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58510024be
BIRD uses hacked LinuxDocTools for building documentation, keeping some parts locally and using remaining parts from system-installed one. This setup breaks when LinuxDocTools makes some internal changes and is hard to keep consistent. Just include full LinuxDocTools code (both hacked and unmodified parts) to avoid consistency issues. Note that we still need some binaries from LinuxDocTools, so it still needs to be installed to build documentation.
393 lines
7.7 KiB
Perl
393 lines
7.7 KiB
Perl
#
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# Utils.pm
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#
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# $Id: Utils.pm,v 1.2 2001/08/31 22:39:44 sano Exp $
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#
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# Utilities, split off from other modules in order to cut down file size.
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#
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# © Copyright 1996, 1997, Cees de Groot
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#
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package LinuxDocTools::Utils;
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use strict;
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=head1 NAME
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LinuxDocTools::Utils - various supporting routines
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=head1 SYNOPSIS
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@files = process_options (@args);
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usage ($msg);
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trap_signals;
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cleanup;
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create_temp($tempfile)
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=head1 DESCRIPTION
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The B<LinuxDocTools::Utils> module contains a number of generic routines, mainly
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split off from the main module in order to keep file size down.
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=head1 FUNCTIONS
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=over 4
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=cut
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use DirHandle;
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use FileHandle;
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use Cwd;
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use File::Basename;
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use Exporter;
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use LinuxDocTools::Vars;
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use vars qw($VERSION @ISA @EXPORT @EXPORT_OK $in_signal);
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@ISA = qw(Exporter);
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@EXPORT = qw(usage process_options);
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@EXPORT_OK = qw(cleanup trap_signals remove_tmpfiles create_temp);
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$VERSION = sprintf("%d.%02d", q$Revision: 1.2 $ =~ /(\d+)\.(\d+)/);
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use subs qw(usage);
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# check whether options are unique
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sub check_option_consistency
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{
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my $owner = {};
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my ($fmt, $opt);
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foreach $fmt (keys %FmtList)
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{
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my $add = sub { # add to options of $fmt
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my $str = shift;
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if ($owner->{$str}) {
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push(@{$owner->{$str}}, $fmt);
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}
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else {
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$owner->{$str} = [$fmt];
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}
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};
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foreach $opt (@{$Formats{$fmt}{OPTIONS}})
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{
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&$add("--$opt->{option}");
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&$add("-$opt->{short}");
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}
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}
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my $error = 0;
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foreach $opt (keys %$owner)
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{
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if (scalar @{$owner->{$opt}} > 1)
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{
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warn "duplicate option: $opt in " .
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join(', ', @{$owner->{$opt}}) . "\n";
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$error = 1;
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}
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}
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die "Internal error detected" if $error;
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}
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=item process_options
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This function processes the command line, and sets the variables associated
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with the options along the way. When successful, it returns the arguments
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on the command line it didn't interpret. Normally, this will be a list of
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filenames.
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=cut
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sub process_options
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{
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my @args = @_;
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my @retval;
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OPTPROC: while ($args[0])
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{
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my $long;
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my $curarg = $args[0];
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if ($curarg =~ /^--.*/)
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{
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#
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# Long option, --opt[==value]
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#
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$long = 1;
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}
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elsif ($curarg =~ /^-.*/)
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{
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#
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# Short option, -o value
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#
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$long = 0;
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}
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else
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{
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#
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# Filename
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#
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push @retval, $curarg;
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next OPTPROC;
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}
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#
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# Start looking for the option
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#
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foreach my $fmt (keys %FmtList)
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{
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foreach my $opt (@{$Formats{$fmt}{OPTIONS}})
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{
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if (($long && $curarg =~ /^--$opt->{option}.*/) ||
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$curarg =~ /^-$opt->{short}/)
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{
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#
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# Found it! Get the argument and see whether all is OK
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# with the option.
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#
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my $optval = "";
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if ($long)
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{
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if ($curarg =~ /^--$opt->{option}=.*/)
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{
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$optval = $curarg;
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$optval =~ s/[^=]*=(.*)/$1/;
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}
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}
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else
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{
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if ($args[1] =~ /^[^-].*/)
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{
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$optval = $args[1];
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}
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}
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$opt->{type} eq "f" && do
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{
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#
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# "f" -> flag. Increment, so '-v -v' can work.
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#
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$Formats{$fmt}{$opt->{option}} += 1;
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next OPTPROC;
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};
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#
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# All other types require a value (for now).
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#
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shift @args unless $long;
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if ($optval eq "")
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{
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usage "Option $curarg: value required";
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}
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($opt->{type} eq "i" || $opt->{type} eq "s") && do
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{
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#
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# "i" -> numeric value.
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# "s" -> string value.
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#
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# No type checking yet...
