mksysnum_freebsd.pl
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mksysnum_freebsd.pl
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	#!/usr/bin/env perl
	# Copyright 2009 The Go Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style
	# license that can be found in the LICENSE file.
	#
	# Generate system call table for FreeBSD from master list
	# (for example, /usr/src/sys/kern/syscalls.master).

	use strict;

	if($ENV{'GOARCH'} eq "" \|\| $ENV{'GOOS'} eq "") {
	print STDERR "GOARCH or GOOS not defined in environment\n";
	exit 1;
	}

	my $command = "mksysnum_freebsd.pl " . join(' ', @ARGV);

	print <<EOF;
	// $command
	// Code generated by the command above; see README.md. DO NOT EDIT.

	// +build $ENV{'GOARCH'},$ENV{'GOOS'}

	package unix

	const (
	EOF

	while(<>){
	if(/^([0-9]+)\s+\S+\s+(?:NO)?STD\s+({ \S+\s+(\w+).*)$/){
	my $num = $1;
	my $proto = $2;
	my $name = "SYS_$3";
	$name =~ y/a-z/A-Z/;

	# There are multiple entries for enosys and nosys, so comment them out.
	if($name =~ /^SYS_E?NOSYS$/){
	$name = "// $name";
	}
	if($name eq 'SYS_SYS_EXIT'){
	$name = 'SYS_EXIT';
	}

	print " $name = $num; // $proto\n";
	}
	}

	print <<EOF;
	)
	EOF