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108 lines
2.8 KiB
Go
108 lines
2.8 KiB
Go
//go:build linux
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// +build linux
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// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"encoding/hex"
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"strings"
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"unicode/utf8"
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"github.com/pkg/xattr"
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"github.com/rjeczalik/notify"
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)
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var (
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// EventTypePut contains the notify events that will cause a put (write)
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EventTypePut = []notify.Event{notify.InCloseWrite | notify.InMovedTo}
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// EventTypeDelete contains the notify events that will cause a delete (remove)
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EventTypeDelete = []notify.Event{notify.InDelete | notify.InDeleteSelf | notify.InMovedFrom}
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// EventTypeGet contains the notify events that will cause a get (read)
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EventTypeGet = []notify.Event{notify.InAccess | notify.InOpen}
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)
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// IsGetEvent checks if the event return is a get event.
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func IsGetEvent(event notify.Event) bool {
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for _, ev := range EventTypeGet {
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if event&ev != 0 {
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return true
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}
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}
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return false
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}
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// IsPutEvent checks if the event returned is a put event
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func IsPutEvent(event notify.Event) bool {
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for _, ev := range EventTypePut {
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if event&ev != 0 {
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return true
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}
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}
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return false
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}
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// IsDeleteEvent checks if the event returned is a delete event
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func IsDeleteEvent(event notify.Event) bool {
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for _, ev := range EventTypeDelete {
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if event&ev != 0 {
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return true
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}
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}
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return false
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}
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// getXAttr fetches the extended attribute for a particular key on file
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func getXAttr(path, key string) (string, error) {
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data, e := xattr.Get(path, key)
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if e != nil {
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return "", e
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}
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if utf8.ValidString(string(data)) {
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return string(data), nil
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}
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return hex.EncodeToString(data), nil
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}
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// getAllXattrs returns the extended attributes for a file if supported by the OS
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func getAllXattrs(path string) (map[string]string, error) {
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xMetadata := make(map[string]string)
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list, e := xattr.List(path)
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if e != nil {
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if isNotSupported(e) {
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return nil, nil
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}
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return nil, e
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}
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for _, key := range list {
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// filter out system specific xattr
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if strings.HasPrefix(key, "system.") {
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continue
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}
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xMetadata[key], e = getXAttr(path, key)
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if e != nil {
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if isNotSupported(e) {
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return nil, nil
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}
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return nil, e
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}
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}
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return xMetadata, nil
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}
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