510 lines
13 KiB
Go
510 lines
13 KiB
Go
// Copyright 2009,2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Darwin system calls.
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// This file is compiled as ordinary Go code,
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// but it is also input to mksyscall,
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// which parses the //sys lines and generates system call stubs.
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// Note that sometimes we use a lowercase //sys name and wrap
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// it in our own nicer implementation, either here or in
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// syscall_bsd.go or syscall_unix.go.
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package unix
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import (
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errorspkg "errors"
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"syscall"
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"unsafe"
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)
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const ImplementsGetwd = true
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func Getwd() (string, error) {
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buf := make([]byte, 2048)
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attrs, err := getAttrList(".", attrList{CommonAttr: attrCmnFullpath}, buf, 0)
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if err == nil && len(attrs) == 1 && len(attrs[0]) >= 2 {
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wd := string(attrs[0])
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// Sanity check that it's an absolute path and ends
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// in a null byte, which we then strip.
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if wd[0] == '/' && wd[len(wd)-1] == 0 {
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return wd[:len(wd)-1], nil
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}
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}
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// If pkg/os/getwd.go gets ENOTSUP, it will fall back to the
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// slow algorithm.
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return "", ENOTSUP
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}
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type SockaddrDatalink struct {
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Len uint8
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Family uint8
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Index uint16
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Type uint8
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Nlen uint8
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Alen uint8
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Slen uint8
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Data [12]int8
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raw RawSockaddrDatalink
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}
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// Translate "kern.hostname" to []_C_int{0,1,2,3}.
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func nametomib(name string) (mib []_C_int, err error) {
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const siz = unsafe.Sizeof(mib[0])
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// NOTE(rsc): It seems strange to set the buffer to have
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// size CTL_MAXNAME+2 but use only CTL_MAXNAME
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// as the size. I don't know why the +2 is here, but the
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// kernel uses +2 for its own implementation of this function.
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// I am scared that if we don't include the +2 here, the kernel
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// will silently write 2 words farther than we specify
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// and we'll get memory corruption.
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var buf [CTL_MAXNAME + 2]_C_int
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n := uintptr(CTL_MAXNAME) * siz
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p := (*byte)(unsafe.Pointer(&buf[0]))
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bytes, err := ByteSliceFromString(name)
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if err != nil {
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return nil, err
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}
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// Magic sysctl: "setting" 0.3 to a string name
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// lets you read back the array of integers form.
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if err = sysctl([]_C_int{0, 3}, p, &n, &bytes[0], uintptr(len(name))); err != nil {
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return nil, err
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}
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return buf[0 : n/siz], nil
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}
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// ParseDirent parses up to max directory entries in buf,
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// appending the names to names. It returns the number
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// bytes consumed from buf, the number of entries added
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// to names, and the new names slice.
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func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) {
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origlen := len(buf)
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for max != 0 && len(buf) > 0 {
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dirent := (*Dirent)(unsafe.Pointer(&buf[0]))
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if dirent.Reclen == 0 {
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buf = nil
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break
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}
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buf = buf[dirent.Reclen:]
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if dirent.Ino == 0 { // File absent in directory.
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continue
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}
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bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0]))
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var name = string(bytes[0:dirent.Namlen])
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if name == "." || name == ".." { // Useless names
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continue
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}
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max--
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count++
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names = append(names, name)
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}
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return origlen - len(buf), count, names
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}
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//sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
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func PtraceAttach(pid int) (err error) { return ptrace(PT_ATTACH, pid, 0, 0) }
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func PtraceDetach(pid int) (err error) { return ptrace(PT_DETACH, pid, 0, 0) }
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const (
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attrBitMapCount = 5
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attrCmnFullpath = 0x08000000
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)
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type attrList struct {
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bitmapCount uint16
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_ uint16
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CommonAttr uint32
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VolAttr uint32
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DirAttr uint32
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FileAttr uint32
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Forkattr uint32
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}
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func getAttrList(path string, attrList attrList, attrBuf []byte, options uint) (attrs [][]byte, err error) {
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if len(attrBuf) < 4 {
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return nil, errorspkg.New("attrBuf too small")
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}
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attrList.bitmapCount = attrBitMapCount
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return nil, err
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}
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_, _, e1 := Syscall6(
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SYS_GETATTRLIST,
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uintptr(unsafe.Pointer(_p0)),
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uintptr(unsafe.Pointer(&attrList)),
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uintptr(unsafe.Pointer(&attrBuf[0])),
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uintptr(len(attrBuf)),
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uintptr(options),
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0,
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)
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if e1 != 0 {
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return nil, e1
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}
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size := *(*uint32)(unsafe.Pointer(&attrBuf[0]))
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// dat is the section of attrBuf that contains valid data,
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// without the 4 byte length header. All attribute offsets
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// are relative to dat.
