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725 lines
20 KiB
725 lines
20 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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// Solaris 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_solaris.go or syscall_unix.go. |
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package unix |
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import ( |
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"sync/atomic" |
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"syscall" |
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"unsafe" |
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) |
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|
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// Implemented in runtime/syscall_solaris.go. |
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type syscallFunc uintptr |
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func rawSysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) |
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func sysvicall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) |
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type SockaddrDatalink struct { |
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Family uint16 |
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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 [244]int8 |
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raw RawSockaddrDatalink |
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} |
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func clen(n []byte) int { |
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for i := 0; i < len(n); i++ { |
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if n[i] == 0 { |
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return i |
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} |
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} |
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return len(n) |
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} |
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// ParseDirent parses up to max directory entries in buf, |
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// appending the names to names. It returns the number |
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// bytes consumed from buf, the number of entries added |
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// to names, and the new names slice. |
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func ParseDirent(buf []byte, max int, names []string) (consumed int, count int, newnames []string) { |
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origlen := len(buf) |
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for max != 0 && len(buf) > 0 { |
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dirent := (*Dirent)(unsafe.Pointer(&buf[0])) |
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if dirent.Reclen == 0 { |
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buf = nil |
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break |
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} |
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buf = buf[dirent.Reclen:] |
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if dirent.Ino == 0 { // File absent in directory. |
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continue |
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} |
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bytes := (*[10000]byte)(unsafe.Pointer(&dirent.Name[0])) |
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var name = string(bytes[0:clen(bytes[:])]) |
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if name == "." || name == ".." { // Useless names |
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continue |
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} |
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max-- |
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count++ |
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names = append(names, name) |
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} |
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return origlen - len(buf), count, names |
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} |
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//sysnb pipe(p *[2]_C_int) (n 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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var pp [2]_C_int |
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n, err := pipe(&pp) |
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if n != 0 { |
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return err |
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} |
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p[0] = int(pp[0]) |
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p[1] = int(pp[1]) |
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return nil |
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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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//sys getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = libsocket.getsockname |
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func Getsockname(fd int) (sa Sockaddr, err error) { |
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var rsa RawSockaddrAny |
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var len _Socklen = SizeofSockaddrAny |
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if err = getsockname(fd, &rsa, &len); err != nil { |
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return |
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} |
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return anyToSockaddr(&rsa) |
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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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// Getcwd will return an error if it failed for any reason. |
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_, 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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n := clen(buf[:]) |
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if n < 1 { |
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return "", EINVAL |
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} |
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return string(buf[:n]), nil |
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} |
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/* |
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* Wrapped |
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*/ |
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//sysnb getgroups(ngid int, gid *_Gid_t) (n int, err error) |
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//sysnb setgroups(ngid int, gid *_Gid_t) (err error) |
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func Getgroups() (gids []int, err error) { |
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n, err := getgroups(0, nil) |
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// Check for error and sanity check group count. Newer versions of |
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// Solaris allow up to 1024 (NGROUPS_MAX). |
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if n < 0 || n > 1024 { |
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if err != nil { |
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return nil, err |
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} |
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return nil, EINVAL |
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} else if n == 0 { |
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return nil, nil |
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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 n == -1 { |
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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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func ReadDirent(fd int, buf []byte) (n int, err error) { |
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// Final argument is (basep *uintptr) and the syscall doesn't take nil. |
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// TODO(rsc): Can we use a single global basep for all calls? |
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return Getdents(fd, buf, new(uintptr)) |
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} |
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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. |
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type WaitStatus uint32 |
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const ( |
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mask = 0x7F |
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core = 0x80 |
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shift = 8 |
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exited = 0 |
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stopped = 0x7F |
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) |
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func (w WaitStatus) Exited() bool { return w&mask == exited } |
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func (w WaitStatus) ExitStatus() int { |
