add dir lock

diff --git a/node/node.go b/node/node.go
index 4bef9bc..74952d1 100644 (file)
--- a/node/node.go
+++ b/node/node.go
@@ -2,6 +2,7 @@ package node
 
 import (
        "context"
+       "errors"
        "net/http"
        _ "net/http/pprof"
        "os"
@@ -9,6 +10,7 @@ import (
        "path/filepath"
        "time"
 
+       "github.com/prometheus/prometheus/util/flock"
        log "github.com/sirupsen/logrus"
        cmn "github.com/tendermint/tmlibs/common"
        dbm "github.com/tendermint/tmlibs/db"
@@ -61,6 +63,9 @@ type Node struct {
 
 func NewNode(config *cfg.Config) *Node {
        ctx := context.Background()
+       if err := lockDataDirectory(config); err != nil {
+               cmn.Exit("Error: " + err.Error())
+       }
        initLogFile(config)
        initActiveNetParams(config)
        // Get store
@@ -145,6 +150,15 @@ func NewNode(config *cfg.Config) *Node {
        return node
 }
 
+// Lock data directory after daemonization
+func lockDataDirectory(config *cfg.Config) error {
+       _, _, err := flock.New(filepath.Join(config.RootDir, "LOCK"))
+       if err != nil {
+               return errors.New("datadir already used by another process")
+       }
+       return nil
+}
+
 func initActiveNetParams(config *cfg.Config) {
        var exist bool
        consensus.ActiveNetParams, exist = consensus.NetParams[config.ChainID]

diff --git a/node/node_test.go b/node/node_test.go
new file mode 100644 (file)
index 0000000..a4d2c50
--- /dev/null
+++ b/node/node_test.go
@@ -0,0 +1,26 @@
+package node
+
+import (
+       "io/ioutil"
+       "os"
+       "testing"
+
+       cfg "github.com/bytom/config"
+)
+
+func TestNodeUsedDataDir(t *testing.T) {
+       dir, err := ioutil.TempDir("", "")
+       if err != nil {
+               t.Fatalf("failed to create temporary data directory: %v", err)
+       }
+       defer os.RemoveAll(dir)
+       var config cfg.Config
+       config.RootDir = dir
+       if err := lockDataDirectory(&config); err != nil {
+               t.Fatalf("Error: %v", err)
+       }
+
+       if err := lockDataDirectory(&config); err == nil {
+               t.Fatalf("duplicate datadir failure mismatch: want %v", err)
+       }
+}

diff --git a/vendor/github.com/prometheus/prometheus/LICENSE b/vendor/github.com/prometheus/prometheus/LICENSE
new file mode 100644 (file)
index 0000000..261eeb9
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

