syscall: add {Get,Set,List,Remove}xattr on Linux.

R=golang-dev, minux.ma, fullung, dave, rsc, hanwenn
CC=golang-dev
https://golang.org/cl/6350074

src/pkg/syscall/syscall_linux.go

@@ -849,6 +849,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
 //sysnb	Getppid() (ppid int)
 //sysnb	Getrusage(who int, rusage *Rusage) (err error)
 //sysnb	Gettid() (tid int)
+//sys	Getxattr(path string, attr string, dest []byte) (sz int, err error)
 //sys	InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error)
 //sysnb	InotifyInit() (fd int, err error)
 //sysnb	InotifyInit1(flags int) (fd int, err error)
@@ -856,6 +857,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
 //sysnb	Kill(pid int, sig Signal) (err error)
 //sys	Klogctl(typ int, buf []byte) (n int, err error) = SYS_SYSLOG
 //sys	Link(oldpath string, newpath string) (err error)
+//sys	Listxattr(path string, dest []byte) (sz int, err error)
 //sys	Mkdir(path string, mode uint32) (err error)
 //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
 //sys	Mknod(path string, mode uint32, dev int) (err error)
@@ -866,6 +868,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
 //sysnb prlimit(pid int, resource int, old *Rlimit, newlimit *Rlimit) (err error) = SYS_PRLIMIT64
 //sys	read(fd int, p []byte) (n int, err error)
 //sys	Readlink(path string, buf []byte) (n int, err error)
+//sys	Removexattr(path string, attr string) (err error)
 //sys	Rename(oldpath string, newpath string) (err error)
 //sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
 //sys	Rmdir(path string) (err error)
@@ -875,6 +878,7 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
 //sysnb	Setsid() (pid int, err error)
 //sysnb	Settimeofday(tv *Timeval) (err error)
 //sysnb	Setuid(uid int) (err error)
+//sys	Setxattr(path string, attr string, data []byte, flags int) (err error)
 //sys	Symlink(oldpath string, newpath string) (err error)
 //sys	Sync()
 //sysnb	Sysinfo(info *Sysinfo_t) (err error)
@@ -954,7 +958,6 @@ func Munmap(b []byte) (err error) {
 // Getitimer
 // Getpmsg
 // Getpriority
-// Getxattr
 // IoCancel
 // IoDestroy
 // IoGetevents
@@ -966,7 +969,6 @@ func Munmap(b []byte) (err error) {
 // KexecLoad
 // Keyctl
 // Lgetxattr
-// Listxattr
 // Llistxattr
 // LookupDcookie
 // Lremovexattr
@@ -1004,7 +1006,6 @@ func Munmap(b []byte) (err error) {
 // Readahead
 // Readv
 // RemapFilePages
-// Removexattr
 // RequestKey
 // RestartSyscall
 // RtSigaction
@@ -1033,7 +1034,6 @@ func Munmap(b []byte) (err error) {
 // SetThreadArea
 // SetTidAddress
 // Setpriority
-// Setxattr
 // Shmat
 // Shmctl
 // Shmdt
@@ -1059,5 +1059,4 @@ func Munmap(b []byte) (err error) {
 // Vmsplice
 // Vserver
 // Waitid
-// Writev
 // _Sysctl

src/pkg/syscall/zsyscall_linux_386.go

@@ -527,6 +527,33 @@ func Gettid() (tid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	var _p2 unsafe.Pointer
+	if len(dest) > 0 {
+		_p2 = unsafe.Pointer(&dest[0])
+	} else {
+		_p2 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), 0, 0)
+	sz = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(pathname)
@@ -623,6 +650,28 @@ func Link(oldpath string, newpath string) (err error) {
 
 // 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)
+	if err != nil {
+		return
+	}
+	var _p1 unsafe.Pointer
+	if len(dest) > 0 {
+		_p1 = unsafe.Pointer(&dest[0])
+	} else {
+		_p1 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_LISTXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(dest)))
+	sz = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)
@@ -772,6 +821,26 @@ func Readlink(path string, buf []byte) (n int, err error) {
 
