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.
17 type SockaddrDatalink struct {
26 raw RawSockaddrDatalink
29 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
30 func nametomib(name string) (mib []_C_int, err error) {
31 const siz = unsafe.Sizeof(mib[0])
33 // NOTE(rsc): It seems strange to set the buffer to have
34 // size CTL_MAXNAME+2 but use only CTL_MAXNAME
35 // as the size. I don't know why the +2 is here, but the
36 // kernel uses +2 for its own implementation of this function.
37 // I am scared that if we don't include the +2 here, the kernel
38 // will silently write 2 words farther than we specify
39 // and we'll get memory corruption.
40 var buf [CTL_MAXNAME + 2]_C_int
41 n := uintptr(CTL_MAXNAME) * siz
43 p := (*byte)(unsafe.Pointer(&buf[0]))
44 bytes, err := ByteSliceFromString(name)
49 // Magic sysctl: "setting" 0.3 to a string name
50 // lets you read back the array of integers form.
51 if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
54 return buf[0 : n/siz], nil
57 func direntIno(buf []byte) (uint64, bool) {
58 return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
61 func direntReclen(buf []byte) (uint64, bool) {
62 return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
65 func direntNamlen(buf []byte) (uint64, bool) {
66 return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
69 func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
70 func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }
74 attrCmnModtime = 0x00000400
75 attrCmnAcctime = 0x00001000
78 type attrList struct {
88 //sysnb pipe(p *[2]int32) (err error)
90 func Pipe(p []int) (err error) {
101 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
102 var _p0 unsafe.Pointer
105 _p0 = unsafe.Pointer(&buf[0])
106 bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
108 r0, _, e1 := syscall(funcPC(libc_getfsstat_trampoline), uintptr(_p0), bufsize, uintptr(flags))
116 func libc_getfsstat_trampoline()
118 //go:linkname libc_getfsstat libc_getfsstat
119 //go:cgo_import_dynamic libc_getfsstat getfsstat "/usr/lib/libSystem.B.dylib"
121 func setattrlistTimes(path string, times []Timespec) error {
122 _p0, err := BytePtrFromString(path)
127 var attrList attrList
128 attrList.bitmapCount = attrBitMapCount
129 attrList.CommonAttr = attrCmnModtime | attrCmnAcctime
131 // order is mtime, atime: the opposite of Chtimes
132 attributes := [2]Timespec{times[1], times[0]}
134 _, _, e1 := syscall6(
135 funcPC(libc_setattrlist_trampoline),
136 uintptr(unsafe.Pointer(_p0)),
137 uintptr(unsafe.Pointer(&attrList)),
138 uintptr(unsafe.Pointer(&attributes)),
139 uintptr(unsafe.Sizeof(attributes)),
149 func libc_setattrlist_trampoline()
151 //go:linkname libc_setattrlist libc_setattrlist
152 //go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib"
154 func utimensat(dirfd int, path string, times *[2]Timespec, flag int) error {
155 // Darwin doesn't support SYS_UTIMENSAT
163 //sys kill(pid int, signum int, posix int) (err error)
165 func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1) }
170 //sys Access(path string, mode uint32) (err error)
171 //sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
172 //sys Chdir(path string) (err error)
173 //sys Chflags(path string, flags int) (err error)
174 //sys Chmod(path string, mode uint32) (err error)
175 //sys Chown(path string, uid int, gid int) (err error)
176 //sys Chroot(path string) (err error)
177 //sys Close(fd int) (err error)
178 //sys closedir(dir uintptr) (err error)
179 //sys Dup(fd int) (nfd int, err error)
180 //sys Dup2(from int, to int) (err error)
181 //sys Exchangedata(path1 string, path2 string, options int) (err error)
182 //sys Fchdir(fd int) (err error)
183 //sys Fchflags(fd int, flags int) (err error)
184 //sys Fchmod(fd int, mode uint32) (err error)
185 //sys Fchown(fd int, uid int, gid int) (err error)
186 //sys Flock(fd int, how int) (err error)
187 //sys Fpathconf(fd int, name int) (val int, err error)
188 //sys Fsync(fd int) (err error)
189 // Fsync is not called for os.File.Sync(). Please see internal/poll/fd_fsync_darwin.go
190 //sys Ftruncate(fd int, length int64) (err error)
191 //sys Getdtablesize() (size int)
192 //sysnb Getegid() (egid int)
193 //sysnb Geteuid() (uid int)
194 //sysnb Getgid() (gid int)
195 //sysnb Getpgid(pid int) (pgid int, err error)
196 //sysnb Getpgrp() (pgrp int)
197 //sysnb Getpid() (pid int)
198 //sysnb Getppid() (ppid int)
199 //sys Getpriority(which int, who int) (prio int, err error)
200 //sysnb Getrlimit(which int, lim *Rlimit) (err error)
201 //sysnb Getrusage(who int, rusage *Rusage) (err error)
202 //sysnb Getsid(pid int) (sid int, err error)
203 //sysnb Getuid() (uid int)
204 //sysnb Issetugid() (tainted bool)
205 //sys Kqueue() (fd int, err error)
206 //sys Lchown(path string, uid int, gid int) (err error)
207 //sys Link(path string, link string) (err error)
208 //sys Listen(s int, backlog int) (err error)
209 //sys Mkdir(path string, mode uint32) (err error)
210 //sys Mkfifo(path string, mode uint32) (err error)
211 //sys Mknod(path string, mode uint32, dev int) (err error)
212 //sys Mlock(b []byte) (err error)
213 //sys Mlockall(flags int) (err error)
214 //sys Mprotect(b []byte, prot int) (err error)
215 //sys Munlock(b []byte) (err error)
216 //sys Munlockall() (err error)
