code review 12349044: os, syscall: implement Getwd on darwin using getattrlist

src/pkg/syscall/syscall_bsd.go

 // 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.
 
 // +build darwin freebsd netbsd openbsd
 
 // BSD system call wrappers shared by *BSD based systems
 // including OS X (Darwin) and FreeBSD.  Like the other
 // syscall_*.go files it is compiled as Go code but also
 // used as input to mksyscall which parses the //sys
 // lines and generates system call stubs.
 
 package syscall
 
 import (
         "runtime"
         "unsafe"
 )
 
 /*
- * Pseudo-system calls
- */
-
-// The const provides a compile-time constant so clients
-// can adjust to whether there is a working Getwd and avoid
-// even linking this function into the binary.  See ../os/getwd.go.
-const ImplementsGetwd = false
-
-func Getwd() (string, error) { return "", ENOTSUP }
-
-/*
  * Wrapped
  */
 
 //sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error)
 //sysnb setgroups(ngid int, gid *_Gid_t) (err error)
 
 func Getgroups() (gids []int, err error) {
         n, err := getgroups(0, nil)
         if err != nil {
                 return nil, err
@@ skipping 495 matching lines @@
         munmap: munmap,
 }
 
 func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) {
         return mapper.Mmap(fd, offset, length, prot, flags)
 }
 
 func Munmap(b []byte) (err error) {
         return mapper.Munmap(b)
 }