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Current Path: /opt/golang/1.22.0/src/os/exec

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📁 ..
📄 bench_test.go(492 B)
📄 dot_test.go(6.13 KB)
📄 env_test.go(1.66 KB)
📄 example_test.go(3.49 KB)
📄 exec.go(41.16 KB)
📄 exec_linux_test.go(1.23 KB)
📄 exec_other_test.go(286 B)
📄 exec_plan9.go(608 B)
📄 exec_posix_test.go(6.79 KB)
📄 exec_test.go(47.62 KB)
📄 exec_unix.go(635 B)
📄 exec_unix_test.go(313 B)
📄 exec_windows.go(721 B)
📄 exec_windows_test.go(2.37 KB)
📁 internal
📄 internal_test.go(1.21 KB)
📄 lp_linux_test.go(2.33 KB)
📄 lp_plan9.go(1.94 KB)
📄 lp_test.go(737 B)
📄 lp_unix.go(2.44 KB)
📄 lp_unix_test.go(762 B)
📄 lp_wasm.go(1012 B)
📄 lp_windows.go(5.98 KB)
📄 lp_windows_test.go(16.31 KB)
📄 read3.go(2.16 KB)

Editing: lp_plan9.go

// Copyright 2011 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

import (
	"errors"
	"io/fs"
	"os"
	"path/filepath"
	"strings"
)

// ErrNotFound is the error resulting if a path search failed to find an executable file.
var ErrNotFound = errors.New("executable file not found in $path")

func findExecutable(file string) error {
	d, err := os.Stat(file)
	if err != nil {
		return err
	}
	if m := d.Mode(); !m.IsDir() && m&0111 != 0 {
		return nil
	}
	return fs.ErrPermission
}

// LookPath searches for an executable named file in the
// directories named by the path environment variable.
// If file begins with "/", "#", "./", or "../", it is tried
// directly and the path is not consulted.
// On success, the result is an absolute path.
//
// In older versions of Go, LookPath could return a path relative to the current directory.
// As of Go 1.19, LookPath will instead return that path along with an error satisfying
// errors.Is(err, ErrDot). See the package documentation for more details.
func LookPath(file string) (string, error) {
	// skip the path lookup for these prefixes
	skip := []string{"/", "#", "./", "../"}

for _, p := range skip {
		if strings.HasPrefix(file, p) {
			err := findExecutable(file)
			if err == nil {
				return file, nil
			}
			return "", &Error{file, err}
		}
	}

path := os.Getenv("path")
	for _, dir := range filepath.SplitList(path) {
		path := filepath.Join(dir, file)
		if err := findExecutable(path); err == nil {
			if !filepath.IsAbs(path) {
				if execerrdot.Value() != "0" {
					return path, &Error{file, ErrDot}
				}
				execerrdot.IncNonDefault()
			}
			return path, nil
		}
	}
	return "", &Error{file, ErrNotFound}
}

// lookExtensions is a no-op on non-Windows platforms, since
// they do not restrict executables to specific extensions.
func lookExtensions(path, dir string) (string, error) {
	return path, nil
}

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Editing: lp_plan9.go

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