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48dbefc37e
The actual implementation still relies on file paths, but with the abstraction layer in place, an FS implementation can ensure atomic file accesses in the future.
87 lines
2.7 KiB
Go
87 lines
2.7 KiB
Go
package fs
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import (
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"fmt"
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"os"
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)
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// MkdirAll creates a directory named path, along with any necessary parents,
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// and returns nil, or else returns an error. The permission bits perm are used
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// for all directories that MkdirAll creates. If path is already a directory,
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// MkdirAll does nothing and returns nil.
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func MkdirAll(path string, perm os.FileMode) error {
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return os.MkdirAll(fixpath(path), perm)
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}
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// Remove removes the named file or directory.
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// If there is an error, it will be of type *PathError.
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func Remove(name string) error {
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return os.Remove(fixpath(name))
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}
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// RemoveAll removes path and any children it contains.
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// It removes everything it can but returns the first error
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// it encounters. If the path does not exist, RemoveAll
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// returns nil (no error).
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func RemoveAll(path string) error {
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return os.RemoveAll(fixpath(path))
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}
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// Link creates newname as a hard link to oldname.
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// If there is an error, it will be of type *LinkError.
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func Link(oldname, newname string) error {
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return os.Link(fixpath(oldname), fixpath(newname))
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}
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// Lstat returns the FileInfo structure describing the named file.
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// If the file is a symbolic link, the returned FileInfo
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// describes the symbolic link. Lstat makes no attempt to follow the link.
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// If there is an error, it will be of type *PathError.
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func Lstat(name string) (os.FileInfo, error) {
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return os.Lstat(fixpath(name))
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}
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// OpenFile is the generalized open call; most users will use Open
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// or Create instead. It opens the named file with specified flag
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// (O_RDONLY etc.) and perm, (0666 etc.) if applicable. If successful,
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// methods on the returned File can be used for I/O.
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// If there is an error, it will be of type *PathError.
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func OpenFile(name string, flag int, perm os.FileMode) (*os.File, error) {
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return os.OpenFile(fixpath(name), flag, perm)
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}
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// IsAccessDenied checks if the error is due to permission error.
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func IsAccessDenied(err error) bool {
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return os.IsPermission(err)
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}
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// ResetPermissions resets the permissions of the file at the specified path
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func ResetPermissions(path string) error {
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// Set the default file permissions
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if err := os.Chmod(fixpath(path), 0600); err != nil {
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return err
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}
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return nil
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}
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// Readdirnames returns a list of file in a directory. Flags are passed to fs.OpenFile.
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// O_RDONLY and O_DIRECTORY are implied.
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func Readdirnames(filesystem FS, dir string, flags int) ([]string, error) {
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f, err := filesystem.OpenFile(dir, O_RDONLY|O_DIRECTORY|flags, false)
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if err != nil {
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return nil, fmt.Errorf("openfile for readdirnames failed: %w", err)
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}
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entries, err := f.Readdirnames(-1)
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if err != nil {
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_ = f.Close()
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return nil, fmt.Errorf("readdirnames %v failed: %w", dir, err)
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}
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err = f.Close()
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if err != nil {
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return nil, err
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}
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return entries, nil
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}
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