ function sudo() {
+ save_terminal_title
+
+ # hoist our X authorization info in case environment is passed along;
+ # this can allow root to use our display to show X.org windows.
+ if [ -z "$IMPORTED_XAUTH" -a ! -z "$DISPLAY" ]; then
+ export IMPORTED_XAUTH="$(xauth list $DISPLAY | head -n 1 | awk '{print $3}')"
+ local REMOVE_IMP_XAUTH=true
+ fi
+
+ # launch sudo with just the variables we want to reach the other side.
+ local varmods=
+ varmods+="OLD_HOME=$HOME "
+ if [ ! -z "$IMPORTED_XAUTH" ]; then varmods+="IMPORTED_XAUTH=$IMPORTED_XAUTH "; fi
+ if [ ! -z "$SSH_AUTH_SOCK" ]; then varmods+="SSH_AUTH_SOCK=$SSH_AUTH_SOCK "; fi
+ /usr/bin/sudo $varmods "$@"
+ retval=$?
+
+ # take the xauth info away again if it wasn't set already.
+ if [ ! -z "$REMOVE_IMP_XAUTH" ]; then
+ unset IMPORTED_XAUTH
+ fi
+ restore_terminal_title
+ return $retval
+ }
+
+ # trashes the .#blah files that cvs and subversion leave behind when finding conflicts.
+ # this kind of assumes you've already checked them for any salient facts.
+ function clean_cvs_junk() {
+ for i in $*; do
+ find $i -follow -type f -iname ".#*" -exec perl $FEISTY_MEOW_SCRIPTS/files/safedel.pl {} ";"
+ done
+ }
+
+ # overlay for nechung binary so that we can complain less grossly about it when it's missing.
+ function nechung() {
+ local wheres_nechung=$(whichable nechung)
+ if [ -z "$wheres_nechung" ]; then
+ echo "The nechung oracle program cannot be found. You may want to consider"
+ echo "rebuilding the feisty meow applications with this command:"
+ echo "bash $FEISTY_MEOW_SCRIPTS/generator/produce_feisty_meow.sh"
+ echo
+ else
+ $wheres_nechung
+ fi
+ }
+
+ # recreates all the generated files that the feisty meow scripts use.
+ function regenerate() {
+ # do the bootstrapping process again.
+ save_terminal_title
+ echo "regenerating feisty meow script environment."
+ bash $FEISTY_MEOW_SCRIPTS/core/reconfigure_feisty_meow.sh
+ echo
+ # force a full reload by turning off sentinel variables and methods.
+ unset -v CORE_VARIABLES_LOADED FEISTY_MEOW_LOADING_DOCK USER_CUSTOMIZATIONS_LOADED \
+ BUILD_VARS_LOADED
+ unalias CORE_ALIASES_LOADED &>/dev/null
+ unset -f function_sentinel
+
+ # reuse the original path if we can.
+ if [ ! -z "$FEISTY_MEOW_ORIGINAL_PATH" ]; then
+ export PATH="$FEISTY_MEOW_ORIGINAL_PATH"
+ fi
+
+ # reload feisty meow environment in current shell.
+ log_feisty_meow_event "reloading the feisty meow scripts for $USER in current shell."
+ source "$FEISTY_MEOW_SCRIPTS/core/launch_feisty_meow.sh"
+ # run nechung oracle to give user a new fortune.
+ nechung
+ restore_terminal_title
+ }
+
+ # merges a set of custom scripts into the feisty meow environment. can be
+ # passed a name to use as the custom scripts source folder (found on path
+ # $FEISTY_MEOW_SCRIPTS/customize/{name}), or it will try to guess the name
+ # by using the login name.
+ function recustomize()
+ {
+ local custom_user="$1"; shift
+ if [ -z "$custom_user" ]; then
+ # default to login name if there was no name provided.
+ custom_user="$(fm_username)"
+ # we do intend to use the login name here to get the login name and to ignore
+ # if the user has sudo root access; we don't want to provide a custom
+ # profile for root.
+ fi
+ # chop off any email address style formatting to leave just the name.
+ custom_user="$(echo "$custom_user" | cut -f1 -d'@')"
+
+ save_terminal_title
+
+ if [ ! -d "$FEISTY_MEOW_SCRIPTS/customize/$custom_user" ]; then
+ echo -e "the customization folder for '$custom_user' is missing:
+
+ $FEISTY_MEOW_SCRIPTS/customize/$custom_user
+
+we will skip recustomization, but these other customizations are available:
+"
+ # a little tr and sed magic to fix the carriage returns into commas.
