syscall: fix linux arm build

Regenerate system call file.

TBR=bradfitz
CC=golang-dev
https://golang.org/cl/5371087

src/pkg/syscall/zsyscall_linux_arm.go

@@ -7,49 +7,59 @@ import "unsafe"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func open(path string, mode int, perm uint32) (fd int, errno int) {
+func open(path string, mode int, perm uint32) (fd int, err error) {
 	r0, _, e1 := Syscall(SYS_OPEN, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), uintptr(perm))
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func openat(dirfd int, path string, flags int, mode uint32) (fd int, errno int) {
+func openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) {
 	r0, _, e1 := Syscall6(SYS_OPENAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(flags), uintptr(mode), 0, 0)
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func pipe(p *[2]_C_int) (errno int) {
+func pipe(p *[2]_C_int) (err error) {
 	_, _, e1 := RawSyscall(SYS_PIPE, uintptr(unsafe.Pointer(p)), 0, 0)
-	errno = int(e1)
+	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) (errno int) {
+func utimes(path string, times *[2]Timeval) (err error) {
 	_, _, e1 := Syscall(SYS_UTIMES, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(times)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func futimesat(dirfd int, path *byte, times *[2]Timeval) (errno int) {
+func futimesat(dirfd int, path *byte, times *[2]Timeval) (err error) {
 	_, _, e1 := Syscall(SYS_FUTIMESAT, uintptr(dirfd), uintptr(unsafe.Pointer(path)), uintptr(unsafe.Pointer(times)))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getcwd(buf []byte) (n int, errno int) {
+func Getcwd(buf []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -58,147 +68,181 @@ func Getcwd(buf []byte) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_GETCWD, uintptr(_p0), uintptr(len(buf)), 0)
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, errno int) {
+func wait4(pid int, wstatus *_C_int, options int, rusage *Rusage) (wpid int, err error) {
 	r0, _, e1 := Syscall6(SYS_WAIT4, uintptr(pid), uintptr(unsafe.Pointer(wstatus)), uintptr(options), uintptr(unsafe.Pointer(rusage)), 0, 0)
 	wpid = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func ptrace(request int, pid int, addr uintptr, data uintptr) (errno int) {
+func ptrace(request int, pid int, addr uintptr, data uintptr) (err error) {
 	_, _, e1 := Syscall6(SYS_PTRACE, uintptr(request), uintptr(pid), uintptr(addr), uintptr(data), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func reboot(magic1 uint, magic2 uint, cmd int, arg string) (errno int) {
+func reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error) {
 	_, _, e1 := Syscall6(SYS_REBOOT, uintptr(magic1), uintptr(magic2), uintptr(cmd), uintptr(unsafe.Pointer(StringBytePtr(arg))), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func mount(source string, target string, fstype string, flags uintptr, data *byte) (errno int) {
+func mount(source string, target string, fstype string, flags uintptr, data *byte) (err error) {
 	_, _, e1 := Syscall6(SYS_MOUNT, uintptr(unsafe.Pointer(StringBytePtr(source))), uintptr(unsafe.Pointer(StringBytePtr(target))), uintptr(unsafe.Pointer(StringBytePtr(fstype))), uintptr(flags), uintptr(unsafe.Pointer(data)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Access(path string, mode uint32) (errno int) {
+func Access(path string, mode uint32) (err error) {
 	_, _, e1 := Syscall(SYS_ACCESS, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Acct(path string) (errno int) {
+func Acct(path string) (err error) {
 	_, _, e1 := Syscall(SYS_ACCT, uintptr(unsafe.Pointer(StringBytePtr(path))), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Adjtimex(buf *Timex) (state int, errno int) {
+func Adjtimex(buf *Timex) (state int, err error) {
 	r0, _, e1 := Syscall(SYS_ADJTIMEX, uintptr(unsafe.Pointer(buf)), 0, 0)
 	state = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Chdir(path string) (errno int) {
+func Chdir(path string) (err error) {
 	_, _, e1 := Syscall(SYS_CHDIR, uintptr(unsafe.Pointer(StringBytePtr(path))), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Chmod(path string, mode uint32) (errno int) {
+func Chmod(path string, mode uint32) (err error) {
 	_, _, e1 := Syscall(SYS_CHMOD, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Chroot(path string) (errno int) {
+func Chroot(path string) (err error) {
