src

syscall_dragonfly.go (11684B)

---

 // Copyright 2009 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.
 
 // DragonFly BSD 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 (
 	"sync"
 	"unsafe"
 )
 
 // See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
 var (
 	osreldateOnce sync.Once
 	osreldate     uint32
 )
 
 // First __DragonFly_version after September 2019 ABI changes
 // http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
 const _dragonflyABIChangeVersion = 500705
 
 func supportsABI(ver uint32) bool {
 	osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
 	return osreldate >= ver
 }
 
 // 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   [12]int8
 	Rcf    uint16
 	Route  [16]uint16
 	raw    RawSockaddrDatalink
 }
 
 func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 	return nil, EAFNOSUPPORT
 }
 
 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
 func nametomib(name string) (mib []_C_int, err error) {
 	const siz = unsafe.Sizeof(mib[0])
 
 	// NOTE(rsc): It seems strange to set the buffer to have
 	// size CTL_MAXNAME+2 but use only CTL_MAXNAME
 	// as the size. I don't know why the +2 is here, but the
 	// kernel uses +2 for its own implementation of this function.
 	// I am scared that if we don't include the +2 here, the kernel
 	// will silently write 2 words farther than we specify
 	// and we'll get memory corruption.
 	var buf [CTL_MAXNAME + 2]_C_int
 	n := uintptr(CTL_MAXNAME) * siz
 
 	p := (*byte)(unsafe.Pointer(&buf[0]))
 	bytes, err := ByteSliceFromString(name)
 	if err != nil {
 		return nil, err
 	}
 
 	// Magic sysctl: "setting" 0.3 to a string name
 	// lets you read back the array of integers form.
 	if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
 		return nil, err
 	}
 	return buf[0 : n/siz], nil
 }
 
 func direntIno(buf []byte) (uint64, bool) {
 	return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno))
 }
 
 func direntReclen(buf []byte) (uint64, bool) {
 	namlen, ok := direntNamlen(buf)
 	if !ok {
 		return 0, false
 	}
 	return (16 + namlen + 1 + 7) &^ 7, true
 }
 
 func direntNamlen(buf []byte) (uint64, bool) {
 	return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
 }
 
 //sysnb	pipe() (r int, w int, err error)
 
 func Pipe(p []int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
 	}
 	r, w, err := pipe()
 	if err == nil {
 		p[0], p[1] = r, w
 	}
 	return
 }
 
 //sysnb	pipe2(p *[2]_C_int, flags int) (r int, w int, err error)
 
 func Pipe2(p []int, flags int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
 	}
 	var pp [2]_C_int
 	// pipe2 on dragonfly takes an fds array as an argument, but still
 	// returns the file descriptors.
 	r, w, err := pipe2(&pp, flags)
 	if err == nil {
 		p[0], p[1] = r, w
 	}
 	return err
 }
 
 //sys	extpread(fd int, p []byte, flags int, offset int64) (n int, err error)
 
 func pread(fd int, p []byte, offset int64) (n int, err error) {
 	return extpread(fd, p, 0, offset)
 }
 
 //sys	extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error)
 
 func pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	return extpwrite(fd, p, 0, offset)
 }
 
 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
 	var rsa RawSockaddrAny
 	var len _Socklen = SizeofSockaddrAny
 	nfd, err = accept4(fd, &rsa, &len, flags)
 	if err != nil {
 		return
 	}
 	if len > SizeofSockaddrAny {
 		panic("RawSockaddrAny too small")
 	}
 	sa, err = anyToSockaddr(fd, &rsa)
 	if err != nil {
 		Close(nfd)
 		nfd = 0
 	}
 	return
 }
 
 //sys	Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
 
 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	ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL
 
 //sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
 
 func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error {
 	err := sysctl(mib, old, oldlen, nil, 0)
 	if err != nil {
 		// Utsname members on Dragonfly are only 32 bytes and
 		// the syscall returns ENOMEM in case the actual value
 		// is longer.
 		if err == ENOMEM {
 			err = nil
 		}
 	}
 	return err
 }
 
 func Uname(uname *Utsname) error {
 	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
 	n := unsafe.Sizeof(uname.Sysname)
 	if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil {
 		return err
 	}
 	uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0
 
 	mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
 	n = unsafe.Sizeof(uname.Nodename)
 	if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil {
 		return err
 	}
 	uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0
 
 	mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
 	n = unsafe.Sizeof(uname.Release)
 	if err := sysctlUname(mib, &uname.Release[0], &n); err != nil {
 		return err
 	}
 	uname.Release[unsafe.Sizeof(uname.Release)-1] = 0
 
 	mib = []_C_int{CTL_KERN, KERN_VERSION}
 	n = unsafe.Sizeof(uname.Version)
 	if err := sysctlUname(mib, &uname.Version[0], &n); 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 := sysctlUname(mib, &uname.Machine[0], &n); err != nil {
 		return err
 	}
 	uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0
 
 	return nil
 }
 
 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)
 }
 
 func Dup3(oldfd, newfd, flags int) error {
 	if oldfd == newfd || flags&^O_CLOEXEC != 0 {
 		return EINVAL
 	}
 	how := F_DUP2FD
 	if flags&O_CLOEXEC != 0 {
 		how = F_DUP2FD_CLOEXEC
 	}
 	_, err := fcntl(oldfd, how, newfd)
 	return err
 }
 
 /*
  * 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	ClockGettime(clockid int32, time *Timespec) (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	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)
 //sys	Getdents(fd int, buf []byte) (n int, err error)
 //sys	Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error)
 //sys	Getdtablesize() (size int)
 //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	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	Mknod(path string, mode uint32, dev int) (err error)
 //sys	Mknodat(fd 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	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	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	Undelete(path string) (err error)
 //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	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
 //sys	utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)