 // 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)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	_, _, e1 := Syscall(SYS_REMOVEXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)
@@ -900,6 +969,32 @@ func Setuid(uid int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Setxattr(path string, attr string, data []byte, flags int) (err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	var _p2 unsafe.Pointer
+	if len(data) > 0 {
+		_p2 = unsafe.Pointer(&data[0])
+	} else {
+		_p2 = unsafe.Pointer(&_zero)
+	}
+	_, _, e1 := Syscall6(SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(data)), uintptr(flags), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)

src/pkg/syscall/zsyscall_linux_amd64.go

@@ -527,6 +527,33 @@ func Gettid() (tid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	var _p2 unsafe.Pointer
+	if len(dest) > 0 {
+		_p2 = unsafe.Pointer(&dest[0])
+	} else {
+		_p2 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), 0, 0)
+	sz = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(pathname)
@@ -623,6 +650,28 @@ func Link(oldpath string, newpath string) (err error) {
 
 // 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)
+	if err != nil {
+		return
+	}
+	var _p1 unsafe.Pointer
+	if len(dest) > 0 {
+		_p1 = unsafe.Pointer(&dest[0])
+	} else {
+		_p1 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_LISTXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(dest)))
+	sz = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)
@@ -772,6 +821,26 @@ func Readlink(path string, buf []byte) (n int, err error) {
 
 // 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)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	_, _, e1 := Syscall(SYS_REMOVEXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)
@@ -900,6 +969,32 @@ func Setuid(uid int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Setxattr(path string, attr string, data []byte, flags int) (err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	var _p2 unsafe.Pointer
+	if len(data) > 0 {
+		_p2 = unsafe.Pointer(&data[0])
+	} else {
+		_p2 = unsafe.Pointer(&_zero)
+	}
+	_, _, e1 := Syscall6(SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(data)), uintptr(flags), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)

src/pkg/syscall/zsyscall_linux_arm.go

@@ -527,6 +527,33 @@ func Gettid() (tid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Getxattr(path string, attr string, dest []byte) (sz int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	var _p2 unsafe.Pointer
+	if len(dest) > 0 {
+		_p2 = unsafe.Pointer(&dest[0])
+	} else {
+		_p2 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall6(SYS_GETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(dest)), 0, 0)
+	sz = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(pathname)
@@ -623,6 +650,28 @@ func Link(oldpath string, newpath string) (err error) {
 
 // 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)
+	if err != nil {
+		return
+	}
+	var _p1 unsafe.Pointer
+	if len(dest) > 0 {
+		_p1 = unsafe.Pointer(&dest[0])
+	} else {
+		_p1 = unsafe.Pointer(&_zero)
+	}
+	r0, _, e1 := Syscall(SYS_LISTXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(_p1), uintptr(len(dest)))
+	sz = int(r0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)
@@ -772,6 +821,26 @@ func Readlink(path string, buf []byte) (n int, err error) {
 
 // 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)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	_, _, e1 := Syscall(SYS_REMOVEXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)
@@ -900,6 +969,32 @@ func Setuid(uid int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func Setxattr(path string, attr string, data []byte, flags int) (err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(path)
+	if err != nil {
+		return
+	}
+	var _p1 *byte
+	_p1, err = BytePtrFromString(attr)
+	if err != nil {
+		return
+	}
+	var _p2 unsafe.Pointer
+	if len(data) > 0 {
+		_p2 = unsafe.Pointer(&data[0])
+	} else {
+		_p2 = unsafe.Pointer(&_zero)
+	}
+	_, _, e1 := Syscall6(SYS_SETXATTR, uintptr(unsafe.Pointer(_p0)), uintptr(unsafe.Pointer(_p1)), uintptr(_p2), uintptr(len(data)), uintptr(flags), 0)
+	if e1 != 0 {
+		err = e1
+	}
+	return
+}
+
+// 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)