690 lines
19 KiB
Go
690 lines
19 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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"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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// SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
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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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//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, errors.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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if err := getattrlist(_p0, unsafe.Pointer(&attrList), unsafe.Pointer(&attrBuf[0]), uintptr(len(attrBuf)), int(options)); err != nil {
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return nil, err
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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, errors.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, errors.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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//sys getattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error)
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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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return getfsstat(_p0, bufsize, flags)
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}
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func xattrPointer(dest []byte) *byte {
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// It's only when dest is set to NULL that the OS X implementations of
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// getxattr() and listxattr() return the current sizes of the named attributes.
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// An empty byte array is not sufficient. To maintain the same behaviour as the
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// linux implementation, we wrap around the system calls and pass in NULL when
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// dest is empty.
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var destp *byte
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if len(dest) > 0 {
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destp = &dest[0]
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}
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return destp
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}
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//sys getxattr(path string, attr string, dest *byte, size int, position uint32, options int) (sz int, err error)
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func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
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return getxattr(path, attr, xattrPointer(dest), len(dest), 0, 0)
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}
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func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) {
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return getxattr(link, attr, xattrPointer(dest), len(dest), 0, XATTR_NOFOLLOW)
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}
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//sys fgetxattr(fd int, attr string, dest *byte, size int, position uint32, options int) (sz int, err error)
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func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) {
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return fgetxattr(fd, attr, xattrPointer(dest), len(dest), 0, 0)
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}
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//sys setxattr(path string, attr string, data *byte, size int, position uint32, options int) (err error)
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func Setxattr(path string, attr string, data []byte, flags int) (err error) {
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// The parameters for the OS X implementation vary slightly compared to the
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// linux system call, specifically the position parameter:
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//
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// linux:
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// int setxattr(
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// const char *path,
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// const char *name,
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// const void *value,
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// size_t size,
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// int flags
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// );
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//
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// darwin:
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// int setxattr(
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// const char *path,
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// const char *name,
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// void *value,
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// size_t size,
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// u_int32_t position,
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// int options
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// );
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//
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// position specifies the offset within the extended attribute. In the
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// current implementation, only the resource fork extended attribute makes
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// use of this argument. For all others, position is reserved. We simply
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// default to setting it to zero.
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return setxattr(path, attr, xattrPointer(data), len(data), 0, flags)
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}
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func Lsetxattr(link string, attr string, data []byte, flags int) (err error) {
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return setxattr(link, attr, xattrPointer(data), len(data), 0, flags|XATTR_NOFOLLOW)
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}
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//sys fsetxattr(fd int, attr string, data *byte, size int, position uint32, options int) (err error)
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func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) {
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return fsetxattr(fd, attr, xattrPointer(data), len(data), 0, 0)
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}
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//sys removexattr(path string, attr string, options int) (err error)
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func Removexattr(path string, attr string) (err error) {
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// We wrap around and explicitly zero out the options provided to the OS X
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// implementation of removexattr, we do so for interoperability with the
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// linux variant.
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return removexattr(path, attr, 0)
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}
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func Lremovexattr(link string, attr string) (err error) {
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return removexattr(link, attr, XATTR_NOFOLLOW)
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}
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//sys fremovexattr(fd int, attr string, options int) (err error)
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func Fremovexattr(fd int, attr string) (err error) {
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return fremovexattr(fd, attr, 0)
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}
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//sys listxattr(path string, dest *byte, size int, options int) (sz int, err error)
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func Listxattr(path string, dest []byte) (sz int, err error) {
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return listxattr(path, xattrPointer(dest), len(dest), 0)
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}
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func Llistxattr(link string, dest []byte) (sz int, err error) {
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return listxattr(link, xattrPointer(dest), len(dest), XATTR_NOFOLLOW)
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}
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//sys flistxattr(fd int, dest *byte, size int, options int) (sz int, err error)
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func Flistxattr(fd int, dest []byte) (sz int, err error) {
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return flistxattr(fd, xattrPointer(dest), len(dest), 0)
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}
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func setattrlistTimes(path string, times []Timespec, flags int) error {
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_p0, err := BytePtrFromString(path)
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if err != nil {
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return err
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}
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var attrList attrList
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attrList.bitmapCount = ATTR_BIT_MAP_COUNT
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attrList.CommonAttr = ATTR_CMN_MODTIME | ATTR_CMN_ACCTIME
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// order is mtime, atime: the opposite of Chtimes
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attributes := [2]Timespec{times[1], times[0]}
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options := 0
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if flags&AT_SYMLINK_NOFOLLOW != 0 {
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options |= FSOPT_NOFOLLOW
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}
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return setattrlist(
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_p0,
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unsafe.Pointer(&attrList),
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unsafe.Pointer(&attributes),
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unsafe.Sizeof(attributes),
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options)
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}
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//sys setattrlist(path *byte, list unsafe.Pointer, buf unsafe.Pointer, size uintptr, options int) (err error)
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func utimensat(dirfd int, path string, times *[2]Timespec, flags int) error {
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// Darwin doesn't support SYS_UTIMENSAT
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return ENOSYS
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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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//sys ioctl(fd int, req uint, arg uintptr) (err error)
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// ioctl itself should not be exposed directly, but additional get/set
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// functions for specific types are permissible.
