f8d9fa9e80
This upgrades all of libgo other than the runtime package to the Go 1.4 release. In Go 1.4 much of the runtime was rewritten into Go. Merging that code will take more time and will not change the API, so I'm putting it off for now. There are a few runtime changes anyhow, to accomodate other packages that rely on minor modifications to the runtime support. The compiler changes slightly to add a one-bit flag to each type descriptor kind that is stored directly in an interface, which for gccgo is currently only pointer types. Another one-bit flag (gcprog) is reserved because it is used by the gc compiler, but gccgo does not currently use it. There is another error check in the compiler since I ran across it during testing. gotools/: * Makefile.am (go_cmd_go_files): Sort entries. Add generate.go. * Makefile.in: Rebuild. From-SVN: r219627
74 lines
1.7 KiB
Go
74 lines
1.7 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd linux netbsd openbsd solaris
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// Read system port mappings from /etc/services
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package net
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import "sync"
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// services contains minimal mappings between services names and port
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// numbers for platforms that don't have a complete list of port numbers
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// (some Solaris distros).
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var services = map[string]map[string]int{
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"tcp": {"http": 80},
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}
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var servicesError error
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var onceReadServices sync.Once
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func readServices() {
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var file *file
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if file, servicesError = open("/etc/services"); servicesError != nil {
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return
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}
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for line, ok := file.readLine(); ok; line, ok = file.readLine() {
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// "http 80/tcp www www-http # World Wide Web HTTP"
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if i := byteIndex(line, '#'); i >= 0 {
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line = line[0:i]
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}
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f := getFields(line)
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if len(f) < 2 {
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continue
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}
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portnet := f[1] // "80/tcp"
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port, j, ok := dtoi(portnet, 0)
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if !ok || port <= 0 || j >= len(portnet) || portnet[j] != '/' {
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continue
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}
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netw := portnet[j+1:] // "tcp"
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m, ok1 := services[netw]
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if !ok1 {
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m = make(map[string]int)
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services[netw] = m
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}
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for i := 0; i < len(f); i++ {
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if i != 1 { // f[1] was port/net
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m[f[i]] = port
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}
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}
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}
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file.close()
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}
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// goLookupPort is the native Go implementation of LookupPort.
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func goLookupPort(network, service string) (port int, err error) {
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onceReadServices.Do(readServices)
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switch network {
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case "tcp4", "tcp6":
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network = "tcp"
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case "udp4", "udp6":
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network = "udp"
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}
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if m, ok := services[network]; ok {
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if port, ok = m[service]; ok {
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return
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}
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}
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return 0, &AddrError{"unknown port", network + "/" + service}
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}
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