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347 lines
11 KiB
347 lines
11 KiB
// Copyright 2009 The Go Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file. |
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// DragonFly BSD system calls. |
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// This file is compiled as ordinary Go code, |
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// but it is also input to mksyscall, |
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// which parses the //sys lines and generates system call stubs. |
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// Note that sometimes we use a lowercase //sys name and wrap |
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// it in our own nicer implementation, either here or in |
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// syscall_bsd.go or syscall_unix.go. |
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package unix |
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import ( |
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"sync" |
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"unsafe" |
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) |
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// See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h |
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var ( |
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osreldateOnce sync.Once |
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osreldate uint32 |
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) |
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// First __DragonFly_version after September 2019 ABI changes |
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// http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html |
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const _dragonflyABIChangeVersion = 500705 |
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func supportsABI(ver uint32) bool { |
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osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") }) |
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return osreldate >= ver |
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} |
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// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets. |
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type SockaddrDatalink struct { |
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Len uint8 |
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Family uint8 |
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Index uint16 |
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Type uint8 |
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Nlen uint8 |
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Alen uint8 |
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Slen uint8 |
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Data [12]int8 |
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Rcf uint16 |
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Route [16]uint16 |
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raw RawSockaddrDatalink |
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} |
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func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) { |
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return nil, EAFNOSUPPORT |
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} |
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// Translate "kern.hostname" to []_C_int{0,1,2,3}. |
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func nametomib(name string) (mib []_C_int, err error) { |
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const siz = unsafe.Sizeof(mib[0]) |
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// NOTE(rsc): It seems strange to set the buffer to have |
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// size CTL_MAXNAME+2 but use only CTL_MAXNAME |
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// as the size. I don't know why the +2 is here, but the |
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// kernel uses +2 for its own implementation of this function. |
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// I am scared that if we don't include the +2 here, the kernel |
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// will silently write 2 words farther than we specify |
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// and we'll get memory corruption. |
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var buf [CTL_MAXNAME + 2]_C_int |
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n := uintptr(CTL_MAXNAME) * siz |
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p := (*byte)(unsafe.Pointer(&buf[0])) |
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bytes, err := ByteSliceFromString(name) |
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if err != nil { |
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return nil, err |
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} |
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// Magic sysctl: "setting" 0.3 to a string name |
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// lets you read back the array of integers form. |
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if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil { |
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return nil, err |
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} |
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return buf[0 : n/siz], nil |
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} |
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func direntIno(buf []byte) (uint64, bool) { |
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return readInt(buf, unsafe.Offsetof(Dirent{}.Fileno), unsafe.Sizeof(Dirent{}.Fileno)) |
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} |
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func direntReclen(buf []byte) (uint64, bool) { |
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namlen, ok := direntNamlen(buf) |
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if !ok { |
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return 0, false |
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} |
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return (16 + namlen + 1 + 7) &^ 7, true |
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} |
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func direntNamlen(buf []byte) (uint64, bool) { |
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return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen)) |
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} |
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//sysnb pipe() (r int, w int, err error) |
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func Pipe(p []int) (err error) { |
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if len(p) != 2 { |
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return EINVAL |
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} |
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r, w, err := pipe() |
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if err == nil { |
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p[0], p[1] = r, w |
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} |
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return |
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} |
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//sysnb pipe2(p *[2]_C_int, flags int) (r int, w int, err error) |
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func Pipe2(p []int, flags int) (err error) { |
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if len(p) != 2 { |
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return EINVAL |
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} |
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var pp [2]_C_int |
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// pipe2 on dragonfly takes an fds array as an argument, but still |
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// returns the file descriptors. |
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r, w, err := pipe2(&pp, flags) |
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if err == nil { |
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p[0], p[1] = r, w |
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} |
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return err |
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} |
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//sys extpread(fd int, p []byte, flags int, offset int64) (n int, err error) |
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func pread(fd int, p []byte, offset int64) (n int, err error) { |
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return extpread(fd, p, 0, offset) |
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} |