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dat := attrBuf
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if int(size) < len(attrBuf) {
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dat = dat[:size]
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}
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dat = dat[4:] // remove length prefix
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for i := uint32(0); int(i) < len(dat); {
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header := dat[i:]
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if len(header) < 8 {
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return attrs, errorspkg.New("truncated attribute header")
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}
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datOff := *(*int32)(unsafe.Pointer(&header[0]))
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attrLen := *(*uint32)(unsafe.Pointer(&header[4]))
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if datOff < 0 || uint32(datOff)+attrLen > uint32(len(dat)) {
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return attrs, errorspkg.New("truncated results; attrBuf too small")
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}
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end := uint32(datOff) + attrLen
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attrs = append(attrs, dat[datOff:end])
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i = end
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if r := i % 4; r != 0 {
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i += (4 - r)
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}
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}
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return
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}
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//sysnb pipe() (r int, w int, err error)
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func Pipe(p []int) (err error) {
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if len(p) != 2 {
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return EINVAL
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}
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p[0], p[1], err = pipe()
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return
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}
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func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
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var _p0 unsafe.Pointer
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var bufsize uintptr
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if len(buf) > 0 {
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_p0 = unsafe.Pointer(&buf[0])
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bufsize = unsafe.Sizeof(Statfs_t{}) * uintptr(len(buf))
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}
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r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), bufsize, uintptr(flags))
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n = int(r0)
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if e1 != 0 {
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err = e1
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}
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return
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}
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/*
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* Wrapped
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*/
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//sys kill(pid int, signum int, posix int) (err error)
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func Kill(pid int, signum syscall.Signal) (err error) { return kill(pid, int(signum), 1) }
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/*
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* Exposed directly
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*/
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//sys Access(path string, mode uint32) (err error)
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//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error)
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//sys Chdir(path string) (err error)
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//sys Chflags(path string, flags int) (err error)
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//sys Chmod(path string, mode uint32) (err error)
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//sys Chown(path string, uid int, gid int) (err error)
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//sys Chroot(path string) (err error)
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//sys Close(fd int) (err error)
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//sys Dup(fd int) (nfd int, err error)
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//sys Dup2(from int, to int) (err error)
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//sys Exchangedata(path1 string, path2 string, options int) (err error)
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//sys Exit(code int)
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//sys Fchdir(fd int) (err error)
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//sys Fchflags(fd int, flags int) (err error)
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//sys Fchmod(fd int, mode uint32) (err error)
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//sys Fchown(fd int, uid int, gid int) (err error)
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//sys Flock(fd int, how int) (err error)
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//sys Fpathconf(fd int, name int) (val int, err error)
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//sys Fstat(fd int, stat *Stat_t) (err error) = SYS_FSTAT64
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//sys Fstatfs(fd int, stat *Statfs_t) (err error) = SYS_FSTATFS64
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//sys Fsync(fd int) (err error)
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//sys Ftruncate(fd int, length int64) (err error)
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//sys Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) = SYS_GETDIRENTRIES64
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//sys Getdtablesize() (size int)
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//sysnb Getegid() (egid int)
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//sysnb Geteuid() (uid int)
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//sysnb Getgid() (gid int)
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//sysnb Getpgid(pid int) (pgid int, err error)
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//sysnb Getpgrp() (pgrp int)
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//sysnb Getpid() (pid int)
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//sysnb Getppid() (ppid int)
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//sys Getpriority(which int, who int) (prio int, err error)
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//sysnb Getrlimit(which int, lim *Rlimit) (err error)
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//sysnb Getrusage(who int, rusage *Rusage) (err error)
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//sysnb Getsid(pid int) (sid int, err error)
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//sysnb Getuid() (uid int)
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//sysnb Issetugid() (tainted bool)
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//sys Kqueue() (fd int, err error)
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//sys Lchown(path string, uid int, gid int) (err error)
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//sys Link(path string, link string) (err error)
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//sys Listen(s int, backlog int) (err error)
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//sys Lstat(path string, stat *Stat_t) (err error) = SYS_LSTAT64
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//sys Mkdir(path string, mode uint32) (err error)
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//sys Mkfifo(path string, mode uint32) (err error)
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//sys Mknod(path string, mode uint32, dev int) (err error)
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//sys Mlock(b []byte) (err error)
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//sys Mlockall(flags int) (err error)
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//sys Mprotect(b []byte, prot int) (err error)
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//sys Munlock(b []byte) (err error)
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//sys Munlockall() (err error)
