syscall: Reimplement linux syscalls in terms of their *at replacements.
Updates #9974
This proposal tackles the body of syscalls which have been replaced,
and are now deprecated in linux. This is needed for the arm64 port as
arm64 is the first linux architecture to remove the "legacy" forms of
these syscalls.
The *AT variants were added in kernel 2.6.16, so well before our 2.6.23
cutoff (hey, it'll even work on RHEL5).
Discussion: https://groups.google.com/forum/#!topic/golang-dev/zpeFtN2z5Fc
Change-Id: I473a7c9a295d6f776fcdc75dcce06cbe9e3564ee
Reviewed-on: https://go-review.googlesource.com/5837
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/src/syscall/zsyscall_linux_amd64.go b/src/syscall/zsyscall_linux_amd64.go
index 6b00fed..c163c96 100644
--- a/src/syscall/zsyscall_linux_amd64.go
+++ b/src/syscall/zsyscall_linux_amd64.go
@@ -7,15 +7,20 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func open(path string, mode int, perm uint32) (fd int, err error) {
+func linkat(olddirfd int, oldpath string, newdirfd int, newpath string, flags int) (err error) {
var _p0 *byte
- _p0, err = BytePtrFromString(path)
+ _p0, err = BytePtrFromString(oldpath)
if err != nil {
return
}
- r0, _, e1 := Syscall(SYS_OPEN, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(perm))
+ var _p1 *byte
+ _p1, err = BytePtrFromString(newpath)
+ if err != nil {
+ return
+ }
+ _, _, e1 := Syscall6(SYS_LINKAT, uintptr(olddirfd), uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)), uintptr(flags), 0)
use(unsafe.Pointer(_p0))
- fd = int(r0)
+ use(unsafe.Pointer(_p1))
if e1 != 0 {
err = e1
}
@@ -41,6 +46,67 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+func readlinkat(dirfd int, path string, buf []byte) (n int, err error) {
+ var _p0 *byte
+ _p0, err = BytePtrFromString(path)
+ if err != nil {
+ return
+ }
+ var _p1 unsafe.Pointer
+ if len(buf) > 0 {
+ _p1 = unsafe.Pointer(&buf[0])
+ } else {
+ _p1 = unsafe.Pointer(&_zero)
+ }
+ r0, _, e1 := Syscall6(SYS_READLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)), 0, 0)
+ use(unsafe.Pointer(_p0))
+ n = int(r0)
+ if e1 != 0 {
+ err = e1
+ }
+ return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func symlinkat(oldpath string, newdirfd int, newpath string) (err error) {
+ var _p0 *byte
+ _p0, err = BytePtrFromString(oldpath)
+ if err != nil {
+ return
+ }
+ var _p1 *byte
+ _p1, err = BytePtrFromString(newpath)
+ if err != nil {
+ return
+ }
+ _, _, e1 := Syscall(SYS_SYMLINKAT, uintptr(unsafe.Pointer(_p0)), uintptr(newdirfd), uintptr(unsafe.Pointer(_p1)))
+ use(unsafe.Pointer(_p0))
+ use(unsafe.Pointer(_p1))
+ if e1 != 0 {
+ err = e1
+ }
+ return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func unlinkat(dirfd int, path string, flags int) (err error) {
+ var _p0 *byte
+ _p0, err = BytePtrFromString(path)
+ if err != nil {
+ return
+ }
+ _, _, e1 := Syscall(SYS_UNLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), uintptr(flags))
+ use(unsafe.Pointer(_p0))
+ if e1 != 0 {
+ err = e1
+ }
+ return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
func utimes(path string, times *[2]Timeval) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -165,22 +231,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Access(path string, mode uint32) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_ACCESS, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Acct(path string) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -224,22 +274,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Chmod(path string, mode uint32) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_CHMOD, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Chroot(path string) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -266,23 +300,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Creat(path string, mode uint32) (fd int, err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- r0, _, e1 := Syscall(SYS_CREAT, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
- use(unsafe.Pointer(_p0))
- fd = int(r0)
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Dup(oldfd int) (fd int, err error) {
r0, _, e1 := RawSyscall(SYS_DUP, uintptr(oldfd), 0, 0)
fd = int(r0)
@@ -666,28 +683,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Link(oldpath string, newpath string) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(oldpath)
- if err != nil {
- return
- }
- var _p1 *byte
- _p1, err = BytePtrFromString(newpath)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_LINK, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
- use(unsafe.Pointer(_p0))
- use(unsafe.Pointer(_p1))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Listxattr(path string, dest []byte) (sz int, err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -711,22 +706,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Mkdir(path string, mode uint32) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_MKDIR, uintptr(unsafe.Pointer(_p0)), uintptr(mode), 0)
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Mkdirat(dirfd int, path string, mode uint32) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -743,22 +722,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Mknod(path string, mode uint32, dev int) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_MKNOD, uintptr(unsafe.Pointer(_p0)), uintptr(mode), uintptr(dev))
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -844,29 +807,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Readlink(path string, buf []byte) (n int, err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- var _p1 unsafe.Pointer
- if len(buf) > 0 {
- _p1 = unsafe.Pointer(&buf[0])
- } else {
- _p1 = unsafe.Pointer(&_zero)
- }
- r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(buf)))
- use(unsafe.Pointer(_p0))
- n = int(r0)
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Removexattr(path string, attr string) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(path)
@@ -889,28 +829,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Rename(oldpath string, newpath string) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(oldpath)
- if err != nil {
- return
- }
- var _p1 *byte
- _p1, err = BytePtrFromString(newpath)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_RENAME, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
- use(unsafe.Pointer(_p0))
- use(unsafe.Pointer(_p1))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(oldpath)
@@ -933,22 +851,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Rmdir(path string) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_RMDIR, uintptr(unsafe.Pointer(_p0)), 0, 0)
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Setdomainname(p []byte) (err error) {
var _p0 unsafe.Pointer
if len(p) > 0 {
@@ -1050,28 +952,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Symlink(oldpath string, newpath string) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(oldpath)
- if err != nil {
- return
- }
- var _p1 *byte
- _p1, err = BytePtrFromString(newpath)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_SYMLINK, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
- use(unsafe.Pointer(_p0))
- use(unsafe.Pointer(_p1))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Sync() {
Syscall(SYS_SYNC, 0, 0, 0)
return
@@ -1139,38 +1019,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Unlink(path string) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_UNLINK, uintptr(unsafe.Pointer(_p0)), 0, 0)
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
-func Unlinkat(dirfd int, path string) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_UNLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(_p0)), 0)
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Unmount(target string, flags int) (err error) {
var _p0 *byte
_p0, err = BytePtrFromString(target)
@@ -1366,22 +1214,6 @@
// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-func Chown(path string, uid int, gid int) (err error) {
- var _p0 *byte
- _p0, err = BytePtrFromString(path)
- if err != nil {
- return
- }
- _, _, e1 := Syscall(SYS_CHOWN, uintptr(unsafe.Pointer(_p0)), uintptr(uid), uintptr(gid))
- use(unsafe.Pointer(_p0))
- if e1 != 0 {
- err = e1
- }
- return
-}
-
-// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
-
func Dup2(oldfd int, newfd int) (err error) {
_, _, e1 := RawSyscall(SYS_DUP2, uintptr(oldfd), uintptr(newfd), 0)
if e1 != 0 {
