Imported Upstream version 1upstream/1

1 files changed, 396 insertions, 198 deletions

diff --git a/src/pkg/syscall/zsyscall_darwin_amd64.go b/src/pkg/syscall/zsyscall_darwin_amd64.go
index e26fed46f..104ee5513 100644
--- a/src/pkg/syscall/zsyscall_darwin_amd64.go
+++ b/src/pkg/syscall/zsyscall_darwin_amd64.go
@@ -7,115 +7,141 @@ import "unsafe"
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func getgroups(ngid int, gid *_Gid_t) (n int, errno int) {
+func getgroups(ngid int, gid *_Gid_t) (n int, err error) {
 	r0, _, e1 := RawSyscall(SYS_GETGROUPS, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 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 setgroups(ngid int, gid *_Gid_t) (errno int) {
+func setgroups(ngid int, gid *_Gid_t) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETGROUPS, uintptr(ngid), uintptr(unsafe.Pointer(gid)), 0)
-	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 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 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 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 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 Shutdown(s int, how int) (errno int) {
+func Shutdown(s int, how int) (err error) {
 	_, _, e1 := Syscall(SYS_SHUTDOWN, uintptr(s), 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 socketpair(domain int, typ int, proto int, fd *[2]int) (errno int) {
+func socketpair(domain int, typ int, proto int, fd *[2]int) (err error) {
 	_, _, e1 := RawSyscall6(SYS_SOCKETPAIR, uintptr(domain), uintptr(typ), uintptr(proto), 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 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])
@@ -124,13 +150,15 @@ 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])
@@ -138,39 +166,47 @@ 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 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 kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, errno int) {
+func kevent(kq int, change uintptr, nchange int, event uintptr, nevent int, timeout *Timespec) (n int, err error) {
 	r0, _, e1 := Syscall6(SYS_KEVENT, uintptr(kq), uintptr(change), uintptr(nchange), uintptr(event), uintptr(nevent), uintptr(unsafe.Pointer(timeout)))
 	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 sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (errno int) {
+func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) {
 	var _p0 unsafe.Pointer
 	if len(mib) > 0 {
 		_p0 = unsafe.Pointer(&mib[0])
@@ -178,147 +214,183 @@ func sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr)
 		_p0 = unsafe.Pointer(&_zero)
 	}
 	_, _, e1 := Syscall6(SYS___SYSCTL, uintptr(_p0), uintptr(len(mib)), uintptr(unsafe.Pointer(old)), uintptr(unsafe.Pointer(oldlen)), uintptr(unsafe.Pointer(new)), uintptr(newlen))
-	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, timeval *[2]Timeval) (errno int) {
+func utimes(path string, timeval *[2]Timeval) (err error) {
 	_, _, e1 := Syscall(SYS_UTIMES, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(timeval)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func futimes(fd int, timeval *[2]Timeval) (errno int) {
+func futimes(fd int, timeval *[2]Timeval) (err error) {
 	_, _, e1 := Syscall(SYS_FUTIMES, uintptr(fd), uintptr(unsafe.Pointer(timeval)), 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 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 pipe() (r int, w int, errno int) {
+func pipe() (r int, w int, err error) {
 	r0, r1, e1 := RawSyscall(SYS_PIPE, 0, 0, 0)
 	r = int(r0)
 	w = int(r1)
-	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, signum int, posix int) (errno int) {
+func kill(pid int, signum int, posix int) (err error) {
 	_, _, e1 := Syscall(SYS_KILL, uintptr(pid), uintptr(signum), uintptr(posix))
-	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 Adjtime(delta *Timeval, olddelta *Timeval) (errno int) {
+func Adjtime(delta *Timeval, olddelta *Timeval) (err error) {
 	_, _, e1 := Syscall(SYS_ADJTIME, uintptr(unsafe.Pointer(delta)), uintptr(unsafe.Pointer(olddelta)), 0)
-	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 Chflags(path string, flags int) (errno int) {
+func Chflags(path string, flags int) (err error) {
 	_, _, e1 := Syscall(SYS_CHFLAGS, uintptr(unsafe.Pointer(StringBytePtr(path))), 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 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 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 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 Dup(fd int) (nfd int, errno int) {
+func Dup(fd int) (nfd int, err error) {
 	r0, _, e1 := RawSyscall(SYS_DUP, uintptr(fd), 0, 0)
 	nfd = 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(from int, to int) (errno int) {
+func Dup2(from int, to int) (err error) {
 	_, _, e1 := RawSyscall(SYS_DUP2, uintptr(from), uintptr(to), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Exchangedata(path1 string, path2 string, options int) (errno int) {
+func Exchangedata(path1 string, path2 string, options int) (err error) {
 	_, _, e1 := Syscall(SYS_EXCHANGEDATA, uintptr(unsafe.Pointer(StringBytePtr(path1))), uintptr(unsafe.Pointer(StringBytePtr(path2))), uintptr(options))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -331,88 +403,108 @@ func Exit(code int) {
 
