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Source file src/syscall/syscall_freebsd.go

Documentation: syscall

  // 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.
  
  // FreeBSD 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 syscall
  
  import "unsafe"
  
  type SockaddrDatalink struct {
  	Len    uint8
  	Family uint8
  	Index  uint16
  	Type   uint8
  	Nlen   uint8
  	Alen   uint8
  	Slen   uint8
  	Data   [46]int8
  	raw    RawSockaddrDatalink
  }
  
  // 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) {
  	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 Pipe(p []int) 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)
  	p[0] = int(pp[0])
  	p[1] = int(pp[1])
  	return err
  }
  
  func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) {
  	var value IPMreqn
  	vallen := _Socklen(SizeofIPMreqn)
  	errno := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
  	return &value, errno
  }
  
  func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) {
  	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
  }
  
  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(&rsa)
  	if err != nil {
  		Close(nfd)
  		nfd = 0
  	}
  	return
  }
  
  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
  }
  
  func setattrlistTimes(path string, times []Timespec) error {
  	// used on Darwin for UtimesNano
  	return ENOSYS
  }
  
  /*
   * 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	Fchdir(fd int) (err error)
  //sys	Fchflags(fd int, flags int) (err error)
  //sys	Fchmod(fd int, mode uint32) (err error)
  //sys	Fchown(fd int, uid int, gid 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	Fstatfs(fd int, stat *Statfs_t) (err error)
  //sys	Fsync(fd int) (err error)
  //sys	Ftruncate(fd int, length int64) (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 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	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	Mkfifo(path string, mode uint32) (err error)
  //sys	Mknod(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	Pathconf(path string, name int) (val int, err error)
  //sys	Pread(fd int, p []byte, offset int64) (n int, err error)
  //sys	Pwrite(fd int, p []byte, offset int64) (n 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	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(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (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	Setrlimit(which int, lim *Rlimit) (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	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	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	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)
  //sys	utimensat(dirfd int, path string, times *[2]Timespec, flag int) (err error)
  //sys	getcwd(buf []byte) (n int, err error) = SYS___GETCWD
  

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