316 lines
6.6 KiB
Bash
Executable File
316 lines
6.6 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (C) 2016 Glyptodon LLC
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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#
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# guacctl
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# -------
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#
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# Utility for sending Guacamole-specific console codes for controlling a
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# terminal session, such as:
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#
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# * Downloading files (SSH only)
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# * Setting the destination directory for uploads (SSH only)
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# * Redirecting output to a named pipe stream (SSH or telnet)
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#
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# This script may also be run as "guacget", in which case the script accepts
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# no options and assumes anything given on the commandline is a file to be
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# downloaded.
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#
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##
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## Given the name of a file, which may be a relative path, produce the full,
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## real, non-relative path for that same file.
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##
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## @param FILENAME
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## The name of the file to produce the full path of.
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##
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fullpath() {
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FILENAME="$1"
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DIR=`dirname "$FILENAME"`
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FILE=`basename "$FILENAME"`
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(cd "$DIR" && echo "$PWD/$FILE")
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}
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##
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## Sends the Guacamole-specific console code for initiating a download.
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##
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## @param FILENAME
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## The full path of the file to download.
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##
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send_download_file() {
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FILENAME="$1"
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printf "\033]482200;%s\007" "$FILENAME"
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}
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##
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## Sends the Guacamole-specific console code for setting the upload directory.
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##
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## @param FILENAME
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## The full path to the directory which should receive uploads.
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##
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send_set_directory() {
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FILENAME="$1"
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printf "\033]482201;%s\007" "$FILENAME"
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}
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##
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## Sends the Guacamole-specific console code for redirecting output to a named
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## pipe stream (instead of the terminal emulator)
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##
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## @param NAME
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## The name of the pipe stream to open.
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##
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send_open_pipe_stream() {
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NAME="$1"
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printf "\033]482202;%s\007" "$NAME"
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}
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##
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## Sends the Guacamole-specific console code for redirecting output back to the
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## terminal emulator
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##
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send_close_pipe_stream() {
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printf "\033]482203\007"
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}
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##
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## Prints the given error text to STDERR.
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##
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## @param ...
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## The text to print as an error message.
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##
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error() {
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echo "$NAME:" "$@" >&2
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}
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##
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## Prints usage documentation for this script.
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##
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usage() {
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cat >&2 <<END
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guacctl 0.9.9, Guacamole terminal session control utility.
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Usage: guacctl [OPTION] [FILE or NAME]...
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-d, --download download each of the files listed.
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-s, --set-directory set the destination directory for future uploaded
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files.
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-o, --open-pipe redirect output to a new pipe stream with the given
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name.
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-c, --close-pipe close any existing pipe stream and redirect output
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back to the terminal emulator.
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END
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}
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##
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## Initiates a download for each of the specified files.
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##
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## @param ...
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## The name of each file that should be downloaded, as originally
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## provided to guacctl.
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##
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download_files() {
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#
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# Validate arguments
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#
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if [ $# -lt 1 ]; then
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error "No files specified."
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return;
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fi
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#
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# Send download code for each file given
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#
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for FILENAME in "$@"; do
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if [ -e "$FILENAME" ]; then
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send_download_file "`fullpath "$FILENAME"`"
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else
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error "$FILENAME: File does not exist."
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fi
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done
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}
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##
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## Changes the upload path for future uploads to the given directory.
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##
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## @param ...
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## The name of the directory to use for uploads, as provided to guacctl.
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##
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set_directory() {
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#
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# Validate arguments
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#
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if [ $# -lt 1 ]; then
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error "No destination directory specified."
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return;
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fi
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if [ $# -gt 1 ]; then
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error "Only one destination directory may be given."
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return;
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fi
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#
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# Send code for setting the upload directory
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#
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FILENAME="$1"
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if [ -d "$FILENAME" ]; then
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send_set_directory "`fullpath "$FILENAME"`"
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else
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error "$FILENAME: File does not exist or is not a directory."
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fi
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}
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##
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## Opens a new pipe stream having the given name and redirects terminal output
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## to that stream.
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##
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## @param ...
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## The name of the pipe stream to open, as provided to guacctl.
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##
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open_pipe_stream() {
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#
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# Validate arguments
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#
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if [ $# -lt 1 ]; then
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error "No pipe name specified."
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return;
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fi
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if [ $# -gt 1 ]; then
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error "Only one pipe name may be given."
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return;
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fi
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#
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# Send code for opening the named pipe stream
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#
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NAME="$1"
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send_open_pipe_stream "$NAME"
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}
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##
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## Closes the currently-open pipe stream and redirects terminal output back to
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## the terminal emulator
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##
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## @param ...
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## The arguments provided to guacctl, which should be empty.
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##
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close_pipe_stream() {
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#
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# Validate arguments
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#
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if [ $# -gt 0 ]; then
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error "Closing an open pipe stream does not require any arguments."
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return;
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fi
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#
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# Send code for closing the currently-open named pipe stream
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#
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send_close_pipe_stream
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}
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#
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# Get script name
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#
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NAME=`basename "$0"`
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#
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# Handle downloads directly if invoked as "guacget"
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#
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if [ "x$NAME" = "xguacget" ]; then
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download_files "$@"
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exit 0;
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fi
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#
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# Parse options
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#
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case "$1" in
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#
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# Download files
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#
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"--download"|"-d")
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shift
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download_files "$@"
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;;
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#
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# Set upload directory
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#
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"--set-directory"|"-s")
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shift
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set_directory "$@"
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;;
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#
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# Redirect to pipe
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#
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"--open-pipe"|"-o")
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shift
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open_pipe_stream "$@"
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;;
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#
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# Redirect back to terminal
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#
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"--close-pipe"|"-c")
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shift
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close_pipe_stream "$@"
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;;
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#
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# Show usage info if options are invalid
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#
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*)
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usage
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exit 1
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;;
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esac
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