 	_, _, e1 := Syscall(SYS_CHROOT, uintptr(unsafe.Pointer(StringBytePtr(path))), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Close(fd int) (errno int) {
+func Close(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_CLOSE, uintptr(fd), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Creat(path string, mode uint32) (fd int, errno int) {
+func Creat(path string, mode uint32) (fd int, err error) {
 	r0, _, e1 := Syscall(SYS_CREAT, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), 0)
 	fd = int(r0)
-	errno = int(e1)
+	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, errno int) {
+func Dup(oldfd int) (fd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_DUP, uintptr(oldfd), 0, 0)
 	fd = int(r0)
-	errno = int(e1)
+	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) (fd int, errno int) {
+func Dup2(oldfd int, newfd int) (fd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_DUP2, uintptr(oldfd), uintptr(newfd), 0)
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func EpollCreate(size int) (fd int, errno int) {
+func EpollCreate(size int) (fd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_EPOLL_CREATE, uintptr(size), 0, 0)
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (errno int) {
+func EpollCtl(epfd int, op int, fd int, event *EpollEvent) (err error) {
 	_, _, e1 := RawSyscall6(SYS_EPOLL_CTL, uintptr(epfd), uintptr(op), uintptr(fd), uintptr(unsafe.Pointer(event)), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func EpollWait(epfd int, events []EpollEvent, msec int) (n int, errno int) {
+func EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(events) > 0 {
 		_p0 = unsafe.Pointer(&events[0])
@@ -207,7 +251,9 @@ func EpollWait(epfd int, events []EpollEvent, msec int) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall6(SYS_EPOLL_WAIT, uintptr(epfd), uintptr(_p0), uintptr(len(events)), uintptr(msec), 0, 0)
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -220,88 +266,108 @@ func Exit(code int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Faccessat(dirfd int, path string, mode uint32, flags int) (errno int) {
+func Faccessat(dirfd int, path string, mode uint32, flags int) (err error) {
 	_, _, e1 := Syscall6(SYS_FACCESSAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), uintptr(flags), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fallocate(fd int, mode uint32, off int64, len int64) (errno int) {
+func Fallocate(fd int, mode uint32, off int64, len int64) (err error) {
 	_, _, e1 := Syscall6(SYS_FALLOCATE, uintptr(fd), uintptr(mode), uintptr(off>>32), uintptr(off), uintptr(len>>32), uintptr(len))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fchdir(fd int) (errno int) {
+func Fchdir(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_FCHDIR, uintptr(fd), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fchmod(fd int, mode uint32) (errno int) {
+func Fchmod(fd int, mode uint32) (err error) {
 	_, _, e1 := Syscall(SYS_FCHMOD, uintptr(fd), uintptr(mode), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fchmodat(dirfd int, path string, mode uint32, flags int) (errno int) {
+func Fchmodat(dirfd int, path string, mode uint32, flags int) (err error) {
 	_, _, e1 := Syscall6(SYS_FCHMODAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), uintptr(flags), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fchownat(dirfd int, path string, uid int, gid int, flags int) (errno int) {
+func Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error) {
 	_, _, e1 := Syscall6(SYS_FCHOWNAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(uid), uintptr(gid), uintptr(flags), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func fcntl(fd int, cmd int, arg int) (val int, errno int) {
+func fcntl(fd int, cmd int, arg int) (val int, err error) {
 	r0, _, e1 := Syscall(SYS_FCNTL, uintptr(fd), uintptr(cmd), uintptr(arg))
 	val = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fdatasync(fd int) (errno int) {
+func Fdatasync(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_FDATASYNC, uintptr(fd), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Flock(fd int, how int) (errno int) {
+func Flock(fd int, how int) (err error) {
 	_, _, e1 := Syscall(SYS_FLOCK, uintptr(fd), uintptr(how), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fsync(fd int) (errno int) {
+func Fsync(fd int) (err error) {
 	_, _, e1 := Syscall(SYS_FSYNC, uintptr(fd), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getdents(fd int, buf []byte) (n int, errno int) {
+func Getdents(fd int, buf []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -310,16 +376,20 @@ func Getdents(fd int, buf []byte) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_GETDENTS64, uintptr(fd), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getpgid(pid int) (pgid int, errno int) {
+func Getpgid(pid int) (pgid int, err error) {
 	r0, _, e1 := RawSyscall(SYS_GETPGID, uintptr(pid), 0, 0)
 	pgid = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -349,17 +419,21 @@ func Getppid() (ppid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getrlimit(resource int, rlim *Rlimit) (errno int) {
+func Getrlimit(resource int, rlim *Rlimit) (err error) {
 	_, _, e1 := RawSyscall(SYS_GETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getrusage(who int, rusage *Rusage) (errno int) {
+func Getrusage(who int, rusage *Rusage) (err error) {
 	_, _, e1 := RawSyscall(SYS_GETRUSAGE, uintptr(who), uintptr(unsafe.Pointer(rusage)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -373,51 +447,61 @@ func Gettid() (tid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, errno int) {
+func InotifyAddWatch(fd int, pathname string, mask uint32) (watchdesc int, err error) {
 	r0, _, e1 := Syscall(SYS_INOTIFY_ADD_WATCH, uintptr(fd), uintptr(unsafe.Pointer(StringBytePtr(pathname))), uintptr(mask))
 	watchdesc = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func InotifyInit() (fd int, errno int) {
+func InotifyInit() (fd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_INOTIFY_INIT, 0, 0, 0)
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func InotifyInit1(flags int) (fd int, errno int) {
+func InotifyInit1(flags int) (fd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_INOTIFY_INIT1, uintptr(flags), 0, 0)
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func InotifyRmWatch(fd int, watchdesc uint32) (success int, errno int) {
+func InotifyRmWatch(fd int, watchdesc uint32) (success int, err error) {
 	r0, _, e1 := RawSyscall(SYS_INOTIFY_RM_WATCH, uintptr(fd), uintptr(watchdesc), 0)
 	success = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Kill(pid int, sig int) (errno int) {
+func Kill(pid int, sig int) (err error) {
 	_, _, e1 := RawSyscall(SYS_KILL, uintptr(pid), uintptr(sig), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Klogctl(typ int, buf []byte) (n int, errno int) {
+func Klogctl(typ int, buf []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -426,77 +510,95 @@ func Klogctl(typ int, buf []byte) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Link(oldpath string, newpath string) (errno int) {
+func Link(oldpath string, newpath string) (err error) {
 	_, _, e1 := Syscall(SYS_LINK, uintptr(unsafe.Pointer(StringBytePtr(oldpath))), uintptr(unsafe.Pointer(StringBytePtr(newpath))), 0)
-	errno = int(e1)
+	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) (errno int) {
+func Mkdir(path string, mode uint32) (err error) {
 	_, _, e1 := Syscall(SYS_MKDIR, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), 0)
-	errno = int(e1)
+	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) (errno int) {
+func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	_, _, e1 := Syscall(SYS_MKDIRAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Mknod(path string, mode uint32, dev int) (errno int) {
+func Mknod(path string, mode uint32, dev int) (err error) {
 	_, _, e1 := Syscall(SYS_MKNOD, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), uintptr(dev))
-	errno = int(e1)
+	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) (errno int) {
+func Mknodat(dirfd int, path string, mode uint32, dev int) (err error) {
 	_, _, e1 := Syscall6(SYS_MKNODAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(mode), uintptr(dev), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Nanosleep(time *Timespec, leftover *Timespec) (errno int) {
+func Nanosleep(time *Timespec, leftover *Timespec) (err error) {
 	_, _, e1 := Syscall(SYS_NANOSLEEP, uintptr(unsafe.Pointer(time)), uintptr(unsafe.Pointer(leftover)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Pause() (errno int) {
+func Pause() (err error) {
 	_, _, e1 := Syscall(SYS_PAUSE, 0, 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func PivotRoot(newroot string, putold string) (errno int) {
+func PivotRoot(newroot string, putold string) (err error) {
 	_, _, e1 := Syscall(SYS_PIVOT_ROOT, uintptr(unsafe.Pointer(StringBytePtr(newroot))), uintptr(unsafe.Pointer(StringBytePtr(putold))), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Read(fd int, p []byte) (n int, errno int) {
