// Copyright 2009,2010 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.

// OpenBSD system calls.

// This file is compiled as ordinary Go code,

// but it is also input to mksyscall,

// which parses the //sys lines and generates system call stubs.

// Note that sometimes we use a lowercase //sys name and wrap

// it in our own nicer implementation, either here or in

// syscall_bsd.go or syscall_unix.go.

package unix

import (

	"sort"

	"syscall"

	"unsafe"

)

// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.

type SockaddrDatalink struct {

	Len    uint8

	Family uint8

	Index  uint16

	Type   uint8

	Nlen   uint8

	Alen   uint8

	Slen   uint8

	Data   [24]int8

	raw    RawSockaddrDatalink

}

func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {

	return nil, EAFNOSUPPORT

}

func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno)

func nametomib(name string) (mib []_C_int, err error) {

	i := sort.Search(len(sysctlMib), func(i int) bool {

		return sysctlMib[i].ctlname >= name

	})

	if i < len(sysctlMib) && sysctlMib[i].ctlname == name {

		return sysctlMib[i].ctloid, nil

	}

	return nil, EINVAL

}

func direntIno(buf []byte) (uint64, bool) {

	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))

}

func direntReclen(buf []byte) (uint64, bool) {

	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))

}

func direntNamlen(buf []byte) (uint64, bool) {

	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))

}

func SysctlUvmexp(name string) (*Uvmexp, error) {

	mib, err := sysctlmib(name)

	if err != nil {

		return nil, err

	}

	n := uintptr(SizeofUvmexp)

	var u Uvmexp

	if err := sysctl(mib, (*byte)(unsafe.Pointer(&u)), &n, nil, 0); err != nil {

		return nil, err

	}

	if n != SizeofUvmexp {

		return nil, EIO

	}

	return &u, nil

}

func Pipe(p []int) (err error) {

	return Pipe2(p, 0)

}

//sysnb	pipe2(p *[2]_C_int, flags int) (err error)

func Pipe2(p []int, flags int) error {

	if len(p) != 2 {

		return EINVAL

	}

	var pp [2]_C_int

	err := pipe2(&pp, flags)

	return err

}

//sys	Getdents(fd int, buf []byte) (n int, err error)

func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {

	n, err = Getdents(fd, buf)

	if err != nil || basep == nil {

		return

	}

	var off int64

	off, err = Seek(fd, 0, 1 /* SEEK_CUR */)

	if err != nil {

		*basep = ^uintptr(0)

		return

	}

	*basep = uintptr(off)

	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 {

		raceReleaseMerge(unsafe.Pointer(&ioSync))

	}

	return sendfile(outfd, infd, offset, count)

}

// TODO

func sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {

	return -1, ENOSYS

}

func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {

	var _p0 unsafe.Pointer

	var bufsize uintptr

	if len(buf) > 0 {

		_p0 = unsafe.Pointer(&buf[0])

		bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))

	}

	r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))

	n = int(r0)

	if e1 != 0 {

		err = e1

	}

	return

}

//sys	ioctl(fd int, req uint, arg uintptr) (err error)

//sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL

//sys	ppoll(fds *PollFd, nfds int, timeout *Timespec, sigmask *Sigset_t) (n int, err error)

func Ppoll(fds []PollFd, timeout *Timespec, sigmask *Sigset_t) (n int, err error) {

	if len(fds) == 0 {

		return ppoll(nil, 0, timeout, sigmask)

	}

	return ppoll(&fds[0], len(fds), timeout, sigmask)

}

func Uname(uname *Utsname) error {

	mib := []_C_int{CTL_KERN, KERN_OSTYPE}

	n := unsafe.Sizeof(uname.Sysname)

	if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {

		return err

	}

	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}

	n = unsafe.Sizeof(uname.Nodename)

	if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {

		return err

	}

	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}

	n = unsafe.Sizeof(uname.Release)

	if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {

		return err

	}

	mib = []_C_int{CTL_KERN, KERN_VERSION}

	n = unsafe.Sizeof(uname.Version)

	if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {

		return err

	}

	// The version might have newlines or tabs in it, convert them to

	// spaces.

	for i, b := range uname.Version {

		if b == '\n' || b == '\t' {

			if i == len(uname.Version)-1 {

				uname.Version[i] = 0

			} else {

				uname.Version[i] = ' '

			}

		}

	}

	mib = []_C_int{CTL_HW, HW_MACHINE}

	n = unsafe.Sizeof(uname.Machine)

	if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {

		return err

	}

	return nil

}

/*

 * Exposed directly

 */

//sys	Access(path string, mode uint32) (err error)

//sys	Adjtime(delta *Timeval, olddelta *Timeval) (err error)

//sys	Chdir(path string) (err error)

//sys	Chflags(path string, flags int) (err error)

//sys	Chmod(path string, mode uint32) (err error)

//sys	Chown(path string, uid int, gid int) (err error)

//sys	Chroot(path string) (err error)

//sys	Close(fd int) (err error)

//sys	Dup(fd int) (nfd int, err error)

//sys	Dup2(from int, to int) (err error)

//sys	Dup3(from int, to int, flags int) (err error)

//sys	Exit(code int)

//sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)

//sys	Fchdir(fd int) (err error)

//sys	Fchflags(fd int, flags int) (err error)

//sys	Fchmod(fd int, mode uint32) (err error)

//sys	Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)

//sys	Fchown(fd int, uid int, gid int) (err error)

//sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)

//sys	Flock(fd int, how int) (err error)

//sys	Fpathconf(fd int, name int) (val int, err error)

//sys	Fstat(fd int, stat *Stat_t) (err error)

//sys	Fstatat(fd int, path string, stat *Stat_t, flags int) (err error)

//sys	Fstatfs(fd int, stat *Statfs_t) (err error)

//sys	Fsync(fd int) (err error)

//sys	Ftruncate(fd int, length int64) (err error)

//sysnb	Getegid() (egid int)

//sysnb	Geteuid() (uid int)

//sysnb	Getgid() (gid int)

//sysnb	Getpgid(pid int) (pgid int, err error)

//sysnb	Getpgrp() (pgrp int)

//sysnb	Getpid() (pid int)

//sysnb	Getppid() (ppid int)

//sys	Getpriority(which int, who int) (prio int, err error)

//sysnb	Getrlimit(which int, lim *Rlimit) (err error)

//sysnb	Getrtable() (rtable int, err error)

//sysnb	Getrusage(who int, rusage *Rusage) (err error)

//sysnb	Getsid(pid int) (sid int, err error)

//sysnb	Gettimeofday(tv *Timeval) (err error)

//sysnb	Getuid() (uid int)

//sys	Issetugid() (tainted bool)

//sys	Kill(pid int, signum syscall.Signal) (err error)

//sys	Kqueue() (fd int, err error)

//sys	Lchown(path string, uid int, gid int) (err error)

//sys	Link(path string, link string) (err error)

//sys	Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)

//sys	Listen(s int, backlog int) (err error)

//sys	Lstat(path string, stat *Stat_t) (err error)

//sys	Mkdir(path string, mode uint32) (err error)

//sys	Mkdirat(dirfd int, path string, mode uint32) (err error)

//sys	Mkfifo(path string, mode uint32) (err error)

//sys	Mkfifoat(dirfd int, path string, mode uint32) (err error)

//sys	Mknod(path string, mode uint32, dev int) (err error)

//sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)

//sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)

//sys	Open(path string, mode int, perm uint32) (fd int, err error)

//sys	Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error)

//sys	Pathconf(path string, name int) (val int, err error)

//sys	read(fd int, p []byte) (n int, err error)

//sys	Readlink(path string, buf []byte) (n int, err error)

//sys	Readlinkat(dirfd int, path string, buf []byte) (n int, err error)

//sys	Rename(from string, to string) (err error)

//sys	Renameat(fromfd int, from string, tofd int, to string) (err error)

//sys	Revoke(path string) (err error)

//sys	Rmdir(path string) (err error)

//sys	Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK

//sys	Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)

//sysnb	Setegid(egid int) (err error)

//sysnb	Seteuid(euid int) (err error)

//sysnb	Setgid(gid int) (err error)

//sys	Setlogin(name string) (err error)

//sysnb	Setpgid(pid int, pgid int) (err error)

//sys	Setpriority(which int, who int, prio int) (err error)

//sysnb	Setregid(rgid int, egid int) (err error)

//sysnb	Setreuid(ruid int, euid int) (err error)

//sysnb	Setresgid(rgid int, egid int, sgid int) (err error)

//sysnb	Setresuid(ruid int, euid int, suid int) (err error)

//sysnb	Setrlimit(which int, lim *Rlimit) (err error)

//sysnb	Setrtable(rtable int) (err error)

//sysnb	Setsid() (pid int, err error)

//sysnb	Settimeofday(tp *Timeval) (err error)

//sysnb	Setuid(uid int) (err error)

//sys	Stat(path string, stat *Stat_t) (err error)

//sys	Statfs(path string, stat *Statfs_t) (err error)

//sys	Symlink(path string, link string) (err error)

//sys	Symlinkat(oldpath string, newdirfd int, newpath string) (err error)

//sys	Sync() (err error)

//sys	Truncate(path string, length int64) (err error)

//sys	Umask(newmask int) (oldmask int)

//sys	Unlink(path string) (err error)

//sys	Unlinkat(dirfd int, path string, flags int) (err error)

//sys	Unmount(path string, flags int) (err error)

//sys	write(fd int, p []byte) (n int, err error)

//sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)

//sys	munmap(addr uintptr, length uintptr) (err error)

//sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ

//sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE

//sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)

/*

 * Unimplemented

 */

// __getcwd

// __semctl

// __syscall

// __sysctl

// adjfreq

// break

// clock_getres

// clock_gettime

// clock_settime

// closefrom

// execve

// fhopen

// fhstat

// fhstatfs

// fork

// futimens

// getfh

// getgid

// getitimer

// getlogin

// getresgid

// getresuid

// getthrid

// ktrace

// lfs_bmapv

// lfs_markv

// lfs_segclean

// lfs_segwait

// mincore

// minherit

// mount

// mquery

// msgctl

// msgget

// msgrcv

// msgsnd

// nfssvc

// nnpfspioctl

// preadv

// profil

// pwritev

// quotactl

// readv

// reboot

// renameat

// rfork

// sched_yield

// semget

// semop

// setgroups

// setitimer

// setsockopt

// shmat

// shmctl

// shmdt

// shmget

// sigaction

// sigaltstack

// sigpending

// sigprocmask

// sigreturn

// sigsuspend

// sysarch

// syscall

// threxit

// thrsigdivert

// thrsleep

// thrwakeup

// vfork

// writev