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//sys Open(path string, mode int, perm uint32) (fd int, err error)
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//sys Pathconf(path string, name int) (val int, err error)
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//sys Pread(fd int, p []byte, offset int64) (n int, err error)
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//sys Pwrite(fd int, p []byte, offset int64) (n int, err error)
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//sys read(fd int, p []byte) (n int, err error)
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//sys Readlink(path string, buf []byte) (n int, err error)
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//sys Rename(from string, to string) (err error)
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//sys Revoke(path string) (err error)
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//sys Rmdir(path string) (err error)
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//sys Seek(fd int, offset int64, whence int) (newoffset int64, err error) = SYS_LSEEK
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//sys Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error)
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//sys Setegid(egid int) (err error)
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//sysnb Seteuid(euid int) (err error)
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//sysnb Setgid(gid int) (err error)
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//sys Setlogin(name string) (err error)
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//sysnb Setpgid(pid int, pgid int) (err error)
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//sys Setpriority(which int, who int, prio int) (err error)
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//sys Setprivexec(flag int) (err error)
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//sysnb Setregid(rgid int, egid int) (err error)
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//sysnb Setreuid(ruid int, euid int) (err error)
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//sysnb Setrlimit(which int, lim *Rlimit) (err error)
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//sysnb Setsid() (pid int, err error)
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//sysnb Settimeofday(tp *Timeval) (err error)
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//sysnb Setuid(uid int) (err error)
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//sys Stat(path string, stat *Stat_t) (err error) = SYS_STAT64
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//sys Statfs(path string, stat *Statfs_t) (err error) = SYS_STATFS64
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//sys Symlink(path string, link string) (err error)
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//sys Sync() (err error)
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//sys Truncate(path string, length int64) (err error)
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//sys Umask(newmask int) (oldmask int)
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//sys Undelete(path string) (err error)
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//sys Unlink(path string) (err error)
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//sys Unmount(path string, flags int) (err error)
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//sys write(fd int, p []byte) (n int, err error)
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//sys mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
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//sys munmap(addr uintptr, length uintptr) (err error)
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//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
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//sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
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/*
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* Unimplemented
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*/
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// Profil
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// Sigaction
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// Sigprocmask
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// Getlogin
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// Sigpending
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// Sigaltstack
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// Ioctl
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// Reboot
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// Execve
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// Vfork
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// Sbrk
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// Sstk
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// Ovadvise
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// Mincore
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// Setitimer
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// Swapon
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// Select
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// Sigsuspend
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// Readv
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// Writev
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// Nfssvc
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// Getfh
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// Quotactl
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// Mount
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// Csops
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// Waitid
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// Add_profil
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// Kdebug_trace
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// Sigreturn
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// Mmap
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// Mlock
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// Munlock
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// Atsocket
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// Kqueue_from_portset_np
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// Kqueue_portset
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// Getattrlist
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// Setattrlist
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// Getdirentriesattr
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// Searchfs
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// Delete
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// Copyfile
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// Poll
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// Watchevent
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// Waitevent
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// Modwatch
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// Getxattr
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// Fgetxattr
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// Setxattr
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// Fsetxattr
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// Removexattr
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// Fremovexattr
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// Listxattr
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// Flistxattr
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// Fsctl
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// Initgroups
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// Posix_spawn
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// Nfsclnt
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// Fhopen
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// Minherit
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// Semsys
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// Msgsys
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// Shmsys
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// Semctl
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// Semget
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// Semop
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// Msgctl
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// Msgget
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// Msgsnd
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// Msgrcv
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// Shmat
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// Shmctl
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// Shmdt
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// Shmget
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// Shm_open
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// Shm_unlink