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// IoctlSetInt performs an ioctl operation which sets an integer value
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// on fd, using the specified request number.
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func IoctlSetInt(fd int, req uint, value int) error {
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return ioctl(fd, req, uintptr(value))
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}
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func ioctlSetWinsize(fd int, req uint, value *Winsize) error {
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return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
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}
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func ioctlSetTermios(fd int, req uint, value *Termios) error {
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return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
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}
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// IoctlGetInt performs an ioctl operation which gets an integer value
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// from fd, using the specified request number.
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func IoctlGetInt(fd int, req uint) (int, error) {
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var value int
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
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return value, err
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}
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func IoctlGetWinsize(fd int, req uint) (*Winsize, error) {
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var value Winsize
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
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return &value, err
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}
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func IoctlGetTermios(fd int, req uint) (*Termios, error) {
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var value Termios
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
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return &value, err
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}
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func Uname(uname *Utsname) error {
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mib := []_C_int{CTL_KERN, KERN_OSTYPE}
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n := unsafe.Sizeof(uname.Sysname)
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if err := sysctl(mib, &uname.Sysname[0], &n, nil, 0); err != nil {
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return err
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}
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mib = []_C_int{CTL_KERN, KERN_HOSTNAME}
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n = unsafe.Sizeof(uname.Nodename)
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if err := sysctl(mib, &uname.Nodename[0], &n, nil, 0); err != nil {
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return err
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}
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mib = []_C_int{CTL_KERN, KERN_OSRELEASE}
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n = unsafe.Sizeof(uname.Release)
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if err := sysctl(mib, &uname.Release[0], &n, nil, 0); err != nil {
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return err
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}
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mib = []_C_int{CTL_KERN, KERN_VERSION}
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n = unsafe.Sizeof(uname.Version)
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if err := sysctl(mib, &uname.Version[0], &n, nil, 0); err != nil {
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return err
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}
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// The version might have newlines or tabs in it, convert them to
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// spaces.
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for i, b := range uname.Version {
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if b == '\n' || b == '\t' {
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if i == len(uname.Version)-1 {
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uname.Version[i] = 0
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} else {
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uname.Version[i] = ' '
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}
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}
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}
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mib = []_C_int{CTL_HW, HW_MACHINE}
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n = unsafe.Sizeof(uname.Machine)
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if err := sysctl(mib, &uname.Machine[0], &n, nil, 0); err != nil {
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return err
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}
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return nil
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}
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func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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if raceenabled {
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raceReleaseMerge(unsafe.Pointer(&ioSync))
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}
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var length = int64(count)
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err = sendfile(infd, outfd, *offset, &length, nil, 0)
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written = int(length)
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return
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}
