mirror of
https://github.com/restic/restic.git
synced 2024-08-23 12:50:45 +02:00
504 lines
13 KiB
Go
504 lines
13 KiB
Go
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// 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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func direntIno(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
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}
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func direntReclen(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
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}
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func direntNamlen(buf []byte) (uint64, bool) {
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return readInt(buf, unsafe.Offsetof(Dirent{}.Namlen), unsafe.Sizeof(Dirent{}.Namlen))
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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 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 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 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 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 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 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 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)
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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 Symlinkat(oldpath string, newdirfd int, newpath 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 Unlinkat(dirfd int, path string, flags int) (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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||
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// Waitid
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||
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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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||
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// Msgrcv
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||
|
// Shmat
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||
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// Shmctl
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||
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// Shmdt
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||
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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
|
||
|
// 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
|
||
|
// 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
|
||
|
// Mlockall
|
||
|
// Munlockall
|
||
|
// __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
|
||
|
// Msync_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
|