1 // Copyright 2009,2010 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
5 // Darwin system calls.
6 // This file is compiled as ordinary Go code,
7 // but it is also input to mksyscall,
8 // which parses the //sys lines and generates system call stubs.
9 // Note that sometimes we use a lowercase //sys name and wrap
10 // it in our own nicer implementation, either here or in
11 // syscall_bsd.go or syscall_unix.go.
20 const ImplementsGetwd = true
22 func Getwd() (string, error) {
23 buf := make([]byte, 2048)
24 attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0)
25 if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 {
26 wd := string(attrs[0])
27 // Sanity check that it's an absolute path and ends
28 // in a null byte, which we then strip.
29 if wd[0] == '/' && wd[len(wd)-1] == 0 {
30 return wd[:len(wd)-1], nil
33 // If pkg/os/getwd.go gets ENOTSUP, it will fall back to the
38 type SockaddrDatalink struct {
47 raw RawSockaddrDatalink
50 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
51 func nametomib(name string) (mib []_C_int, err error) {
52 const siz = unsafe.Sizeof(mib[0])
54 // NOTE(rsc): It seems strange to set the buffer to have
55 // size CTL_MAXNAME+2 but use only CTL_MAXNAME
56 // as the size. I don't know why the +2 is here, but the
57 // kernel uses +2 for its own implementation of this function.
58 // I am scared that if we don't include the +2 here, the kernel
59 // will silently write 2 words farther than we specify
60 // and we'll get memory corruption.
61 var buf [CTL_MAXNAME + 2]_C_int
62 n := uintptr(CTL_MAXNAME) * siz
64 p := (*byte)(unsafe.Pointer(&buf[0]))
65 bytes, err := ByteSliceFromString(name)
70 // Magic sysctl: "setting" 0.3 to a string name
71 // lets you read back the array of integers form.
72 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
75 return buf[0 : n/siz], nil
78 func direntIno(buf []byte) (uint64, bool) {
79 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
82 func direntReclen(buf []byte) (uint64, bool) {
83 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
86 func direntNamlen(buf []byte) (uint64, bool) {
87 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
90 //sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
91 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
92 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }
96 attrCmnModtime = 0x00000400
97 attrCmnAcctime = 0x00001000
98 attrCmnFullpath = 0x08000000
101 type attrList struct {
111 func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) {
112 if len(attrBuf) < 4 {
113 return nil, errorspkg.New("attrBuf too small")
115 attrList.bitmapCount = attrBitMapCount
118 _p0, err = BytePtrFromString(path)
123 _, _, e1 := Syscall6(
125 uintptr(unsafe.Pointer(_p0)),
126 uintptr(unsafe.Pointer(&attrList)),
127 uintptr(unsafe.Pointer(&attrBuf[0])),
128 uintptr(len(attrBuf)),
135 size := *(*uint32)(unsafe.Pointer(&attrBuf[0]))
137 // dat is the section of attrBuf that contains valid data,
138 // without the 4 byte length header. All attribute offsets
139 // are relative to dat.
141 if int(size) < len(attrBuf) {
144 dat = dat[4:] // remove length prefix
146 for i := uint32(0); int(i) < len(dat); {
149 return attrs, errorspkg.New("truncated attribute header")
151 datOff := *(*int32)(unsafe.Pointer(&header[0]))
152 attrLen := *(*uint32)(unsafe.Pointer(&header[4]))
153 if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) {
154 return attrs, errorspkg.New("truncated results; attrBuf too small")
156 end := uint32(datOff) + attrLen
157 attrs = append(attrs, dat[datOff:end])
159 if r := i % 4; r != 0 {
166 //sysnb pipe() (r int, w int, err error)
168 func Pipe(p []int) (err error) {
172 p[0], p[1], err = pipe()
176 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
177 var _p0 unsafe.Pointer
180 _p0 = unsafe.Pointer(&buf[0])
181 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
183 r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags))
191 func setattrlistTimes(path string, times []Timespec) error {
192 _p0, err := BytePtrFromString(path)
197 var attrList attrList
198 attrList.bitmapCount = attrBitMapCount
199 attrList.CommonAttr = attrCmnModtime | attrCmnAcctime
201 // order is mtime, atime: the opposite of Chtimes
202 attributes := [2]Timespec{times[1], times[0]}
204 _, _, e1 := Syscall6(
206 uintptr(unsafe.Pointer(_p0)),
207 uintptr(unsafe.Pointer(&attrList)),
208 uintptr(unsafe.Pointer(&attributes)),
209 uintptr(unsafe.Sizeof(attributes)),
219 func utimensat(dirfd int, path string, times *[2]Timespec, flag int) error {
220 // Darwin doesn't support SYS_UTIMENSAT
