439407aa2c
Only compile the __go_ptrace varargs shim on Linux to avoid compilation failures on some other platforms. The C ptrace function is not entirely portable (e.g., NetBSD has `int data` instead of `void* data`), and so far Linux is the only platform that needs the varargs shim. Additionally, make the types in the ptrace and raw_ptrace function declarations match. This makes it more clear that the only difference between the two is that calls via the former are allowed to block while calls via the latter are not. Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/263517
132 lines
3.8 KiB
Go
132 lines
3.8 KiB
Go
// 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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// +build hurd linux
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// glibc library calls.
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package syscall
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import (
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"internal/race"
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"unsafe"
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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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//__go_openat(dirfd _C_int, path *byte, flags _C_int, mode Mode_t) _C_int
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//sys futimesat(dirfd int, path *byte, times *[2]Timeval) (err error)
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//futimesat(dirfd _C_int, path *byte, times *[2]Timeval) _C_int
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func Futimesat(dirfd int, path string, tv []Timeval) (err error) {
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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, StringBytePtr(path), (*[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 GNU/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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//sys accept4(fd int, sa *RawSockaddrAny, len *Socklen_t, flags int) (nfd int, err error)
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//accept4(fd _C_int, sa *RawSockaddrAny, len *Socklen_t, flags _C_int) _C_int
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func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) {
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var rsa RawSockaddrAny
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var len Socklen_t = SizeofSockaddrAny
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nfd, err = accept4(fd, &rsa, &len, flags)
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if err != nil {
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return -1, nil, err
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}
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sa, err = anyToSockaddr(&rsa)
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if err != nil {
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Close(nfd)
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return -1, nil, err
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}
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return nfd, sa, nil
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}
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//sysnb Dup3(oldfd int, newfd int, flags int) (err error)
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//dup3(oldfd _C_int, newfd _C_int, flags _C_int) _C_int
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//sys Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
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//faccessat(dirfd _C_int, pathname *byte, mode _C_int, flags _C_int) _C_int
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//sys Fallocate(fd int, mode uint32, off int64, len int64) (err error)
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//fallocate(fd _C_int, mode _C_int, offset Offset_t, len Offset_t) _C_int
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//sys Fchmodat(dirfd int, path string, mode uint32, flags int) (err error)
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//fchmodat(dirfd _C_int, pathname *byte, mode Mode_t, flags _C_int) _C_int
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//sys Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
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//fchownat(dirfd _C_int, path *byte, owner Uid_t, group Gid_t, flags _C_int) _C_int
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//sys Flock(fd int, how int) (err error)
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//flock(fd _C_int, how _C_int) _C_int
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func Getdents(fd int, buf []byte) (n int, err error) {
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var p *byte
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if len(buf) > 0 {
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p = &buf[0]
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} else {
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p = (*byte)(unsafe.Pointer(&_zero))
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}
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s := SYS_GETDENTS64
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if s == 0 {
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s = SYS_GETDENTS
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}
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r1, _, errno := Syscall(uintptr(s), uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(buf)))
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n = int(r1)
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if n < 0 {
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err = errno
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}
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return
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}
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func ReadDirent(fd int, buf []byte) (n int, err error) {
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return Getdents(fd, buf)
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}
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//sys Mkdirat(dirfd int, path string, mode uint32) (err error)
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//mkdirat(dirfd _C_int, path *byte, mode Mode_t) _C_int
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//sys Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
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//mknodat(dirfd _C_int, path *byte, mode Mode_t, dev _dev_t) _C_int
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//sysnb pipe2(p *[2]_C_int, flags int) (err error)
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//pipe2(p *[2]_C_int, flags _C_int) _C_int
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func Pipe2(p []int, flags 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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var pp [2]_C_int
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err = pipe2(&pp, flags)
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p[0] = int(pp[0])
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p[1] = int(pp[1])
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return
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}
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//sys sendfile(outfd int, infd int, offset *Offset_t, count int) (written int, err error)
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//sendfile64(outfd _C_int, infd _C_int, offset *Offset_t, count Size_t) Ssize_t
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func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
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if race.Enabled {
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race.ReleaseMerge(unsafe.Pointer(&ioSync))
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}
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var soff Offset_t
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var psoff *Offset_t
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if offset != nil {
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soff = Offset_t(*offset)
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psoff = &soff
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}
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written, err = sendfile(outfd, infd, psoff, count)
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if offset != nil {
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*offset = int64(soff)
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}
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return
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}
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//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
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//sync_file_range(fd _C_int, off Offset_t, n Offset_t, flags _C_uint) _C_int
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