 // 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 Fchflags(path string, flags int) (errno int) {
+func Fchflags(path string, flags int) (err error) {
 	_, _, e1 := Syscall(SYS_FCHFLAGS, uintptr(unsafe.Pointer(StringBytePtr(path))), 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 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 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 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 Fpathconf(fd int, name int) (val int, errno int) {
+func Fpathconf(fd int, name int) (val int, err error) {
 	r0, _, e1 := Syscall(SYS_FPATHCONF, uintptr(fd), uintptr(name), 0)
 	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 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, stat *Statfs_t) (errno int) {
+func Fstatfs(fd int, stat *Statfs_t) (err error) {
 	_, _, e1 := Syscall(SYS_FSTATFS64, 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 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 Ftruncate(fd int, length int64) (errno int) {
+func Ftruncate(fd int, length int64) (err error) {
 	_, _, e1 := Syscall(SYS_FTRUNCATE, uintptr(fd), 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 Getdirentries(fd int, buf []byte, basep *uintptr) (n int, errno int) {
+func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -421,7 +513,9 @@ func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall6(SYS_GETDIRENTRIES64, uintptr(fd), uintptr(_p0), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -451,7 +545,7 @@ func Geteuid() (uid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getfsstat(buf []Statfs_t, flags int) (n int, errno int) {
+func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(buf) > 0 {
 		_p0 = unsafe.Pointer(&buf[0])
@@ -460,7 +554,9 @@ func Getfsstat(buf []Statfs_t, flags int) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall(SYS_GETFSSTAT64, uintptr(_p0), uintptr(len(buf)), uintptr(flags))
 	n = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -474,10 +570,12 @@ func Getgid() (gid int) {
 