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if w&mask != exited { |
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return -1 |
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} |
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return int(w >> shift) |
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} |
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func (w WaitStatus) Signaled() bool { return w&mask != stopped && w&mask != 0 } |
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func (w WaitStatus) Signal() syscall.Signal { |
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sig := syscall.Signal(w & mask) |
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if sig == stopped || sig == 0 { |
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return -1 |
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} |
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return sig |
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} |
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func (w WaitStatus) CoreDump() bool { return w.Signaled() && w&core != 0 } |
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func (w WaitStatus) Stopped() bool { return w&mask == stopped && syscall.Signal(w>>shift) != SIGSTOP } |
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func (w WaitStatus) Continued() bool { return w&mask == stopped && syscall.Signal(w>>shift) == SIGSTOP } |
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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 { return -1 } |
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//sys wait4(pid int32, statusp *_C_int, options int, rusage *Rusage) (wpid int32, err error) |
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func Wait4(pid int, wstatus *WaitStatus, options int, rusage *Rusage) (int, error) { |
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var status _C_int |
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rpid, err := wait4(int32(pid), &status, options, rusage) |
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wpid := int(rpid) |
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if wpid == -1 { |
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return wpid, err |
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} |
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if wstatus != nil { |
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*wstatus = WaitStatus(status) |
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} |
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return wpid, nil |
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} |
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//sys gethostname(buf []byte) (n int, err error) |
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func Gethostname() (name string, err error) { |
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var buf [MaxHostNameLen]byte |
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n, err := gethostname(buf[:]) |
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if n != 0 { |
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return "", err |
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} |
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n = clen(buf[:]) |
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if n < 1 { |
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return "", EFAULT |
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} |
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return string(buf[:n]), nil |
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} |
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//sys utimes(path string, times *[2]Timeval) (err error) |
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func Utimes(path string, tv []Timeval) (err error) { |
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if tv == nil { |
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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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return utimes(path, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
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} |
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//sys utimensat(fd int, path string, times *[2]Timespec, flag 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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return utimensat(AT_FDCWD, path, nil, 0) |
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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(AT_FDCWD, path, (*[2]Timespec)(unsafe.Pointer(&ts[0])), 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 fcntl(fd int, cmd int, arg int) (val int, err error) |
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// FcntlFlock performs a fcntl syscall for the F_GETLK, F_SETLK or F_SETLKW command. |
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func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error { |
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_, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procfcntl)), 3, uintptr(fd), uintptr(cmd), uintptr(unsafe.Pointer(lk)), 0, 0, 0) |
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if e1 != 0 { |
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return e1 |
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} |
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return nil |
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} |
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//sys futimesat(fildes 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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// Solaris doesn't have an futimes function because it allows NULL to be |
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// specified as the path for futimesat. However, Go doesn't like |
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// NULL-style string interfaces, so this simple wrapper is provided. |
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func Futimes(fd int, tv []Timeval) error { |
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if tv == nil { |
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return futimesat(fd, nil, 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(fd, nil, (*[2]Timeval)(unsafe.Pointer(&tv[0]))) |
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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_UNIX: |
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pp := (*RawSockaddrUnix)(unsafe.Pointer(rsa)) |
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sa := new(SockaddrUnix) |
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// Assume path ends at NUL. |
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// This is not technically the Solaris 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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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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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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//sys accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) = libsocket.accept |
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|
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func Accept(fd int) (nfd int, sa Sockaddr, err error) { |
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var rsa RawSockaddrAny |
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var len _Socklen = SizeofSockaddrAny |
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nfd, err = accept(fd, &rsa, &len) |
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if nfd == -1 { |
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return |
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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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nfd = 0 |
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} |
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return |
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} |
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//sys recvmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.recvmsg |
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|
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func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { |
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var msg Msghdr |
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var rsa RawSockaddrAny |
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msg.Name = (*byte)(unsafe.Pointer(&rsa)) |
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msg.Namelen = uint32(SizeofSockaddrAny) |
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var iov Iovec |
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if len(p) > 0 { |
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iov.Base = (*int8)(unsafe.Pointer(&p[0])) |
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iov.SetLen(len(p)) |
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} |
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var dummy int8 |
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if len(oob) > 0 { |
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// receive at least one normal byte |
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if len(p) == 0 { |
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iov.Base = &dummy |
