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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.
my @lf;
sub usage {
my $e = shift @_;
$0 =~ s|.*/||;
print { $e ? STDERR : STDOUT } << "EOF";
Usage: $0 [OPTION]...
-F --first: Print only first available entry.
-t, --test: Go in test mode.
-l, --list: List window-managers.
-L: List window-managers including the order number
-d=DIR, --dir=DIR: Specifies a directory of w-m configuration files.
Default is /etc/X11/wmsession.d/
-x=ENTRY, --xsession=ENTRY: Produce window-managers script of ENTRY.
--generate=DIR: Produce window-manager .desktop files into DIR.
--wrap-sessions: Wrap window-managers with /usr/share/X11/xdm/Xsession.
-k, --kdm3: Shortcut for --generate=/opt/kde3/share/apps/kdm/sessions
-K, --kdm4: Shortcut for --generate=/usr/share/apps/kdm/sessions
-g, --gdm: Shortcut for --generate=/etc/X11/dm/Sessions --wrap-sessions
-h, --help: Produce this help.
EOF
exit($e);
}
sub cat { # returns content of argument file as a single string
my ($f) = @_;
local *F;
open F, $f or die "Can't open $f\n";
local $/ = "";
<F>
}
sub parse_file { # parse a session descriptor file
my ($fn) = @_;
$_ = cat ($fn);
($n = $1) =~ s| ||g if /^NAME=(.*)/m;
$e = $1 if /^EXEC=(.*)/m;
# $d = $1 if /^DESC=(.*)/m;
# $i = $1 if /^ICON=(.*)/m;
$s = $1 while /SCRIPT:(.*?)$/gs; chomp $s;
if (-x $e) { $script{$n} = $s; $exe{$n} = $e; push @lf, $n; ($order{$n}) = $fn =~ m/(^[0-9][0-9])/; }
# if (-x $e) { $script{$n} = $s; $exec{$n} = $e; $desc{$n} = $d; $icon{$n} = $i; push @lf, $n; }
}
sub gen_desktops {
my ($d, $usesession) = @_;
-d $d or system("mkdir -p $d");
system("rm -f $d/*");
for my $file (@lf) {
open FH, ">$d/$order{$file}$file.desktop" or die "Can't write to $d/$order{$file}.desktop\n";
print FH "[Desktop Entry]\n";
print FH "Encoding=UTF-8\n";
print FH "Name=$file\n";
print FH "Comment=$file\n";
print FH "TryExec=$exe{$file}\n" if $exe{$file};
if ($usesession) {
print FH "Exec=/usr/share/X11/xdm/Xsession $file\n";
} else {
print FH "Exec=$file\n";
}
print FH "Icon=\n";
print FH "Type=Application\n";
close FH;
chmod 0755, $file;
}
}
usage(1)
if @ARGV < 1;
while ($ARGV[0] =~ /^--/ || $ARGV[0] =~ /^-/) {
$_ = shift;
if (/^--xsession=([^ ]+)/ || /^-x=([^ ]+)/) {
$xsession = $1;
} elsif (/^--first/ || /^-F/) {
$first++;
} elsif (/^--generate=([^ ]+)/) {
$generate = $1;
} elsif (/^--wrap-sessions/) {
$wrap_sessions++;
} elsif (/^--gdm/ || /^-g/) {
die "You should be root to build gdm session\n" if $< != 0;
$gdm++;
} elsif (/^--list/ || /^-l/) {
$list++;
} elsif (/^-L/) {
$list_order++;
} elsif (/^--kdm3/ || /^-k/) {
$kdm3++;
} elsif (/^--kdm4/ || /^-K/) {
$kdm4++;
} 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
$dir = $test ? './wmsession.d/' : '/etc/X11/wmsession.d/' unless $dir;
chdir $dir;
for (<*>) {
next if /.*~/;
next if /.*\.rpm(save|old)/;
parse_file ("$_");
}
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$/i } @lf;
if ($generate) {
gen_desktops($generate, $wrap_sessions);
}
if ($kdm3) {
gen_desktops('/opt/kde3/share/apps/kdm/sessions', 0);
}
if ($kdm4) {
gen_desktops('/usr/share/apps/kdm/sessions', 0);
}
if ($gdm) {
gen_desktops('/etc/X11/dm/Sessions', 1);
}
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, 'default', 'failsafe'), "\n";
} else {
print "default\n";
}
} elsif ($list_order) {
print join(' ', map { "$_=$order{$_}" } @lf), "\n";
}
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