111 lines
2.4 KiB
Go
111 lines
2.4 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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package filesystem
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import (
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"os"
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"path/filepath"
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"syscall"
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"time"
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)
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func GetEntryFromPath(path string) (EntryInfo, error) {
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fileInfo, err := os.Lstat(path)
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if err != nil {
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return EntryInfo{}, err
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}
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return GetEntryInfo(path, fileInfo), nil
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}
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func GetEntryInfo(path string, fileInfo os.FileInfo) EntryInfo {
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fileMode := fileInfo.Mode()
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var symlinkTarget *string
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if fileMode&os.ModeSymlink != 0 {
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// If we can't resolve the symlink target, we won't set the target
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target := followSymlink(path)
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symlinkTarget = &target
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}
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var entryType FileType
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var mode os.FileMode
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if symlinkTarget == nil {
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entryType = getEntryType(fileMode)
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mode = fileMode.Perm()
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} else {
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// If it's a symlink, we need to determine the type of the target
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targetInfo, err := os.Stat(*symlinkTarget)
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if err != nil {
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entryType = UnknownFileType
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} else {
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entryType = getEntryType(targetInfo.Mode())
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mode = targetInfo.Mode().Perm()
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}
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}
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entry := EntryInfo{
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Name: fileInfo.Name(),
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Path: path,
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Type: entryType,
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Size: fileInfo.Size(),
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Mode: mode,
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Permissions: fileMode.String(),
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ModifiedTime: fileInfo.ModTime(),
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SymlinkTarget: symlinkTarget,
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}
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if base := getBase(fileInfo.Sys()); base != nil {
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entry.AccessedTime = toTimestamp(base.Atim)
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entry.CreatedTime = toTimestamp(base.Ctim)
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entry.ModifiedTime = toTimestamp(base.Mtim)
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entry.UID = base.Uid
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entry.GID = base.Gid
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} else if !fileInfo.ModTime().IsZero() {
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entry.ModifiedTime = fileInfo.ModTime()
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}
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return entry
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}
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// getEntryType determines the type of file entry based on its mode and path.
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// If the file is a symlink, it follows the symlink to determine the actual type.
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func getEntryType(mode os.FileMode) FileType {
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switch {
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case mode.IsRegular():
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return FileFileType
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case mode.IsDir():
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return DirectoryFileType
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case mode&os.ModeSymlink == os.ModeSymlink:
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return SymlinkFileType
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default:
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return UnknownFileType
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}
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}
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// followSymlink resolves a symbolic link to its target path.
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func followSymlink(path string) string {
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// Resolve symlinks
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resolvedPath, err := filepath.EvalSymlinks(path)
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if err != nil {
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return path
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}
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return resolvedPath
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}
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func toTimestamp(spec syscall.Timespec) time.Time {
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if spec.Sec == 0 && spec.Nsec == 0 {
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return time.Time{}
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}
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return time.Unix(spec.Sec, spec.Nsec)
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}
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func getBase(sys any) *syscall.Stat_t {
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st, _ := sys.(*syscall.Stat_t)
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return st
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}
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