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//sys extpwrite(fd int, p []byte, flags int, offset int64) (n int, err error) |
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func pwrite(fd int, p []byte, offset int64) (n int, err error) { |
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return extpwrite(fd, p, 0, offset) |
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} |
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func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) { |
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var rsa RawSockaddrAny |
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var len _Socklen = SizeofSockaddrAny |
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nfd, err = accept4(fd, &rsa, &len, flags) |
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if err != nil { |
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return |
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} |
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if len > SizeofSockaddrAny { |
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panic("RawSockaddrAny too small") |
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} |
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sa, err = anyToSockaddr(fd, &rsa) |
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if err != nil { |
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Close(nfd) |
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nfd = 0 |
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} |
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return |
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} |
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//sys Getcwd(buf []byte) (n int, err error) = SYS___GETCWD |
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func Getfsstat(buf []Statfs_t, flags int) (n int, err error) { |
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var _p0 unsafe.Pointer |
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var bufsize uintptr |
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if len(buf) > 0 { |
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_p0 = unsafe.Pointer(&buf[0]) |
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bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf)) |
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} |
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r0, _, e1 := Syscall(SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags)) |
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n = int(r0) |
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if e1 != 0 { |
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err = e1 |
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} |
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return |
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} |
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//sys ioctl(fd int, req uint, arg uintptr) (err error) |
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//sys ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_IOCTL |
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//sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL |
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func sysctlUname(mib []_C_int, old *byte, oldlen *uintptr) error { |
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err := sysctl(mib, old, oldlen, nil, 0) |
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if err != nil { |
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// Utsname members on Dragonfly are only 32 bytes and |
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// the syscall returns ENOMEM in case the actual value |
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// is longer. |
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if err == ENOMEM { |
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err = nil |
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} |
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} |
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return err |
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} |
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func Uname(uname *Utsname) error { |
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mib := []_C_int{CTL_KERN, KERN_OSTYPE} |
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n := unsafe.Sizeof(uname.Sysname) |
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if err := sysctlUname(mib, &uname.Sysname[0], &n); err != nil { |
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return err |
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} |
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uname.Sysname[unsafe.Sizeof(uname.Sysname)-1] = 0 |
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mib = []_C_int{CTL_KERN, KERN_HOSTNAME} |
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n = unsafe.Sizeof(uname.Nodename) |
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if err := sysctlUname(mib, &uname.Nodename[0], &n); err != nil { |
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return err |
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} |
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uname.Nodename[unsafe.Sizeof(uname.Nodename)-1] = 0 |
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mib = []_C_int{CTL_KERN, KERN_OSRELEASE} |
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n = unsafe.Sizeof(uname.Release) |
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if err := sysctlUname(mib, &uname.Release[0], &n); err != nil { |
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return err |
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} |
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uname.Release[unsafe.Sizeof(uname.Release)-1] = 0 |
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mib = []_C_int{CTL_KERN, KERN_VERSION} |
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n = unsafe.Sizeof(uname.Version) |
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if err := sysctlUname(mib, &uname.Version[0], &n); err != nil { |
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return err |
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} |
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// The version might have newlines or tabs in it, convert them to |
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// spaces. |
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for i, b := range uname.Version { |
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if b == '\n' || b == '\t' { |
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if i == len(uname.Version)-1 { |
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uname.Version[i] = 0 |
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} else { |
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uname.Version[i] = ' ' |
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} |
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} |
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} |
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mib = []_C_int{CTL_HW, HW_MACHINE} |
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n = unsafe.Sizeof(uname.Machine) |
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if err := sysctlUname(mib, &uname.Machine[0], &n); err != nil { |
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return err |
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} |
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uname.Machine[unsafe.Sizeof(uname.Machine)-1] = 0 |
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return nil |
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} |
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func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) { |
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if raceenabled { |
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raceReleaseMerge(unsafe.Pointer(&ioSync)) |
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} |
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return sendfile(outfd, infd, offset, count) |
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} |
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/* |
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* Exposed directly |
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*/ |
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//sys Access(path string, mode uint32) (err error) |
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//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) |
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//sys Chdir(path string) (err error) |
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//sys Chflags(path string, flags int) (err error) |
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//sys Chmod(path string, mode uint32) (err error) |
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//sys Chown(path string, uid int, gid int) (err error) |
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//sys Chroot(path string) (err error) |
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//sys ClockGettime(clockid int32, time *Timespec) (err error) |
