src/cmd/nncp-rm/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2021 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, version 3 of the License.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 // Remove packet from the queue.
  19 package main
  20
  21 import (
  22         "flag"
  23         "fmt"
  24         "log"
  25         "os"
  26         "path/filepath"
  27         "regexp"
  28         "strconv"
  29         "strings"
  30         "time"
  31
  32         "go.cypherpunks.ru/nncp/v5"
  33 )
  34
  35 func usage() {
  36         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  37         fmt.Fprintf(os.Stderr, "nncp-rm -- remove packet\n\n")
  38         fmt.Fprintf(os.Stderr, "Usage: %s [options] -tmp\n", os.Args[0])
  39         fmt.Fprintf(os.Stderr, "       %s [options] -lock\n", os.Args[0])
  40         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE -part\n", os.Args[0])
  41         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE -seen\n", os.Args[0])
  42         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE -nock\n", os.Args[0])
  43         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE {-rx|-tx}\n", os.Args[0])
  44         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE -pkt PKT\n", os.Args[0])
  45         fmt.Fprintln(os.Stderr, "-older option's time units are: (s)econds, (m)inutes, (h)ours, (d)ays")
  46         fmt.Fprintln(os.Stderr, "Options:")
  47         flag.PrintDefaults()
  48 }
  49
  50 func main() {
  51         var (
  52                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  53                 doTmp     = flag.Bool("tmp", false, "Remove all temporary files")
  54                 doLock    = flag.Bool("lock", false, "Remove all lock files")
  55                 nodeRaw   = flag.String("node", "", "Node to remove files in")
  56                 doRx      = flag.Bool("rx", false, "Process received packets")
  57                 doTx      = flag.Bool("tx", false, "Process transfered packets")
  58                 doPart    = flag.Bool("part", false, "Remove only .part files")
  59                 doSeen    = flag.Bool("seen", false, "Remove only .seen files")
  60                 doNoCK    = flag.Bool("nock", false, "Remove only .nock files")
  61                 older     = flag.String("older", "", "XXX{smhd}: only older than XXX number of time units")
  62                 dryRun    = flag.Bool("dryrun", false, "Do not actually remove files")
  63                 pktRaw    = flag.String("pkt", "", "Packet to remove")
  64                 spoolPath = flag.String("spool", "", "Override path to spool")
  65                 quiet     = flag.Bool("quiet", false, "Print only errors")
  66                 debug     = flag.Bool("debug", false, "Print debug messages")
  67                 version   = flag.Bool("version", false, "Print version information")
  68                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  69         )
  70         flag.Usage = usage
  71         flag.Parse()
  72         if *warranty {
  73                 fmt.Println(nncp.Warranty)
  74                 return
  75         }
  76         if *version {
  77                 fmt.Println(nncp.VersionGet())
  78                 return
  79         }
  80
  81         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, "", *quiet, false, false, *debug)
  82         if err != nil {
  83                 log.Fatalln("Error during initialization:", err)
  84         }
  85         ctx.Umask()
  86
  87         var oldBoundaryRaw int
  88         if *older != "" {
  89                 olderRe := regexp.MustCompile(`^(\d+)([smhd])$`)
  90                 matches := olderRe.FindStringSubmatch(*older)
  91                 if len(matches) != 1+2 {
  92                         log.Fatalln("can not parse -older")
  93                 }
  94                 oldBoundaryRaw, err = strconv.Atoi(matches[1])
  95                 if err != nil {
  96                         log.Fatalln("can not parse -older:", err)
  97                 }
  98                 switch matches[2] {
  99                 case "s":
 100                         break
 101                 case "m":
 102                         oldBoundaryRaw *= 60
 103                 case "h":
 104                         oldBoundaryRaw *= 60 * 60
 105                 case "d":
 106                         oldBoundaryRaw *= 60 * 60 * 24
 107                 }
 108         }
 109         oldBoundary := time.Second * time.Duration(oldBoundaryRaw)
 110
 111         now := time.Now()
 112         if *doTmp {
 113                 err = filepath.Walk(
 114                         filepath.Join(ctx.Spool, "tmp"),
 115                         func(path string, info os.FileInfo, err error) error {
 116                                 if err != nil {
 117                                         return err
 118                                 }
 119                                 if info.IsDir() {
 120                                         return nil
 121                                 }
 122                                 if now.Sub(info.ModTime()) < oldBoundary {
 123                                         ctx.LogD("nncp-rm", nncp.LEs{{K: "File", V: path}}, "too fresh, skipping")
 124                                         return nil
 125                                 }
 126                                 ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 127                                 if *dryRun {
 128                                         return nil
