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28 KiB
1111 lines
28 KiB
// Copyright 2009 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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|
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// Linux 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 |
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// wrap it in our own nicer implementation. |
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package unix |
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import ( |
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"syscall" |
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"unsafe" |
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) |
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|
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/* |
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* Wrapped |
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*/ |
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|
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func Access(path string, mode uint32) (err error) { |
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return Faccessat(AT_FDCWD, path, mode, 0) |
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} |
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func Chmod(path string, mode uint32) (err error) { |
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return Fchmodat(AT_FDCWD, path, mode, 0) |
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} |
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func Chown(path string, uid int, gid int) (err error) { |
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return Fchownat(AT_FDCWD, path, uid, gid, 0) |
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} |
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func Creat(path string, mode uint32) (fd int, err error) { |
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return Open(path, O_CREAT|O_WRONLY|O_TRUNC, mode) |
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} |
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//sys Linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error) |
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func Link(oldpath string, newpath string) (err error) { |
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return Linkat(AT_FDCWD, oldpath, AT_FDCWD, newpath, 0) |
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} |
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func Mkdir(path string, mode uint32) (err error) { |
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return Mkdirat(AT_FDCWD, path, mode) |
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} |
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func Mknod(path string, mode uint32, dev int) (err error) { |
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return Mknodat(AT_FDCWD, path, mode, dev) |
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} |
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func Open(path string, mode int, perm uint32) (fd int, err error) { |
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return openat(AT_FDCWD, path, mode|O_LARGEFILE, perm) |
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} |
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//sys openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) |
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func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) { |
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return openat(dirfd, path, flags|O_LARGEFILE, mode) |
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} |
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//sys ppoll(fds *PollFd, nfds int, timeout *Timespec, sigmask *Sigset_t) (n int, err error) |
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func Ppoll(fds []PollFd, timeout *Timespec, sigmask *Sigset_t) (n int, err error) { |
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if len(fds) == 0 { |
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return ppoll(nil, 0, timeout, sigmask) |
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} |
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return ppoll(&fds[0], len(fds), timeout, sigmask) |
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} |
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//sys Readlinkat(dirfd int, path string, buf []byte) (n int, err error) |
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func Readlink(path string, buf []byte) (n int, err error) { |
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return Readlinkat(AT_FDCWD, path, buf) |
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} |
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func Rename(oldpath string, newpath string) (err error) { |
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return Renameat(AT_FDCWD, oldpath, AT_FDCWD, newpath) |
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} |
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func Rmdir(path string) error { |
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return Unlinkat(AT_FDCWD, path, AT_REMOVEDIR) |
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} |
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//sys Symlinkat(oldpath string, newdirfd int, newpath string) (err error) |
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func Symlink(oldpath string, newpath string) (err error) { |
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return Symlinkat(oldpath, AT_FDCWD, newpath) |
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} |
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func Unlink(path string) error { |
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return Unlinkat(AT_FDCWD, path, 0) |
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} |
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//sys Unlinkat(dirfd int, path string, flags int) (err error) |
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//sys utimes(path string, times *[2]Timeval) (err error) |
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func Utimes(path string, tv []Timeval) error { |
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if tv == nil { |
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err := utimensat(AT_FDCWD, path, nil, 0) |
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if err != ENOSYS { |
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return err |
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} |
