82 lines
1.9 KiB
Bash
Executable File
82 lines
1.9 KiB
Bash
Executable File
#!/bin/sh --
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# sx - start an xserver
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# requires fgconsole stty timeout xauth Xorg
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# I'm willing to take advantage of errexit for this script as roughly 85% of
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# the error checking would take the form of:
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# if ! command; then
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# exit
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# fi
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set -o errexit
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error() {
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# To expose printf's DSL we will need to use a positional argument for the
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# format string.
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# shellcheck disable=SC2059
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printf -- "sx: $2" "${@:3}" >&2
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exit "$1"
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}
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cleanup() {
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# Return to conventional flow control here as we need to continue
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# regardless of failure.
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set +o errexit
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if [ "$(ps -o comm= "$1")" = Xorg ]; then
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kill "$1"
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# Send SIGKILL after 10 seconds if the xserver is taking too long to
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# terminate.
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timeout 10 tail --pid="$1" -f /dev/null
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case $? in
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124) kill -s KILL "$1"
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esac
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xauth remove :"$tty"
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fi
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if ! stty "$stty"; then
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stty sane
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fi
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exit
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}
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stty=$(stty -g)
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tty=$(ps -o tty= $$)
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case $tty in
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tty*) tty=${tty#tty}
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esac
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cfgdir=${XDG_CONFIG_HOME:-$HOME/.config}/sx
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datadir=${XDG_DATA_HOME:-$HOME/.local/share}/sx
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XAUTHORITY=${XAUTHORITY:-$cfgdir/xauthfile}
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mkdir -p "$cfgdir" "$datadir"
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trap 'cleanup "$pid"' EXIT
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touch "$XAUTHORITY"
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export XAUTHORITY
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xauth add :"$tty" MIT-MAGIC-COOKIE-1 "$(mcookie)"
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# Xorg will check if SIGUSR1 was set to SIG_IGN in its environment and issue
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# its own SIGUSR1 back to the parent process when it is ready to accept
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# connections. See Xserver(1).
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# We take advantage of this feature to launch our client directly from the
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# SIGUSR1 handler and avoid the need to poll for readiness.
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trap 'DISPLAY=:$tty "${@:-"$cfgdir"/sxrc}"' USR1
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(
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trap '' USR1
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exec /usr/lib/xorg-server/Xorg :"$tty" -keeptty vt"$tty" -noreset \
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-logfile "$datadir/$tty" -auth "$XAUTHORITY"
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) & pid=$!
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wait
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