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// Sem_open
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// Sem_close
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// Sem_unlink
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// Sem_wait
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// Sem_trywait
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// Sem_post
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// Sem_getvalue
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// Sem_init
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// Sem_destroy
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// Open_extended
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// Umask_extended
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// Stat_extended
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// Lstat_extended
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// Fstat_extended
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// Chmod_extended
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// Fchmod_extended
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// Access_extended
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// Settid
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// Gettid
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// Setsgroups
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// Getsgroups
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// Setwgroups
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// Getwgroups
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// Mkfifo_extended
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// Mkdir_extended
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// Identitysvc
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// Shared_region_check_np
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// Shared_region_map_np
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// __pthread_mutex_destroy
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// __pthread_mutex_init
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// __pthread_mutex_lock
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// __pthread_mutex_trylock
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// __pthread_mutex_unlock
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// __pthread_cond_init
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// __pthread_cond_destroy
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// __pthread_cond_broadcast
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// __pthread_cond_signal
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// Setsid_with_pid
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// __pthread_cond_timedwait
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// Aio_fsync
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// Aio_return
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// Aio_suspend
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// Aio_cancel
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// Aio_error
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// Aio_read
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// Aio_write
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// Lio_listio
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// __pthread_cond_wait
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// Iopolicysys
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// Mlockall
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// Munlockall
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// __pthread_kill
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// __pthread_sigmask
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// __sigwait
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// __disable_threadsignal
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// __pthread_markcancel
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// __pthread_canceled
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// __semwait_signal
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// Proc_info
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// sendfile
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// Stat64_extended
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// Lstat64_extended
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// Fstat64_extended
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// __pthread_chdir
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// __pthread_fchdir
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// Audit
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// Auditon
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// Getauid
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// Setauid
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// Getaudit
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// Setaudit
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// Getaudit_addr
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// Setaudit_addr
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// Auditctl
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// Bsdthread_create
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// Bsdthread_terminate
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// Stack_snapshot
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// Bsdthread_register
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// Workq_open
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// Workq_ops
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// __mac_execve
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// __mac_syscall
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// __mac_get_file
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// __mac_set_file
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// __mac_get_link
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// __mac_set_link
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// __mac_get_proc
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// __mac_set_proc
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// __mac_get_fd
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// __mac_set_fd
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// __mac_get_pid
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// __mac_get_lcid
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// __mac_get_lctx
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// __mac_set_lctx
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// Setlcid
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// Read_nocancel
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// Write_nocancel
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// Open_nocancel
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// Close_nocancel
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// Wait4_nocancel
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// Recvmsg_nocancel
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// Sendmsg_nocancel
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// Recvfrom_nocancel
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// Accept_nocancel
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// Msync_nocancel
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// Fcntl_nocancel
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// Select_nocancel
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// Fsync_nocancel
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// Connect_nocancel
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// Sigsuspend_nocancel
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// Readv_nocancel
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// Writev_nocancel
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// Sendto_nocancel
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// Pread_nocancel
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// Pwrite_nocancel
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// Waitid_nocancel
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// Poll_nocancel
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// Msgsnd_nocancel
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// Msgrcv_nocancel
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// Sem_wait_nocancel
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// Aio_suspend_nocancel
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// __sigwait_nocancel
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// __semwait_signal_nocancel
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// __mac_mount
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// __mac_get_mount
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// __mac_getfsstat
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