228 //sys kill(pid int, signum int, posix int) (err error)
230 func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1) }
235 //sys Access(path string, mode uint32) (err error)
236 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
237 //sys Chdir(path string) (err error)
238 //sys Chflags(path string, flags int) (err error)
239 //sys Chmod(path string, mode uint32) (err error)
240 //sys Chown(path string, uid int, gid int) (err error)
241 //sys Chroot(path string) (err error)
242 //sys Close(fd int) (err error)
243 //sys Dup(fd int) (nfd int, err error)
244 //sys Dup2(from int, to int) (err error)
245 //sys Exchangedata(path1 string, path2 string, options int) (err error)
246 //sys Fchdir(fd int) (err error)
247 //sys Fchflags(fd int, flags int) (err error)
248 //sys Fchmod(fd int, mode uint32) (err error)
249 //sys Fchown(fd int, uid int, gid int) (err error)
250 //sys Flock(fd int, how int) (err error)
251 //sys Fpathconf(fd int, name int) (val int, err error)
252 //sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
253 //sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64
254 //sys Fsync(fd int) (err error)
255 // Fsync is not called for os.File.Sync(). Please see internal/poll/fd_fsync_darwin.go
256 //sys Ftruncate(fd int, length int64) (err error)
257 //sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64
258 //sys Getdtablesize() (size int)
259 //sysnb Getegid() (egid int)
260 //sysnb Geteuid() (uid int)
261 //sysnb Getgid() (gid int)
262 //sysnb Getpgid(pid int) (pgid int, err error)
263 //sysnb Getpgrp() (pgrp int)
264 //sysnb Getpid() (pid int)
265 //sysnb Getppid() (ppid int)
266 //sys Getpriority(which int, who int) (prio int, err error)
267 //sysnb Getrlimit(which int, lim *Rlimit) (err error)
268 //sysnb Getrusage(who int, rusage *Rusage) (err error)
269 //sysnb Getsid(pid int) (sid int, err error)
270 //sysnb Getuid() (uid int)
271 //sysnb Issetugid() (tainted bool)
272 //sys Kqueue() (fd int, err error)
273 //sys Lchown(path string, uid int, gid int) (err error)
274 //sys Link(path string, link string) (err error)
275 //sys Listen(s int, backlog int) (err error)
276 //sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
277 //sys Mkdir(path string, mode uint32) (err error)
278 //sys Mkfifo(path string, mode uint32) (err error)
279 //sys Mknod(path string, mode uint32, dev int) (err error)
280 //sys Mlock(b []byte) (err error)
281 //sys Mlockall(flags int) (err error)
282 //sys Mprotect(b []byte, prot int) (err error)
283 //sys Munlock(b []byte) (err error)
284 //sys Munlockall() (err error)
285 //sys Open(path string, mode int, perm uint32) (fd int, err error)
286 //sys Pathconf(path string, name int) (val int, err error)
287 //sys Pread(fd int, p []byte, offset int64) (n int, err error)
288 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error)
289 //sys read(fd int, p []byte) (n int, err error)
290 //sys Readlink(path string, buf []byte) (n int, err error)
291 //sys Rename(from string, to string) (err error)
292 //sys Revoke(path string) (err error)
293 //sys Rmdir(path string) (err error)
294 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
295 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
296 //sys Setegid(egid int) (err error)
297 //sysnb Seteuid(euid int) (err error)
298 //sysnb Setgid(gid int) (err error)
299 //sys Setlogin(name string) (err error)
300 //sysnb Setpgid(pid int, pgid int) (err error)
301 //sys Setpriority(which int, who int, prio int) (err error)
302 //sys Setprivexec(flag int) (err error)
303 //sysnb Setregid(rgid int, egid int) (err error)
304 //sysnb Setreuid(ruid int, euid int) (err error)
305 //sysnb Setrlimit(which int, lim *Rlimit) (err error)
306 //sysnb Setsid() (pid int, err error)
307 //sysnb Settimeofday(tp *Timeval) (err error)
308 //sysnb Setuid(uid int) (err error)
309 //sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
310 //sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64
311 //sys Symlink(path string, link string) (err error)
312 //sys Sync() (err error)
313 //sys Truncate(path string, length int64) (err error)
314 //sys Umask(newmask int) (oldmask int)
315 //sys Undelete(path string) (err error)
316 //sys Unlink(path string) (err error)
317 //sys Unmount(path string, flags int) (err error)
318 //sys write(fd int, p []byte) (n int, err error)
319 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
320 //sys munmap(addr uintptr, length uintptr) (err error)
321 //sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
322 //sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE