// void cfunc() {} // uses cgo_topofstack

import (
	"reflect"
	"strings"

	"testplugin/common"
)

func init() {
	_ = strings.NewReplacer() // trigger stack unwind, Issue #18190.
	C.strerror(C.EIO)         // uses cgo_topofstack
	common.X = 2
}

type sameNameReusedInPlugins struct {
	X string
}

type sameNameHolder struct {
	F *sameNameReusedInPlugins
}

func UnexportedNameReuse() {

			// any data, so we can tell the caller that we
			// couldn't handle the transfer and let them fall
			// back to more generic code.
			return 0, false, nil
		case syscall.EXDEV, syscall.EINVAL, syscall.EIO, syscall.EOPNOTSUPP, syscall.EPERM:
			// Prior to Linux 5.3, it was not possible to
			// copy_file_range across file systems. Similarly to
			// the ENOSYS case above, if we see EXDEV, we have

	EISDIR       = syscall.NewError("file is a directory")
	ENOENT       = syscall.NewError("file does not exist")
	EEXIST       = syscall.NewError("file already exists")
	EMFILE       = syscall.NewError("no free file descriptors")
	EIO          = syscall.NewError("i/o error")
	ENAMETOOLONG = syscall.NewError("file name too long")
	EINTR        = syscall.NewError("interrupted")
	EPERM        = syscall.NewError("permission denied")

	EISDIR       = NewError("file is a directory")
	ENOENT       = NewError("file does not exist")
	EEXIST       = NewError("file already exists")
	EMFILE       = NewError("no free file descriptors")
	EIO          = NewError("i/o error")
	ENAMETOOLONG = NewError("file name too long")
	EINTR        = NewError("interrupted")
	EPERM        = NewError("permission denied")
	EBUSY        = NewError("no free devices")

	EFBIG           Errno = 22
	EHOSTUNREACH    Errno = 23
	EIDRM           Errno = 24
	EILSEQ          Errno = 25
	EINPROGRESS     Errno = 26
	EINTR           Errno = 27
	EINVAL          Errno = 28
	EIO             Errno = 29
	EISCONN         Errno = 30
	EISDIR          Errno = 31
	ELOOP           Errno = 32
	EMFILE          Errno = 33
	EMLINK          Errno = 34
	EMSGSIZE        Errno = 35
	EMULTIHOP       Errno = 36

// In this case, unix.GetRandom will not return an error.
func getRandom(p []byte) error {
	n, err := unix.GetRandom(p, 0)
	if err != nil {
		return err
	}
	if n != len(p) {
		return syscall.EIO
	}
	return nil

		return errENOENT
	}
	return e
}

var errnoByCode = map[string]Errno{
	"EPERM":           EPERM,
	"ENOENT":          ENOENT,
	"ESRCH":           ESRCH,
	"EINTR":           EINTR,
	"EIO":             EIO,
	"ENXIO":           ENXIO,
	"E2BIG":           E2BIG,
	"ENOEXEC":         ENOEXEC,
	"EBADF":           EBADF,
	"ECHILD":          ECHILD,
	"EAGAIN":          EAGAIN,
	"ENOMEM":          ENOMEM,

	ECONNREFUSED
	ECONNRESET
	EDEADLK
	EDEADLOCK
	EDESTADDRREQ
	EDOM
	EDOTDOT
	EDQUOT
	EEXIST
	EFAULT
	EFBIG
	EHOSTDOWN
	EHOSTUNREACH
	EIDRM
	EILSEQ
	EINPROGRESS
	EINTR
	EINVAL
	EIO
	EISCONN
	EISDIR
	EISNAM
	EKEYEXPIRED
	EKEYREJECTED
	EKEYREVOKED
	EL2HLT
	EL2NSYNC
	EL3HLT
	EL3RST
	ELIBACC
	ELIBBAD
	ELIBEXEC
	ELIBMAX
	ELIBSCN
	ELNRNG
	ELOOP
	EMEDIUMTYPE

	if err != nil {
		return 0, err
	}

	n := uintptr(4)
	buf := make([]byte, 4)
	if err := sysctl(mib, &buf[0], &n, nil, 0); err != nil {
		return 0, err
	}
	if n != 4 {
		return 0, EIO
	}
	return *(*uint32)(unsafe.Pointer(&buf[0])), nil
}

func SysctlUint64(name string, args ...int) (uint64, error) {
	mib, err := sysctlmib(name, args...)
	if err != nil {
		return 0, err
	}

	if unsafe.Sizeof(*basep) == 8 {
		return
	}
	if off>>32 != 0 {
		// We can't stuff the offset back into a uintptr, so any
		// future calls would be suspect. Generate an error.
		// EIO was allowed by getdirentries.
		err = EIO
	}
	return
}

//sys	Getcwd(buf []byte) (n int, err error) = SYS___GETCWD

func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
	if raceenabled {