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#!/usr/bin/perl
# (c) Mandriva, Chmouel Boudjnah <chmouel@mandriva.com>
# Copyright under GPL blah blah blah.
## For info, see "chksession --help" or "man chksession"
# Modified by Bernard Lang on August 21, 2003.
# Modified by ns80 on February 12, 2016.
my (@lf, $dir, $first, $list, $list_order, %order, $test);
# Define multiple default paths for window-managers
my @dir_wm = qw(/usr/share/xsessions/ /usr/share/wayland-sessions/);
sub usage {
my $e = shift @_;
$0 =~ s|.*/||;
print { $e ? STDERR : STDOUT } << "EOF";
Usage: $0 [OPTION]...
-F --first: Print only first available entry.
-t, --test: Go in test mode.
-l, --list: List window-managers.
-L: List window-managers including the order number
-d=DIR, --dir=DIR: Specifies a directory of w-m configuration files.
Default is /usr/share/xsessions/
-x=ENTRY, --xsession=ENTRY: Produce window-managers script of ENTRY.
-h, --help: Produce this help.
EOF
exit($e);
}
sub cat { # returns content of argument file as a single string
my ($f) = @_;
open my $F, $f or die "Can't open $f\n";
local $/ = "";
<$F>;
}
sub parse_file { # parse a session descriptor file
my ($fn) = @_;
my $n;
local $_ = cat($fn);
($n = $1) =~ s| ||g if /^Name=(.*)/m;
my $e = $1 if /^Exec=(.*)/m;
$script{$n} = $e;
push @lf, $n;
($order{$n}) = $fn =~ m/(^[0-9][0-9])/;
}
usage(1)
if @ARGV < 1;
while ($ARGV[0] =~ /^--/ || $ARGV[0] =~ /^-/) {
local $_ = shift;
if (/^--xsession=([^ ]+)/ || /^-x=([^ ]+)/) {
$xsession = $1;
} elsif (/^--first/ || /^-F/) {
$first++;
} elsif (/^--list/ || /^-l/) {
$list++;
} elsif (/^-L/) {
$list_order++;
} elsif (/^--test/ || /^-t/) {
$test++;
} elsif (/^--dir=([^ ]+)/ || /^-d=([^ ]+)/) {
$dir = $1;
} elsif (/^--help/ || /^-h/ || /^-\?/) {
usage(0);
} else {
print STDERR "Unrecognized switch: $_\n";
usage(1);
}
}
# Parse all relevant files in session directory $dir
if ($test) {
$dir = './xsessions/';
}
if ($dir) {
@dir_wm = $dir;
}
foreach my $dir (@dir_wm) {
chdir($dir);
foreach (glob("*.desktop")) {
parse_file($_);
}
}
my ($e) = eval { cat("/etc/sysconfig/desktop") } =~ /DESKTOP=(\S+)/;
# The first string (without spaces) in the file is copied to $e.
# If $e is one of the names in @lf, then it is placed first (leftmost).
# Order of names in @lf is otherwise unchanged.
@lf = sort { $b =~ /^$e$/i <=> $a =~ /^$e$/i } @lf;
if ($xsession) {
if ($script{$xsession}) {
print "#!/bin/sh\n";
print $script{$xsession}
} else {
print "xterm -geometry 100x25+0+0 &\n";
if ( -x '/usr/bin/icewm' ) {
print "icewm\n";
} elsif ( -x '/usr/bin/twm' ) {
print "twm\n";
} else {
print "xterm -geometry 67x14+384+446\n";
}
}
exit (0);
}
@lf ? print shift @lf, "\n" : print "default\n"
if $first;
if ($list) {
if (@lf) {
print join(' ', @lf), "\n";
} else {
print "default\n";
}
} elsif ($list_order) {
print join(' ', map { "$_=$order{$_}" } @lf), "\n";
}
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