mirror of
https://gitee.com/gitea/gitea
synced 2025-11-04 16:40:24 +08:00
395 lines
9.7 KiB
Go
395 lines
9.7 KiB
Go
// Copyright 2009 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 aix darwin dragonfly freebsd linux netbsd openbsd solaris
|
|
|
|
package unix
|
|
|
|
import (
|
|
"bytes"
|
|
"runtime"
|
|
"sort"
|
|
"sync"
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
var (
|
|
Stdin = 0
|
|
Stdout = 1
|
|
Stderr = 2
|
|
)
|
|
|
|
const (
|
|
darwin64Bit = runtime.GOOS == "darwin" && SizeofPtr == 8
|
|
dragonfly64Bit = runtime.GOOS == "dragonfly" && SizeofPtr == 8
|
|
netbsd32Bit = runtime.GOOS == "netbsd" && SizeofPtr == 4
|
|
solaris64Bit = runtime.GOOS == "solaris" && SizeofPtr == 8
|
|
)
|
|
|
|
// Do the interface allocations only once for common
|
|
// Errno values.
|
|
var (
|
|
errEAGAIN error = syscall.EAGAIN
|
|
errEINVAL error = syscall.EINVAL
|
|
errENOENT error = syscall.ENOENT
|
|
)
|
|
|
|
// errnoErr returns common boxed Errno values, to prevent
|
|
// allocations at runtime.
|
|
func errnoErr(e syscall.Errno) error {
|
|
switch e {
|
|
case 0:
|
|
return nil
|
|
case EAGAIN:
|
|
return errEAGAIN
|
|
case EINVAL:
|
|
return errEINVAL
|
|
case ENOENT:
|
|
return errENOENT
|
|
}
|
|
return e
|
|
}
|
|
|
|
// ErrnoName returns the error name for error number e.
|
|
func ErrnoName(e syscall.Errno) string {
|
|
i := sort.Search(len(errorList), func(i int) bool {
|
|
return errorList[i].num >= e
|
|
})
|
|
if i < len(errorList) && errorList[i].num == e {
|
|
return errorList[i].name
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// SignalName returns the signal name for signal number s.
|
|
func SignalName(s syscall.Signal) string {
|
|
i := sort.Search(len(signalList), func(i int) bool {
|
|
return signalList[i].num >= s
|
|
})
|
|
if i < len(signalList) && signalList[i].num == s {
|
|
return signalList[i].name
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte.
|
|
func clen(n []byte) int {
|
|
i := bytes.IndexByte(n, 0)
|
|
if i == -1 {
|
|
i = len(n)
|
|
}
|
|
return i
|
|
}
|
|
|
|
// Mmap manager, for use by operating system-specific implementations.
|
|
|
|
type mmapper struct {
|
|
sync.Mutex
|
|
active map[*byte][]byte // active mappings; key is last byte in mapping
|
|
mmap func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error)
|
|
munmap func(addr uintptr, length uintptr) error
|
|
}
|
|
|
|
func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
|
|
if length <= 0 {
|
|
return nil, EINVAL
|
|
}
|
|
|
|
// Map the requested memory.
|
|
addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset)
|
|
if errno != nil {
|
|
return nil, errno
|
|
}
|
|
|
|
// Slice memory layout
|
|
var sl = struct {
|
|
addr uintptr
|
|
len int
|
|
cap int
|
|
}{addr, length, length}
|
|
|
|
// Use unsafe to turn sl into a []byte.
|
|
b := *(*[]byte)(unsafe.Pointer(&sl))
|
|
|
|
// Register mapping in m and return it.
|
|
p := &b[cap(b)-1]
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
m.active[p] = b
|
|
return b, nil
|
|
}
|
|
|
|
func (m *mmapper) Munmap(data []byte) (err error) {
|
|
if len(data) == 0 || len(data) != cap(data) {
|
|
return EINVAL
|
|
}
|
|
|
|
// Find the base of the mapping.
|
|
p := &data[cap(data)-1]
|
|
m.Lock()
|
|
defer m.Unlock()
|
|
b := m.active[p]
|
|
if b == nil || &b[0] != &data[0] {
|
|
return EINVAL
|
|
}
|
|
|
|
// Unmap the memory and update m.
