exec.go

// 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.

// Package exec runs external commands. It wraps os.StartProcess to make it
// easier to remap stdin and stdout, connect I/O with pipes, and do other
// adjustments.
//
// Unlike the "system" library call from C and other languages, the
// os/exec package intentionally does not invoke the system shell and
// does not expand any glob patterns or handle other expansions,
// pipelines, or redirections typically done by shells. The package
// behaves more like C's "exec" family of functions. To expand glob
// patterns, either call the shell directly, taking care to escape any
// dangerous input, or use the path/filepath package's Glob function.
// To expand environment variables, use package os's ExpandEnv.
//
// Note that the examples in this package assume a Unix system.
// They may not run on Windows, and they do not run in the Go Playground
// used by golang.org and godoc.org.
package lpenv

import (
	"strconv"
)

// Error is returned by LookPathEnv when it fails to classify a file as an
// executable.
type Error struct {
	// Name is the file name for which the error occurred.
	Name string
	// Err is the underlying error.
	Err error
}

func (e *Error) Error() string {
	return "exec: " + strconv.Quote(e.Name) + ": " + e.Err.Error()
}

func (e *Error) Unwrap() error { return e.Err }