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/v6"
  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 -hdr\n", os.Args[0])
  44         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE {-rx|-tx}\n", os.Args[0])
  45         fmt.Fprintf(os.Stderr, "       %s [options] -node NODE -pkt PKT\n", os.Args[0])
  46         fmt.Fprintln(os.Stderr, "-older option's time units are: (s)econds, (m)inutes, (h)ours, (d)ays")
  47         fmt.Fprintln(os.Stderr, "Options:")
  48         flag.PrintDefaults()
  49 }
  50
  51 func main() {
  52         var (
  53                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  54                 doTmp     = flag.Bool("tmp", false, "Remove all temporary files")
  55                 doHdr     = flag.Bool("hdr", false, "Remove all .hdr files")
  56                 doLock    = flag.Bool("lock", false, "Remove all lock files")
  57                 nodeRaw   = flag.String("node", "", "Node to remove files in")
  58                 doRx      = flag.Bool("rx", false, "Process received packets")
  59                 doTx      = flag.Bool("tx", false, "Process transfered packets")
  60                 doPart    = flag.Bool("part", false, "Remove only .part files")
  61                 doSeen    = flag.Bool("seen", false, "Remove only .seen files")
  62                 doNoCK    = flag.Bool("nock", false, "Remove only .nock files")
  63                 older     = flag.String("older", "", "XXX{smhd}: only older than XXX number of time units")
  64                 dryRun    = flag.Bool("dryrun", false, "Do not actually remove files")
  65                 pktRaw    = flag.String("pkt", "", "Packet to remove")
  66                 spoolPath = flag.String("spool", "", "Override path to spool")
  67                 quiet     = flag.Bool("quiet", false, "Print only errors")
  68                 debug     = flag.Bool("debug", false, "Print debug messages")
  69                 version   = flag.Bool("version", false, "Print version information")
  70                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  71         )
  72         flag.Usage = usage
  73         flag.Parse()
  74         if *warranty {
  75                 fmt.Println(nncp.Warranty)
  76                 return
  77         }
  78         if *version {
  79                 fmt.Println(nncp.VersionGet())
  80                 return
  81         }
  82
  83         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, "", *quiet, false, false, *debug)
  84         if err != nil {
  85                 log.Fatalln("Error during initialization:", err)
  86         }
  87         ctx.Umask()
  88
  89         var oldBoundaryRaw int
  90         if *older != "" {
  91                 olderRe := regexp.MustCompile(`^(\d+)([smhd])$`)
  92                 matches := olderRe.FindStringSubmatch(*older)
  93                 if len(matches) != 1+2 {
  94                         log.Fatalln("can not parse -older")
  95                 }
  96                 oldBoundaryRaw, err = strconv.Atoi(matches[1])
  97                 if err != nil {
  98                         log.Fatalln("can not parse -older:", err)
  99                 }
 100                 switch matches[2] {
 101                 case "s":
 102                         break
 103                 case "m":
 104                         oldBoundaryRaw *= 60
 105                 case "h":
 106                         oldBoundaryRaw *= 60 * 60
 107                 case "d":
 108                         oldBoundaryRaw *= 60 * 60 * 24
 109                 }
 110         }
 111         oldBoundary := time.Second * time.Duration(oldBoundaryRaw)
 112
 113         now := time.Now()
 114         if *doTmp {
 115                 err = filepath.Walk(
 116                         filepath.Join(ctx.Spool, "tmp"),
 117                         func(path string, info os.FileInfo, err error) error {
 118                                 if err != nil {
 119                                         return err
 120                                 }
 121                                 if info.IsDir() {
 122                                         return nil
 123                                 }
 124                                 if now.Sub(info.ModTime()) < oldBoundary {
 125                                         ctx.LogD("rm-skip", nncp.LEs{{K: "File", V: path}}, func(les nncp.LEs) string {
 126                                                 return fmt.Sprintf("File %s: too fresh, skipping", path)
 127                                         })
 128                                         return nil
 129                                 }
 130                                 ctx.LogI("rm", nncp.LEs{{K: "File", V: path}}, func(les nncp.LEs) string {
 131                                         return fmt.Sprintf("File %s: removed", path)
 132                                 })
 133                                 if *dryRun {
 134                                         return nil
 135                                 }
 136                                 return os.Remove(path)
 137                         })
 138                 if err != nil {
 139                         log.Fatalln("Error during walking:", err)