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//sys sendfile(infd int, outfd int, offset int64, len *int64, hdtr unsafe.Pointer, flags int) (err error)
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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 ClockGettime(clockid int32, time *Timespec) (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 Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
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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 Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
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//sys Fchown(fd int, uid int, gid int) (err error)
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//sys Fchownat(dirfd int, path string, uid int, gid int, flags 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 Fsync(fd int) (err error)
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//sys Ftruncate(fd int, length int64) (err error)
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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 Linkat(pathfd int, path string, linkfd int, link string, flags int) (err error)
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//sys Listen(s int, backlog int) (err error)
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//sys Mkdir(path string, mode uint32) (err error)
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//sys Mkdirat(dirfd int, 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 Open(path string, mode int, perm uint32) (fd int, err error)
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//sys Openat(dirfd int, 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 Readlinkat(dirfd int, 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 Renameat(fromfd int, from string, tofd int, to string) (err error)
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//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 Symlinkat(oldpath string, newdirfd int, newpath 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 Unlinkat(dirfd int, path string, flags int) (err error)
|
|
//sys Unmount(path string, flags int) (err error)
|
|
//sys write(fd int, p []byte) (n int, 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)
|
|
//sys readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
|
|
//sys writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
|
|
|
|
/*
|
|
* Unimplemented
|
|
*/
|
|
// Profil
|
|
// Sigaction
|
|
// Sigprocmask
|
|
// Getlogin
|
|
// Sigpending
|
|
// Sigaltstack
|
|
// Ioctl
|
|
// Reboot
|
|
// Execve
|
|
// Vfork
|
|
// Sbrk
|
|
// Sstk
|
|
// Ovadvise
|
|
// Mincore
|
|
// Setitimer
|
|
// Swapon
|
|
// Select
|
|
// Sigsuspend
|
|
// Readv
|
|
// Writev
|
|
// Nfssvc
|
|
// Getfh
|
|
// Quotactl
|
|
// Mount
|
|
// Csops
|
|
// Waitid
|
|
// Add_profil
|
|
// Kdebug_trace
|
|
// Sigreturn
|
|
// Atsocket
|
|
// Kqueue_from_portset_np
|
|
// Kqueue_portset
|
|
// Getattrlist
|
|
// Setattrlist
|
|
// Getdirentriesattr
|
|
// Searchfs
|
|
// Delete
|
|
// Copyfile
|
|
// Watchevent
|
|
// Waitevent
|
|
// Modwatch
|
|
// Fsctl
|
|
// Initgroups
|
|
// Posix_spawn
|
|
// Nfsclnt
|
|
// Fhopen
|
|
// Minherit
|
|
// Semsys
|
|
// Msgsys
|
|
// Shmsys
|
|
// Semctl
|
|
// Semget
|
|
// Semop
|
|
// Msgctl
|
|
// Msgget
|
|
// Msgsnd
|
|
// Msgrcv
|
|
// Shmat
|
|
// Shmctl
|
|
// Shmdt
|
|
// Shmget
|
|
// Shm_open
|
|
// Shm_unlink
|
|
// Sem_open
|
|
// Sem_close
|
|
// Sem_unlink
|
|
// Sem_wait
|
|
// Sem_trywait
|
|
// Sem_post
|
|
// Sem_getvalue
|
|
// Sem_init
|
|
// Sem_destroy
|
|
// Open_extended
|
|
// Umask_extended
|
|
// Stat_extended
|
|
// Lstat_extended
|
|
// Fstat_extended
|
|
// Chmod_extended
|
|
// Fchmod_extended
|
|
// Access_extended
|
|
// Settid
|
|
// Gettid
|
|
// Setsgroups
|
|
// Getsgroups
|
|
// Setwgroups
|
|
// Getwgroups
|
|
// Mkfifo_extended
|
|
// Mkdir_extended
|
|
// Identitysvc
|
|
// Shared_region_check_np
|
|
// Shared_region_map_np
|
|
// __pthread_mutex_destroy
|
|
// __pthread_mutex_init
|
|
// __pthread_mutex_lock
|
|
// __pthread_mutex_trylock
|
|
// __pthread_mutex_unlock
|
|
// __pthread_cond_init
|
|
// __pthread_cond_destroy
|
|
// __pthread_cond_broadcast
|
|
// __pthread_cond_signal
|
|
// Setsid_with_pid
|
|
// __pthread_cond_timedwait
|
|
// Aio_fsync
|
|
// Aio_return
|
|
// Aio_suspend
|
|
// Aio_cancel
|
|
// Aio_error
|
|
// Aio_read
|
|
// Aio_write
|
|
// Lio_listio
|
|
// __pthread_cond_wait
|
|
// Iopolicysys
|
|
// __pthread_kill
|
|
// __pthread_sigmask
|
|
// __sigwait
|
|
// __disable_threadsignal
|
|
// __pthread_markcancel
|
|
// __pthread_canceled
|
|
// __semwait_signal
|
|
// Proc_info
|
|
// sendfile
|
|
// Stat64_extended
|
|
// Lstat64_extended
|
|
// Fstat64_extended
|
|
// __pthread_chdir
|
|
// __pthread_fchdir
|
|
// Audit
|
|
// Auditon
|
|
// Getauid
|
|
// Setauid
|
|
// Getaudit
|
|
// Setaudit
|
|
// Getaudit_addr
|
|
// Setaudit_addr
|
|
// Auditctl
|
|
// Bsdthread_create
|
|
// Bsdthread_terminate
|
|
// Stack_snapshot
|
|
// Bsdthread_register
|
|
// Workq_open
|
|
// Workq_ops
|
|
// __mac_execve
|
|
// __mac_syscall
|
|
// __mac_get_file
|
|
// __mac_set_file
|
|
// __mac_get_link
|
|
// __mac_set_link
|
|
// __mac_get_proc
|
|
// __mac_set_proc
|
|
// __mac_get_fd
|
|
// __mac_set_fd
|
|
// __mac_get_pid
|
|
// __mac_get_lcid
|
|
// __mac_get_lctx
|
|
// __mac_set_lctx
|
|
// Setlcid
|
|
// Read_nocancel
|
|
// Write_nocancel
|
|
// Open_nocancel
|
|
// Close_nocancel
|
|
// Wait4_nocancel
|
|
// Recvmsg_nocancel
|
|
// Sendmsg_nocancel
|
|
// Recvfrom_nocancel
|
|
// Accept_nocancel
|
|
// Fcntl_nocancel
|
|
// Select_nocancel
|
|
// Fsync_nocancel
|
|
// Connect_nocancel
|
|
// Sigsuspend_nocancel
|
|
// Readv_nocancel
|
|
// Writev_nocancel
|
|
// Sendto_nocancel
|
|
// Pread_nocancel
|
|
// Pwrite_nocancel
|
|
// Waitid_nocancel
|
|
// Poll_nocancel
|
|
// Msgsnd_nocancel
|
|
// Msgrcv_nocancel
|
|
// Sem_wait_nocancel
|
|
// Aio_suspend_nocancel
|
|
// __sigwait_nocancel
|
|
// __semwait_signal_nocancel
|
|
// __mac_mount
|
|
// __mac_get_mount
|
|
// __mac_getfsstat
|