mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
98 lines
2.8 KiB
Go
98 lines
2.8 KiB
Go
![]() |
// Copyright 2012 Google Inc. All Rights Reserved.
|
||
|
//
|
||
|
// 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 main
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
"log"
|
||
|
"net"
|
||
|
"os"
|
||
|
"path/filepath"
|
||
|
"syscall"
|
||
|
)
|
||
|
|
||
|
// A Socket is a wrapper around a Unix socket that verifies directory
|
||
|
// permissions.
|
||
|
type Socket struct {
|
||
|
Dir string
|
||
|
}
|
||
|
|
||
|
func defaultDir() string {
|
||
|
sockPath := ".git-credential-cache"
|
||
|
if home := os.Getenv("HOME"); home != "" {
|
||
|
return filepath.Join(home, sockPath)
|
||
|
}
|
||
|
log.Printf("socket: cannot find HOME path. using relative directory %q for socket", sockPath)
|
||
|
return sockPath
|
||
|
}
|
||
|
|
||
|
// DefaultSocket is a Socket in the $HOME/.git-credential-cache directory.
|
||
|
var DefaultSocket = Socket{Dir: defaultDir()}
|
||
|
|
||
|
// Listen announces the local network address of the unix socket. The
|
||
|
// permissions on the socket directory are verified before attempting
|
||
|
// the actual listen.
|
||
|
func (s Socket) Listen() (net.Listener, error) {
|
||
|
network, addr := "unix", s.Path()
|
||
|
if err := s.mkdir(); err != nil {
|
||
|
return nil, &net.OpError{Op: "listen", Net: network, Addr: &net.UnixAddr{Name: addr, Net: network}, Err: err}
|
||
|
}
|
||
|
return net.Listen(network, addr)
|
||
|
}
|
||
|
|
||
|
// Dial connects to the unix socket. The permissions on the socket directory
|
||
|
// are verified before attempting the actual dial.
|
||
|
func (s Socket) Dial() (net.Conn, error) {
|
||
|
network, addr := "unix", s.Path()
|
||
|
if err := s.checkPermissions(); err != nil {
|
||
|
return nil, &net.OpError{Op: "dial", Net: network, Addr: &net.UnixAddr{Name: addr, Net: network}, Err: err}
|
||
|
}
|
||
|
return net.Dial(network, addr)
|
||
|
}
|
||
|
|
||
|
// Path returns the fully specified file name of the unix socket.
|
||
|
func (s Socket) Path() string {
|
||
|
return filepath.Join(s.Dir, "persistent-https-proxy-socket")
|
||
|
}
|
||
|
|
||
|
func (s Socket) mkdir() error {
|
||
|
if err := s.checkPermissions(); err == nil {
|
||
|
return nil
|
||
|
} else if !os.IsNotExist(err) {
|
||
|
return err
|
||
|
}
|
||
|
if err := os.MkdirAll(s.Dir, 0700); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
return s.checkPermissions()
|
||
|
}
|
||
|
|
||
|
func (s Socket) checkPermissions() error {
|
||
|
fi, err := os.Stat(s.Dir)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
if !fi.IsDir() {
|
||
|
return fmt.Errorf("socket: got file, want directory for %q", s.Dir)
|
||
|
}
|
||
|
if fi.Mode().Perm() != 0700 {
|
||
|
return fmt.Errorf("socket: got perm %o, want 700 for %q", fi.Mode().Perm(), s.Dir)
|
||
|
}
|
||
|
if st := fi.Sys().(*syscall.Stat_t); int(st.Uid) != os.Getuid() {
|
||
|
return fmt.Errorf("socket: got uid %d, want %d for %q", st.Uid, os.Getuid(), s.Dir)
|
||
|
}
|
||
|
return nil
|
||
|
}
|