1 files changed, 133 insertions, 0 deletions
diff --git a/fs/os.go b/fs/os.go
new file mode 100644
index 0000000..f251c66
--- /dev/null
+++ b/fs/os.go
@@ -0,0 +1,133 @@
+package fs
+
+import (
+	"io"
+	"os"
+	"time"
+)
+
+func openOSFile(path string) (osFile, error) {
+	fi, err := os.Lstat(path)
+	if err != nil {
+		return osFile{}, err
+	}
+
+	return osFile{
+		fullpath: path,
+		fi:       fi,
+	}, nil
+}
+
+type osFile struct {
+	fullpath string
+	fi       os.FileInfo
+}
+
+func (f osFile) Type() FileType {
+	m := f.fi.Mode()
+	if m.IsDir() {
+		return FDir
+	}
+	if m.IsRegular() {
+		return FFile
+	}
+	if m&os.ModeSymlink != 0 {
+		return FSymlink
+	}
+	return "unknown"
+}
+
+func (f osFile) Name() string {
+	return f.fi.Name()
+}
+
+func (f osFile) Executable() bool {
+	return f.fi.Mode()&0100 != 0 // x bit set for user?
+}
+
+func (f osFile) ModTime() time.Time {
+	return f.fi.ModTime()
+}
+
+func (f osFile) Delete() error {
+	return os.RemoveAll(f.fullpath)
+}
+
+func (f osFile) Open() (io.ReadWriteCloser, error) {
+	fh, err := os.Open(f.fullpath)
+	if err != nil {
+		return nil, err
+	}
+	return fh, nil
+}
+
+func (f osFile) Readdir() (list []File, err error) {
+	fh, err := os.Open(f.fullpath)
+	if err != nil {
+		return
+	}
+	defer fh.Close()
+
+	infos, err := fh.Readdir(-1)
+	if err != nil {
+		return
+	}
+
+	for _, fi := range infos {
+		if fi.Name() == "." || fi.Name() == ".." {
+			continue
+		}
+
+		list = append(list, osFile{
+			fullpath: f.fullpath + string(os.PathSeparator) + fi.Name(),
+			fi:       fi,
+		})
+	}
+
+	return
+}
+
+func perms(executable bool) os.FileMode {
+	if executable {
+		return 0755
+	} else {
+		return 0644
+	}
+}
+
+func (f osFile) CreateChildFile(name string, exec bool) (RegularFile, error) {
+	p := f.fullpath + string(os.PathSeparator) + name
+
+	fh, err := os.OpenFile(p, os.O_RDWR|os.O_CREATE, perms(exec))
+	if err != nil {
+		return nil, err
+	}
+	fh.Close()
+
+	return openOSFile(p)
+}
+
+func (f osFile) CreateChildDir(name string) (Dir, error) {
+	p := f.fullpath + string(os.PathSeparator) + name
+
+	if err := os.Mkdir(p, perms(true)); err != nil {
+		return nil, err
+	}
+
+	return openOSFile(p)
+}
+
+func (f osFile) CreateChildSymlink(name string, target string) (Symlink, error) {
+	p := f.fullpath + string(os.PathSeparator) + name
+
+	err := os.Symlink(target, p)
+	if err != nil {
+		return nil, err
+	}
+
+	return openOSFile(p)
+}
+
+func (f osFile) Readlink() (string, error) {
+	return os.Readlink(f.fullpath)
+}