Nswap    int64
	Inblock  int64
	Oublock  int64
	Msgsnd   int64
	Msgrcv   int64
	Nsignals int64
	Nvcsw    int64
	Nivcsw   int64
}

type Rlimit struct {
	Cur uint64
	Max uint64
}

type Pid_t int32

type _Gid_t uint32

type dev_t uint64

type Stat_t struct {
	Dev      uint64
	Ino      uint64
	Mode     uint32
	Nlink    int16
	Flag     uint16
	Uid      uint32
	Gid      uint32

		pgrp := int32(syscall.Getpgrp()) // assume that pid_t is int32
		if err := unix.Tcsetpgrp(ptyFD, pgrp); err != nil {
			return fmt.Errorf("error setting tty process group: %w", err)
		}

		// Give the kernel time to potentially wake readers and have
		// them return EINTR (darwin does this).
		time.Sleep(pause)

		// Give TTY back.
		pid := int32(cmd.Process.Pid) // assume that pid_t is int32

	Nswap    int32
	Inblock  int32
	Oublock  int32
	Msgsnd   int32
	Msgrcv   int32
	Nsignals int32
	Nvcsw    int32
	Nivcsw   int32
}

type Rlimit struct {
	Cur uint64
	Max uint64
}

type Pid_t int32

type _Gid_t uint32

type dev_t uint32

type Stat_t struct {
	Dev      uint32
	Ino      uint32
	Mode     uint32
	Nlink    int16
	Flag     uint16
	Uid      uint32
	Gid      uint32

	childTID   uint64 // Where to store child TID, in child's memory (pid_t *)
	parentTID  uint64 // Where to store child TID, in parent's memory (pid_t *)
	exitSignal uint64 // Signal to deliver to parent on child termination
	stack      uint64 // Pointer to lowest byte of stack
	stackSize  uint64 // Size of stack
	tls        uint64 // Location of new TLS
	setTID     uint64 // Pointer to a pid_t array (since Linux 5.5)

		// Place child in process group.
		_, _, err1 = RawSyscall(SYS_SETPGID, 0, uintptr(sys.Pgid), 0)
		if err1 != 0 {
			goto childerror
		}
	}

	if sys.Foreground {
		// This should really be pid_t, however _C_int (aka int32) is
		// generally equivalent.
		pgrp = _C_int(sys.Pgid)
		if pgrp == 0 {
			r1, _, err1 = RawSyscall(SYS_GETPID, 0, 0, 0)
			if err1 != 0 {
				goto childerror
			}

		// Place child in process group.
		_, _, err1 = RawSyscall(SYS_SETPGID, 0, uintptr(sys.Pgid), 0)
		if err1 != 0 {
			goto childerror
		}
	}

	if sys.Foreground {
		// This should really be pid_t, however _C_int (aka int32) is
		// generally equivalent.
		pgrp = _C_int(sys.Pgid)
		if pgrp == 0 {
			r1, _, err1 = RawSyscall(SYS_GETPID, 0, 0, 0)
			if err1 != 0 {
				goto childerror
			}

		_, _, err1 = rawSyscall(abi.FuncPCABI0(libc_setpgid_trampoline), 0, uintptr(sys.Pgid), 0)
		if err1 != 0 {
			goto childerror
		}
	}

	if sys.Foreground {
		// This should really be pid_t, however _C_int (aka int32) is
		// generally equivalent.
		pgrp = _C_int(sys.Pgid)
		if pgrp == 0 {
			r1, _, err1 = rawSyscall(abi.FuncPCABI0(libc_getpid_trampoline), 0, 0, 0)
			if err1 != 0 {
				goto childerror

		err = errnoErr(e1)
	}
	return
}

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

func wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error) {
	r0, e1 := callwait4(int(pid), uintptr(unsafe.Pointer(status)), options, uintptr(unsafe.Pointer(rusage)))
	wpid = Pid_t(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

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

	}
	return
}

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

func wait4(pid Pid_t, status *_C_int, options int, rusage *Rusage) (wpid Pid_t, err error) {
	r0, er := C.wait4(C.int(pid), C.uintptr_t(uintptr(unsafe.Pointer(status))), C.int(options), C.uintptr_t(uintptr(unsafe.Pointer(rusage))))
	wpid = Pid_t(r0)
	if r0 == -1 && er != nil {
		err = er
	}
	return
}

index aed2750..434a533 100644
--- a/sysdeps/gnu/bits/utmp.h
+++ b/sysdeps/gnu/bits/utmp.h
@@ -59,10 +59,14 @@ struct utmp
 {
   short int ut_type;		/* Type of login.  */
   pid_t ut_pid;			/* Process ID of login process.  */
-  char ut_line[UT_LINESIZE];	/* Devicename.  */
-  char ut_id[4];		/* Inittab ID.  */
-  char ut_user[UT_NAMESIZE];	/* Username.  */