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return utimes(path, nil) |
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} |
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if len(tv) != 2 { |
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return EINVAL |
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} |
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var ts [2]Timespec |
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ts[0] = NsecToTimespec(TimevalToNsec(tv[0])) |
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ts[1] = NsecToTimespec(TimevalToNsec(tv[1])) |
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err := utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) |
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if err != ENOSYS { |
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return err |
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} |
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return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
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} |
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//sys utimensat(dirfd int, path string, times *[2]Timespec, flags int) (err error) |
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func UtimesNano(path string, ts []Timespec) error { |
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if ts == nil { |
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err := utimensat(AT_FDCWD, path, nil, 0) |
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if err != ENOSYS { |
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return err |
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} |
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return utimes(path, nil) |
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} |
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if len(ts) != 2 { |
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return EINVAL |
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} |
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err := utimensat(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 0) |
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if err != ENOSYS { |
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return err |
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} |
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// If the utimensat syscall isn't available (utimensat was added to Linux |
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// in 2.6.22, Released, 8 July 2007) then fall back to utimes |
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var tv [2]Timeval |
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for i := 0; i < 2; i++ { |
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tv[i] = NsecToTimeval(TimespecToNsec(ts[i])) |
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} |
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return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
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} |
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func UtimesNanoAt(dirfd int, path string, ts []Timespec, flags int) error { |
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if ts == nil { |
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return utimensat(dirfd, path, nil, flags) |
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} |
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if len(ts) != 2 { |
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return EINVAL |
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} |
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return utimensat(dirfd, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), flags) |
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} |
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//sys futimesat(dirfd int, path *byte, times *[2]Timeval) (err error) |
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func Futimesat(dirfd int, path string, tv []Timeval) error { |
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pathp, err := BytePtrFromString(path) |
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if err != nil { |
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return err |
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} |
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if tv == nil { |
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return futimesat(dirfd, pathp, nil) |
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} |
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if len(tv) != 2 { |
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return EINVAL |
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} |
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return futimesat(dirfd, pathp, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
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} |
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func Futimes(fd int, tv []Timeval) (err error) { |
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// Believe it or not, this is the best we can do on Linux |
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// (and is what glibc does). |
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return Utimes("/proc/self/fd/"+itoa(fd), tv) |
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} |
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const ImplementsGetwd = true |
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//sys Getcwd(buf []byte) (n int, err error) |
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func Getwd() (wd string, err error) { |
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var buf [PathMax]byte |
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n, err := Getcwd(buf[0:]) |
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if err != nil { |
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return "", err |
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} |
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// Getcwd returns the number of bytes written to buf, including the NUL. |
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if n < 1 || n > len(buf) || buf[n-1] != 0 { |
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return "", EINVAL |
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} |
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return string(buf[0 : n-1]), nil |
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} |
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func Getgroups() (gids []int, err error) { |
