mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
4177fddcc4
This change imports the modifying runtime abstraction from the experimental branch. This encapsulates the checks for whether modification is required, and forwards the loaded spec to the specified modifier. This allows for the same code to be reused when performing more complex modifications. Signed-off-by: Evan Lezar <elezar@nvidia.com>
66 lines
1.9 KiB
Go
66 lines
1.9 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 oci
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import (
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"fmt"
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"os"
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log "github.com/sirupsen/logrus"
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)
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// pathRuntime wraps the path that a binary and defines the semanitcs for how to exec into it.
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// This can be used to wrap an OCI-compliant low-level runtime binary, allowing it to be used through the
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// Runtime internface.
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type pathRuntime struct {
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logger *log.Logger
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path string
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execRuntime Runtime
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}
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var _ Runtime = (*pathRuntime)(nil)
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// NewRuntimeForPath creates a Runtime for the specified logger and path
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func NewRuntimeForPath(logger *log.Logger, path string) (Runtime, error) {
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info, err := os.Stat(path)
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if err != nil {
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return nil, fmt.Errorf("invalid path '%v': %v", path, err)
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}
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if info.IsDir() || info.Mode()&0111 == 0 {
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return nil, fmt.Errorf("specified path '%v' is not an executable file", path)
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}
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shim := pathRuntime{
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logger: logger,
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path: path,
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execRuntime: syscallExec{},
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}
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return &shim, nil
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}
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// Exec exces into the binary at the path from the pathRuntime struct, passing it the supplied arguments
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// after ensuring that the first argument is the path of the target binary.
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func (s pathRuntime) Exec(args []string) error {
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runtimeArgs := []string{s.path}
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if len(args) > 1 {
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runtimeArgs = append(runtimeArgs, args[1:]...)
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}
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return s.execRuntime.Exec(runtimeArgs)
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}
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