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#!/bin/sh -e
# wmanager-loop -- loop running window managers chosen with wmanager
# Copyright (C) 2000 Tommi Virtanen <tv@debian.org>
# Copyright (C) 2008, 2009, 2020 Peter Pentchev <roam@ringlet.net>
# 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; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# Search .wmanagerrc for the WM specified by the user
check_wm()
{
local wm esc try
# A directly specified executable file
if [ -x "$1" ]; then
printf -- '%s\n' "$1"
return 0
fi
# No, we'll have to look through .wmanagerrc
if [ ! -r "$RC" ]; then
echo "Nonexistent or unreadable config file: $RC" 1>&2
return 1
fi
if expr "$1" : '.*[^A-Za-z0-9_/-]' > /dev/null; then
echo "Invalid characters in WM specification: $1" 1>&2
return 1
fi
wm="$1"
esc="$(printf -- '%s\n' "$1" | sed -e 's@/@\\\\/@g')"
# An exact match
try="$(awk -F= -v "wm=$wm" '$1 == wm {print $2}' "$RC")"
if [ -n "$try" ]; then
echo "$try"
return 0
fi
# An exact match for the program
try=`awk -F= '$2 ~ /\/'"$esc"'$/ {print $2}' "$RC"`
if [ -n "$try" ]; then
set -- $try
if [ "$#" -gt 1 ]; then
echo "Ambiguous WM specification '$wm': $@" 1>&2
return 1
fi
printf -- '%s\n' "$try"
return 0
fi
# A WM starting with the specified string
try="$(awk -F= '$2 ~ /\/'"$esc"'[^\/]*$/ {print $2}' "$RC")"
if [ -n "$try" ]; then
set -- $try
if [ "$#" -gt 1 ]; then
echo "Ambiguous WM specification '$wm': $@" 1>&2
return 1
fi
printf -- '%s\n' "$try"
return 0
fi
# A WM ending with the specified string
try="$(awk -F= '$2 ~ /'"$esc"'$/ {print $2}' "$RC")"
if [ -n "$try" ]; then
set -- $try
if [ "$#" -gt 1 ]; then
echo "Ambiguous WM specification '$wm': $@" 1>&2
return 1
fi
printf -- '%s\n' "$try"
return 0
fi
echo "Invalid WM specification '$wm'" 1>&2
return 1
}
RC="$HOME/.wmanagerrc"
if [ -n "$WM" ]; then
WM="$(check_wm "$WM")"
[ -n "$WM" ] || exit 1
fi
if [ -z "$WM" ] && [ -r "$RC" ]; then
WM="$(sed 's/^.*=//; q' "$RC")"
fi
if [ -z "$WMTERM" ]; then
WMTERM='xterm'
for prog in x-terminal-emulator urxvt rxvt xterm; do
WMCMD="$(command -v "$prog" || true)"
if [ -n "$WMCMD" ]; then
WMTERM="$WMCMD"
break
fi
done
fi
while [ "$WM" != "-1" ]; do
${WM:-"$WMTERM"} || true
WM="$(wmanager "$@" || true)"
done
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