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n, err := getgroups(0, nil) |
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if err != nil { |
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return nil, err |
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} |
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if n == 0 { |
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return nil, nil |
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} |
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// Sanity check group count. Max is 1<<16 on Linux. |
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if n < 0 || n > 1<<20 { |
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return nil, EINVAL |
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} |
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a := make([]_Gid_t, n) |
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n, err = getgroups(n, &a[0]) |
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if err != nil { |
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return nil, err |
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} |
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gids = make([]int, n) |
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for i, v := range a[0:n] { |
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gids[i] = int(v) |
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} |
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return |
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} |
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func Setgroups(gids []int) (err error) { |
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if len(gids) == 0 { |
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return setgroups(0, nil) |
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} |
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a := make([]_Gid_t, len(gids)) |
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for i, v := range gids { |
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a[i] = _Gid_t(v) |
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} |
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return setgroups(len(a), &a[0]) |
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} |
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type WaitStatus uint32 |
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// Wait status is 7 bits at bottom, either 0 (exited), |
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// 0x7F (stopped), or a signal number that caused an exit. |
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// The 0x80 bit is whether there was a core dump. |
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// An extra number (exit code, signal causing a stop) |
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// is in the high bits. At least that's the idea. |
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// There are various irregularities. For example, the |
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// "continued" status is 0xFFFF, distinguishing itself |
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// from stopped via the core dump bit. |
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|
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const ( |
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mask = 0x7F |
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core = 0x80 |
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exited = 0x00 |
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stopped = 0x7F |
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shift = 8 |
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) |
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func (w WaitStatus) Exited() bool { return w&mask == exited } |
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func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != exited } |
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func (w WaitStatus) Stopped() bool { return w&0xFF == stopped } |
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func (w WaitStatus) Continued() bool { return w == 0xFFFF } |
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func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } |
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func (w WaitStatus) ExitStatus() int { |
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if !w.Exited() { |
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return -1 |
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} |
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return int(w>>shift) & 0xFF |
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} |
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func (w WaitStatus) Signal() syscall.Signal { |
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if !w.Signaled() { |
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return -1 |
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} |
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return syscall.Signal(w & mask) |
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} |
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func (w WaitStatus) StopSignal() syscall.Signal { |
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if !w.Stopped() { |
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return -1 |
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} |
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return syscall.Signal(w>>shift) & 0xFF |
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} |
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func (w WaitStatus) TrapCause() int { |
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if w.StopSignal() != SIGTRAP { |
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return -1 |
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} |
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return int(w>>shift) >> 8 |
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} |
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//sys wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) |
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func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (wpid int, err error) { |
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var status _C_int |
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wpid, err = wait4(pid, &status, options, rusage) |
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if wstatus != nil { |
