mirror of
https://github.com/golang/sys.git
synced 2026-02-09 12:16:04 +03:00
20acc5cf31
This CL copies to each package of go.sys the files from syscall it will need.
Different directories have different files, but these:
mkall.sh
str.go
syscall.go
mksyscall.pl
race.go
race0.go
syscall_test.go
are copied to all three.
No changes yet, these are just copies. They are not ready to use yet:
package names are wrong, for starters. But this clean copy will make
it easier to follow the changes as the packages are enabled.
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/126960043
37 lines
1.0 KiB
Go
37 lines
1.0 KiB
Go
// Copyright 2011 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.
|
|
|
|
// Socket control messages
|
|
|
|
package syscall
|
|
|
|
import "unsafe"
|
|
|
|
// UnixCredentials encodes credentials into a socket control message
|
|
// for sending to another process. This can be used for
|
|
// authentication.
|
|
func UnixCredentials(ucred *Ucred) []byte {
|
|
b := make([]byte, CmsgSpace(SizeofUcred))
|
|
h := (*Cmsghdr)(unsafe.Pointer(&b[0]))
|
|
h.Level = SOL_SOCKET
|
|
h.Type = SCM_CREDENTIALS
|
|
h.SetLen(CmsgLen(SizeofUcred))
|
|
*((*Ucred)(cmsgData(h))) = *ucred
|
|
return b
|
|
}
|
|
|
|
// ParseUnixCredentials decodes a socket control message that contains
|
|
// credentials in a Ucred structure. To receive such a message, the
|
|
// SO_PASSCRED option must be enabled on the socket.
|
|
func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
|
|
if m.Header.Level != SOL_SOCKET {
|
|
return nil, EINVAL
|
|
}
|
|
if m.Header.Type != SCM_CREDENTIALS {
|
|
return nil, EINVAL
|
|
}
|
|
ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))
|
|
return &ucred, nil
|
|
}
|