Attachment 274 Details for Bug 2967 – My previous attempt on this

My previous attempt on this

xvfb-run (text/plain), 4.58 KB, created by Mikhail Zabaluev on 2003-09-11 12:43:41 MSD

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Creator: Mikhail Zabaluev

Created: 2003-09-11 12:43:41 MSD

Size: 4.58 KB

patch

obsolete

>#!/bin/sh -e
>
># xvfb-run - run the specified command in a virtual X server
>
># 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 and xfonts-base.
>#
># If anyone is using this to build an ALT Linux package, make sure the
># package BuildRequires XFree86-Xvfb and XFree86-utils.
>
>DISPLAYNUM=90
>STARTWAIT=5
>LISTENTCP="-nolisten tcp"
>AUTODISPLAYNUM=n
>
>usage()
>{
>  echo "Usage: $0 [OPTION]... [command]"
>  echo
>  echo "run specified X client or command in a virtual X server environment"
>  echo
>  echo "  -a --auto-displaynum      Try to get a free display number, starting at --display-num"
>  echo "  -n --display-num=NUM      Display number to use (default:$DISPLAYNUM)"
>  echo "  -l --listen-tcp           Enable TCP port listening in the X server"
>  echo "  -t --timeout=DELAY        Timeout in seconds to wait for Xvfb to start (default:$STARTWAIT)"
>  echo "  -h --help                 Display this help and exit"
>}
>
>force_kill_xvfb() {
>	kill $XVFBPID 2> /dev/null ||:
>}
>
># Start an Xvfb server process in the background
># using the display number passed as a parameter.
># Perform checks to guard against a premature server exit or a display hijack.
># Set the XVFBPID variable to the PID of the server started.
>start_xvfb() {
>	local dispnum=$1
>
>	# start Xvfb in the background and wait a little
>	Xvfb :$dispnum -screen 0 640x480x8 $LISTENTCP > /dev/null 2>&1 &
>	XVFBPID=$!
>
>	# poll for the server lock file to appear
>	local countdown=$STARTWAIT
>	while [ ! -r /tmp/.X$dispnum-lock ]; do
>		if [ $countdown = 0 ]; then
>			echo "$0: can't access lockfile /tmp/.X$dispnum-lock" >&2
>			force_kill_xvfb
>			return 2
>		fi
>		sleep 1
>		countdown=$((countdown-1))
>	done
>
>	# check if it really is our process behind the display
>	if [ ! -O /tmp/.X$dispnum-lock ]; then
>		echo "$0: can't obtain lockfile /tmp/.X$dispnum-lock" >&2
>		force_kill_xvfb
>		return 1
>	fi
>	local lockpid
>	read lockpid < /tmp/.X$dispnum-lock
>	if [ "$XVFBPID" != "$lockpid" ]; then
>		echo "$0: display :$dispnum has been taken by another process" >&2
>		force_kill_xvfb
>		return 1
>	fi
>
>	# Poll for the X server socket to be established
>	while [ ! -O /tmp/.X11-unix/X$dispnum ]; do
>		if [ $countdown = 0 ]; then
>			echo "$0: can't access socket for display :$dispnum" >&2
>			force_kill_xvfb
>			return 2
>		fi
>		sleep 1
>		countdown=$((countdown-1))
>	done
>
>	# finally, check that the server has not exited
>	if ! kill -0 $XVFBPID 2>/dev/null; then
>		echo "$0: Xvfb server has died" >&2
>		return 2
>	fi
>
>	return 0
>}
>
># Shut down the Xvfb server whose PID is in the XVFBPID variable
>shutdown_xvfb() {
>	kill $XVFBPID ||:
>}
>
>
># Parse command line
>ARGS=`getopt --options +an:lt:w:h \
>	--long auto-displaynum,display-num:,listen-tcp,timeout:,wait:,help \
>	--name "$0" -- "$@"`
>eval set -- "$ARGS"
>while true ; do
>    case "$1" in
>      '-a'|'--auto-displaynum')
>      	    AUTODISPLAYNUM=y
>      	    ;;
>      '-n'|'--display-num')
>	    DISPLAYNUM="$2"
>	    shift
>	    ;;
>      '-l'|'--listen-tcp')
>	    LISTENTCP=
>	    ;;
>      '-t'|'--timeout'|'-w'|'--wait')
>	    STARTWAIT="$2"
>	    shift
>	    ;;
>      '-h'|'--help')
>	    usage
>	    exit 1
>	    ;;
>      '--')
>	    # end of options
>	    shift
>	    break
>	    ;;
>    esac
>
>    shift
>done
>
># create the transient authority file
>AUTHFILE=$(mktemp -t xvfb-run.XXXXXXXX)
>XAUTHORITY="$AUTHFILE"
>export XAUTHORITY
>MCOOKIE=$(mcookie)
>
># The main loop increments display numbers
>while true ; do
>	# check for the X server lock file
>	if [ -f /tmp/.X$DISPLAYNUM-lock ]; then
>		if [ $AUTODISPLAYNUM = y ]; then
>			DISPLAYNUM=$((DISPLAYNUM+1))
>			continue
>		else
>			echo "$0: lock file exists for display $DISPLAYNUM" >&2
>			RETVAL=1
>			break
>		fi
>	fi
>
>	# set up an X authority cookie
>	xauth add :$DISPLAYNUM . $MCOOKIE >/dev/null 2>&1
>
>	# start Xvfb
>	start_xvfb $DISPLAYNUM
>	XVFBSTATUS=$?
>	case $XVFBSTATUS in
>	    0)
>		# run the command and save its exit status
>		set +e
>		DISPLAY=:$DISPLAYNUM "$@"
>		RETVAL=$?
>		set -e
>		# kill Xvfb
>		shutdown_xvfb
>		break
>		;;
>	    1)
>		# a non-fatal startup failure
>		# (can fall back to other display number)
>		if [ $AUTODISPLAYNUM != y ]; then
>			RETVAL=$XVFBSTATUS
>			break
>		fi
>		;;
>	    2)
>		# a fatal startup failure
>		RETVAL=$XVFBSTATUS
>		break
>		;;
>	esac
>
>	# clean up
>	xauth remove :$DISPLAYNUM >/dev/null 2>&1
>
>	# continue with the next display number
>	DISPLAYNUM=$((DISPLAYNUM+1))
>done
>
># remove the authority file
>rm -f "$AUTHFILE"
>
># return the executed command's exit status
>exit $RETVAL

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