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*wstatus = WaitStatus(status) |
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} |
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return |
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} |
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func Mkfifo(path string, mode uint32) (err error) { |
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return Mknod(path, mode|S_IFIFO, 0) |
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} |
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func (sa *SockaddrInet4) sockaddr() (unsafe.Pointer, _Socklen, error) { |
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if sa.Port < 0 || sa.Port > 0xFFFF { |
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return nil, 0, EINVAL |
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} |
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sa.raw.Family = AF_INET |
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p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
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p[0] = byte(sa.Port >> 8) |
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p[1] = byte(sa.Port) |
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for i := 0; i < len(sa.Addr); i++ { |
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sa.raw.Addr[i] = sa.Addr[i] |
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} |
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return unsafe.Pointer(&sa.raw), SizeofSockaddrInet4, nil |
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} |
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func (sa *SockaddrInet6) sockaddr() (unsafe.Pointer, _Socklen, error) { |
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if sa.Port < 0 || sa.Port > 0xFFFF { |
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return nil, 0, EINVAL |
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} |
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sa.raw.Family = AF_INET6 |
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p := (*[2]byte)(unsafe.Pointer(&sa.raw.Port)) |
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p[0] = byte(sa.Port >> 8) |
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p[1] = byte(sa.Port) |
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sa.raw.Scope_id = sa.ZoneId |
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for i := 0; i < len(sa.Addr); i++ { |
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sa.raw.Addr[i] = sa.Addr[i] |
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} |
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return unsafe.Pointer(&sa.raw), SizeofSockaddrInet6, nil |
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} |
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func (sa *SockaddrUnix) sockaddr() (unsafe.Pointer, _Socklen, error) { |
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name := sa.Name |
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n := len(name) |
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if n >= len(sa.raw.Path) { |
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return nil, 0, EINVAL |
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} |
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sa.raw.Family = AF_UNIX |
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for i := 0; i < n; i++ { |
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sa.raw.Path[i] = int8(name[i]) |
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} |
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// length is family (uint16), name, NUL. |
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sl := _Socklen(2) |
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if n > 0 { |
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sl += _Socklen(n) + 1 |
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} |
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if sa.raw.Path[0] == '@' { |
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sa.raw.Path[0] = 0 |
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// Don't count trailing NUL for abstract address. |
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sl-- |
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} |
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return unsafe.Pointer(&sa.raw), sl, nil |
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} |
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type SockaddrLinklayer struct { |
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Protocol uint16 |
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Ifindex int |
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Hatype uint16 |
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Pkttype uint8 |
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Halen uint8 |
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Addr [8]byte |
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raw RawSockaddrLinklayer |
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} |
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func (sa *SockaddrLinklayer) sockaddr() (unsafe.Pointer, _Socklen, error) { |
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if sa.Ifindex < 0 || sa.Ifindex > 0x7fffffff { |
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return nil, 0, EINVAL |
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} |
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sa.raw.Family = AF_PACKET |
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sa.raw.Protocol = sa.Protocol |
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sa.raw.Ifindex = int32(sa.Ifindex) |
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sa.raw.Hatype = sa.Hatype |
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sa.raw.Pkttype = sa.Pkttype |
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sa.raw.Halen = sa.Halen |
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for i := 0; i < len(sa.Addr); i++ { |
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sa.raw.Addr[i] = sa.Addr[i] |
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} |
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return unsafe.Pointer(&sa.raw), SizeofSockaddrLinklayer, nil |
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} |
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type SockaddrNetlink struct { |
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Family uint16 |
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Pad uint16 |
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Pid uint32 |
