39 lines
984 B
Go
39 lines
984 B
Go
package fs
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import (
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"os"
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"path/filepath"
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"github.com/google/uuid"
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)
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// SymlinksSupported tests if a storage path supports symlinks.
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func SymlinksSupported(storagePath string) (bool, error) {
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linkName := filepath.Join(storagePath, uuid.NewString()+"-link.tmp")
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targetName := filepath.Join(storagePath, uuid.NewString()+".tmp")
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// Delete files after test.
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defer func(link, target string) {
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_ = os.Remove(link)
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_ = os.Remove(target)
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}(linkName, targetName)
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// Create empty test target file.
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if targetFile, err := os.OpenFile(targetName, os.O_RDONLY|os.O_CREATE, os.ModePerm); err != nil {
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return false, err
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} else if err = targetFile.Close(); err != nil {
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return false, err
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}
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// Create test link.
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if err := os.Symlink(filepath.Base(targetName), linkName); err != nil {
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return false, err
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}
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// Resolve and compare test target.
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if linkTarget, err := Resolve(linkName); err != nil {
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return false, err
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} else {
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return linkTarget == targetName, nil
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}
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}
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