#!/bin/sh

# --- T2-COPYRIGHT-NOTE-BEGIN ---

# This copyright note is auto-generated by ./scripts/Create-CopyPatch.

# 

# T2 SDE: package/.../xorg-server/xvfb-run.sh

# Copyright (C) 2005 The T2 SDE Project

# Copyright (C) XXXX - 2005 Debian

# 

# More information can be found in the files COPYING and README.

# 

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; version 2 of the License. A copy of the

# GNU General Public License can be found in the file COPYING.

# --- T2-COPYRIGHT-NOTE-END ---

# $Id$

# from: http://necrotic.deadbeast.net/xsf/XFree86/trunk/debian/local/xvfb-run

# This script starts an instance of Xvfb, the "fake" X server, runs a command

# with that server available, and kills the X server when done.  The return

# value of the command becomes the return value of this script.

#

# If anyone is using this to build a Debian package, make sure the package

# Build-Depends on xvfb, xbase-clients, and xfonts-base.

set -e

PROGNAME=xvfb-run

SERVERNUM=99

AUTHFILE=

ERRORFILE=/dev/null

STARTWAIT=3

XVFBARGS="-screen 0 640x480x8"

LISTENTCP="-nolisten tcp"

XAUTHPROTO=.

# Query the terminal to establish a default number of columns to use for

# displaying messages to the user.  This is used only as a fallback in the event

# the COLUMNS variable is not set.  ($COLUMNS can react to SIGWINCH while the

# script is running, and this cannot, only being calculated once.)

DEFCOLUMNS=$(stty size 2>/dev/null | awk '{print $2}') || true

if ! expr "$DEFCOLUMNS" : "[[:digit:]]\+$" >/dev/null 2>&1; then

    DEFCOLUMNS=80

fi

# Display a message, wrapping lines at the terminal width.

message () {

    echo "$PROGNAME: $*" | fmt -t -w ${COLUMNS:-$DEFCOLUMNS}

}

# Display an error message.

error () {

    message "error: $*" >&2

}

# Display a usage message.

usage () {

    if [ -n "$*" ]; then

        message "usage error: $*"

    fi

    cat <

Usage: $PROGNAME [OPTION ...] COMMAND

Run COMMAND (usually an X client) in a virtual X server environment.

Options:

-a        --auto-servernum          try to get a free server number, starting at

                                    --server-num (deprecated, use --auto-display

                                    instead)

-d        --auto-display            use the X server to find a display number

                                    automatically

-e FILE   --error-file=FILE         file used to store xauth errors and Xvfb

                                    output (default: $ERRORFILE)

-f FILE   --auth-file=FILE          file used to store auth cookie

                                    (default: ./.Xauthority)

-h        --help                    display this usage message and exit

-n NUM    --server-num=NUM          server number to use (default: $SERVERNUM)

-l        --listen-tcp              enable TCP port listening in the X server

-p PROTO  --xauth-protocol=PROTO    X authority protocol name to use

                                    (default: xauth command's default)

-s ARGS   --server-args=ARGS        arguments (other than server number and

                                    "-nolisten tcp") to pass to the Xvfb server

                                    (default: "$XVFBARGS")

-w DELAY  --wait=DELAY              delay in seconds to wait for Xvfb to start

                                    before running COMMAND (default: $STARTWAIT)

EOF

}

# Find a free server number by looking at .X*-lock files in /tmp.

find_free_servernum() {

    # Sadly, the "local" keyword is not POSIX.  Leave the next line commented in

    # the hope Debian Policy eventually changes to allow it in /bin/sh scripts

    # anyway.

    #local i

    i=$SERVERNUM

    while [ -f /tmp/.X$i-lock ]; do

        i=$(($i + 1))

    done

    echo $i

}

# Parse the command line.

ARGS=$(getopt --options +ade:f:hn:lp:s:w: \

       --long auto-servernum,error-file:auth-file:,help,server-num:,listen-tcp,xauth-protocol:,server-args:,wait: \

       --name "$PROGNAME" -- "$@")

GETOPT_STATUS=$?

if [ $GETOPT_STATUS -ne 0 ]; then

    error "internal error; getopt exited with status $GETOPT_STATUS"

    exit 6

fi

eval set -- "$ARGS"

while :; do

    case "$1" in

        -a|--auto-servernum) SERVERNUM=$(find_free_servernum) ;;

        -d|--auto-display) AUTO_DISPLAY=1 ;;

        -e|--error-file) ERRORFILE="$2"; shift ;;

        -f|--auth-file) AUTHFILE="$2"; shift ;;

        -h|--help) SHOWHELP="yes" ;;

        -n|--server-num) SERVERNUM="$2"; shift ;;

        -l|--listen-tcp) LISTENTCP="" ;;

        -p|--xauth-protocol) XAUTHPROTO="$2"; shift ;;

        -s|--server-args) XVFBARGS="$2"; shift ;;

        -w|--wait) STARTWAIT="$2"; shift ;;

        --) shift; break ;;

        *) error "internal error; getopt permitted \"$1\" unexpectedly"

           exit 6

           ;;

    esac

    shift

done

if [ "$SHOWHELP" ]; then

    usage

    exit 0

fi

if [ -z "$*" ]; then

    usage "need a command to run" >&2

    exit 2

fi

if ! which xauth >/dev/null; then

    error "xauth command not found"

    exit 3

fi

# Set up the temp dir for the pid and X authorization file

XVFB_RUN_TMPDIR="$(mktemp --directory --tmpdir $PROGNAME.XXXXXX)"

# If the user did not specify an X authorization file to use, set up a temporary

# directory to house one.

if [ -z "$AUTHFILE" ]; then

    AUTHFILE=$(mktemp -p "$XVFB_RUN_TMPDIR" Xauthority.XXXXXX)

fi

# Start Xvfb.

MCOOKIE=$(mcookie)

if [ -z "$AUTO_DISPLAY" ]; then

  # Old style using a pre-computed SERVERNUM

  XAUTHORITY=$AUTHFILE Xvfb ":$SERVERNUM" $XVFBARGS $LISTENTCP >>"$ERRORFILE" \

  2>&1 &

  XVFBPID=$!

else

  # New style using Xvfb to provide a free display

  PIDFILE=$(mktemp -p "$XVFB_RUN_TMPDIR" pid.XXXXXX)

  SERVERNUM=$(XAUTHORITY=$AUTHFILE Xvfb -displayfd 1 $XVFBARGS $LISTENTCP \

  2>"$ERRORFILE" & echo $! > $PIDFILE)

  XVFBPID=$(cat $PIDFILE)

fi

sleep "$STARTWAIT"

XAUTHORITY=$AUTHFILE xauth source - << EOF >>"$ERRORFILE" 2>&1

add :$SERVERNUM $XAUTHPROTO $MCOOKIE

EOF

# Start the command and save its exit status.

set +e

DISPLAY=:$SERVERNUM XAUTHORITY=$AUTHFILE "$@" 2>&1

RETVAL=$?

set -e

# Kill Xvfb now that the command has exited.

kill $XVFBPID

# Clean up.

XAUTHORITY=$AUTHFILE xauth remove ":$SERVERNUM" >"$ERRORFILE" 2>&1

if [ -n "$XVFB_RUN_TMPDIR" ]; then

    if ! rm -r "$XVFB_RUN_TMPDIR"; then

        error "problem while cleaning up temporary directory"

        exit 5

    fi

fi

# Return the executed command's exit status.

exit $RETVAL

# vim:set ai et sts=4 sw=4 tw=80: