mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 21:14:00 +00:00
88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
/*
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# Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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*/
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package lookup
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import (
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"fmt"
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"os"
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"strings"
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"github.com/NVIDIA/nvidia-container-toolkit/internal/logger"
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)
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type executable struct {
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file
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}
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// NewExecutableLocator creates a locator to fine executable files in the path. A logger can also be specified.
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func NewExecutableLocator(logger logger.Interface, root string) Locator {
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paths := GetPaths(root)
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return newExecutableLocator(logger, root, paths...)
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}
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func newExecutableLocator(logger logger.Interface, root string, paths ...string) *executable {
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f := newFileLocator(
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WithLogger(logger),
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WithRoot(root),
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WithSearchPaths(paths...),
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WithFilter(assertExecutable),
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WithCount(1),
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)
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l := executable{
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file: *f,
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}
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return &l
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}
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var _ Locator = (*executable)(nil)
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// Locate finds executable files with the specified pattern in the path.
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// If a relative or absolute path is specified, the prefix paths are not considered.
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func (p executable) Locate(pattern string) ([]string, error) {
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// For absolute paths we ensure that it is executable
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if strings.Contains(pattern, "/") {
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err := assertExecutable(pattern)
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if err != nil {
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return nil, fmt.Errorf("absolute path %v is not an executable file: %v", pattern, err)
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}
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return []string{pattern}, nil
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}
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return p.file.Locate(pattern)
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}
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// assertExecutable checks whether the specified path is an execuable file.
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func assertExecutable(filename string) error {
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err := assertFile(filename)
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if err != nil {
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return err
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}
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info, err := os.Stat(filename)
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if err != nil {
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return err
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}
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if info.Mode()&0111 == 0 {
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return fmt.Errorf("specified file '%v' is not executable", filename)
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}
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return nil
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}
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