subhamkrai
c938849cf8
using defer for closing file which are open for writing is not safe. so closing file again following below steps: 1. open files 2. defer file.close() 3. write 4.file.close() these will make sure files are closed. Signed-off-by: subhamkrai <subhamkumarrai03@gmail.com>
77 lines
2.1 KiB
Go
77 lines
2.1 KiB
Go
/*
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Copyright 2019 The Rook Authors. All rights reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 util
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import (
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"io"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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)
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// override these for unit testing
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var defaultRookDir = "/usr/local/bin"
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var defaultTiniDir = "/"
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// CopyBinaries copies the "tini" and "rook" binaries to a shared volume at the target path.
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func CopyBinaries(target string) error {
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if err := copyBinary(defaultRookDir, target, "rook"); err != nil {
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return err
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}
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return copyBinary(defaultTiniDir, target, "tini")
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}
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// #nosec G307 Calling defer to close the file without checking the error return is not a risk for a simple file open and close
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func copyBinary(sourceDir, targetDir, filename string) error {
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sourcePath := path.Join(sourceDir, filename)
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targetPath := path.Join(targetDir, filename)
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logger.Infof("copying %s to %s", sourcePath, targetPath)
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// Check if the source path exists, and look in PATH if it doesn't
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if _, err := os.Stat(sourcePath); err != nil {
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if sourcePath, err = exec.LookPath(filename); err != nil {
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return err
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}
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}
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// Check if the target path exists, and skip the copy if it does
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if _, err := os.Stat(targetPath); err == nil {
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return nil
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}
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sourceFile, err := os.Open(filepath.Clean(sourcePath))
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if err != nil {
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return err
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}
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defer sourceFile.Close()
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destinationFile, err := os.Create(filepath.Clean(targetPath))
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if err != nil {
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return err
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}
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defer destinationFile.Close()
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if _, err := io.Copy(destinationFile, sourceFile); err != nil {
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return err
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}
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if err := destinationFile.Close(); err != nil {
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return err
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}
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// #nosec targetPath requires the permission to execute
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return os.Chmod(targetPath, 0700)
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}
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