// Copyright 2019 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.

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

package main

import (
	"bytes"
	"cmd/internal/buildid"
	"cmd/internal/notsha256"
	"cmd/link/internal/ld"
	"debug/elf"
	"fmt"
	"internal/platform"
	"internal/testenv"
	"os"
	"os/exec"
	"path/filepath"

		case "darwin", "ios", "dragonfly", "freebsd", "netbsd", "openbsd":
			var st syscall.Stat_t
			err := ignoringEINTR(func() error {
				return syscall.Fstat(fd, &st)
			})
			typ := st.Mode & syscall.S_IFMT
			// Don't try to use kqueue with regular files on *BSDs.
			// On FreeBSD a regular file is always
			// reported as ready for writing.
			// On Dragonfly, NetBSD and OpenBSD the fd is signaled

// timeoutUpperBound returns the maximum time that we expect a timeout of
// duration d to take to return the caller.
func timeoutUpperBound(d time.Duration) time.Duration {
	switch runtime.GOOS {
	case "openbsd", "netbsd":
		// NetBSD and OpenBSD seem to be unable to reliably hit deadlines even when
		// the absolute durations are long.
		// In https://build.golang.org/log/c34f8685d020b98377dd4988cd38f0c5bd72267e,

// go run mksysnum.go http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master
// Code generated by the command above; DO NOT EDIT.

//go:build arm64 && netbsd

package unix

const (
	SYS_EXIT                 = 1   // { void|sys||exit(int rval); }
	SYS_FORK                 = 2   // { int|sys||fork(void); }
	SYS_READ                 = 3   // { ssize_t|sys||read(int fd, void *buf, size_t nbyte); }

// mksyscall.pl -l32 -netbsd -tags netbsd,386 syscall_bsd.go syscall_netbsd.go syscall_netbsd_386.go
// Code generated by the command above; DO NOT EDIT.

//go:build netbsd && 386

package syscall

import "unsafe"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
	r0, _, e1 := RawSyscall(SYS_GETGROUPS, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
	n = int(r0)

// go run mksysnum.go http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build amd64 && netbsd

package unix

const (
	SYS_EXIT                 = 1   // { void|sys||exit(int rval); }
	SYS_FORK                 = 2   // { int|sys||fork(void); }
	SYS_READ                 = 3   // { ssize_t|sys||read(int fd, void *buf, size_t nbyte); }

// go run mksysnum.go http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build arm && netbsd

package unix

const (
	SYS_EXIT                 = 1   // { void|sys||exit(int rval); }
	SYS_FORK                 = 2   // { int|sys||fork(void); }
	SYS_READ                 = 3   // { ssize_t|sys||read(int fd, void *buf, size_t nbyte); }

// go run mksysnum.go http://cvsweb.netbsd.org/bsdweb.cgi/~checkout~/src/sys/kern/syscalls.master
// Code generated by the command above; see README.md. DO NOT EDIT.

//go:build 386 && netbsd

package unix

const (
	SYS_EXIT                 = 1   // { void|sys||exit(int rval); }
	SYS_FORK                 = 2   // { int|sys||fork(void); }
	SYS_READ                 = 3   // { ssize_t|sys||read(int fd, void *buf, size_t nbyte); }

var trailingPort = regexp.MustCompile(`:([0-9]+)$`)

var osDefaultInheritEnv = func() []string {
	switch runtime.GOOS {
	case "darwin", "ios":
		return []string{"DYLD_LIBRARY_PATH"}
	case "android", "linux", "freebsd", "netbsd", "openbsd":
		return []string{"LD_LIBRARY_PATH"}
	case "hpux":
		return []string{"LD_LIBRARY_PATH", "SHLIB_PATH"}
	case "irix":
		return []string{"LD_LIBRARY_PATH", "LD_LIBRARYN32_PATH", "LD_LIBRARY64_PATH"}

// mksyscall.pl -l32 -netbsd -arm -tags netbsd,arm syscall_bsd.go syscall_netbsd.go syscall_netbsd_arm.go
// Code generated by the command above; DO NOT EDIT.

//go:build netbsd && arm

package syscall

import "unsafe"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
	r0, _, e1 := RawSyscall(SYS_GETGROUPS, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
	n = int(r0)