diff --git a/vendor/github.com/prometheus/prometheus/NOTICE b/vendor/github.com/prometheus/prometheus/NOTICE
new file mode 100644 (file)
index 0000000..47de241
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/NOTICE
@@ -0,0 +1,87 @@
+The Prometheus systems and service monitoring server
+Copyright 2012-2015 The Prometheus Authors
+
+This product includes software developed at
+SoundCloud Ltd. (http://soundcloud.com/).
+
+
+The following components are included in this product:
+
+Bootstrap
+http://getbootstrap.com
+Copyright 2011-2014 Twitter, Inc.
+Licensed under the MIT License
+
+bootstrap3-typeahead.js
+https://github.com/bassjobsen/Bootstrap-3-Typeahead
+Original written by @mdo and @fat
+Copyright 2014 Bass Jobsen @bassjobsen
+Licensed under the Apache License, Version 2.0
+
+fuzzy
+https://github.com/mattyork/fuzzy
+Original written by @mattyork
+Copyright 2012 Matt York
+Licensed under the MIT License
+
+bootstrap-datetimepicker.js
+https://github.com/Eonasdan/bootstrap-datetimepicker
+Copyright 2015 Jonathan Peterson (@Eonasdan)
+Licensed under the MIT License
+
+moment.js
+https://github.com/moment/moment/
+Copyright JS Foundation and other contributors
+Licensed under the MIT License
+
+Rickshaw
+https://github.com/shutterstock/rickshaw
+Copyright 2011-2014 by Shutterstock Images, LLC
+See https://github.com/shutterstock/rickshaw/blob/master/LICENSE for license details
+
+mustache.js
+https://github.com/janl/mustache.js
+Copyright 2009 Chris Wanstrath (Ruby)
+Copyright 2010-2014 Jan Lehnardt (JavaScript)
+Copyright 2010-2015 The mustache.js community
+Licensed under the MIT License
+
+jQuery
+https://jquery.org
+Copyright jQuery Foundation and other contributors
+Licensed under the MIT License
+
+Go support for Protocol Buffers - Google's data interchange format
+http://github.com/golang/protobuf/
+Copyright 2010 The Go Authors
+See source code for license details.
+
+Go support for leveled logs, analogous to
+https://code.google.com/p/google-glog/
+Copyright 2013 Google Inc.
+Licensed under the Apache License, Version 2.0
+
+Support for streaming Protocol Buffer messages for the Go language (golang).
+https://github.com/matttproud/golang_protobuf_extensions
+Copyright 2013 Matt T. Proud
+Licensed under the Apache License, Version 2.0
+
+DNS library in Go
+http://miek.nl/posts/2014/Aug/16/go-dns-package/
+Copyright 2009 The Go Authors, 2011 Miek Gieben
+See https://github.com/miekg/dns/blob/master/LICENSE for license details.
+
+LevelDB key/value database in Go
+https://github.com/syndtr/goleveldb
+Copyright 2012 Suryandaru Triandana
+See https://github.com/syndtr/goleveldb/blob/master/LICENSE for license details.
+
+gosnappy - a fork of code.google.com/p/snappy-go
+https://github.com/syndtr/gosnappy
+Copyright 2011 The Snappy-Go Authors
+See https://github.com/syndtr/gosnappy/blob/master/LICENSE for license details.
+
+go-zookeeper - Native ZooKeeper client for Go
+https://github.com/samuel/go-zookeeper
+Copyright (c) 2013, Samuel Stauffer <samuel@descolada.com>
+See https://github.com/samuel/go-zookeeper/blob/master/LICENSE for license details.

diff --git a/vendor/github.com/prometheus/prometheus/util/flock/flock.go b/vendor/github.com/prometheus/prometheus/util/flock/flock.go
new file mode 100644 (file)
index 0000000..5dc22a2
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/util/flock/flock.go
@@ -0,0 +1,46 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package flock provides portable file locking. It is essentially ripped out
+// from the code of github.com/syndtr/goleveldb. Strange enough that the
+// standard library does not provide this functionality. Once this package has
+// proven to work as expected, we should probably turn it into a separate
+// general purpose package for humanity.
+package flock
+
+import (
+       "os"
+       "path/filepath"
+)
+
+// Releaser provides the Release method to release a file lock.
+type Releaser interface {
+       Release() error
+}
+
+// New locks the file with the provided name. If the file does not exist, it is
+// created. The returned Releaser is used to release the lock. existed is true
+// if the file to lock already existed. A non-nil error is returned if the
+// locking has failed. Neither this function nor the returned Releaser is
+// goroutine-safe.
+func New(fileName string) (r Releaser, existed bool, err error) {
+       if err = os.MkdirAll(filepath.Dir(fileName), 0755); err != nil {
+               return
+       }
+
+       _, err = os.Stat(fileName)
+       existed = err == nil
+
+       r, err = newLock(fileName)
+       return
+}

diff --git a/vendor/github.com/prometheus/prometheus/util/flock/flock_plan9.go b/vendor/github.com/prometheus/prometheus/util/flock/flock_plan9.go
new file mode 100644 (file)
index 0000000..004e85c
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/util/flock/flock_plan9.go
@@ -0,0 +1,32 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package flock
+
+import "os"
+
+type plan9Lock struct {
+       f *os.File
+}
+
+func (l *plan9Lock) Release() error {
+       return l.f.Close()
+}
+
+func newLock(fileName string) (Releaser, error) {
+       f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE, os.ModeExclusive|0644)
+       if err != nil {
+               return nil, err
+       }
+       return &plan9Lock{f}, nil
+}