 129                                 }
 130                                 return os.Remove(path)
 131                         })
 132                 if err != nil {
 133                         log.Fatalln("Error during walking:", err)
 134                 }
 135                 return
 136         }
 137         if *doLock {
 138                 err = filepath.Walk(ctx.Spool, func(path string, info os.FileInfo, err error) error {
 139                         if err != nil {
 140                                 return err
 141                         }
 142                         if info.IsDir() {
 143                                 return nil
 144                         }
 145                         if strings.HasSuffix(info.Name(), ".lock") {
 146                                 ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 147                                 if *dryRun {
 148                                         return nil
 149                                 }
 150                                 return os.Remove(path)
 151                         }
 152                         return nil
 153                 })
 154                 if err != nil {
 155                         log.Fatalln("Error during walking:", err)
 156                 }
 157                 return
 158         }
 159         if *nodeRaw == "" {
 160                 usage()
 161                 os.Exit(1)
 162         }
 163         node, err := ctx.FindNode(*nodeRaw)
 164         if err != nil {
 165                 log.Fatalln("Invalid -node specified:", err)
 166         }
 167         remove := func(xx nncp.TRxTx) error {
 168                 return filepath.Walk(
 169                         filepath.Join(ctx.Spool, node.Id.String(), string(xx)),
 170                         func(path string, info os.FileInfo, err error) error {
 171                                 if err != nil {
 172                                         return err
 173                                 }
 174                                 if info.IsDir() {
 175                                         return nil
 176                                 }
 177                                 if now.Sub(info.ModTime()) < oldBoundary {
 178                                         ctx.LogD("nncp-rm", nncp.LEs{{K: "File", V: path}}, "too fresh, skipping")
 179                                         return nil
 180                                 }
 181                                 if *doSeen && strings.HasSuffix(info.Name(), nncp.SeenSuffix) {
 182                                         ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 183                                         if *dryRun {
 184                                                 return nil
 185                                         }
 186                                         return os.Remove(path)
 187                                 }
 188                                 if *doNoCK && strings.HasSuffix(info.Name(), nncp.NoCKSuffix) {
 189                                         ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 190                                         if *dryRun {
 191                                                 return nil
 192                                         }
 193                                         return os.Remove(path)
 194                                 }
 195                                 if *doPart && strings.HasSuffix(info.Name(), nncp.PartSuffix) {
 196                                         ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 197                                         if *dryRun {
 198                                                 return nil
 199                                         }
 200                                         return os.Remove(path)
 201                                 }
 202                                 if *pktRaw != "" && filepath.Base(info.Name()) == *pktRaw {
 203                                         ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 204                                         if *dryRun {
 205                                                 return nil
 206                                         }
 207                                         return os.Remove(path)
 208                                 }
 209                                 if !*doSeen &&
 210                                         !*doNoCK &&
 211                                         !*doPart &&
 212                                         (*doRx || *doTx) &&
 213                                         ((*doRx && xx == nncp.TRx) || (*doTx && xx == nncp.TTx)) {
 214                                         ctx.LogI("nncp-rm", nncp.LEs{{K: "File", V: path}}, "")
 215                                         if *dryRun {
 216                                                 return nil
 217                                         }
 218                                         return os.Remove(path)
 219                                 }
 220                                 return nil
 221                         })
 222         }
 223         if *pktRaw != "" || *doRx || *doSeen || *doNoCK || *doPart {
 224                 if err = remove(nncp.TRx); err != nil {
 225                         log.Fatalln("Can not remove:", err)
 226                 }
 227         }
 228         if *pktRaw != "" || *doTx {
 229                 if err = remove(nncp.TTx); err != nil {
 230                         log.Fatalln("Can not remove:", err)
 231                 }
 232         }
 233 }