return mode
}

// SetMode sets the global telemetry mode to the given value.
//
// See the documentation of [Mode] for a description of the supported mode
// values.
//
// An error is returned if the provided mode value is invalid, or if an error
// occurs while persisting the mode value to the file system.
func SetMode(mode string) error {
	return telemetry.Default.SetMode(mode)

// This file holds stub versions of the cgo functions called on Unix systems.
// We build this file:
// - if using the netgo build tag on a Unix system
// - on a Unix system without the cgo resolver functions
//   (Darwin always provides the cgo functions, in cgo_unix_syscall.go)
// - on wasip1, where cgo is never available

//go:build (netgo && unix) || (unix && !cgo && !darwin) || js || wasip1

package net

import "context"

// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

// mmap calls the mmap system call. It is implemented in assembly.
// We only pass the lower 32 bits of file offset to the
// assembly routine; the higher bits (if required), should be provided
// by the assembly routine as 0.
// The err result is an OS error code such as ENOMEM.
func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (p unsafe.Pointer, err int)

package tar

import (
	"errors"
	"fmt"
	"io"
	"io/fs"
	"path"
	"slices"
	"strings"
	"time"
)

// Writer provides sequential writing of a tar archive.
// [Writer.WriteHeader] begins a new file with the provided [Header],
// and then Writer can be treated as an io.Writer to supply that file's data.
type Writer struct {
	w    io.Writer

stderr '^flag provided but not defined: -unknownflag'

! go run -unknownflag oops rsc.io/fortune/nonexist@v0.0.1
! stderr switching
stderr '^flag provided but not defined: -unknownflag'

# go run can handle unknown flag with argument.
! go run -unknown=flag rsc.io/fortune/nonexist@v0.0.1
stderr '^go: rsc.io/fortune@v0.0.1 requires go >= 1.21rc999; switching to go1.22.9$'
stderr '^flag provided but not defined: -unknown'

// Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
//
// Developed at SunPro, a Sun Microsystems, Inc. business.
// Permission to use, copy, modify, and distribute this
// software is freely granted, provided that this notice
// is preserved.
// ====================================================
//
// expm1(x)
// Returns exp(x)-1, the exponential of x minus 1.
//
// Method
//   1. Argument reduction:

}

var ErrTooNew = errors.New("module too new")

func (e *TooNewError) Is(err error) bool {
	return err == ErrTooNew
}

// A Switcher provides the ability to switch to a new toolchain in response to TooNewErrors.
// See [cmd/go/internal/toolchain.Switcher] for documentation.
type Switcher interface {
	Error(err error)
	Switch(ctx context.Context)

// Copyright 2022 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.

// Package osinfo provides OS metadata.

// - RUnlock -> Lock:  writerSem
//
// The methods below temporarily disable handling of race synchronization
// events in order to provide the more precise model above to the race
// detector.
//
// For example, atomic.AddInt32 in RLock should not appear to provide
// acquire-release semantics, which would incorrectly synchronize racing
// readers, thus potentially missing races.

// RLock locks rw for reading.
//