diff --git a/vendor/github.com/prometheus/prometheus/util/flock/flock_solaris.go b/vendor/github.com/prometheus/prometheus/util/flock/flock_solaris.go
new file mode 100644 (file)
index 0000000..299fc87
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/util/flock/flock_solaris.go
@@ -0,0 +1,59 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build solaris
+
+package flock
+
+import (
+       "os"
+       "syscall"
+)
+
+type unixLock struct {
+       f *os.File
+}
+
+func (l *unixLock) Release() error {
+       if err := l.set(false); err != nil {
+               return err
+       }
+       return l.f.Close()
+}
+
+func (l *unixLock) set(lock bool) error {
+       flock := syscall.Flock_t{
+               Type:   syscall.F_UNLCK,
+               Start:  0,
+               Len:    0,
+               Whence: 1,
+       }
+       if lock {
+               flock.Type = syscall.F_WRLCK
+       }
+       return syscall.FcntlFlock(l.f.Fd(), syscall.F_SETLK, &flock)
+}
+
+func newLock(fileName string) (Releaser, error) {
+       f, err := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE, 0644)
+       if err != nil {
+               return nil, err
+       }
+       l := &unixLock{f}
+       err = l.set(true)
+       if err != nil {
+               f.Close()
+               return nil, err
+       }
+       return l, nil
+}

diff --git a/vendor/github.com/prometheus/prometheus/util/flock/flock_unix.go b/vendor/github.com/prometheus/prometheus/util/flock/flock_unix.go
new file mode 100644 (file)
index 0000000..7d71f8f
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/util/flock/flock_unix.go
@@ -0,0 +1,54 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package flock
+
+import (
+       "os"
+       "syscall"
+)
+
+type unixLock struct {
+       f *os.File
+}
+
+func (l *unixLock) Release() error {
+       if err := l.set(false); err != nil {
+               return err
+       }
+       return l.f.Close()
+}
+
+func (l *unixLock) set(lock bool) error {
+       how := syscall.LOCK_UN
+       if lock {
+               how = syscall.LOCK_EX
+       }
+       return syscall.Flock(int(l.f.Fd()), how|syscall.LOCK_NB)
+}
+
+func newLock(fileName string) (Releaser, error) {
+       f, err := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE, 0644)
+       if err != nil {
+               return nil, err
+       }
+       l := &unixLock{f}
+       err = l.set(true)
+       if err != nil {
+               f.Close()
+               return nil, err
+       }
+       return l, nil
+}

diff --git a/vendor/github.com/prometheus/prometheus/util/flock/flock_windows.go b/vendor/github.com/prometheus/prometheus/util/flock/flock_windows.go
new file mode 100644 (file)
index 0000000..bf7266f
--- /dev/null
+++ b/vendor/github.com/prometheus/prometheus/util/flock/flock_windows.go
@@ -0,0 +1,36 @@
+// Copyright 2016 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package flock
+
+import "syscall"
+
+type windowsLock struct {
+       fd syscall.Handle
+}
+
+func (fl *windowsLock) Release() error {
+       return syscall.Close(fl.fd)
+}
+
+func newLock(fileName string) (Releaser, error) {
+       pathp, err := syscall.UTF16PtrFromString(fileName)
+       if err != nil {
+               return nil, err
+       }
+       fd, err := syscall.CreateFile(pathp, syscall.GENERIC_READ|syscall.GENERIC_WRITE, 0, nil, syscall.CREATE_ALWAYS, syscall.FILE_ATTRIBUTE_NORMAL, 0)
+       if err != nil {
+               return nil, err
+       }
+       return &windowsLock{fd}, nil
+}