stat.go

// -*- Mode: Go; indent-tabs-mode: t -*-

/*
 * Copyright (C) 2014-2015 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package osutil

import (
	"os"
)

// FileExists return true if given path can be stat()ed by us. Note that
// it may return false on e.g. permission issues.
func FileExists(path string) bool {
	_, err := os.Stat(path)
	return err == nil
}

// IsDirectory return true if the given path can be stat()ed by us and
// is a directory. Note that it may return false on e.g. permission issues.
func IsDirectory(path string) bool {
	fileInfo, err := os.Stat(path)
	if err != nil {
		return false
	}

	return fileInfo.IsDir()
}

// IsDevice checks if the given os.FileMode coresponds to a device (char/block)
func IsDevice(mode os.FileMode) bool {
	return (mode & (os.ModeDevice | os.ModeCharDevice)) != 0
}

// IsSymlink returns true if the given file is a symlink
func IsSymlink(path string) bool {
	fileInfo, err := os.Lstat(path)
	if err != nil {
		return false
	}

	return (fileInfo.Mode() & os.ModeSymlink) != 0
}