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Groups uint32 |
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raw RawSockaddrNetlink |
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} |
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func (sa *SockaddrNetlink) sockaddr() (unsafe.Pointer, _Socklen, error) { |
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sa.raw.Family = AF_NETLINK |
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sa.raw.Pad = sa.Pad |
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sa.raw.Pid = sa.Pid |
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sa.raw.Groups = sa.Groups |
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return unsafe.Pointer(&sa.raw), SizeofSockaddrNetlink, nil |
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} |
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type SockaddrHCI struct { |
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Dev uint16 |
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Channel uint16 |
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raw RawSockaddrHCI |
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} |
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func (sa *SockaddrHCI) sockaddr() (unsafe.Pointer, _Socklen, error) { |
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sa.raw.Family = AF_BLUETOOTH |
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sa.raw.Dev = sa.Dev |
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sa.raw.Channel = sa.Channel |
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return unsafe.Pointer(&sa.raw), SizeofSockaddrHCI, nil |
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} |
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func anyToSockaddr(rsa *RawSockaddrAny) (Sockaddr, error) { |
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switch rsa.Addr.Family { |
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case AF_NETLINK: |
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pp := (*RawSockaddrNetlink)(unsafe.Pointer(rsa)) |
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sa := new(SockaddrNetlink) |
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sa.Family = pp.Family |
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sa.Pad = pp.Pad |
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sa.Pid = pp.Pid |
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sa.Groups = pp.Groups |
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return sa, nil |
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case AF_PACKET: |
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pp := (*RawSockaddrLinklayer)(unsafe.Pointer(rsa)) |
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sa := new(SockaddrLinklayer) |
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sa.Protocol = pp.Protocol |
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sa.Ifindex = int(pp.Ifindex) |
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sa.Hatype = pp.Hatype |
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sa.Pkttype = pp.Pkttype |
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sa.Halen = pp.Halen |
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for i := 0; i < len(sa.Addr); i++ { |
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sa.Addr[i] = pp.Addr[i] |
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} |
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return sa, nil |
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case AF_UNIX: |
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pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) |
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sa := new(SockaddrUnix) |
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if pp.Path[0] == 0 { |
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// "Abstract" Unix domain socket. |
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// Rewrite leading NUL as @ for textual display. |
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// (This is the standard convention.) |
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// Not friendly to overwrite in place, |
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// but the callers below don't care. |
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pp.Path[0] = '@' |
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} |
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|
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// Assume path ends at NUL. |
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// This is not technically the Linux semantics for |
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// abstract Unix domain sockets--they are supposed |
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// to be uninterpreted fixed-size binary blobs--but |
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// everyone uses this convention. |
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n := 0 |
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for n < len(pp.Path) && pp.Path[n] != 0 { |
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n++ |
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} |
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bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n] |
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sa.Name = string(bytes) |
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return sa, nil |
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|
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case AF_INET: |
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pp := (*RawSockaddrInet4)(unsafe.Pointer(rsa)) |
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sa := new(SockaddrInet4) |
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p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
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sa.Port = int(p[0])<<8 + int(p[1]) |
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for i := 0; i < len(sa.Addr); i++ { |
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sa.Addr[i] = pp.Addr[i] |
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} |
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return sa, nil |
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|
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case AF_INET6: |
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pp := (*RawSockaddrInet6)(unsafe.Pointer(rsa)) |
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sa := new(SockaddrInet6) |
