mirror of
https://github.com/golang/go
synced 2024-10-04 20:21:22 -06:00
5611e8b59f
Before this patch the test would close the file descriptor but not the os.File. When the os.File was GC'ed, the finalizer would close the file descriptor again. That would cause problems if the same file descriptor were returned by a later call to open in another test. On my system: > GOGC=30 go test --- FAIL: TestPassFD (0.04 seconds) passfd_test.go:62: FileConn: dup: bad file descriptor FAIL R=golang-dev, rsc CC=golang-dev https://golang.org/cl/6776053
114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
// Copyright 2012 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.
|
|
|
|
// +build linux
|
|
|
|
package syscall_test
|
|
|
|
import (
|
|
"bytes"
|
|
"net"
|
|
"os"
|
|
"syscall"
|
|
"testing"
|
|
)
|
|
|
|
// TestSCMCredentials tests the sending and receiving of credentials
|
|
// (PID, UID, GID) in an ancillary message between two UNIX
|
|
// sockets. The SO_PASSCRED socket option is enabled on the sending
|
|
// socket for this to work.
|
|
func TestSCMCredentials(t *testing.T) {
|
|
fds, err := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM, 0)
|
|
if err != nil {
|
|
t.Fatalf("Socketpair: %v", err)
|
|
}
|
|
defer syscall.Close(fds[0])
|
|
defer syscall.Close(fds[1])
|
|
|
|
err = syscall.SetsockoptInt(fds[0], syscall.SOL_SOCKET, syscall.SO_PASSCRED, 1)
|
|
if err != nil {
|
|
t.Fatalf("SetsockoptInt: %v", err)
|
|
}
|
|
|
|
srvFile := os.NewFile(uintptr(fds[0]), "server")
|
|
defer srvFile.Close()
|
|
srv, err := net.FileConn(srvFile)
|
|
if err != nil {
|
|
t.Errorf("FileConn: %v", err)
|
|
return
|
|
}
|
|
defer srv.Close()
|
|
|
|
cliFile := os.NewFile(uintptr(fds[1]), "client")
|
|
defer cliFile.Close()
|
|
cli, err := net.FileConn(cliFile)
|
|
if err != nil {
|
|
t.Errorf("FileConn: %v", err)
|
|
return
|
|
}
|
|
defer cli.Close()
|
|
|
|
var ucred syscall.Ucred
|
|
if os.Getuid() != 0 {
|
|
ucred.Pid = int32(os.Getpid())
|
|
ucred.Uid = 0
|
|
ucred.Gid = 0
|
|
oob := syscall.UnixCredentials(&ucred)
|
|
_, _, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
|
|
if err.(*net.OpError).Err != syscall.EPERM {
|
|
t.Fatalf("WriteMsgUnix failed with %v, want EPERM", err)
|
|
}
|
|
}
|
|
|
|
ucred.Pid = int32(os.Getpid())
|
|
ucred.Uid = uint32(os.Getuid())
|
|
ucred.Gid = uint32(os.Getgid())
|
|
oob := syscall.UnixCredentials(&ucred)
|
|
|
|
// this is going to send a dummy byte
|
|
n, oobn, err := cli.(*net.UnixConn).WriteMsgUnix(nil, oob, nil)
|
|
if err != nil {
|
|
t.Fatalf("WriteMsgUnix: %v", err)
|
|
}
|
|
if n != 0 {
|
|
t.Fatalf("WriteMsgUnix n = %d, want 0", n)
|
|
}
|
|
if oobn != len(oob) {
|
|
t.Fatalf("WriteMsgUnix oobn = %d, want %d", oobn, len(oob))
|
|
}
|
|
|
|
oob2 := make([]byte, 10*len(oob))
|
|
n, oobn2, flags, _, err := srv.(*net.UnixConn).ReadMsgUnix(nil, oob2)
|
|
if err != nil {
|
|
t.Fatalf("ReadMsgUnix: %v", err)
|
|
}
|
|
if flags != 0 {
|
|
t.Fatalf("ReadMsgUnix flags = 0x%x, want 0", flags)
|
|
}
|
|
if n != 1 {
|
|
t.Fatalf("ReadMsgUnix n = %d, want 1 (dummy byte)", n)
|
|
}
|
|
if oobn2 != oobn {
|
|
// without SO_PASSCRED set on the socket, ReadMsgUnix will
|
|
// return zero oob bytes
|
|
t.Fatalf("ReadMsgUnix oobn = %d, want %d", oobn2, oobn)
|
|
}
|
|
oob2 = oob2[:oobn2]
|
|
if !bytes.Equal(oob, oob2) {
|
|
t.Fatal("ReadMsgUnix oob bytes don't match")
|
|
}
|
|
|
|
scm, err := syscall.ParseSocketControlMessage(oob2)
|
|
if err != nil {
|
|
t.Fatalf("ParseSocketControlMessage: %v", err)
|
|
}
|
|
newUcred, err := syscall.ParseUnixCredentials(&scm[0])
|
|
if err != nil {
|
|
t.Fatalf("ParseUnixCredentials: %v", err)
|
|
}
|
|
if *newUcred != ucred {
|
|
t.Fatalf("ParseUnixCredentials = %+v, want %+v", newUcred, ucred)
|
|
}
|
|
}
|