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iov.SetLen(1) |
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} |
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msg.Accrights = (*int8)(unsafe.Pointer(&oob[0])) |
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} |
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msg.Iov = &iov |
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msg.Iovlen = 1 |
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if n, err = recvmsg(fd, &msg, flags); n == -1 { |
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return |
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} |
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oobn = int(msg.Accrightslen) |
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// source address is only specified if the socket is unconnected |
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if rsa.Addr.Family != AF_UNSPEC { |
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from, err = anyToSockaddr(&rsa) |
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} |
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return |
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} |
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|
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func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { |
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_, err = SendmsgN(fd, p, oob, to, flags) |
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return |
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} |
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|
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//sys sendmsg(s int, msg *Msghdr, flags int) (n int, err error) = libsocket.sendmsg |
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|
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func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { |
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var ptr unsafe.Pointer |
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var salen _Socklen |
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if to != nil { |
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ptr, salen, err = to.sockaddr() |
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if err != nil { |
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return 0, err |
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} |
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} |
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var msg Msghdr |
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msg.Name = (*byte)(unsafe.Pointer(ptr)) |
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msg.Namelen = uint32(salen) |
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var iov Iovec |
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if len(p) > 0 { |
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iov.Base = (*int8)(unsafe.Pointer(&p[0])) |
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iov.SetLen(len(p)) |
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} |
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var dummy int8 |
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if len(oob) > 0 { |
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// send at least one normal byte |
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if len(p) == 0 { |
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iov.Base = &dummy |
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iov.SetLen(1) |
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} |
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msg.Accrights = (*int8)(unsafe.Pointer(&oob[0])) |
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} |
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msg.Iov = &iov |
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msg.Iovlen = 1 |
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if n, err = sendmsg(fd, &msg, flags); err != nil { |
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return 0, err |
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} |
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if len(oob) > 0 && len(p) == 0 { |
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n = 0 |
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} |
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return n, nil |
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} |
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|
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//sys acct(path *byte) (err error) |
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|
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func Acct(path string) (err error) { |
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if len(path) == 0 { |
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// Assume caller wants to disable accounting. |
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return acct(nil) |
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} |
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|
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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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return acct(pathp) |
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} |
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|
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/* |
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* Expose the ioctl function |
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*/ |
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|
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//sys ioctl(fd int, req int, arg uintptr) (err error) |
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|
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func IoctlSetInt(fd int, req int, value int) (err error) { |
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return ioctl(fd, req, uintptr(value)) |
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} |
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|
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func IoctlSetWinsize(fd int, req int, value *Winsize) (err error) { |
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return ioctl(fd, req, uintptr(unsafe.Pointer(value))) |
|
} |
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|
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func IoctlSetTermios(fd int, req int, value *Termios) (err error) { |
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return ioctl(fd, req, uintptr(unsafe.Pointer(value))) |
|
} |
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|
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func IoctlSetTermio(fd int, req int, value *Termio) (err error) { |
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return ioctl(fd, req, uintptr(unsafe.Pointer(value))) |
|
} |
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|
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func IoctlGetInt(fd int, req int) (int, error) { |
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var value int |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) |
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return value, err |
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} |
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|
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func IoctlGetWinsize(fd int, req int) (*Winsize, error) { |
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var value Winsize |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) |
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return &value, err |
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} |
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|
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func IoctlGetTermios(fd int, req int) (*Termios, error) { |
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var value Termios |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) |
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return &value, err |
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} |
|
|
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func IoctlGetTermio(fd int, req int) (*Termio, error) { |
|
var value Termio |
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err := ioctl(fd, req, uintptr(unsafe.Pointer(&value))) |
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return &value, err |
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} |
|
|
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/* |
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* Exposed directly |
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*/ |
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//sys Access(path string, mode uint32) (err error) |
|
//sys Adjtime(delta *Timeval, olddelta *Timeval) (err error) |
|
//sys Chdir(path string) (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 Creat(path string, mode uint32) (fd int, err error) |
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//sys Dup(fd int) (nfd int, err error) |
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//sys Dup2(oldfd int, newfd int) (err error) |
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//sys Exit(code int) |
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//sys Fchdir(fd int) (err error) |