 140                 }
 141                 return
 142         }
 143         if *doLock {
 144                 err = filepath.Walk(ctx.Spool, func(path string, info os.FileInfo, err error) error {
 145                         if err != nil {
 146                                 return err
 147                         }
 148                         if info.IsDir() {
 149                                 return nil
 150                         }
 151                         if strings.HasSuffix(info.Name(), ".lock") {
 152                                 ctx.LogI("rm", nncp.LEs{{K: "File", V: path}}, func(les nncp.LEs) string {
 153                                         return fmt.Sprintf("File %s: removed", path)
 154                                 })
 155                                 if *dryRun {
 156                                         return nil
 157                                 }
 158                                 return os.Remove(path)
 159                         }
 160                         return nil
 161                 })
 162                 if err != nil {
 163                         log.Fatalln("Error during walking:", err)
 164                 }
 165                 return
 166         }
 167         if *nodeRaw == "" {
 168                 usage()
 169                 os.Exit(1)
 170         }
 171         node, err := ctx.FindNode(*nodeRaw)
 172         if err != nil {
 173                 log.Fatalln("Invalid -node specified:", err)
 174         }
 175         remove := func(xx nncp.TRxTx) error {
 176                 return filepath.Walk(
 177                         filepath.Join(ctx.Spool, node.Id.String(), string(xx)),
 178                         func(path string, info os.FileInfo, err error) error {
 179                                 if err != nil {
 180                                         return err
 181                                 }
 182                                 if info.IsDir() {
 183                                         return nil
 184                                 }
 185                                 logMsg := func(les nncp.LEs) string {
 186                                         return fmt.Sprintf("File %s: removed", path)
 187                                 }
 188                                 if now.Sub(info.ModTime()) < oldBoundary {
 189                                         ctx.LogD("rm-skip", nncp.LEs{{K: "File", V: path}}, func(les nncp.LEs) string {
 190                                                 return fmt.Sprintf("File %s: too fresh, skipping", path)
 191                                         })
 192                                         return nil
 193                                 }
 194                                 if (*doSeen && strings.HasSuffix(info.Name(), nncp.SeenSuffix)) ||
 195                                         (*doNoCK && strings.HasSuffix(info.Name(), nncp.NoCKSuffix)) ||
 196                                         (*doHdr && strings.HasSuffix(info.Name(), nncp.HdrSuffix)) ||
 197                                         (*doPart && strings.HasSuffix(info.Name(), nncp.PartSuffix)) {
 198                                         ctx.LogI("rm", nncp.LEs{{K: "File", V: path}}, logMsg)
 199                                         if *dryRun {
 200                                                 return nil
 201                                         }
 202                                         return os.Remove(path)
 203                                 }
 204                                 if *pktRaw != "" && filepath.Base(info.Name()) == *pktRaw {
 205                                         ctx.LogI("rm", nncp.LEs{{K: "File", V: path}}, logMsg)
 206                                         if *dryRun {
 207                                                 return nil
 208                                         }
 209                                         return os.Remove(path)
 210                                 }
 211                                 if !*doSeen && !*doNoCK && !*doHdr && !*doPart &&
 212                                         (*doRx || *doTx) &&
 213                                         ((*doRx && xx == nncp.TRx) || (*doTx && xx == nncp.TTx)) {
 214                                         ctx.LogI("rm", nncp.LEs{{K: "File", V: path}}, logMsg)
 215                                         if *dryRun {
 216                                                 return nil
 217                                         }
 218                                         return os.Remove(path)
 219                                 }
 220                                 return nil
 221                         })
 222         }
 223         if *pktRaw != "" || *doRx || *doSeen || *doNoCK || *doHdr || *doPart {
 224                 if err = remove(nncp.TRx); err != nil {
 225                         log.Fatalln("Can not remove:", err)
 226                 }
 227         }
 228         if *pktRaw != "" || *doTx || *doHdr {
 229                 if err = remove(nncp.TTx); err != nil {
 230                         log.Fatalln("Can not remove:", err)
 231                 }
 232         }
 233 }