| // 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. |
| |
| // Darwin 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 [12]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{}.Ino), unsafe.Sizeof(Dirent{}.Ino)) |
| } |
| |
| 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 PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) } |
| func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) } |
| |
| const ( |
| attrBitMapCount = 5 |
| attrCmnModtime = 0x00000400 |
| attrCmnAcctime = 0x00001000 |
| ) |
| |
| type attrList struct { |
| bitmapCount uint16 |
| _ uint16 |
| CommonAttr uint32 |
| VolAttr uint32 |
| DirAttr uint32 |
| FileAttr uint32 |
| Forkattr uint32 |
| } |
| |
| //sysnb pipe(p *[2]int32) (err error) |
| |
| func Pipe(p []int) (err error) { |
| if len(p) != 2 { |
| return EINVAL |
| } |
| var q [2]int32 |
| err = pipe(&q) |
| if err == nil { |
| p[0] = int(q[0]) |
| p[1] = int(q[1]) |
| } |
| 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(funcPC(libc_getfsstat_trampoline), uintptr(_p0), bufsize, uintptr(flags)) |
| n = int(r0) |
| if e1 != 0 { |
| err = e1 |
| } |
| return |
| } |
| |
| func libc_getfsstat_trampoline() |
| |
| //go:linkname libc_getfsstat libc_getfsstat |
| //go:cgo_import_dynamic libc_getfsstat getfsstat "/usr/lib/libSystem.B.dylib" |
| |
| func setattrlistTimes(path string, times []Timespec) error { |
| _p0, err := BytePtrFromString(path) |
| if err != nil { |
| return err |
| } |
| |
| var attrList attrList |
| attrList.bitmapCount = attrBitMapCount |
| attrList.CommonAttr = attrCmnModtime | attrCmnAcctime |
| |
| // order is mtime, atime: the opposite of Chtimes |
| attributes := [2]Timespec{times[1], times[0]} |
| const options = 0 |
| _, _, e1 := syscall6( |
| funcPC(libc_setattrlist_trampoline), |
| uintptr(unsafe.Pointer(_p0)), |
| uintptr(unsafe.Pointer(&attrList)), |
| uintptr(unsafe.Pointer(&attributes)), |
| uintptr(unsafe.Sizeof(attributes)), |
| uintptr(options), |
| 0, |
| ) |
| if e1 != 0 { |
| return e1 |
| } |
| return nil |
| } |
| |
| func libc_setattrlist_trampoline() |
| |
| //go:linkname libc_setattrlist libc_setattrlist |
| //go:cgo_import_dynamic libc_setattrlist setattrlist "/usr/lib/libSystem.B.dylib" |
| |
| func utimensat(dirfd int, path string, times *[2]Timespec, flag int) error { |
| // Darwin doesn't support SYS_UTIMENSAT |
| return ENOSYS |
| } |
| |
| /* |
| * Wrapped |
| */ |
| |
| //sys kill(pid int, signum int, posix int) (err error) |
| |
| func Kill(pid int, signum Signal) (err error) { return kill(pid, int(signum), 1) } |
| |
| /* |
| * 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 closedir(dir uintptr) (err error) |
| //sys Dup(fd int) (nfd int, err error) |
| //sys Dup2(from int, to int) (err error) |
| //sys Exchangedata(path1 string, path2 string, options 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 Fsync(fd int) (err error) |
| // Fsync is not called for os.File.Sync(). Please see internal/poll/fd_fsync_darwin.go |
| //sys Ftruncate(fd int, length int64) (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 Getuid() (uid int) |
| //sysnb Issetugid() (tainted bool) |
| //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 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 Mlock(b []byte) (err error) |
| //sys Mlockall(flags int) (err error) |
| //sys Mprotect(b []byte, prot int) (err error) |
| //sys Munlock(b []byte) (err error) |
| //sys Munlockall() (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 readdir_r(dir uintptr, entry *Dirent, result **Dirent) (res Errno) |
| //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) |
| //sys 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) |
| //sys Setprivexec(flag 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 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 writev(fd int, iovecs []Iovec) (cnt uintptr, 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) |
| //sysnb fork() (pid int, err error) |
| //sysnb ioctl(fd int, req int, arg int) (err error) |
| //sysnb ioctlPtr(fd int, req uint, arg unsafe.Pointer) (err error) = SYS_ioctl |
| //sysnb execve(path *byte, argv **byte, envp **byte) (err error) |
| //sysnb exit(res int) (err error) |
