forked from driskell/log-courier
/
transport_unix.go
78 lines (64 loc) · 1.98 KB
/
transport_unix.go
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// +build !windows
/*
* Copyright 2014-2015 Jason Woods.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package admin
import (
"fmt"
"net"
"os"
)
func init() {
registerTransport("unix", connectUnix, listenUnix)
}
type unixDialer struct {
uaddr *net.UnixAddr
}
func (d *unixDialer) Dial(network string, addr string) (net.Conn, error) {
return net.DialUnix("unix", nil, d.uaddr)
}
func (d *unixDialer) Host() string {
return "log-courier-address"
}
func connectUnix(transport, path string) (netDialer, error) {
uaddr, err := net.ResolveUnixAddr("unix", path)
if err != nil {
return nil, fmt.Errorf("The connection address specified is not valid: %s", err)
}
// TODO: Change umask to 111 so all can write (need to move to _unix)
// Permission will be controlled by folder permissions instead of file
dialer := &unixDialer{
uaddr: uaddr,
}
return dialer, nil
}
func listenUnix(transport, addr string) (netListener, error) {
uaddr, err := net.ResolveUnixAddr("unix", addr)
if err != nil {
return nil, fmt.Errorf("The admin bind address specified is not valid: %s", err)
}
// Remove previous socket file if it's still there or we'll get address
// already in use error
if _, err = os.Stat(addr); err == nil || !os.IsNotExist(err) {
if err := os.Remove(addr); err != nil && !os.IsNotExist(err) {
return nil, fmt.Errorf("Failed to remove the existing socket file: %s", err)
}
}
listener, err := net.ListenUnix("unix", uaddr)
if err != nil {
return nil, err
}
return listener, nil
}