dotfiles/bin/headlessvnc

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#!/bin/bash
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# shellcheck disable=SC2317
# cd to the local VNC directory, exit if it fails
cd "${HOME}/.vnc" || exit 5
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# Variables
file_base="./$(hostname):1."
verbs="start status stop restart help"
echobf() {
printf '\033[1m%s\033[0m\n' "$*"
}
print_error() {
>&2 (
printf '\033[1;31m%s\033[0m ' "ERROR:"
echobf "$*"
)
}
error() {
print_error "$1"
shift
exit "$1"
}
is_running() {
vncserver -list | grep -q '^:1'
}
public_help() {
local name
name="$(basename "$0")"
cat << EOF
${name} - Start a VNC server
Usage:
${name} $(echo "$verbs" | sed 's/ /|/g')
EOF
}
error_help() {
print_error "Invalid usage"
public_help
return 1
}
public_start() {
if ! is_running; then
set -e
vncserver \
-xstartup ./xstartup \
-localhost \
-alwaysshared \
-securitytypes none
else
error "The VNC server is already running!" 4
fi
}
public_status() {
local log_f="${file_base}log"
if is_running; then
echobf "The VNC server is running."
tail "$log_f" | sed 's/^/\t/g'
else
echobf "The VNC server is not running."
fi
}
public_stop() {
if is_running; then
vncserver -kill :1
else
error "The VNC server is not running!" 3
fi
}
public_restart() {
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stop
start
}
# Argument parsing
set -e; trap 'set +e; error "$error" "$?"' EXIT
error="You must give an argument"; [ -n "$1" ]; arg="$1"; shift; unset error
set +e; trap - EXIT
# Main case statement
if echo "$verbs" | grep -q "$arg"; then
"public_${arg}"
else
error_usage
fi
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