| //sys sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) |
| //sys fcntlPtr(fd int, cmd int, arg unsafe.Pointer) (val int, err error) = SYS_fcntl |
| //sys unlinkat(fd int, path string, flags int) (err error) |
| //sys openat(fd int, path string, flags int, perm uint32) (fdret int, err error) |
| //sys getcwd(buf []byte) (n int, err error) |
| |
| func init() { |
| execveDarwin = execve |
| } |
| |
| func fdopendir(fd int) (dir uintptr, err error) { |
| r0, _, e1 := syscallPtr(funcPC(libc_fdopendir_trampoline), uintptr(fd), 0, 0) |
| dir = uintptr(r0) |
| if e1 != 0 { |
| err = errnoErr(e1) |
| } |
| return |
| } |
| |
| func libc_fdopendir_trampoline() |
| |
| //go:linkname libc_fdopendir libc_fdopendir |
| //go:cgo_import_dynamic libc_fdopendir fdopendir "/usr/lib/libSystem.B.dylib" |
| |
| func readlen(fd int, buf *byte, nbuf int) (n int, err error) { |
| r0, _, e1 := syscall(funcPC(libc_read_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf)) |
| n = int(r0) |
| if e1 != 0 { |
| err = errnoErr(e1) |
| } |
| return |
| } |
| |
| func writelen(fd int, buf *byte, nbuf int) (n int, err error) { |
| r0, _, e1 := syscall(funcPC(libc_write_trampoline), uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf)) |
| n = int(r0) |
| if e1 != 0 { |
| err = errnoErr(e1) |
| } |
| return |
| } |
| |
| func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) { |
| // Simulate Getdirentries using fdopendir/readdir_r/closedir. |
| // We store the number of entries to skip in the seek |
| // offset of fd. See issue #31368. |
| // It's not the full required semantics, but should handle the case |
| // of calling Getdirentries or ReadDirent repeatedly. |
| // It won't handle assigning the results of lseek to *basep, or handle |
| // the directory being edited underfoot. |
| skip, err := Seek(fd, 0, 1 /* SEEK_CUR */) |
| if err != nil { |
| return 0, err |
| } |
| |
| // We need to duplicate the incoming file descriptor |
| // because the caller expects to retain control of it, but |
| // fdopendir expects to take control of its argument. |
| // Just Dup'ing the file descriptor is not enough, as the |
| // result shares underlying state. Use openat to make a really |
| // new file descriptor referring to the same directory. |
| fd2, err := openat(fd, ".", O_RDONLY, 0) |
| if err != nil { |
| return 0, err |
| } |
| d, err := fdopendir(fd2) |
| if err != nil { |
| Close(fd2) |
| return 0, err |
| } |
| defer closedir(d) |
| |
| var cnt int64 |
| for { |
| var entry Dirent |
| var entryp *Dirent |
| e := readdir_r(d, &entry, &entryp) |
| if e != 0 { |
| return n, errnoErr(e) |
| } |
| if entryp == nil { |
| break |
| } |
| if skip > 0 { |
| skip-- |
| cnt++ |
| continue |
| } |
| reclen := int(entry.Reclen) |
| if reclen > len(buf) { |
| // Not enough room. Return for now. |
| // The counter will let us know where we should start up again. |
| // Note: this strategy for suspending in the middle and |
| // restarting is O(n^2) in the length of the directory. Oh well. |
| break |
| } |
| // Copy entry into return buffer. |
| s := struct { |
| ptr unsafe.Pointer |
| siz int |
| cap int |
| }{ptr: unsafe.Pointer(&entry), siz: reclen, cap: reclen} |
| copy(buf, *(*[]byte)(unsafe.Pointer(&s))) |
| buf = buf[reclen:] |
| n += reclen |
| cnt++ |
| } |
| // Set the seek offset of the input fd to record |
| // how many files we've already returned. |
| _, err = Seek(fd, cnt, 0 /* SEEK_SET */) |
| if err != nil { |
| return n, err |
| } |
| |
| return n, nil |
| } |
| |
| // Implemented in the runtime package (runtime/sys_darwin.go) |
| func syscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| func syscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| func syscall6X(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| func rawSyscall(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| func rawSyscall6(fn, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) |
| func syscallPtr(fn, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) |
| |
| // Find the entry point for f. See comments in runtime/proc.go for the |
| // function of the same name. |
| //go:nosplit |
| func funcPC(f func()) uintptr { |
| return **(**uintptr)(unsafe.Pointer(&f)) |
| } |