+ local line="$(find $FEISTY_MEOW_SCRIPTS/customize -mindepth 1 -maxdepth 1 -type d -exec basename {} ';' | tr '\n' '&' | sed 's/&/, /g' | sed -e 's/, $//')"
+ # make the line feeds and carriage returns manageable with tr.
+ # convert the ampersand, our weird replacement for EOL, with a comma + space in sed.
+ # last touch with sed removes the last comma.
+ echo " $line"
+ return 1
+ fi
+
+ # recreate the feisty meow loading dock.
+ regenerate >/dev/null
+
+ # jump into the loading dock and make our custom link.
+ pushd "$FEISTY_MEOW_LOADING_DOCK" &>/dev/null
+ if [ -h custom ]; then
+ # there's an existing link, so remove it.
+ \rm custom
+ fi
+ # make sure we cleaned up the area before we re-link.
+ if [ -h custom -o -d custom -o -f custom ]; then
+ echo "
+Due to an over-abundance of caution, we are not going to remove an unexpected
+'custom' object found in the file system. This object is located in the
+feisty meow loading dock here: $(pwd)
+And here is a description of the rogue 'custom' object:
+"
+ ls -al custom
+ echo "
+If you are pretty sure that this is just a remnant of an older approach in
+feisty meow, where we copied the custom directory rather than linking it
+(and it most likely is just such a bit of cruft of that nature), then please
+remove that old remnant 'custom' item, for example by saying:
+ /bin/rm -rf \"custom\" ; popd
+Sorry for the interruption, but we want to make sure this removal wasn't
+automatic if there is even a small amount of doubt about the issue."
+ return 1
+ fi
+
+ # create the custom folder as a link to the customizations.
+ ln -s "$FEISTY_MEOW_SCRIPTS/customize/$custom_user" custom
+
+ popd &>/dev/null
+
+ # now take into account all the customizations by regenerating the feisty meow environment.
+ regenerate
+
+ restore_terminal_title
+ }
+
+ # generates a random password where the first parameter is the number of characters
+ # in the password (default 20) and the second parameter specifies whether to use
+ # special characters (1) or not (0).
+ # found function at http://legroom.net/2010/05/06/bash-random-password-generator
+ function random_password()
+ {
+ [ "$2" == "0" ] && CHAR="[:alnum:]" || CHAR="[:graph:]"
+ cat /dev/urandom | tr -cd "$CHAR" | head -c ${1:-32}
+ echo
+ }
+
+ function add_cygwin_drive_mounts() {
+ for i in c d e f g h q z ; do
+#hmmm: improve this by not adding the link if already there, or if the drive is not valid.
+ ln -s /cygdrive/$i $i
+ done
+ }
+
+ ############################
+
+ # takes a file to modify, and then it will replace any occurrences of the
+ # pattern provided as the second parameter with the text in the third
+ # parameter.
+ function replace_pattern_in_file()
+ {
+ local file="$1"; shift
+ local pattern="$1"; shift
+ local replacement="$1"; shift
+ if [ -z "$file" -o -z "$pattern" -o -z "$replacement" ]; then
+ echo "replace_pattern_in_file: needs a filename, a pattern to replace, and the"
+ echo "text to replace that pattern with."
+ return 1
+ fi
+ sed -i -e "s%$pattern%$replacement%g" "$file"
+ }
+
+ # similar to replace_pattern_in_file, but also will add the new value
+ # when the old one did not already exist in the file.
+ function replace_if_exists_or_add()
+ {
+ local file="$1"; shift
+ local phrase="$1"; shift
+ local replacement="$1"; shift
+ if [ -z "$file" -o ! -f "$file" -o -z "$phrase" -o -z "$replacement" ]; then
+ echo "replace_if_exists_or_add: needs a filename, a phrase to replace, and the"
+ echo "text to replace that phrase with."
+ return 1
+ fi
+ grep "$phrase" "$file" >/dev/null
+ # replace if the phrase is there, otherwise add it.
+ if [ $? -eq 0 ]; then
+ replace_pattern_in_file "$file" "$phrase" "$replacement"
+ else
+ # this had better be the complete line.
+ echo "$replacement" >>"$file"
+ fi
+ }
+
+ ############################
+
+ # finds a variable (first parameter) in a particular property file
+ # (second parameter). the expected format for the file is:
+ # varX=valueX
+ function seek_variable()
+ {
+ local find_var="$1"; shift
+ local file="$1"; shift
+ if [ -z "$find_var" -o -z "$file" -o ! -f "$file" ]; then
+ echo -e "seek_variable: needs two parameters, firstly a variable name, and\nsecondly a file where the variable's value will be sought." 1>&2
+ return 1
+ fi
+
+ while read line; do
+ if [ ${#line} -eq 0 ]; then continue; fi
+ # split the line into the variable name and value.
+ IFS='=' read -a assignment <<< "$line"
+ local var="${assignment[0]}"
+ local value="${assignment[1]}"
+ if [ "${value:0:1}" == '"' ]; then
+ # assume the entry was in quotes and remove them.
+ value="${value:1:$((${#value} - 2))}"
+ fi
+ if [ "$find_var" == "$var" ]; then
+ echo "$value"
+ fi
+ done < "$file"
+ }
+
+ # finds a variable (first parameter) in a particular XML format file
+ # (second parameter). the expected format for the file is:
+ # ... name="varX" value="valueX" ...
+ function seek_variable_in_xml()
+ {
+ local find_var="$1"; shift
+ local file="$1"; shift
+ if [ -z "$find_var" -o -z "$file" -o ! -f "$file" ]; then
+ echo "seek_variable_in_xml: needs two parameters, firstly a variable name, and"
+ echo "secondly an XML file where the variable's value will be sought."
+ return 1
+ fi
+
+ while read line; do
+ if [ ${#line} -eq 0 ]; then continue; fi
+ # process the line to make it more conventional looking.
+ line="$(echo "$line" | sed -e 's/.*name="\([^"]*\)" value="\([^"]*\)"/\1=\2/')"
+ # split the line into the variable name and value.
+ IFS='=' read -a assignment <<< "$line"
+ local var="${assignment[0]}"
+ local value="${assignment[1]}"
+ if [ "${value:0:1}" == '"' ]; then
+ # assume the entry was in quotes and remove them.
+ value="${value:1:$((${#value} - 2))}"
+ fi
+ if [ "$find_var" == "$var" ]; then
+ echo "$value"
+ fi
+ done < "$file"
+ }
+
+ ############################
+
+ # goes to a particular directory passed as parameter 1, and then removes all
+ # the parameters after that from that directory.
+ function push_whack_pop()
+ {
+ local dir="$1"; shift
+ pushd "$dir" &>/dev/null
+ if [ $? -ne 0 ]; then echo failed to enter dir--quitting.; fi
+ rm -rf $* &>/dev/null
+ if [ $? -ne 0 ]; then echo received a failure code when removing.; fi
+ popd &>/dev/null
+ }
+
+ ##############
+
+# new breed of definer functions goes here. still in progress.
+
+ # defines an alias and remembers that this is a new or modified definition.
+ # if the feisty meow codebase is unloaded, then so are all the aliases that
+ # were defined.
+ function define_yeti_alias()
+ {
+# if alias exists already, save old value for restore,
+# otherwise save null value for restore,
+# have to handle unaliasing if there was no prior value of one
+# we newly defined.
+# add alias name to a list of feisty defined aliases.
+
+#hmmm: first implem, just do the alias and get that working...
+alias "${@}"
+
+
+return 0
+ }
+
+ ##############
+
+#hmmm: this points to an extended functions file being needed; not all of these are core.
+
+ # displays documentation in "md" formatted files.
+ function show_md()
+ {
+ local file="$1"; shift
+ pandoc "$file" | lynx -stdin
+ }
+
+ ##############
+
+ # just shows a separator line for an 80 column console, or uses the first
+ # parameter as the number of columns to expect.
+ function separator()
+ {
+ count=$1; shift
+ if [ -z "$count" ]; then
+ count=$(($COLUMNS - 1))
+ fi
+ echo
+ local i
+ for ((i=0; i < $count; i++)); do
+ echo -n "="
+ done
+ echo
+ echo
+ }
+ # alias for separator.
+ function sep()
+ {
+ separator $*
+ }
+
+ ##############
+
+ # count the number of sub-directories in a directory and echo the result.
