mirror of
https://github.com/rwinkhart/sys.git
synced 2026-09-01 14:47:28 -04:00
unix: split Pipe/Pipe2/Dup2, use *at replacement calls
This brings over three CLs from the main syscall package: http://golang.org/cl/5833 http://golang.org/cl/5835 http://golang.org/cl/5837 Pipe, Pipe2, and Dup2 are moved from syscall_linux.go to the GOARCH specific variants. On 386 and amd64, Linux kernel version 2.6.23 (the documented minimum Linux kernel version the Go distribution supports) does not support the pipe2 system call, so Pipe continues to call pipe. On ARM, Pipe now calls pipe2. Several system calls are reimplemented in terms of the *at syscalls, passing AT_FDCWD to indicate that pathnames are to be interpreted relative to the current directory. The *at syscalls were added in Linux kernel version 2.6.16. This is in preparation for arm64 support, as the arm64 Linux kernel does not provide the traditional syscall variants. Change-Id: Id6bc6097dc5f4324cd9e429c5e1f3a411a08ce42 Reviewed-on: https://go-review.googlesource.com/10032 Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Ian Lance Taylor
+66
-244
@@ -12,15 +12,20 @@ var _ syscall.Errno
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func open(path string, mode int, perm uint32) (fd int, err error) {
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func linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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_p0, err = BytePtrFromString(oldpath)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_OPEN, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
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var _p1 *byte
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_p1, err = BytePtrFromString(newpath)
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if err != nil {
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return
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}
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_, _, e1 := Syscall6(SYS_LINKAT, uintptr(olddirfd), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
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use(unsafe.Pointer(_p0))
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fd = int(r0)
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use(unsafe.Pointer(_p1))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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@@ -46,8 +51,21 @@ func openat(dirfd int, path string, flags int, mode uint32) (fd int, err error)
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func pipe(p *[2]_C_int) (err error) {
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_, _, e1 := RawSyscall(SYS_PIPE, uintptr(unsafe.Pointer(p)), 0, 0)
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func readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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var _p1 unsafe.Pointer
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if len(buf) > 0 {
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_p1 = unsafe.Pointer(&buf[0])
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} else {
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_p1 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall6(SYS_READLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
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use(unsafe.Pointer(_p0))
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n = int(r0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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@@ -56,8 +74,36 @@ func pipe(p *[2]_C_int) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func pipe2(p *[2]_C_int, flags int) (err error) {
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_, _, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
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func symlinkat(oldpath string, newdirfd int, newpath string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(oldpath)
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if err != nil {
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return
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}
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var _p1 *byte
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_p1, err = BytePtrFromString(newpath)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_SYMLINKAT, uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
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use(unsafe.Pointer(_p0))
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use(unsafe.Pointer(_p1))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func unlinkat(dirfd int, path string, flags int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_UNLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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@@ -190,22 +236,6 @@ func mount(source string, target string, fstype string, flags uintptr, data *byt
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Access(path string, mode uint32) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_ACCESS, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Acct(path string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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@@ -249,22 +279,6 @@ func Chdir(path string) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Chmod(path string, mode uint32) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_CHMOD, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Chroot(path string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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@@ -301,23 +315,6 @@ func Close(fd int) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Creat(path string, mode uint32) (fd int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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r0, _, e1 := Syscall(SYS_CREAT, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
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use(unsafe.Pointer(_p0))
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fd = int(r0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Dup(oldfd int) (fd int, err error) {
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r0, _, e1 := Syscall(SYS_DUP, uintptr(oldfd), 0, 0)
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fd = int(r0)
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@@ -329,16 +326,6 @@ func Dup(oldfd int) (fd int, err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Dup2(oldfd int, newfd int) (err error) {
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_, _, e1 := Syscall(SYS_DUP2, uintptr(oldfd), uintptr(newfd), 0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Dup3(oldfd int, newfd int, flags int) (err error) {
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_, _, e1 := Syscall(SYS_DUP3, uintptr(oldfd), uintptr(newfd), uintptr(flags))
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if e1 != 0 {
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@@ -703,28 +690,6 @@ func Klogctl(typ int, buf []byte) (n int, err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Link(oldpath string, newpath string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(oldpath)
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if err != nil {
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return
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}
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var _p1 *byte
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_p1, err = BytePtrFromString(newpath)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_LINK, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
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use(unsafe.Pointer(_p0))
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use(unsafe.Pointer(_p1))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Listxattr(path string, dest []byte) (sz int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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@@ -748,22 +713,6 @@ func Listxattr(path string, dest []byte) (sz int, err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Mkdir(path string, mode uint32) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_MKDIR, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Mkdirat(dirfd int, path string, mode uint32) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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@@ -780,22 +729,6 @@ func Mkdirat(dirfd int, path string, mode uint32) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Mknod(path string, mode uint32, dev int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_MKNOD, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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@@ -881,29 +814,6 @@ func read(fd int, p []byte) (n int, err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Readlink(path string, buf []byte) (n int, err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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var _p1 unsafe.Pointer
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if len(buf) > 0 {
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_p1 = unsafe.Pointer(&buf[0])
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} else {
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_p1 = unsafe.Pointer(&_zero)
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}
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r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
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use(unsafe.Pointer(_p0))
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n = int(r0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Removexattr(path string, attr string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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@@ -926,28 +836,6 @@ func Removexattr(path string, attr string) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Rename(oldpath string, newpath string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(oldpath)
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if err != nil {
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return
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}
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var _p1 *byte
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_p1, err = BytePtrFromString(newpath)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_RENAME, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
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use(unsafe.Pointer(_p0))
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use(unsafe.Pointer(_p1))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(oldpath)
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@@ -970,22 +858,6 @@ func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err e
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Rmdir(path string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_RMDIR, uintptr(unsafe.Pointer(_p0)), 0, 0)
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Setdomainname(p []byte) (err error) {
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var _p0 unsafe.Pointer
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if len(p) > 0 {
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@@ -1087,28 +959,6 @@ func Setxattr(path string, attr string, data []byte, flags int) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Symlink(oldpath string, newpath string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(oldpath)
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if err != nil {
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return
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}
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var _p1 *byte
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_p1, err = BytePtrFromString(newpath)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_SYMLINK, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
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use(unsafe.Pointer(_p0))
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use(unsafe.Pointer(_p1))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Sync() {
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Syscall(SYS_SYNC, 0, 0, 0)
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return
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@@ -1176,38 +1026,6 @@ func Uname(buf *Utsname) (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Unlink(path string) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_UNLINK, uintptr(unsafe.Pointer(_p0)), 0, 0)
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Unlinkat(dirfd int, path string, flags int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_UNLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
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use(unsafe.Pointer(_p0))
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Unmount(target string, flags int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(target)
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@@ -1403,6 +1221,16 @@ func Munlockall() (err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func pipe2(p *[2]_C_int, flags int) (err error) {
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_, _, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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return
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}
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
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r0, _, e1 := Syscall(SYS_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
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fd = int(r0)
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@@ -1582,14 +1410,8 @@ func sendmsg(s int, msg *Msghdr, flags int) (n int, err error) {
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// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
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func Chown(path string, uid int, gid int) (err error) {
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var _p0 *byte
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_p0, err = BytePtrFromString(path)
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if err != nil {
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return
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}
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_, _, e1 := Syscall(SYS_CHOWN32, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
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use(unsafe.Pointer(_p0))
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func Dup2(oldfd int, newfd int) (err error) {
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_, _, e1 := Syscall(SYS_DUP2, uintptr(oldfd), uintptr(newfd), 0)
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if e1 != 0 {
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err = errnoErr(e1)
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}
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