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#
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if ($opt->{option} eq "define")
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{
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$Formats{$fmt}{$opt->{option}} .= " " . $optval;
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}
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else
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{
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$Formats{$fmt}{$opt->{option}} = $optval;
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}
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next OPTPROC;
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};
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$opt->{type} eq "l" && do
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{
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#
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# "l" -> list of values.
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#
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foreach my $val (@{$opt->{'values'}})
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{
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if ($val eq $optval)
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{
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$Formats{$fmt}{$opt->{option}} = $optval;
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next OPTPROC;
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}
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}
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usage "Invalid value '$optval' for '--$opt->{option}'";
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};
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usage "Unknown option type $opt->{type} in $fmt/$opt";
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}
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}
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}
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usage "Unknown option $curarg";
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}
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continue
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{
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shift @args;
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}
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return @retval;
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}
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=item usage
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Prints out a generated help message about calling convention and allowed
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options, then the argument string, and finally exits.
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=cut
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sub usage
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{
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my ($msg) = @_;
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print "LinuxDoc-Tools version " . `cat $main::DataDir/VERSION` . "\n";
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check_option_consistency;
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print "Usage:\n";
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print " " . $global->{myname} . " [options] <infile>\n\n";
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my @helplist = sort(keys %Formats);
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@helplist = sort (keys %FmtList) if ($global->{format});
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foreach my $fmt (@helplist)
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{
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if ($fmt eq "global")
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{
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print "General options:\n";
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}
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else
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{
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print "Format: " . $fmt . "\n";
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}
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print $Formats{$fmt}{HELP};
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for my $opt (@{$Formats{$fmt}{OPTIONS}})
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{
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my $value = '';
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if ($opt->{type} eq "i")
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{
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$value = "number";
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}
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elsif ($opt->{type} eq "l")
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{
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$value = "{";
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my $first = 1;
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for my $val (@{$opt->{'values'}})
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{
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$first || ($value .= ",");
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$first = 0;
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$value .= $val;
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}
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$value .= "}";
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}
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elsif ($opt->{type} eq "s")
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{
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$value = "string";
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}
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print " --$opt->{option}"; print "=$value" if $value;
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print " -$opt->{short}"; print " $value" if $value;
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print "\n";
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}
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print "\n";
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}
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$msg && print "Error: $msg\n\n";
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exit 1;
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}
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=item cleanup
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This function cleans out all temporary files and exits. The unlink step
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is skipped if debugging is turned on.
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=cut
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sub cleanup
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{
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my ($signame) = @_;
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if( $signame ) {
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if ( $in_signal ) {
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if( $global->{debug} ) {
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print STDERR "Caught SIG$signame during cleanup -- aborting\n";
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}
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exit -1;
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}
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else {
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if( $global->{debug} ) {
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print STDERR "Caught SIG$signame -- cleaning up\n";
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}
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$in_signal = 1;
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}
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}
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if( !$global->{debug} && $global->{tmpbase} ) {
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remove_tmpfiles($global->{tmpbase});
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}
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exit 0;
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}
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=item remove_tmpfiles( $tmpbase )
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This function cleans out all temporary files, using the argument $tmpbase to
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determine the directory and pattern to use to find the temporary files.
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=cut
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sub remove_tmpfiles($) {
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my $tmpbase = shift;
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my ($name,$tmpdir) = fileparse($tmpbase,"");
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my $namelength = length $name;
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my $savdir = cwd;
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chdir($tmpdir);
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my $dir = new DirHandle(".");
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if (!defined($dir) ) {
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warn "Couldn't open temp directory $tmpdir: $!\n";
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} else {
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foreach my $tmpfile ($dir->read()) {
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if (substr ($tmpfile, 0, $namelength) eq $name) {
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unlink ($tmpfile) || warn "Couldn't unlink $tmpfile: $! \n";
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}
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}
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$dir->close();
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}
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chdir($savdir);
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rmdir($tmpdir) || return -1;
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}
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=item trap_signals
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This function traps all known signals, making sure that the B<cleanup>
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function is executed on them. It should be called once at initialization
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time.
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=cut
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sub trap_signals
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{
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foreach my $sig ( 'HUP', 'INT', 'QUIT', 'ILL',
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'TRAP', 'IOT', 'BUS', 'FPE',
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'USR1', 'SEGV', 'USR2',
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'PIPE', 'ALRM', 'TERM', )
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{
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$SIG{$sig} = \&cleanup;
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}
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}
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=item create_temp ( $tmpfile )
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This function creates an empty temporary file with the required
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permission for security reasons.
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=cut
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sub create_temp($) {
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my $tmpnam = shift;
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my $fh = new FileHandle($tmpnam,O_CREAT|O_EXCL|O_WRONLY,0600);
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$fh or die "$0: failed to create temporary file: $!";
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$fh->close;
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}
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=back
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=head1 AUTHOR
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Cees de Groot, C<E<lt>cg@pobox.comE<gt>>.
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=cut
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1;
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