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//sys 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 Fdatasync(fd 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) |
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//sys Getdents(fd int, buf []byte, basep *uintptr) (n int, err error) |
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//sysnb Getgid() (gid int) |
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//sysnb Getpid() (pid int) |
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//sysnb Getpgid(pid int) (pgid int, err error) |
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//sysnb Getpgrp() (pgid int, err error) |
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//sys Geteuid() (euid int) |
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//sys Getegid() (egid int) |
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//sys Getppid() (ppid int) |
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//sys Getpriority(which int, who int) (n 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 Gettimeofday(tv *Timeval) (err error) |
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//sysnb Getuid() (uid int) |
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//sys Kill(pid int, signum syscall.Signal) (err error) |
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//sys Lchown(path string, uid int, gid int) (err error) |
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//sys Link(path string, link string) (err error) |
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//sys Listen(s int, backlog int) (err error) = libsocket.listen |
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//sys Lstat(path string, stat *Stat_t) (err error) |
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//sys Madvise(b []byte, advice int) (err error) |
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//sys Mkdir(path string, mode uint32) (err error) |
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//sys Mkdirat(dirfd int, path string, mode uint32) (err error) |
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//sys Mkfifo(path string, mode uint32) (err error) |
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//sys Mkfifoat(dirfd int, 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 Mknodat(dirfd int, 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 Nanosleep(time *Timespec, leftover *Timespec) (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, flags int, mode uint32) (fd int, err error) |
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//sys Pathconf(path string, name int) (val int, err error) |
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//sys Pause() (err error) |
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//sys Pread(fd int, p []byte, offset int64) (n int, err error) |
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//sys Pwrite(fd int, p []byte, offset int64) (n int, err error) |
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//sys read(fd int, p []byte) (n int, err error) |
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//sys Readlink(path string, buf []byte) (n int, err error) |
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//sys Rename(from string, to string) (err error) |
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//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath 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) = lseek |
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//sysnb 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 Sethostname(p []byte) (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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//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 Setuid(uid int) (err error) |
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//sys Shutdown(s int, how int) (err error) = libsocket.shutdown |
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//sys Stat(path string, stat *Stat_t) (err error) |
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//sys Symlink(path string, link string) (err error) |
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//sys Sync() (err error) |
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//sysnb Times(tms *Tms) (ticks uintptr, err error) |
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//sys Truncate(path string, length int64) (err error) |
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//sys Fsync(fd int) (err error) |
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//sys Ftruncate(fd int, length int64) (err error) |
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//sys Umask(mask int) (oldmask int) |
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//sysnb Uname(buf *Utsname) (err error) |
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//sys Unmount(target string, flags int) (err error) = libc.umount |
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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 Ustat(dev int, ubuf *Ustat_t) (err error) |
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//sys Utime(path string, buf *Utimbuf) (err error) |
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//sys bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.bind |
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//sys connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.connect |
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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 sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) = libsocket.sendto |
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//sys socket(domain int, typ int, proto int) (fd int, err error) = libsocket.socket |
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//sysnb socketpair(domain int, typ int, proto int, fd *[2]int32) (err error) = libsocket.socketpair |
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//sys write(fd int, p []byte) (n int, err error) |
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//sys getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error) = libsocket.getsockopt |
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//sysnb getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) = libsocket.getpeername |
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//sys setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) (err error) = libsocket.setsockopt |
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//sys recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) = libsocket.recvfrom |
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func readlen(fd int, buf *byte, nbuf int) (n int, err error) { |
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r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procread)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0) |
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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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func writelen(fd int, buf *byte, nbuf int) (n int, err error) { |
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r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&procwrite)), 3, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf), 0, 0, 0) |
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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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var mapper = &mmapper{ |
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active: make(map[*byte][]byte), |
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mmap: mmap, |
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munmap: munmap, |
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} |
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|
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func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { |
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return mapper.Mmap(fd, offset, length, prot, flags) |
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} |
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func Munmap(b []byte) (err error) { |
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return mapper.Munmap(b) |
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} |
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//sys sysconf(name int) (n int64, err error) |
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|
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// pageSize caches the value of Getpagesize, since it can't change |
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// once the system is booted. |
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var pageSize int64 // accessed atomically |
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|
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func Getpagesize() int { |
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n := atomic.LoadInt64(&pageSize) |
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if n == 0 { |
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n, _ = sysconf(_SC_PAGESIZE) |
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atomic.StoreInt64(&pageSize, n) |
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} |
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return int(n) |
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}
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