+func Read(fd int, p []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -505,13 +607,15 @@ func Read(fd int, p []byte) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Readlink(path string, buf []byte) (n int, errno int) {
+func Readlink(path string, buf []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -520,37 +624,45 @@ func Readlink(path string, buf []byte) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_READLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(_p0), uintptr(len(buf)))
 	n = int(r0)
-	errno = int(e1)
+	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) (errno int) {
+func Rename(oldpath string, newpath string) (err error) {
 	_, _, e1 := Syscall(SYS_RENAME, uintptr(unsafe.Pointer(StringBytePtr(oldpath))), uintptr(unsafe.Pointer(StringBytePtr(newpath))), 0)
-	errno = int(e1)
+	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) (errno int) {
+func Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) {
 	_, _, e1 := Syscall6(SYS_RENAMEAT, uintptr(olddirfd), uintptr(unsafe.Pointer(StringBytePtr(oldpath))), uintptr(newdirfd), uintptr(unsafe.Pointer(StringBytePtr(newpath))), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Rmdir(path string) (errno int) {
+func Rmdir(path string) (err error) {
 	_, _, e1 := Syscall(SYS_RMDIR, uintptr(unsafe.Pointer(StringBytePtr(path))), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setdomainname(p []byte) (errno int) {
+func Setdomainname(p []byte) (err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -558,13 +670,15 @@ func Setdomainname(p []byte) (errno int) {
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall(SYS_SETDOMAINNAME, uintptr(_p0), uintptr(len(p)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Sethostname(p []byte) (errno int) {
+func Sethostname(p []byte) (err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -572,56 +686,70 @@ func Sethostname(p []byte) (errno int) {
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall(SYS_SETHOSTNAME, uintptr(_p0), uintptr(len(p)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setpgid(pid int, pgid int) (errno int) {
+func Setpgid(pid int, pgid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETPGID, uintptr(pid), uintptr(pgid), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setrlimit(resource int, rlim *Rlimit) (errno int) {
+func Setrlimit(resource int, rlim *Rlimit) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setsid() (pid int, errno int) {
+func Setsid() (pid int, err error) {
 	r0, _, e1 := RawSyscall(SYS_SETSID, 0, 0, 0)
 	pid = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Settimeofday(tv *Timeval) (errno int) {
+func Settimeofday(tv *Timeval) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setuid(uid int) (errno int) {
+func Setuid(uid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETUID, uintptr(uid), 0, 0)
-	errno = int(e1)
+	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) (errno int) {
+func Symlink(oldpath string, newpath string) (err error) {
 	_, _, e1 := Syscall(SYS_SYMLINK, uintptr(unsafe.Pointer(StringBytePtr(oldpath))), uintptr(unsafe.Pointer(StringBytePtr(newpath))), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -634,35 +762,43 @@ func Sync() {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Sysinfo(info *Sysinfo_t) (errno int) {
+func Sysinfo(info *Sysinfo_t) (err error) {
 	_, _, e1 := RawSyscall(SYS_SYSINFO, uintptr(unsafe.Pointer(info)), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Tee(rfd int, wfd int, len int, flags int) (n int64, errno int) {
+func Tee(rfd int, wfd int, len int, flags int) (n int64, err error) {
 	r0, r1, e1 := Syscall6(SYS_TEE, uintptr(rfd), uintptr(wfd), uintptr(len), uintptr(flags), 0, 0)
 	n = int64(int64(r0)<<32 | int64(r1))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Tgkill(tgid int, tid int, sig int) (errno int) {
+func Tgkill(tgid int, tid int, sig int) (err error) {
 	_, _, e1 := RawSyscall(SYS_TGKILL, uintptr(tgid), uintptr(tid), uintptr(sig))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Times(tms *Tms) (ticks uintptr, errno int) {
+func Times(tms *Tms) (ticks uintptr, err error) {
 	r0, _, e1 := RawSyscall(SYS_TIMES, uintptr(unsafe.Pointer(tms)), 0, 0)
 	ticks = uintptr(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -676,63 +812,77 @@ func Umask(mask int) (oldmask int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Uname(buf *Utsname) (errno int) {