|
|
if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != nil {
|
|
return errno
|
|
}
|
|
delete(m.active, p)
|
|
return nil
|
|
}
|
|
|
|
func Read(fd int, p []byte) (n int, err error) {
|
|
n, err = read(fd, p)
|
|
if raceenabled {
|
|
if n > 0 {
|
|
raceWriteRange(unsafe.Pointer(&p[0]), n)
|
|
}
|
|
if err == nil {
|
|
raceAcquire(unsafe.Pointer(&ioSync))
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func Write(fd int, p []byte) (n int, err error) {
|
|
if raceenabled {
|
|
raceReleaseMerge(unsafe.Pointer(&ioSync))
|
|
}
|
|
n, err = write(fd, p)
|
|
if raceenabled && n > 0 {
|
|
raceReadRange(unsafe.Pointer(&p[0]), n)
|
|
}
|
|
return
|
|
}
|
|
|
|
// For testing: clients can set this flag to force
|
|
// creation of IPv6 sockets to return EAFNOSUPPORT.
|
|
var SocketDisableIPv6 bool
|
|
|
|
// Sockaddr represents a socket address.
|
|
type Sockaddr interface {
|
|
sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs
|
|
}
|
|
|
|
// SockaddrInet4 implements the Sockaddr interface for AF_INET type sockets.
|
|
type SockaddrInet4 struct {
|
|
Port int
|
|
Addr [4]byte
|
|
raw RawSockaddrInet4
|
|
}
|
|
|
|
// SockaddrInet6 implements the Sockaddr interface for AF_INET6 type sockets.
|
|
type SockaddrInet6 struct {
|
|
Port int
|
|
ZoneId uint32
|
|
Addr [16]byte
|
|
raw RawSockaddrInet6
|
|
}
|
|
|
|
// SockaddrUnix implements the Sockaddr interface for AF_UNIX type sockets.
|
|
type SockaddrUnix struct {
|
|
Name string
|
|
raw RawSockaddrUnix
|
|
}
|
|
|
|
func Bind(fd int, sa Sockaddr) (err error) {
|
|
ptr, n, err := sa.sockaddr()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return bind(fd, ptr, n)
|
|
}
|
|
|
|
func Connect(fd int, sa Sockaddr) (err error) {
|
|
ptr, n, err := sa.sockaddr()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return connect(fd, ptr, n)
|
|
}
|
|
|
|
func Getpeername(fd int) (sa Sockaddr, err error) {
|
|
var rsa RawSockaddrAny
|
|
var len _Socklen = SizeofSockaddrAny
|
|
if err = getpeername(fd, &rsa, &len); err != nil {
|
|
return
|
|
}
|
|
return anyToSockaddr(fd, &rsa)
|
|
}
|
|
|
|
func GetsockoptByte(fd, level, opt int) (value byte, err error) {
|
|
var n byte
|
|
vallen := _Socklen(1)
|
|
err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen)
|
|
return n, err
|
|
}
|
|
|
|
func GetsockoptInt(fd, level, opt int) (value int, err error) {
|
|
var n int32
|
|
vallen := _Socklen(4)
|
|
err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen)
|
|
return int(n), err
|
|
}
|
|
|
|
func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) {
|
|
vallen := _Socklen(4)
|
|
err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen)
|
|
return value, err
|
|
}
|
|
|
|
func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) {
|
|
var value IPMreq
|
|
vallen := _Socklen(SizeofIPMreq)
|
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
|
|
return &value, err
|
|
}
|
|
|
|
func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) {
|
|
var value IPv6Mreq
|
|
vallen := _Socklen(SizeofIPv6Mreq)
|
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
|
|
return &value, err
|
|
}
|
|
|
|
func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) {
|
|
var value IPv6MTUInfo
|
|
vallen := _Socklen(SizeofIPv6MTUInfo)
|
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
|
|
return &value, err
|
|
}
|
|
|
|
func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) {
|
|
var value ICMPv6Filter
|
|
vallen := _Socklen(SizeofICMPv6Filter)
|
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
|
|
return &value, err
|
|
}
|
|
|
|
func GetsockoptLinger(fd, level, opt int) (*Linger, error) {
|
|
var linger Linger
|
|
vallen := _Socklen(SizeofLinger)
|
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&linger), &vallen)
|
|
return &linger, err
|
|
}
|
|
|
|
func GetsockoptTimeval(fd, level, opt int) (*Timeval, error) {
|
|
var tv Timeval
|
|
vallen := _Socklen(unsafe.Sizeof(tv))
|
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&tv), &vallen)
|
|
return &tv, err
|
|
}
|
|
|
|
func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) {
|
|
var rsa RawSockaddrAny
|
|
var len _Socklen = SizeofSockaddrAny
|
|
if n, err = recvfrom(fd, p, flags, &rsa, &len); err != nil {
|
|
return
|
|
}
|
|
if rsa.Addr.Family != AF_UNSPEC {
|
|
from, err = anyToSockaddr(fd, &rsa)
|
|
}
|
|
return
|
|
}
|
|
|
|
func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) {
|
|
ptr, n, err := to.sockaddr()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return sendto(fd, p, flags, ptr, n)
|
|
}
|
|
|
|
func SetsockoptByte(fd, level, opt int, value byte) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(&value), 1)
|
|
}
|
|
|
|
func SetsockoptInt(fd, level, opt int, value int) (err error) {
|
|
var n = int32(value)
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(&n), 4)
|
|
}
|
|
|
|
func SetsockoptInet4Addr(fd, level, opt int, value [4]byte) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(&value[0]), 4)
|
|
}
|
|
|
|
func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreq)
|
|
}
|
|
|
|
func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPv6Mreq)
|
|
}
|
|
|
|
func SetsockoptICMPv6Filter(fd, level, opt int, filter *ICMPv6Filter) error {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(filter), SizeofICMPv6Filter)
|
|
}
|
|
|
|
func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(l), SizeofLinger)
|
|
}
|
|
|
|
func SetsockoptString(fd, level, opt int, s string) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(&[]byte(s)[0]), uintptr(len(s)))
|
|
}
|
|
|
|
func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) {
|
|
return setsockopt(fd, level, opt, unsafe.Pointer(tv), unsafe.Sizeof(*tv))
|
|
}
|
|
|
|
func Socket(domain, typ, proto int) (fd int, err error) {
|
|
if domain == AF_INET6 && SocketDisableIPv6 {
|
|
return -1, EAFNOSUPPORT
|
|
}
|
|
fd, err = socket(domain, typ, proto)
|
|
return
|
|
}
|
|
|
|
func Socketpair(domain, typ, proto int) (fd [2]int, err error) {
|
|
var fdx [2]int32
|
|
err = socketpair(domain, typ, proto, &fdx)
|
|
if err == nil {
|
|
fd[0] = int(fdx[0])
|
|
fd[1] = int(fdx[1])
|
|
}
|
|
return
|
|
}
|
|
|
|
func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
|
|
if raceenabled {
|
|
raceReleaseMerge(unsafe.Pointer(&ioSync))
|
|
}
|
|
return sendfile(outfd, infd, offset, count)
|
|
}
|
|
|
|
var ioSync int64
|
|
|
|
func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) }
|
|
|
|
func SetNonblock(fd int, nonblocking bool) (err error) {
|
|
flag, err := fcntl(fd, F_GETFL, 0)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if nonblocking {
|
|
flag |= O_NONBLOCK
|
|
} else {
|
|
flag &= ^O_NONBLOCK
|
|
}
|
|
_, err = fcntl(fd, F_SETFL, flag)
|
|
return err
|
|
}
|
|
|
|
// Exec calls execve(2), which replaces the calling executable in the process
|
|
// tree. argv0 should be the full path to an executable ("/bin/ls") and the
|
|
// executable name should also be the first argument in argv (["ls", "-l"]).
|
|
// envv are the environment variables that should be passed to the new
|
|
// process (["USER=go", "PWD=/tmp"]).
|
|
func Exec(argv0 string, argv []string, envv []string) error {
|
|
return syscall.Exec(argv0, argv, envv)
|
|
}
|