 // 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
 }
 
@@ -507,35 +605,43 @@ func Getppid() (ppid int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getpriority(which int, who int) (prio int, errno int) {
+func Getpriority(which int, who int) (prio int, err error) {
 	r0, _, e1 := Syscall(SYS_GETPRIORITY, uintptr(which), uintptr(who), 0)
 	prio = 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 Getrlimit(which int, lim *Rlimit) (errno int) {
+func Getrlimit(which int, lim *Rlimit) (err error) {
 	_, _, e1 := RawSyscall(SYS_GETRLIMIT, uintptr(which), uintptr(unsafe.Pointer(lim)), 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
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Getsid(pid int) (sid int, errno int) {
+func Getsid(pid int) (sid int, err error) {
 	r0, _, e1 := RawSyscall(SYS_GETSID, uintptr(pid), 0, 0)
 	sid = int(r0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -557,90 +663,110 @@ func Issetugid() (tainted bool) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Kqueue() (fd int, errno int) {
+func Kqueue() (fd int, err error) {
 	r0, _, e1 := Syscall(SYS_KQUEUE, 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 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 Link(path string, link string) (errno int) {
+func Link(path string, link string) (err error) {
 	_, _, e1 := Syscall(SYS_LINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(StringBytePtr(link))), 0)
-	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, backlog int) (errno int) {
+func Listen(s int, backlog int) (err error) {
 	_, _, e1 := Syscall(SYS_LISTEN, uintptr(s), uintptr(backlog), 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 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 Mkfifo(path string, mode uint32) (errno int) {
+func Mkfifo(path string, mode uint32) (err error) {
 	_, _, e1 := Syscall(SYS_MKFIFO, 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 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 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 Pathconf(path string, name int) (val int, errno int) {
+func Pathconf(path string, name int) (val int, err error) {
 	r0, _, e1 := Syscall(SYS_PATHCONF, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(name), 0)
 	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 Pread(fd int, p []byte, offset int64) (n int, errno int) {
+func Pread(fd int, p []byte, offset int64) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -649,13 +775,15 @@ func Pread(fd int, p []byte, offset int64) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall6(SYS_PREAD, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 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 Pwrite(fd int, p []byte, offset int64) (n int, errno int) {
+func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
 	var _p0 unsafe.Pointer
 	if len(p) > 0 {
 		_p0 = unsafe.Pointer(&p[0])
@@ -664,13 +792,15 @@ func Pwrite(fd int, p []byte, offset int64) (n int, errno int) {
 	}
 	r0, _, e1 := Syscall6(SYS_PWRITE, uintptr(fd), uintptr(_p0), uintptr(len(p)), uintptr(offset), 0, 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 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])
@@ -679,13 +809,15 @@ 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])
@@ -694,193 +826,241 @@ 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(from string, to string) (errno int) {
+func Rename(from string, to string) (err error) {
 	_, _, e1 := Syscall(SYS_RENAME, uintptr(unsafe.Pointer(StringBytePtr(from))), uintptr(unsafe.Pointer(StringBytePtr(to))), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Revoke(path string) (errno int) {
+func Revoke(path string) (err error) {
 	_, _, e1 := Syscall(SYS_REVOKE, 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 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 Seek(fd int, offset int64, whence int) (newoffset int64, errno int) {
+func Seek(fd int, offset int64, whence int) (newoffset int64, err error) {
 	r0, _, e1 := Syscall(SYS_LSEEK, uintptr(fd), uintptr(offset), uintptr(whence))
 	newoffset = int64(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(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (errno int) {
+func Select(n int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (err error) {
 	_, _, e1 := Syscall6(SYS_SELECT, uintptr(n), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setegid(egid int) (errno int) {
+func Setegid(egid int) (err error) {
 	_, _, e1 := Syscall(SYS_SETEGID, uintptr(egid), 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 Seteuid(euid int) (errno int) {
+func Seteuid(euid int) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETEUID, uintptr(euid), 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 Setlogin(name string) (errno int) {
+func Setlogin(name string) (err error) {
 	_, _, e1 := Syscall(SYS_SETLOGIN, uintptr(unsafe.Pointer(StringBytePtr(name))), 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 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 Setpriority(which int, who int, prio int) (errno int) {
+func Setpriority(which int, who int, prio int) (err error) {
 	_, _, e1 := Syscall(SYS_SETPRIORITY, uintptr(which), uintptr(who), uintptr(prio))
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Setprivexec(flag int) (errno int) {
+func Setprivexec(flag int) (err error) {
 	_, _, e1 := Syscall(SYS_SETPRIVEXEC, uintptr(flag), 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 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 Setrlimit(which int, lim *Rlimit) (errno int) {
+func Setrlimit(which int, lim *Rlimit) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETRLIMIT, uintptr(which), uintptr(unsafe.Pointer(lim)), 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(tp *Timeval) (errno int) {
+func Settimeofday(tp *Timeval) (err error) {
 	_, _, e1 := RawSyscall(SYS_SETTIMEOFDAY, uintptr(unsafe.Pointer(tp)), 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 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, stat *Statfs_t) (errno int) {
+func Statfs(path string, stat *Statfs_t) (err error) {
 	_, _, e1 := Syscall(SYS_STATFS64, 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 Symlink(path string, link string) (errno int) {
+func Symlink(path string, link string) (err error) {
 	_, _, e1 := Syscall(SYS_SYMLINK, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(unsafe.Pointer(StringBytePtr(link))), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Sync() (errno int) {
+func Sync() (err error) {
 	_, _, e1 := Syscall(SYS_SYNC, 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 Truncate(path string, length int64) (errno int) {
+func Truncate(path string, length int64) (err error) {
 	_, _, e1 := Syscall(SYS_TRUNCATE, uintptr(unsafe.Pointer(StringBytePtr(path))), uintptr(length), 0)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }
 
@@ -894,31 +1074,37 @@ func Umask(newmask int) (oldmask int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func Undelete(path string) (errno int) {
+func Undelete(path string) (err error) {
 	_, _, e1 := Syscall(SYS_UNDELETE, 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 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 Unmount(path string, flags int) (errno int) {
+func Unmount(path string, flags int) (err error) {
 	_, _, e1 := Syscall(SYS_UNMOUNT, uintptr(unsafe.Pointer(StringBytePtr(path))), 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 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])
@@ -927,51 +1113,63 @@ 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 mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, errno int) {
+func mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error) {
 	r0, _, e1 := Syscall6(SYS_MMAP, uintptr(addr), uintptr(length), uintptr(prot), uintptr(flag), uintptr(fd), uintptr(pos))
 	ret = uintptr(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 read(fd int, buf *byte, nbuf int) (n int, errno int) {
+func read(fd int, buf *byte, nbuf int) (n int, err error) {
 	r0, _, e1 := Syscall(SYS_READ, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	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, buf *byte, nbuf int) (n int, errno int) {
+func write(fd int, buf *byte, nbuf int) (n int, err error) {
 	r0, _, e1 := Syscall(SYS_WRITE, uintptr(fd), uintptr(unsafe.Pointer(buf)), uintptr(nbuf))
 	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 gettimeofday(tp *Timeval) (sec int64, usec int32, errno int) {
+func gettimeofday(tp *Timeval) (sec int64, usec int32, err error) {
 	r0, r1, e1 := RawSyscall(SYS_GETTIMEOFDAY, uintptr(unsafe.Pointer(tp)), 0, 0)
 	sec = int64(r0)
 	usec = int32(r1)
-	errno = int(e1)
+	if e1 != 0 {
+		err = e1
+	}
 	return
 }