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p := (*[2]byte)(unsafe.Pointer(&pp.Port)) |
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sa.Port = int(p[0])<<8 + int(p[1]) |
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sa.ZoneId = pp.Scope_id |
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for i := 0; i < len(sa.Addr); i++ { |
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sa.Addr[i] = pp.Addr[i] |
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} |
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return sa, nil |
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} |
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return nil, EAFNOSUPPORT |
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} |
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|
|
func Accept(fd int) (nfd int, sa Sockaddr, err error) { |
|
var rsa RawSockaddrAny |
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var len _Socklen = SizeofSockaddrAny |
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nfd, err = accept(fd, &rsa, &len) |
|
if err != nil { |
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return |
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} |
|
sa, err = anyToSockaddr(&rsa) |
|
if err != nil { |
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Close(nfd) |
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nfd = 0 |
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} |
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return |
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} |
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|
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func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) { |
|
var rsa RawSockaddrAny |
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var len _Socklen = SizeofSockaddrAny |
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nfd, err = accept4(fd, &rsa, &len, flags) |
|
if err != nil { |
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return |
|
} |
|
if len > SizeofSockaddrAny { |
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panic("RawSockaddrAny too small") |
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} |
|
sa, err = anyToSockaddr(&rsa) |
|
if err != nil { |
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Close(nfd) |
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nfd = 0 |
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} |
|
return |
|
} |
|
|
|
func Getsockname(fd int) (sa Sockaddr, err error) { |
|
var rsa RawSockaddrAny |
|
var len _Socklen = SizeofSockaddrAny |
|
if err = getsockname(fd, &rsa, &len); err != nil { |
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return |
|
} |
|
return anyToSockaddr(&rsa) |
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} |
|
|
|
func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) { |
|
vallen := _Socklen(4) |
|
err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen) |
|
return value, err |
|
} |
|
|
|
func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) { |
|
var value IPMreq |
|
vallen := _Socklen(SizeofIPMreq) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
|
return &value, err |
|
} |
|
|
|
func GetsockoptIPMreqn(fd, level, opt int) (*IPMreqn, error) { |
|
var value IPMreqn |
|
vallen := _Socklen(SizeofIPMreqn) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
|
return &value, err |
|
} |
|
|
|
func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) { |
|
var value IPv6Mreq |
|
vallen := _Socklen(SizeofIPv6Mreq) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
|
return &value, err |
|
} |
|
|
|
func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) { |
|
var value IPv6MTUInfo |
|
vallen := _Socklen(SizeofIPv6MTUInfo) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
|
return &value, err |
|
} |
|
|
|
func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) { |
|
var value ICMPv6Filter |
|
vallen := _Socklen(SizeofICMPv6Filter) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
|
return &value, err |
|
} |
|
|
|
func GetsockoptUcred(fd, level, opt int) (*Ucred, error) { |
|
var value Ucred |
|
vallen := _Socklen(SizeofUcred) |
|
err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) |
|
return &value, err |
|
} |
|
|
|
func SetsockoptIPMreqn(fd, level, opt int, mreq *IPMreqn) (err error) { |
|
return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq)) |
|
} |
|
|
|
func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { |
|
var msg Msghdr |
|
var rsa RawSockaddrAny |
|
msg.Name = (*byte)(unsafe.Pointer(&rsa)) |
|
msg.Namelen = uint32(SizeofSockaddrAny) |
|
var iov Iovec |
|
if len(p) > 0 { |
|
iov.Base = (*byte)(unsafe.Pointer(&p[0])) |
|
iov.SetLen(len(p)) |
|
} |
|
var dummy byte |
|
if len(oob) > 0 { |
|
// receive at least one normal byte |
|
if len(p) == 0 { |
|
iov.Base = &dummy |
|
iov.SetLen(1) |
|
} |
|
msg.Control = (*byte)(unsafe.Pointer(&oob[0])) |
|
msg.SetControllen(len(oob)) |
|
} |
|
msg.Iov = &iov |
|
msg.Iovlen = 1 |
|
if n, err = recvmsg(fd, &msg, flags); err != nil { |
|
return |
|
} |
|
oobn = int(msg.Controllen) |
|
recvflags = int(msg.Flags) |
|
// source address is only specified if the socket is unconnected |
|
if rsa.Addr.Family != AF_UNSPEC { |
|
from, err = anyToSockaddr(&rsa) |
|
} |
|
return |
|
} |
|
|
|
func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { |
|
_, err = SendmsgN(fd, p, oob, to, flags) |
|
return |
|
} |
|
|
|
func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { |
|
var ptr unsafe.Pointer |
|
var salen _Socklen |
|
if to != nil { |
|
var err error |
|
ptr, salen, err = to.sockaddr() |
|
if err != nil { |
|
return 0, err |
|
} |
|
} |
|
var msg Msghdr |
|
msg.Name = (*byte)(unsafe.Pointer(ptr)) |
|
msg.Namelen = uint32(salen) |
|
var iov Iovec |
|
if len(p) > 0 { |
|
iov.Base = (*byte)(unsafe.Pointer(&p[0])) |
|
iov.SetLen(len(p)) |
|
} |
|
var dummy byte |
|
if len(oob) > 0 { |
|
// send at least one normal byte |
|
if len(p) == 0 { |
|
iov.Base = &dummy |
|
iov.SetLen(1) |
|
} |
|
msg.Control = (*byte)(unsafe.Pointer(&oob[0])) |
|
msg.SetControllen(len(oob)) |
|
} |
|
msg.Iov = &iov |
|
msg.Iovlen = 1 |
|
if n, err = sendmsg(fd, &msg, flags); err != nil { |
|
return 0, err |
|
} |
|
if len(oob) > 0 && len(p) == 0 { |
|
n = 0 |
|
} |
|
return n, nil |
|
} |
|
|
|
// BindToDevice binds the socket associated with fd to device. |
|
func BindToDevice(fd int, device string) (err error) { |
|
return SetsockoptString(fd, SOL_SOCKET, SO_BINDTODEVICE, device) |
|
} |
|
|
|
//sys ptrace(request int, pid int, addr uintptr, data uintptr) (err error) |
|
|
|