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//sys Close(fd int) (err error) |
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//sys Dup(fd int) (nfd int, err error) |
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//sys Dup2(from int, to int) (err error) |
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//sys Exit(code int) |
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//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) |
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//sys Fchdir(fd int) (err error) |
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//sys Fchflags(fd int, flags int) (err error) |
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//sys Fchmod(fd int, mode uint32) (err error) |
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//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) |
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//sys Fchown(fd int, uid int, gid int) (err error) |
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//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) |
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//sys Flock(fd int, how int) (err error) |
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//sys Fpathconf(fd int, name int) (val int, err error) |
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//sys Fstat(fd int, stat *Stat_t) (err error) |
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//sys Fstatat(fd int, path string, stat *Stat_t, flags int) (err error) |
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//sys Fstatfs(fd int, stat *Statfs_t) (err error) |
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//sys Fsync(fd int) (err error) |
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//sys Ftruncate(fd int, length int64) (err error) |
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//sys Getdents(fd int, buf []byte) (n int, err error) |
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//sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) |
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//sys Getdtablesize() (size int) |
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//sysnb Getegid() (egid int) |
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//sysnb Geteuid() (uid int) |
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//sysnb Getgid() (gid int) |
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//sysnb Getpgid(pid int) (pgid int, err error) |
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//sysnb Getpgrp() (pgrp int) |
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//sysnb Getpid() (pid int) |
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//sysnb Getppid() (ppid int) |
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//sys Getpriority(which int, who int) (prio int, err error) |
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//sysnb Getrlimit(which int, lim *Rlimit) (err error) |
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//sysnb Getrusage(who int, rusage *Rusage) (err error) |
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//sysnb Getsid(pid int) (sid int, err error) |
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//sysnb Gettimeofday(tv *Timeval) (err error) |
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//sysnb Getuid() (uid int) |
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//sys Issetugid() (tainted bool) |
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//sys Kill(pid int, signum syscall.Signal) (err error) |
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//sys Kqueue() (fd int, err error) |
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//sys Lchown(path string, uid int, gid int) (err error) |
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//sys Link(path string, link string) (err error) |
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//sys Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error) |
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//sys Listen(s int, backlog int) (err error) |
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//sys Lstat(path string, stat *Stat_t) (err error) |
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//sys Mkdir(path string, mode uint32) (err error) |
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//sys Mkdirat(dirfd int, path string, mode uint32) (err error) |
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//sys Mkfifo(path string, mode uint32) (err error) |
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//sys Mknod(path string, mode uint32, dev int) (err error) |
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//sys Mknodat(fd int, path string, mode uint32, dev int) (err error) |
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//sys Nanosleep(time *Timespec, leftover *Timespec) (err error) |
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//sys Open(path string, mode int, perm uint32) (fd int, err error) |
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//sys Openat(dirfd int, path string, mode int, perm uint32) (fd int, err error) |
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//sys Pathconf(path string, name int) (val int, err error) |
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//sys read(fd int, p []byte) (n int, err error) |
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//sys Readlink(path string, buf []byte) (n int, err error) |
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//sys Rename(from string, to string) (err error) |
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//sys Renameat(fromfd int, from string, tofd int, to string) (err error) |
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//sys Revoke(path string) (err error) |
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//sys Rmdir(path string) (err error) |
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//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK |
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//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) |
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//sysnb Setegid(egid int) (err error) |
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//sysnb Seteuid(euid int) (err error) |
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//sysnb Setgid(gid int) (err error) |
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//sys Setlogin(name string) (err error) |
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//sysnb Setpgid(pid int, pgid int) (err error) |
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//sys Setpriority(which int, who int, prio int) (err error) |
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//sysnb Setregid(rgid int, egid int) (err error) |
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//sysnb Setreuid(ruid int, euid int) (err error) |
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//sysnb Setresgid(rgid int, egid int, sgid int) (err error) |
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//sysnb Setresuid(ruid int, euid int, suid int) (err error) |
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//sysnb Setsid() (pid int, err error) |
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//sysnb Settimeofday(tp *Timeval) (err error) |
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//sysnb Setuid(uid int) (err error) |
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//sys Stat(path string, stat *Stat_t) (err error) |
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//sys Statfs(path string, stat *Statfs_t) (err error) |
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//sys Symlink(path string, link string) (err error) |
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//sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) |
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//sys Sync() (err error) |
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//sys Truncate(path string, length int64) (err error) |
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//sys Umask(newmask int) (oldmask int) |
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//sys Undelete(path string) (err error) |
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//sys Unlink(path string) (err error) |
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//sys Unlinkat(dirfd int, path string, flags int) (err error) |
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//sys Unmount(path string, flags int) (err error) |
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//sys write(fd int, p []byte) (n int, err error) |
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//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) |
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//sys munmap(addr uintptr, length uintptr) (err error) |
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//sys accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error) |
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//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error)
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