+ function count_directories()
+ {
+ local subbydir="$1"; shift
+ numdirs="$(find "$subbydir" -mindepth 1 -maxdepth 1 -type d | wc -l)"
+ echo $numdirs
+ }
+
+ # takes a string and capitalizes just the first character. any capital letters in the remainder of
+ # the string are made lower case. the processed string is returned by an echo.
+ function capitalize_first_char()
+ {
+ local to_dromedary="$1"; shift
+ to_dromedary="$(tr '[:lower:]' '[:upper:]' <<< ${to_dromedary:0:1})$(tr '[:upper:]' '[:lower:]' <<< ${to_dromedary:1})"
+ echo "$to_dromedary"
+ }
+
+ # given a source path and a target path, this will make a symbolic link from
+ # the source to the destination, but only if the source actually exists.
+ function make_safe_link()
+ {
+ local src="$1"; shift
+ local target="$1"; shift
+
+ if [ -d "$src" ]; then
+ ln -s "$src" "$target"
+ exit_on_error "Creating symlink from '$src' to '$target'"
+ fi
+ echo "Created symlink from '$src' to '$target'."
+ }
+
+ # pretty prints the json files provided as parameters.
+ function clean_json()
+ {
+ if [ -z "$*" ]; then return; fi
+ local show_list=()
+ while true; do
+ local file="$1"; shift
+ if [ -z "$file" ]; then break; fi
+ if [ ! -f "$file" ]; then "echo File '$file' does not exist."; continue; fi
+ temp_out="$TMP/$file.view"
+ cat "$file" | python -m json.tool > "$temp_out"
+ show_list+=($temp_out)
+ continue_on_error "pretty printing '$file'"
+ done
+ filedump "${show_list[@]}"
+ rm "${show_list[@]}"
+ }
+
+ function json_text()
+ {
+ # only print our special headers or text fields.
+ local CR=$'\r'
+ local LF=$'\n'
+ clean_json $* |
+ grep -i "\"text\":\|^=.*" |
+ sed -e "s/\\\\r/$CR/g" -e "s/\\\\n/\\$LF/g"
+ }
+
+ ##############
+
+ # echoes the machine's hostname. can be used like so:
+ # local my_host=$(get_hostname)
+ function get_hostname()
+ {
+ # there used to be more variation in how to do this, but adopting mingw
+ # and cygwin tools really helped out.
+ local this_host=unknown
+ if [ "$OS" == "Windows_NT" ]; then
+ this_host=$(hostname)
+ elif [ ! -z "$(echo $MACHTYPE | grep apple)" ]; then
+ this_host=$(hostname)
+ elif [ ! -z "$(echo $MACHTYPE | grep suse)" ]; then
+ this_host=$(hostname --long)
+ elif [ -x "$(whichable hostname)" ]; then
+ this_host=$(hostname)
+ fi
+ echo "$this_host"
+ }
+
+ # makes sure that the provided "folder" is a directory and is writable.
+ function test_writeable()
+ {
+ local folder="$1"; shift
+ if [ ! -d "$folder" -o ! -w "$folder" ]; then return 1; fi
+ return 0
+ }
+
+ ##############
+
+ # given a filename and a string to seek and a number of lines, then this
+ # function will remove the first occurrence of a line in the file that
+ # matches the string, and it will also axe the next N lines as specified.
+ function create_chomped_copy_of_file()
+ {
+ local filename="$1"; shift
+ local seeker="$1"; shift
+ local numlines=$1; shift
+
+#echo into create_chomped_copy...
+#var filename seeker numlines
+
+ # make a backup first, oy.
+ \cp -f "$filename" "/tmp/$(basename ${filename}).bkup-${RANDOM}"
+ exit_on_error "backing up file: $filename"
+
+ # make a temp file to write to before we move file into place in bind.
+ local new_version="/tmp/$(basename ${filename}).bkup-${RANDOM}"
+ \rm -f "$new_version"
+ exit_on_error "cleaning out new version of file from: $new_version"
+
+ local line
+ local skip_count=0
+ local found_any=
+ while read line; do
+ # don't bother looking at the lines if we're already in skip mode.
+ if [[ $skip_count == 0 ]]; then
+ # find the string they're seeking.
+ if [[ ! "$line" =~ .*${seeker}.* ]]; then
+ # no match.
+ echo "$line" >> "$new_version"
+ else
+ # a match! start skipping. we will delete this line and the next N lines.
+ ((skip_count++))
+#echo first skip count is now $skip_count
+ found_any=yes
+ fi
+ else
+ # we're already skipping. let's keep going until we hit the limit.
+ ((skip_count++))
+#echo ongoing skip count is now $skip_count
+ if (( $skip_count > $numlines )); then
+ echo "Done skipping, and back to writing output file."
+ skip_count=0
+ fi
+ fi
+ done < "$filename"
+
+#echo file we created looks like this:
+#cat "$new_version"
+
+ if [ ! -z "$found_any" ]; then
+ # put the file back into place under the original name.
+ \mv "$new_version" "$filename"
+ exit_on_error "moving the new version into place in: $filename"
+ else
+ # cannot always be considered an error, but we can at least gripe.
+ echo "Did not find any matches for seeker '$seeker' in file: $filename"
+ fi
+ }
+
+ ##############
+
+ # space 'em all: fixes naming for all of the files of the appropriate types
+ # in the directories specified.
+ function spacemall() {
+ local -a dirs=("${@}")
+ if [ ${#dirs[@]} -eq 0 ]; then
+ dirs=(.)
+ fi
+
+ local charnfile="$(mktemp $TMP/zz_charn.XXXXXX)"
+#hmmm: any way to do the below more nicely or reusably?
+#hmmm: yes! a variable with a list of files that are considered TEXT_FILE_EXTENSIONS or something like that.
+#hmmm: yes continued! also a variable for BINARY_FILE_EXTENSIONS to avoid those, where we need to in other scripts.
+ find "${dirs[@]}" -follow -maxdepth 1 -mindepth 1 -type f -and -not -iname ".[a-zA-Z0-9]*" | \
+ grep -i \
+"csv\|doc\|docx\|eml\|html\|jpeg\|jpg\|m4a\|mov\|mp3\|ods\|odt\|pdf\|png\|ppt\|pptx\|rtf\|txt\|vsd\|vsdx\|xls\|xlsx\|xml\|zip" | \
+ sed -e 's/^/"/' | sed -e 's/$/"/' | \
+ xargs bash "$FEISTY_MEOW_SCRIPTS/files/spacem.sh"
+ # drop the temp file now that we're done.
+ rm "$charnfile"
+ }
+
+ ##############
+
+ # tty relevant functions...
+
+ # keep_awake: sends a message to the screen from the background.
+ function keep_awake()
+ {
+ # just starts the keep_awake process in the background.
+ bash $FEISTY_MEOW_SCRIPTS/tty/keep_awake_process.sh &
+ # this should leave the job running as %1 or a higher number if there
+ # are pre-existing background jobs.
+ }
+
+ ##############
+
+ # site avenger functions...
+
+ function switchto()
+ {
+ THISDIR="$FEISTY_MEOW_SCRIPTS/site_avenger"
+ source "$FEISTY_MEOW_SCRIPTS/site_avenger/shared_site_mgr.sh"
+ switch_to "$1"
+ }
+
+ ##############
+
+ # you have hit the borderline functional zone...
+
+#hmmm: not really doing anything yet; ubuntu seems to have changed from pulseaudio in 17.04?
+ # restarts the sound driver.
+ function fix_sound_driver() {
+ # stop bash complaining about blank function body.
+ local nothing=
+#if alsa something
+# sudo service alsasound restart
+#elif pulse something
+# sudo pulseaudio -k
+# sudo pulseaudio -D
+#else
+# something else...?
+#fi
+
+ }
+
+ # ...and here's the end of the borderline functional zone.
+
+ ##############
+
+ # NOTE: no more function definitions are allowed after this point.
+
+ function function_sentinel()
+ {
+ return 0;
+ }
+
+ if [ ! -z "$DEBUG_FEISTY_MEOW" ]; then echo "feisty meow function definitions done."; fi
+
+ ##############
+
+ # test code for set_var_if_undefined.
+ run_test=0
+ if [ $run_test != 0 ]; then
+ echo running tests on set_var_if_undefined.
+ flagrant=petunia
+ set_var_if_undefined flagrant forknordle
+ exit_on_error "testing if defined variable would be whacked"
+ if [ $flagrant != petunia ]; then
+ echo set_var_if_undefined failed to leave the test variable alone
+ exit 1
+ fi
+ unset bobblehead_stomper
+ set_var_if_undefined bobblehead_stomper endurance
+ if [ $bobblehead_stomper != endurance ]; then
+ echo set_var_if_undefined failed to set a variable that was not defined yet
+ exit 1
+ fi