diff options
Diffstat (limited to 'games/megaglest/xvfb-run')
| -rw-r--r-- | games/megaglest/xvfb-run | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/games/megaglest/xvfb-run b/games/megaglest/xvfb-run new file mode 100644 index 0000000000..9dd1d919f2 --- /dev/null +++ b/games/megaglest/xvfb-run @@ -0,0 +1,172 @@ +#!/bin/sh + +# 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=. + +PATH=$PATH:/usr/bin/X11:/usr/X11R6/bin + +# Query the terminal to establish a default number of columns to use for +# displaying messages to the user. This is used only as a fallback in the event +# the COLUMNS variable is not set. ($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 <<EOF +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 +-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 +ae: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) ;; + -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 "$*" ]; then + usage "need a command to run" >&2 + exit 2 +fi + +if ! which xauth >/dev/null; then + error "xauth command not found" + exit 3 +fi + +# If the user did not specify an X authorization file to use, set up a temporary +# directory to house one. +if [ -z "$AUTHFILE" ]; then + XVFB_RUN_TMPDIR="${TMPDIR:-/tmp}/$PROGNAME.$$" + if ! mkdir -p -m 700 "$XVFB_RUN_TMPDIR"; then + error "temporary directory $XVFB_RUN_TMPDIR already exists" + exit 4 + fi + AUTHFILE=$(tempfile -n "$XVFB_RUN_TMPDIR/Xauthority") +fi + +# Start Xvfb. +MCOOKIE=$(mcookie) +XAUTHORITY=$AUTHFILE xauth add ":$SERVERNUM" "$XAUTHPROTO" "$MCOOKIE" \ + >"$ERRORFILE" 2>&1 +XAUTHORITY=$AUTHFILE Xvfb ":$SERVERNUM" $XVFBARGS $LISTENTCP >"$ERRORFILE" \ + 2>&1 & +XVFBPID=$! +sleep "$STARTWAIT" + +# 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: |