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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Process etc.
package os
import (
var Args []string; // provided by runtime
var Envs []string; // provided by runtime
// Getuid returns the numeric user id of the caller.
func Getuid() int {
return syscall.Getuid();
// Geteuid returns the numeric effective user id of the caller.
func Geteuid() int {
return syscall.Geteuid();
// Getgid returns the numeric group id of the caller.
func Getgid() int {
return syscall.Getgid();
// Getegid returns the numeric effective group id of the caller.
func Getegid() int {
return syscall.Getegid();
// Getgroups returns a list of the numeric ids of groups that the caller belongs to.
func Getgroups() ([]int, os.Error) {
gids, errno := syscall.Getgroups();
return gids, NewSyscallError("getgroups", errno);
// Exit causes the current program to exit with the given status code.
// Conventionally, code zero indicates success, non-zero an error.
func Exit(code int) {