//go:build dragonfly || freebsd || linux || netbsd || openbsd || solaris

package syscall

import "sync"

// forkExecPipe atomically opens a pipe with O_CLOEXEC set on both file
// descriptors.
func forkExecPipe(p []int) error {
	return Pipe2(p, O_CLOEXEC)
}

var (
	// Guard the forking variable.
	forkingLock sync.Mutex
	// Number of goroutines currently forking, and thus the

	EFAULT    = C.EFAULT
	EBUSY     = C.EBUSY
	EAGAIN    = C.EAGAIN
	ETIMEDOUT = C.ETIMEDOUT

	O_WRONLY   = C.O_WRONLY
	O_NONBLOCK = C.O_NONBLOCK
	O_CREAT    = C.O_CREAT
	O_TRUNC    = C.O_TRUNC
	O_CLOEXEC  = C.O_CLOEXEC

	PROT_NONE  = C.PROT_NONE
	PROT_READ  = C.PROT_READ
	PROT_WRITE = C.PROT_WRITE
	PROT_EXEC  = C.PROT_EXEC

	MAP_ANON    = C.MAP_ANON
	MAP_PRIVATE = C.MAP_PRIVATE
	MAP_FIXED   = C.MAP_FIXED

#include <pthread.h>
#include <signal.h>
*/
import "C"

const (
	EINTR     = C.EINTR
	EFAULT    = C.EFAULT
	EAGAIN    = C.EAGAIN
	ETIMEDOUT = C.ETIMEDOUT

	O_NONBLOCK = C.O_NONBLOCK
	O_CLOEXEC  = C.O_CLOEXEC

	PROT_NONE  = C.PROT_NONE
	PROT_READ  = C.PROT_READ
	PROT_WRITE = C.PROT_WRITE
	PROT_EXEC  = C.PROT_EXEC

	MAP_ANON    = C.MAP_ANON
	MAP_PRIVATE = C.MAP_PRIVATE
	MAP_FIXED   = C.MAP_FIXED

// Pipe returns a connected pair of Files; reads from r return bytes written to w.
// It returns the files and an error, if any.
func Pipe() (r *File, w *File, err error) {
	var p [2]int

	e := syscall.Pipe2(p[0:], syscall.O_CLOEXEC)
	if e != nil {
		return nil, nil, NewSyscallError("pipe2", e)
	}

	return newFile(p[0], "|0", kindPipe, false), newFile(p[1], "|1", kindPipe, false), nil

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build wasip1

package os

// supportsCloseOnExec reports whether the platform supports the
// O_CLOEXEC flag.

*/
import "C"

const (
	EINTR  = C.EINTR
	EFAULT = C.EFAULT
	EAGAIN = C.EAGAIN

	O_WRONLY   = C.O_WRONLY
	O_NONBLOCK = C.O_NONBLOCK
	O_CREAT    = C.O_CREAT
	O_TRUNC    = C.O_TRUNC
	O_CLOEXEC  = C.O_CLOEXEC

	PROT_NONE  = C.PROT_NONE
	PROT_READ  = C.PROT_READ
	PROT_WRITE = C.PROT_WRITE
	PROT_EXEC  = C.PROT_EXEC

	MAP_ANON    = C.MAP_ANON
	MAP_PRIVATE = C.MAP_PRIVATE
	MAP_FIXED   = C.MAP_FIXED

	SEGV_MAPERR = C.SEGV_MAPERR
	SEGV_ACCERR = C.SEGV_ACCERR

	ITIMER_REAL    = C.ITIMER_REAL
	ITIMER_VIRTUAL = C.ITIMER_VIRTUAL
	ITIMER_PROF    = C.ITIMER_PROF

	O_RDONLY  = C.O_RDONLY
	O_CLOEXEC = C.O_CLOEXEC
)

type Fpreg C.struct__fpreg
type Fpxreg C.struct__fpxreg
type Xmmreg C.struct__xmmreg
type Fpstate C.struct__fpstate
type Timespec C.struct_timespec
type Timeval C.struct_timeval

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build aix || darwin

package syscall

// forkExecPipe opens a pipe and non-atomically sets O_CLOEXEC on both file
// descriptors.
func forkExecPipe(p []int) error {
	err := Pipe(p)
	if err != nil {
		return err
	}
	_, err = fcntl(p[0], F_SETFD, FD_CLOEXEC)
	if err != nil {
		return err
	}

	FORK_WAITPID   = C.FORK_WAITPID

	MAXHOSTNAMELEN = C.MAXHOSTNAMELEN

	O_WRONLY   = C.O_WRONLY
	O_NONBLOCK = C.O_NONBLOCK
	O_CREAT    = C.O_CREAT
	O_TRUNC    = C.O_TRUNC
	O_CLOEXEC  = C.O_CLOEXEC

	POLLIN  = C.POLLIN
	POLLOUT = C.POLLOUT
	POLLHUP = C.POLLHUP
	POLLERR = C.POLLERR

	PORT_SOURCE_FD    = C.PORT_SOURCE_FD
	PORT_SOURCE_ALERT = C.PORT_SOURCE_ALERT

const (
	EINTR     = C.EINTR
	EFAULT    = C.EFAULT
	EAGAIN    = C.EAGAIN
	ETIMEDOUT = C.ETIMEDOUT

	O_WRONLY   = C.O_WRONLY
	O_NONBLOCK = C.O_NONBLOCK
	O_CREAT    = C.O_CREAT
	O_TRUNC    = C.O_TRUNC
	O_CLOEXEC  = C.O_CLOEXEC

	PROT_NONE  = C.PROT_NONE
	PROT_READ  = C.PROT_READ
	PROT_WRITE = C.PROT_WRITE
	PROT_EXEC  = C.PROT_EXEC

	MAP_ANON    = C.MAP_ANON
	MAP_SHARED  = C.MAP_SHARED
	MAP_PRIVATE = C.MAP_PRIVATE