217 //sys Open(path string, mode int, perm uint32) (fd int, err error)
218 //sys Pathconf(path string, name int) (val int, err error)
219 //sys Pread(fd int, p []byte, offset int64) (n int, err error)
220 //sys Pwrite(fd int, p []byte, offset int64) (n int, err error)
221 //sys read(fd int, p []byte) (n int, err error)
222 //sys readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno)
223 //sys Readlink(path string, buf []byte) (n int, err error)
224 //sys Rename(from string, to string) (err error)
225 //sys Revoke(path string) (err error)
226 //sys Rmdir(path string) (err error)
227 //sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_lseek
228 //sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
229 //sys Setegid(egid int) (err error)
230 //sysnb Seteuid(euid int) (err error)
231 //sysnb Setgid(gid int) (err error)
232 //sys Setlogin(name string) (err error)
233 //sysnb Setpgid(pid int, pgid int) (err error)
234 //sys Setpriority(which int, who int, prio int) (err error)
235 //sys Setprivexec(flag int) (err error)
236 //sysnb Setregid(rgid int, egid int) (err error)
237 //sysnb Setreuid(ruid int, euid int) (err error)
238 //sysnb Setrlimit(which int, lim *Rlimit) (err error)
239 //sysnb Setsid() (pid int, err error)
240 //sysnb Settimeofday(tp *Timeval) (err error)
241 //sysnb Setuid(uid int) (err error)
242 //sys Symlink(path string, link string) (err error)
243 //sys Sync() (err error)
244 //sys Truncate(path string, length int64) (err error)
245 //sys Umask(newmask int) (oldmask int)
246 //sys Undelete(path string) (err error)
247 //sys Unlink(path string) (err error)
248 //sys Unmount(path string, flags int) (err error)
249 //sys write(fd int, p []byte) (n int, err error)
250 //sys writev(fd int, iovecs []Iovec) (cnt uintptr, err error)
251 //sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
252 //sys munmap(addr uintptr, length uintptr) (err error)
253 //sysnb fork() (pid int, err error)
254 //sysnb ioctl(fd int, req int, arg int) (err error)
255 //sysnb ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_ioctl
256 //sysnb execve(path *byte, argv **byte, envp **byte) (err error)
257 //sysnb exit(res int) (err error)
258 //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
259 //sys fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_fcntl
260 //sys unlinkat(fd int, path string, flags int) (err error)
261 //sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error)
262 //sys getcwd(buf []byte) (n int, err error)
265 execveDarwin = execve
268 func fdopendir(fd int) (dir uintptr, err error) {
269 r0, _, e1 := syscallPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0)
277 func libc_fdopendir_trampoline()
279 //go:linkname libc_fdopendir libc_fdopendir
280 //go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib"
282 func readlen(fd int, buf *byte, nbuf int) (n int, err error) {
283 r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
291 func writelen(fd int, buf *byte, nbuf int) (n int, err error) {
292 r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
300 func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
301 // Simulate Getdirentries using fdopendir/readdir_r/closedir.
302 // We store the number of entries to skip in the seek
303 // offset of fd. See issue #31368.
304 // It's not the full required semantics, but should handle the case
305 // of calling Getdirentries or ReadDirent repeatedly.
306 // It won't handle assigning the results of lseek to *basep, or handle
307 // the directory being edited underfoot.
308 skip, err := Seek(fd, 0, 1 /* SEEK_CUR */)
313 // We need to duplicate the incoming file descriptor
314 // because the caller expects to retain control of it, but
315 // fdopendir expects to take control of its argument.
316 // Just Dup'ing the file descriptor is not enough, as the
317 // result shares underlying state. Use openat to make a really
318 // new file descriptor referring to the same directory.
319 fd2, err := openat(fd, ".", O_RDONLY, 0)
323 d, err := fdopendir(fd2)
334 e := readdir_r(d, &entry, &entryp)
336 return n, errnoErr(e)
346 reclen := int(entry.Reclen)
347 if reclen > len(buf) {
348 // Not enough room. Return for now.
349 // The counter will let us know where we should start up again.
350 // Note: this strategy for suspending in the middle and
351 // restarting is O(n^2) in the length of the directory. Oh well.
354 // Copy entry into return buffer.
359 }{ptr: unsafe.Pointer(&entry), siz: reclen, cap: reclen}
360 copy(buf, *(*[]byte)(unsafe.Pointer(&s)))
365 // Set the seek offset of the input fd to record
366 // how many files we've already returned.
367 _, err = Seek(fd, cnt, 0 /* SEEK_SET */)
375 // Implemented in the runtime package (runtime/sys_darwin.go)
376 func syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
377 func syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
378 func syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
379 func rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
380 func rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
381 func syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
383 // Find the entry point for f. See comments in runtime/proc.go for the
384 // function of the same name.
386 func funcPC(f func()) uintptr {
387 return **(**uintptr)(unsafe.Pointer(&f))