func ptracePeek(req int, pid int, addr uintptr, out []byte) (count int, err error) { |
|
// The peek requests are machine-size oriented, so we wrap it |
|
// to retrieve arbitrary-length data. |
|
|
|
// The ptrace syscall differs from glibc's ptrace. |
|
// Peeks returns the word in *data, not as the return value. |
|
|
|
var buf [sizeofPtr]byte |
|
|
|
// Leading edge. PEEKTEXT/PEEKDATA don't require aligned |
|
// access (PEEKUSER warns that it might), but if we don't |
|
// align our reads, we might straddle an unmapped page |
|
// boundary and not get the bytes leading up to the page |
|
// boundary. |
|
n := 0 |
|
if addr%sizeofPtr != 0 { |
|
err = ptrace(req, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) |
|
if err != nil { |
|
return 0, err |
|
} |
|
n += copy(out, buf[addr%sizeofPtr:]) |
|
out = out[n:] |
|
} |
|
|
|
// Remainder. |
|
for len(out) > 0 { |
|
// We use an internal buffer to guarantee alignment. |
|
// It's not documented if this is necessary, but we're paranoid. |
|
err = ptrace(req, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) |
|
if err != nil { |
|
return n, err |
|
} |
|
copied := copy(out, buf[0:]) |
|
n += copied |
|
out = out[copied:] |
|
} |
|
|
|
return n, nil |
|
} |
|
|
|
func PtracePeekText(pid int, addr uintptr, out []byte) (count int, err error) { |
|
return ptracePeek(PTRACE_PEEKTEXT, pid, addr, out) |
|
} |
|
|
|
func PtracePeekData(pid int, addr uintptr, out []byte) (count int, err error) { |
|
return ptracePeek(PTRACE_PEEKDATA, pid, addr, out) |
|
} |
|
|
|
func ptracePoke(pokeReq int, peekReq int, pid int, addr uintptr, data []byte) (count int, err error) { |
|
// As for ptracePeek, we need to align our accesses to deal |
|
// with the possibility of straddling an invalid page. |
|
|
|
// Leading edge. |
|
n := 0 |
|
if addr%sizeofPtr != 0 { |
|
var buf [sizeofPtr]byte |
|
err = ptrace(peekReq, pid, addr-addr%sizeofPtr, uintptr(unsafe.Pointer(&buf[0]))) |
|
if err != nil { |
|
return 0, err |
|
} |
|
n += copy(buf[addr%sizeofPtr:], data) |
|
word := *((*uintptr)(unsafe.Pointer(&buf[0]))) |
|
err = ptrace(pokeReq, pid, addr-addr%sizeofPtr, word) |
|
if err != nil { |
|
return 0, err |
|
} |
|
data = data[n:] |
|
} |
|
|
|
// Interior. |
|
for len(data) > sizeofPtr { |
|
word := *((*uintptr)(unsafe.Pointer(&data[0]))) |
|
err = ptrace(pokeReq, pid, addr+uintptr(n), word) |
|
if err != nil { |
|
return n, err |
|
} |
|
n += sizeofPtr |
|
data = data[sizeofPtr:] |
|
} |
|
|
|
// Trailing edge. |
|
if len(data) > 0 { |
|
var buf [sizeofPtr]byte |
|
err = ptrace(peekReq, pid, addr+uintptr(n), uintptr(unsafe.Pointer(&buf[0]))) |
|
if err != nil { |
|
return n, err |
|
} |
|
copy(buf[0:], data) |
|
word := *((*uintptr)(unsafe.Pointer(&buf[0]))) |
|
err = ptrace(pokeReq, pid, addr+uintptr(n), word) |
|
if err != nil { |
|
return n, err |
|
} |
|
n += len(data) |
|
} |
|
|
|
return n, nil |
|
} |
|
|
|
func PtracePokeText(pid int, addr uintptr, data []byte) (count int, err error) { |
|
return ptracePoke(PTRACE_POKETEXT, PTRACE_PEEKTEXT, pid, addr, data) |
|
} |
|
|
|
func PtracePokeData(pid int, addr uintptr, data []byte) (count int, err error) { |
|
return ptracePoke(PTRACE_POKEDATA, PTRACE_PEEKDATA, pid, addr, data) |
|
} |
|
|
|
func PtraceGetRegs(pid int, regsout *PtraceRegs) (err error) { |
|
return ptrace(PTRACE_GETREGS, pid, 0, uintptr(unsafe.Pointer(regsout))) |
|
} |
|
|
|
func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) { |
|
return ptrace(PTRACE_SETREGS, pid, 0, uintptr(unsafe.Pointer(regs))) |
|
} |
|
|
|
func PtraceSetOptions(pid int, options int) (err error) { |
|
return ptrace(PTRACE_SETOPTIONS, pid, 0, uintptr(options)) |
|
} |
|
|
|
func PtraceGetEventMsg(pid int) (msg uint, err error) { |
|
var data _C_long |
|
err = ptrace(PTRACE_GETEVENTMSG, pid, 0, uintptr(unsafe.Pointer(&data))) |
|
msg = uint(data) |
|
return |
|
} |
|
|
|
func PtraceCont(pid int, signal int) (err error) { |
|
return ptrace(PTRACE_CONT, pid, 0, uintptr(signal)) |
|
} |
|
|
|
func PtraceSyscall(pid int, signal int) (err error) { |
|
return ptrace(PTRACE_SYSCALL, pid, 0, uintptr(signal)) |
|
} |
|
|
|
func PtraceSingleStep(pid int) (err error) { return ptrace(PTRACE_SINGLESTEP, pid, 0, 0) } |
|
|
|
func PtraceAttach(pid int) (err error) { return ptrace(PTRACE_ATTACH, pid, 0, 0) } |
|
|
|
func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0) } |
|
|
|
//sys reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error) |
|
|
|
func Reboot(cmd int) (err error) { |
|
return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "") |
|
} |
|
|
|
func clen(n []byte) int { |
|
for i := 0; i < len(n); i++ { |
|
if n[i] == 0 { |
|
return i |
|
} |
|
} |
|
return len(n) |
|
} |
|
|
|
func ReadDirent(fd int, buf []byte) (n int, err error) { |
|
return Getdents(fd, buf) |
|
} |
|
|
|
func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) { |
|
origlen := len(buf) |
|
count = 0 |
|
for max != 0 && len(buf) > 0 { |
|
dirent := (*Dirent)(unsafe.Pointer(&buf[0])) |
|
buf = buf[dirent.Reclen:] |
|
if dirent.Ino == 0 { // File absent in directory. |
|
continue |
|
} |
|
bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0])) |
|
var name = string(bytes[0:clen(bytes[:])]) |
|
if name == "." || name == ".." { // Useless names |
|
continue |
|
} |
|
max-- |
|
count++ |
|
names = append(names, name) |
|
} |
|
return origlen - len(buf), count, names |
|
} |
|
|
|
//sys mount(source string, target string, fstype string, flags uintptr, data *byte) (err error) |
|
|
|
func Mount(source string, target string, fstype string, flags uintptr, data string) (err error) { |
|
// Certain file systems get rather angry and EINVAL if you give |
|
// them an empty string of data, rather than NULL. |
|
if data == "" { |
|
return mount(source, target, fstype, flags, nil) |
|
} |
|
datap, err := BytePtrFromString(data) |
|
if err != nil { |
|
return err |
|
} |
|
return mount(source, target, fstype, flags, datap) |
|
} |
|
|
|
// Sendto |
|
// Recvfrom |
|
// Socketpair |
|
|
|
/* |
|
* Direct access |
|
*/ |
|
//sys Acct(path string) (err error) |
|
//sys Adjtimex(buf *Timex) (state int, err error) |
|
//sys Chdir(path string) (err error) |
|
//sys Chroot(path string) (err error) |
|
//sys ClockGettime(clockid int32, time *Timespec) (err error) |
|
//sys Close(fd int) (err error) |
|
//sys Dup(oldfd int) (fd int, err error) |
|
//sys Dup3(oldfd int, newfd int, flags int) (err error) |
|
//sysnb EpollCreate(size int) (fd int, err error) |
|
//sysnb EpollCreate1(flag int) (fd int, err error) |
|
//sysnb EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) |
|
//sys Exit(code int) = SYS_EXIT_GROUP |
|
//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error) |
|
//sys Fallocate(fd int, mode uint32, off int64, len int64) (err error) |
|
//sys Fchdir(fd int) (err error) |
|
//sys Fchmod(fd int, mode uint32) (err error) |
|
//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) |
|
//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) |
|
//sys fcntl(fd int, cmd int, arg int) (val int, err error) |
|
//sys Fdatasync(fd int) (err error) |
|
//sys Flock(fd int, how int) (err error) |
|
//sys Fsync(fd int) (err error) |
|
//sys Getdents(fd int, buf []byte) (n int, err error) = SYS_GETDENTS64 |
|
//sysnb Getpgid(pid int) (pgid int, err error) |
|
|
|
func Getpgrp() (pid int) { |
|
pid, _ = Getpgid(0) |
|
return |
|
} |
|
|
|
//sysnb Getpid() (pid int) |
|
//sysnb Getppid() (ppid int) |
|
//sys Getpriority(which int, who int) (prio int, err error) |
|
//sysnb Getrusage(who int, rusage *Rusage) (err error) |
|
//sysnb Getsid(pid int) (sid int, err error) |
|
//sysnb Gettid() (tid int) |
|
//sys Getxattr(path string, attr string, dest []byte) (sz int, err error) |
|
//sys InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) |
|
//sysnb InotifyInit1(flags int) (fd int, err error) |
|
//sysnb InotifyRmWatch(fd int, watchdesc uint32) (success int, err error) |
|
//sysnb Kill(pid int, sig syscall.Signal) (err error) |
|
//sys Klogctl(typ int, buf []byte) (n int, err error) = SYS_SYSLOG |
|
//sys Listxattr(path string, dest []byte) (sz int, err error) |
|
//sys Mkdirat(dirfd int, path string, mode uint32) (err error) |
|
//sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error) |
|
//sys Nanosleep(time *Timespec, leftover *Timespec) (err error) |
|
//sys PivotRoot(newroot string, putold string) (err error) = SYS_PIVOT_ROOT |
|
//sysnb prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) = SYS_PRLIMIT64 |
|
//sys Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (err error) |
|
//sys read(fd int, p []byte) (n int, err error) |
|
//sys Removexattr(path string, attr string) (err error) |
|
//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) |
|
//sys Setdomainname(p []byte) (err error) |
|
//sys Sethostname(p []byte) (err error) |
|
//sysnb Setpgid(pid int, pgid int) (err error) |
|
//sysnb Setsid() (pid int, err error) |
|
//sysnb Settimeofday(tv *Timeval) (err error) |
|
//sys Setns(fd int, nstype int) (err error) |
|
|
|
// issue 1435. |
|
// On linux Setuid and Setgid only affects the current thread, not the process. |
|
// This does not match what most callers expect so we must return an error |
|
// here rather than letting the caller think that the call succeeded. |
|
|
|
func Setuid(uid int) (err error) { |
|
return EOPNOTSUPP |
|
} |
|
|
|
func Setgid(uid int) (err error) { |
|
return EOPNOTSUPP |
|
} |
|
|
|
//sys Setpriority(which int, who int, prio int) (err error) |
|
//sys Setxattr(path string, attr string, data []byte, flags int) (err error) |
|
//sys Sync() |
|
//sysnb Sysinfo(info *Sysinfo_t) (err error) |
|
//sys Tee(rfd int, wfd int, len int, flags int) (n int64, err error) |
|
//sysnb Tgkill(tgid int, tid int, sig syscall.Signal) (err error) |
|
//sysnb Times(tms *Tms) (ticks uintptr, err error) |
|
//sysnb Umask(mask int) (oldmask int) |
|
//sysnb Uname(buf *Utsname) (err error) |
|
//sys Unmount(target string, flags int) (err error) = SYS_UMOUNT2 |
|
//sys Unshare(flags int) (err error) |
|
//sys Ustat(dev int, ubuf *Ustat_t) (err error) |
|
//sys write(fd int, p []byte) (n int, err error) |
|
//sys exitThread(code int) (err error) = SYS_EXIT |
|
//sys readlen(fd int, p *byte, np int) (n int, err error) = SYS_READ |
|
//sys writelen(fd int, p *byte, np int) (n int, err error) = SYS_WRITE |
|
|
|
// mmap varies by architecture; see syscall_linux_*.go. |
|
//sys munmap(addr uintptr, length uintptr) (err error) |
|
|
|
var mapper = &mmapper{ |
|
active: make(map[*byte][]byte), |
|
mmap: mmap, |
|
munmap: munmap, |
|
} |
|
|
|
func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { |
|
return mapper.Mmap(fd, offset, length, prot, flags) |
|
} |
|
|
|
func Munmap(b []byte) (err error) { |
|
return mapper.Munmap(b) |
|
} |
|
|
|
//sys Madvise(b []byte, advice int) (err error) |
|
//sys Mprotect(b []byte, prot int) (err error) |
|
//sys Mlock(b []byte) (err error) |
|
//sys Munlock(b []byte) (err error) |
|
//sys Mlockall(flags int) (err error) |
|
//sys Munlockall() (err error) |
|
|
|
/* |
|
* Unimplemented |
|
*/ |
|
// AddKey |
|
// AfsSyscall |
|
// Alarm |
|
// ArchPrctl |
|
// Brk |
|
// Capget |
|
// Capset |
|
// ClockGetres |
|
// ClockNanosleep |
|
// ClockSettime |
|
// Clone |
|
// CreateModule |
|
// DeleteModule |
|
// EpollCtlOld |
|
// EpollPwait |
|
// EpollWaitOld |
|
// Eventfd |
|
// Execve |
|
// Fgetxattr |
|
// Flistxattr |
|
// Fork |
|
// Fremovexattr |
|
// Fsetxattr |
|
// Futex |
|
// GetKernelSyms |
|
// GetMempolicy |
|
// GetRobustList |
|
// GetThreadArea |
|
// Getitimer |
|
// Getpmsg |
|
// IoCancel |
|
// IoDestroy |
|
// IoGetevents |
|
// IoSetup |
|
// IoSubmit |
|
// Ioctl |
|
// IoprioGet |
|
// IoprioSet |
|
// KexecLoad |
|
// Keyctl |
|
// Lgetxattr |
|
// Llistxattr |
|
// LookupDcookie |
|
// Lremovexattr |
|
// Lsetxattr |
|
// Mbind |
|
// MigratePages |
|
// Mincore |
|
// ModifyLdt |
|
// Mount |
|
// MovePages |
|
// Mprotect |
|
// MqGetsetattr |
|
// MqNotify |
|
// MqOpen |
|
// MqTimedreceive |
|
// MqTimedsend |
|
// MqUnlink |
|
// Mremap |
|
// Msgctl |
|
// Msgget |
|
// Msgrcv |
|
// Msgsnd |
|
// Msync |
|
// Newfstatat |
|
// Nfsservctl |
|
// Personality |
|
// Pselect6 |
|
// Ptrace |
|
// Putpmsg |
|
// QueryModule |
|
// Quotactl |
|
// Readahead |
|
// Readv |
|
// RemapFilePages |
|
// RequestKey |
|
// RestartSyscall |
|
// RtSigaction |
|
// RtSigpending |
|
// RtSigprocmask |
|
// RtSigqueueinfo |
|
// RtSigreturn |
|
// RtSigsuspend |
|
// RtSigtimedwait |
|
// SchedGetPriorityMax |
|
// SchedGetPriorityMin |
|
// SchedGetaffinity |
|
// SchedGetparam |
|
// SchedGetscheduler |
|
// SchedRrGetInterval |
|
// SchedSetaffinity |
|
// SchedSetparam |
|
// SchedYield |
|
// Security |
|
// Semctl |
|
// Semget |
|
// Semop |
|
// Semtimedop |
|
// SetMempolicy |
|
// SetRobustList |
|
// SetThreadArea |
|
// SetTidAddress |
|
// Shmat |
|
// Shmctl |
|
// Shmdt |
|
// Shmget |
|
// Sigaltstack |
|
// Signalfd |
|
// Swapoff |
|
// Swapon |
|
// Sysfs |
|
// TimerCreate |
|
// TimerDelete |
|
// TimerGetoverrun |
|
// TimerGettime |
|
// TimerSettime |
|
// Timerfd |
|
// Tkill (obsolete) |
|
// Tuxcall |
|
// Umount2 |
|
// Uselib |
|
// Utimensat |
|
// Vfork |
|
// Vhangup |
|
// Vmsplice |
|
// Vserver |
|
// Waitid |
|
// _Sysctl
|
|
|