+func Uname(buf *Utsname) (err error) {
 	_, _, e1 := RawSyscall(SYS_UNAME, uintptr(unsafe.Pointer(buf)), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Unlink(path string) (errno int) {
+func Unlink(path string) (err error) {
 	_, _, e1 := Syscall(SYS_UNLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), 0, 0)
-	errno = int(e1)
+	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) (errno int) {
+func Unlinkat(dirfd int, path string) (err error) {
 	_, _, e1 := Syscall(SYS_UNLINKAT, uintptr(dirfd), uintptr(unsafe.Pointer(StringBytePtr(path))), 0)
-	errno = int(e1)
+	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) (errno int) {
+func Unmount(target string, flags int) (err error) {
 	_, _, e1 := Syscall(SYS_UMOUNT2, uintptr(unsafe.Pointer(StringBytePtr(target))), uintptr(flags), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Unshare(flags int) (errno int) {
+func Unshare(flags int) (err error) {
 	_, _, e1 := Syscall(SYS_UNSHARE, uintptr(flags), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Ustat(dev int, ubuf *Ustat_t) (errno int) {
+func Ustat(dev int, ubuf *Ustat_t) (err error) {
 	_, _, e1 := Syscall(SYS_USTAT, uintptr(dev), uintptr(unsafe.Pointer(ubuf)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Utime(path string, buf *Utimbuf) (errno int) {
+func Utime(path string, buf *Utimbuf) (err error) {
 	_, _, e1 := Syscall(SYS_UTIME, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(buf)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Write(fd int, p []byte) (n int, errno int) {
+func Write(fd int, p []byte) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -741,47 +891,57 @@ func Write(fd int, p []byte) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func exitThread(code int) (errno int) {
+func exitThread(code int) (err error) {
 	_, _, e1 := Syscall(SYS_EXIT, uintptr(code), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func read(fd int, p *byte, np int) (n int, errno int) {
+func read(fd int, p *byte, np int) (n int, err error) {
 	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(np))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func write(fd int, p *byte, np int) (n int, errno int) {
+func write(fd int, p *byte, np int) (n int, err error) {
 	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(np))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func munmap(addr uintptr, length uintptr) (errno int) {
+func munmap(addr uintptr, length uintptr) (err error) {
 	_, _, e1 := Syscall(SYS_MUNMAP, uintptr(addr), uintptr(length), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Madvise(b []byte, advice int) (errno int) {
+func Madvise(b []byte, advice int) (err error) {
 	var _p0 unsafe.Pointer
 	if len(b) > 0 {
 		_p0 = unsafe.Pointer(&b[0])
@@ -789,13 +949,15 @@ func Madvise(b []byte, advice int) (errno int) {
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall(SYS_MADVISE, uintptr(_p0), uintptr(len(b)), uintptr(advice))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Mprotect(b []byte, prot int) (errno int) {
+func Mprotect(b []byte, prot int) (err error) {
 	var _p0 unsafe.Pointer
 	if len(b) > 0 {
 		_p0 = unsafe.Pointer(&b[0])
@@ -803,13 +965,15 @@ func Mprotect(b []byte, prot int) (errno int) {
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall(SYS_MPROTECT, uintptr(_p0), uintptr(len(b)), uintptr(prot))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Mlock(b []byte) (errno int) {
+func Mlock(b []byte) (err error) {
 	var _p0 unsafe.Pointer
 	if len(b) > 0 {
 		_p0 = unsafe.Pointer(&b[0])
@@ -817,13 +981,15 @@ func Mlock(b []byte) (errno int) {
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall(SYS_MLOCK, uintptr(_p0), uintptr(len(b)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Munlock(b []byte) (errno int) {
+func Munlock(b []byte) (err error) {
 	var _p0 unsafe.Pointer
 	if len(b) > 0 {
 		_p0 = unsafe.Pointer(&b[0])
@@ -831,112 +997,138 @@ func Munlock(b []byte) (errno int) {
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall(SYS_MUNLOCK, uintptr(_p0), uintptr(len(b)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Mlockall(flags int) (errno int) {
+func Mlockall(flags int) (err error) {
 	_, _, e1 := Syscall(SYS_MLOCKALL, uintptr(flags), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Munlockall() (errno int) {
+func Munlockall() (err error) {
 	_, _, e1 := Syscall(SYS_MUNLOCKALL, 0, 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, errno int) {
