guacamole-spice-protocol/bin/guacctl

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#!/bin/sh
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
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#
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# guacctl
# -------
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#
# Utility for sending Guacamole-specific console codes for controlling a
# terminal session, such as:
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#
# * Downloading files (SSH only)
# * Setting the destination directory for uploads (SSH only)
# * Redirecting output to a named pipe stream (SSH or telnet)
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#
# This script may also be run as "guacget", in which case the script accepts
# no options and assumes anything given on the commandline is a file to be
# downloaded.
#
##
## Given the name of a file, which may be a relative path, produce the full,
## real, non-relative path for that same file.
##
## @param FILENAME
## The name of the file to produce the full path of.
##
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fullpath() {
FILENAME="$1"
DIR=`dirname "$FILENAME"`
FILE=`basename "$FILENAME"`
(cd "$DIR" && echo "$PWD/$FILE")
}
##
## Sends the Guacamole-specific console code for initiating a download.
##
## @param FILENAME
## The full path of the file to download.
##
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send_download_file() {
FILENAME="$1"
printf "\033]482200;%s\007" "$FILENAME"
}
##
## Sends the Guacamole-specific console code for setting the upload directory.
##
## @param FILENAME
## The full path to the directory which should receive uploads.
##
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send_set_directory() {
FILENAME="$1"
printf "\033]482201;%s\007" "$FILENAME"
}
##
## Sends the Guacamole-specific console code for redirecting output to a named
## pipe stream (instead of the terminal emulator)
##
## @param NAME
## The name of the pipe stream to open.
##
send_open_pipe_stream() {
NAME="$1"
printf "\033]482202;%s\007" "$NAME"
}
##
## Sends the Guacamole-specific console code for redirecting output back to the
## terminal emulator
##
send_close_pipe_stream() {
printf "\033]482203;\007"
}
##
## Prints the given error text to STDERR.
##
## @param ...
## The text to print as an error message.
##
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error() {
echo "$NAME:" "$@" >&2
}
##
## Prints usage documentation for this script.
##
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usage() {
cat >&2 <<END
guacctl 0.9.10-incubating, Guacamole terminal session control utility.
Usage: guacctl [OPTION] [FILE or NAME]...
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-d, --download download each of the files listed.
-s, --set-directory set the destination directory for future uploaded
files.
-o, --open-pipe redirect output to a new pipe stream with the given
name.
-c, --close-pipe close any existing pipe stream and redirect output
back to the terminal emulator.
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END
}
##
## Initiates a download for each of the specified files.
##
## @param ...
## The name of each file that should be downloaded, as originally
## provided to guacctl.
##
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download_files() {
#
# Validate arguments
#
if [ $# -lt 1 ]; then
error "No files specified."
return;
fi
#
# Send download code for each file given
#
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for FILENAME in "$@"; do
if [ -e "$FILENAME" ]; then
send_download_file "`fullpath "$FILENAME"`"
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else
error "$FILENAME: File does not exist."
fi
done
}
##
## Changes the upload path for future uploads to the given directory.
##
## @param ...
## The name of the directory to use for uploads, as provided to guacctl.
##
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set_directory() {
#
# Validate arguments
#
if [ $# -lt 1 ]; then
error "No destination directory specified."
return;
fi
if [ $# -gt 1 ]; then
error "Only one destination directory may be given."
return;
fi
#
# Send code for setting the upload directory
#
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FILENAME="$1"
if [ -d "$FILENAME" ]; then
send_set_directory "`fullpath "$FILENAME"`"
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else
error "$FILENAME: File does not exist or is not a directory."
fi
}
##
## Opens a new pipe stream having the given name and redirects terminal output
## to that stream.
##
## @param ...
## The name of the pipe stream to open, as provided to guacctl.
##
open_pipe_stream() {
#
# Validate arguments
#
if [ $# -lt 1 ]; then
error "No pipe name specified."
return;
fi
if [ $# -gt 1 ]; then
error "Only one pipe name may be given."
return;
fi
#
# Send code for opening the named pipe stream
#
NAME="$1"
send_open_pipe_stream "$NAME"
}
##
## Closes the currently-open pipe stream and redirects terminal output back to
## the terminal emulator
##
## @param ...
## The arguments provided to guacctl, which should be empty.
##
close_pipe_stream() {
#
# Validate arguments
#
if [ $# -gt 0 ]; then
error "Closing an open pipe stream does not require any arguments."
return;
fi
#
# Send code for closing the currently-open named pipe stream
#
send_close_pipe_stream
}
#
# Get script name
#
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NAME=`basename "$0"`
#
# Handle downloads directly if invoked as "guacget"
#
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if [ "x$NAME" = "xguacget" ]; then
download_files "$@"
exit 0;
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fi
#
# Parse options
#
case "$1" in
#
# Download files
#
"--download"|"-d")
shift
download_files "$@"
;;
#
# Set upload directory
#
"--set-directory"|"-s")
shift
set_directory "$@"
;;
#
# Redirect to pipe
#
"--open-pipe"|"-o")
shift
open_pipe_stream "$@"
;;
#
# Redirect back to terminal
#
"--close-pipe"|"-c")
shift
close_pipe_stream "$@"
;;
#
# Show usage info if options are invalid
#
*)
usage
exit 1
;;
esac