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 {-rx|-tx}\n", os.Args[0])
  43         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE -pkt PKT\n", os.Args[0])
  44         fmt.Fprintln(os.Stderr, "-older option's time units are: (s)econds, (m)inutes, (h)ours, (d)ays")
  45         fmt.Fprintln(os.Stderr, "Options:")
  46         flag.PrintDefaults()
  47 }
  48
  49 func main() {
  50         var (
  51                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  52                 doTmp     = flag.Bool("tmp", false, "Remove all temporary files")
  53                 doLock    = flag.Bool("lock", false, "Remove all lock files")
  54                 nodeRaw   = flag.String("node", "", "Node to remove files in")
  55                 doRx      = flag.Bool("rx", false, "Process received packets")
  56                 doTx      = flag.Bool("tx", false, "Process transfered packets")
  57                 doPart    = flag.Bool("part", false, "Remove only .part files")
  58                 doSeen    = flag.Bool("seen", false, "Remove only .seen files")
  59                 older     = flag.String("older", "", "XXX{smhd}: only older than XXX number of time units")
  60                 dryRun    = flag.Bool("dryrun", false, "Do not actually remove files")
  61                 pktRaw    = flag.String("pkt", "", "Packet to remove")
  62                 spoolPath = flag.String("spool", "", "Override path to spool")
  63                 quiet     = flag.Bool("quiet", false, "Print only errors")
  64                 debug     = flag.Bool("debug", false, "Print debug messages")
  65                 version   = flag.Bool("version", false, "Print version information")
  66                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  67         )
  68         flag.Usage = usage
  69         flag.Parse()
  70         if *warranty {
  71                 fmt.Println(nncp.Warranty)
  72                 return
  73         }
  74         if *version {
  75                 fmt.Println(nncp.VersionGet())
  76                 return
  77         }
  78
  79         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, "", *quiet, false, false, *debug)
  80         if err != nil {
  81                 log.Fatalln("Error during initialization:", err)
  82         }
  83         ctx.Umask()
  84
  85         var oldBoundaryRaw int
  86         if *older != "" {
  87                 olderRe := regexp.MustCompile(`^(\d+)([smhd])$`)
  88                 matches := olderRe.FindStringSubmatch(*older)
  89                 if len(matches) != 1+2 {
  90                         log.Fatalln("can not parse -older")
  91                 }
  92                 oldBoundaryRaw, err = strconv.Atoi(matches[1])
  93                 if err != nil {
  94                         log.Fatalln("can not parse -older:", err)
  95                 }
  96                 switch matches[2] {
  97                 case "s":
  98                         break
  99                 case "m":
 100                         oldBoundaryRaw *= 60
 101                 case "h":
 102                         oldBoundaryRaw *= 60 * 60
 103                 case "d":
 104                         oldBoundaryRaw *= 60 * 60 * 24
 105                 }
 106         }
 107         oldBoundary := time.Second * time.Duration(oldBoundaryRaw)
 108
 109         now := time.Now()
 110         if *doTmp {
 111                 err = filepath.Walk(
 112                         filepath.Join(ctx.Spool, "tmp"),
 113                         func(path string, info os.FileInfo, err error) error {
 114                                 if err != nil {
 115                                         return err
 116                                 }
 117                                 if info.IsDir() {
 118                                         return nil
 119                                 }
 120                                 if now.Sub(info.ModTime()) < oldBoundary {
 121                                         ctx.LogD("nncp-rm", nncp.SDS{"file": path}, "too fresh, skipping")
 122                                         return nil
 123                                 }
 124                                 ctx.LogI("nncp-rm", nncp.SDS{"file": path}, "")
 125                                 if *dryRun {
 126                                         return nil
 127                                 }
 128                                 return os.Remove(path)
 129                         })
 130                 if err != nil {
 131                         log.Fatalln("Error during walking:", err)
 132                 }
 133                 return
 134         }
 135         if *doLock {
 136                 err = filepath.Walk(ctx.Spool, func(path string, info os.FileInfo, err error) error {
 137                         if err != nil {
 138                                 return err
 139                         }
 140                         if info.IsDir() {
 141                                 return nil
 142                         }
 143                         if strings.HasSuffix(info.Name(), ".lock") {
 144                                 ctx.LogI("nncp-rm", nncp.SDS{"file": path}, "")
 145                                 if *dryRun {
 146                                         return nil
 147                                 }
 148                                 return os.Remove(path)
 149                         }
 150                         return nil
 151                 })
 152                 if err != nil {
 153                         log.Fatalln("Error during walking:", err)
 154                 }
 155                 return
 156         }
 157         if *nodeRaw == "" {
 158                 usage()
 159                 os.Exit(1)
 160         }
 161         node, err := ctx.FindNode(*nodeRaw)
 162         if err != nil {
 163                 log.Fatalln("Invalid -node specified:", err)
 164         }
 165         remove := func(xx nncp.TRxTx) error {
 166                 return filepath.Walk(
 167                         filepath.Join(ctx.Spool, node.Id.String(), string(xx)),
 168                         func(path string, info os.FileInfo, err error) error {
 169                                 if err != nil {
 170                                         return err
 171                                 }
 172                                 if info.IsDir() {
 173                                         return nil
 174                                 }
 175                                 if now.Sub(info.ModTime()) < oldBoundary {
 176                                         ctx.LogD("nncp-rm", nncp.SDS{"file": path}, "too fresh, skipping")
 177                                         return nil
 178                                 }
 179                                 if *doSeen && strings.HasSuffix(info.Name(), nncp.SeenSuffix) {
 180                                         ctx.LogI("nncp-rm", nncp.SDS{"file": path}, "")
 181                                         if *dryRun {
 182                                                 return nil
 183                                         }
 184                                         return os.Remove(path)
 185                                 }
 186                                 if *doPart && strings.HasSuffix(info.Name(), nncp.PartSuffix) {
 187                                         ctx.LogI("nncp-rm", nncp.SDS{"file": path}, "")
 188                                         if *dryRun {
 189                                                 return nil
 190                                         }
 191                                         return os.Remove(path)
 192                                 }
 193                                 if *pktRaw != "" && filepath.Base(info.Name()) == *pktRaw {
 194                                         ctx.LogI("nncp-rm", nncp.SDS{"file": path}, "")
 195                                         if *dryRun {
 196                                                 return nil
 197                                         }
 198                                         return os.Remove(path)
 199                                 }
 200                                 if !*doSeen &&
 201                                         !*doPart &&
 202                                         (*doRx || *doTx) &&
 203                                         ((*doRx && xx == nncp.TRx) || (*doTx && xx == nncp.TTx)) {
 204                                         ctx.LogI("nncp-rm", nncp.SDS{"file": path}, "")
 205                                         if *dryRun {
 206                                                 return nil
 207                                         }
 208                                         return os.Remove(path)
 209                                 }
 210                                 return nil
 211                         })
 212         }
 213         if *pktRaw != "" || *doRx || *doSeen || *doPart {
 214                 if err = remove(nncp.TRx); err != nil {
 215                         log.Fatalln("Can not remove:", err)
 216                 }
 217         }
 218         if *pktRaw != "" || *doTx {
 219                 if err = remove(nncp.TTx); err != nil {
 220                         log.Fatalln("Can not remove:", err)
 221                 }
 222         }
 223 }