+func accept(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (fd int, err error) {
 	r0, _, e1 := Syscall(SYS_ACCEPT, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func bind(s int, addr uintptr, addrlen _Socklen) (errno int) {
+func bind(s int, addr uintptr, addrlen _Socklen) (err error) {
 	_, _, e1 := Syscall(SYS_BIND, uintptr(s), uintptr(addr), uintptr(addrlen))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func connect(s int, addr uintptr, addrlen _Socklen) (errno int) {
+func connect(s int, addr uintptr, addrlen _Socklen) (err error) {
 	_, _, e1 := Syscall(SYS_CONNECT, uintptr(s), uintptr(addr), uintptr(addrlen))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func getgroups(n int, list *_Gid_t) (nn int, errno int) {
+func getgroups(n int, list *_Gid_t) (nn int, err error) {
 	r0, _, e1 := RawSyscall(SYS_GETGROUPS32, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
 	nn = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func setgroups(n int, list *_Gid_t) (errno int) {
+func setgroups(n int, list *_Gid_t) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETGROUPS32, uintptr(n), uintptr(unsafe.Pointer(list)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (err error) {
 	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (errno int) {
+func setsockopt(s int, level int, name int, val uintptr, vallen uintptr) (err error) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func socket(domain int, typ int, proto int) (fd int, errno int) {
+func socket(domain int, typ int, proto int) (fd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_SOCKET, uintptr(domain), uintptr(typ), uintptr(proto))
 	fd = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int) {
+func getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
 	_, _, e1 := RawSyscall(SYS_GETPEERNAME, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int) {
+func getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
 	_, _, e1 := RawSyscall(SYS_GETSOCKNAME, uintptr(fd), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, errno int) {
+func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -945,13 +1137,15 @@ func recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Sockl
 	}
 	r0, _, e1 := Syscall6(SYS_RECVFROM, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen)))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (errno int) {
+func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -959,64 +1153,80 @@ func sendto(s int, buf []byte, flags int, to uintptr, addrlen _Socklen) (errno i
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall6(SYS_SENDTO, uintptr(s), uintptr(_p0), uintptr(len(buf)), uintptr(flags), uintptr(to), uintptr(addrlen))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func socketpair(domain int, typ int, flags int, fd *[2]int) (errno int) {
+func socketpair(domain int, typ int, flags int, fd *[2]int) (err error) {
 	_, _, e1 := RawSyscall6(SYS_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd)), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func recvmsg(s int, msg *Msghdr, flags int) (n int, errno int) {
+func recvmsg(s int, msg *Msghdr, flags int) (n int, err error) {
 	r0, _, e1 := Syscall(SYS_RECVMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func sendmsg(s int, msg *Msghdr, flags int) (errno int) {
+func sendmsg(s int, msg *Msghdr, flags int) (err error) {
 	_, _, e1 := Syscall(SYS_SENDMSG, uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Chown(path string, uid int, gid int) (errno int) {
+func Chown(path string, uid int, gid int) (err error) {
 	_, _, e1 := Syscall(SYS_CHOWN, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(uid), uintptr(gid))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fchown(fd int, uid int, gid int) (errno int) {
+func Fchown(fd int, uid int, gid int) (err error) {
 	_, _, e1 := Syscall(SYS_FCHOWN, uintptr(fd), uintptr(uid), uintptr(gid))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fstat(fd int, stat *Stat_t) (errno int) {
+func Fstat(fd int, stat *Stat_t) (err error) {
 	_, _, e1 := Syscall(SYS_FSTAT64, uintptr(fd), uintptr(unsafe.Pointer(stat)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Fstatfs(fd int, buf *Statfs_t) (errno int) {
+func Fstatfs(fd int, buf *Statfs_t) (err error) {
 	_, _, e1 := Syscall(SYS_FSTATFS64, uintptr(fd), uintptr(unsafe.Pointer(buf)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -1054,157 +1264,195 @@ func Getuid() (uid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Lchown(path string, uid int, gid int) (errno int) {
+func Lchown(path string, uid int, gid int) (err error) {
 	_, _, e1 := Syscall(SYS_LCHOWN, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(uid), uintptr(gid))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Listen(s int, n int) (errno int) {
+func Listen(s int, n int) (err error) {
 	_, _, e1 := Syscall(SYS_LISTEN, uintptr(s), uintptr(n), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Lstat(path string, stat *Stat_t) (errno int) {
+func Lstat(path string, stat *Stat_t) (err error) {
 	_, _, e1 := Syscall(SYS_LSTAT64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(stat)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Sendfile(outfd int, infd int, offset *int64, count int) (written int, errno int) {
+func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
 	r0, _, e1 := Syscall6(SYS_SENDFILE64, uintptr(outfd), uintptr(infd), uintptr(unsafe.Pointer(offset)), uintptr(count), 0, 0)
 	written = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, errno int) {
+func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
 	r0, _, e1 := Syscall6(SYS__NEWSELECT, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setfsgid(gid int) (errno int) {
+func Setfsgid(gid int) (err error) {
 	_, _, e1 := Syscall(SYS_SETFSGID, uintptr(gid), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setfsuid(uid int) (errno int) {
+func Setfsuid(uid int) (err error) {
 	_, _, e1 := Syscall(SYS_SETFSUID, uintptr(uid), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setgid(gid int) (errno int) {
+func Setgid(gid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETGID, uintptr(gid), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setregid(rgid int, egid int) (errno int) {
+func Setregid(rgid int, egid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETREGID, uintptr(rgid), uintptr(egid), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setresgid(rgid int, egid int, sgid int) (errno int) {
+func Setresgid(rgid int, egid int, sgid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETRESGID, uintptr(rgid), uintptr(egid), uintptr(sgid))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setresuid(ruid int, euid int, suid int) (errno int) {
+func Setresuid(ruid int, euid int, suid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETRESUID, uintptr(ruid), uintptr(euid), uintptr(suid))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setreuid(ruid int, euid int) (errno int) {
+func Setreuid(ruid int, euid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETREUID, uintptr(ruid), uintptr(euid), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Shutdown(fd int, how int) (errno int) {
+func Shutdown(fd int, how int) (err error) {
 	_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(fd), uintptr(how), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, errno int) {
+func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) {
 	r0, _, e1 := Syscall6(SYS_SPLICE, uintptr(rfd), uintptr(unsafe.Pointer(roff)), uintptr(wfd), uintptr(unsafe.Pointer(woff)), uintptr(len), uintptr(flags))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Stat(path string, stat *Stat_t) (errno int) {
+func Stat(path string, stat *Stat_t) (err error) {
 	_, _, e1 := Syscall(SYS_STAT64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(stat)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Statfs(path string, buf *Statfs_t) (errno int) {
+func Statfs(path string, buf *Statfs_t) (err error) {
 	_, _, e1 := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(buf)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Gettimeofday(tv *Timeval) (errno int) {
+func Gettimeofday(tv *Timeval) (err error) {
 	_, _, e1 := RawSyscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tv)), 0, 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Time(t *Time_t) (tt Time_t, errno int) {
+func Time(t *Time_t) (tt Time_t, err error) {
 	r0, _, e1 := RawSyscall(SYS_TIME, uintptr(unsafe.Pointer(t)), 0, 0)
 	tt = Time_t(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, errno int) {
+func mmap2(addr uintptr, length uintptr, prot int, flags int, fd int, pageOffset uintptr) (xaddr uintptr, err error) {
 	r0, _, e1 := Syscall6(SYS_MMAP2, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flags), uintptr(fd), uintptr(pageOffset))
 	xaddr = uintptr(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }