src/cmd/nncp-exec/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2023 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 // Send execution command via NNCP.
  19 package main
  20
  21 import (
  22         "bufio"
  23         "flag"
  24         "fmt"
  25         "log"
  26         "os"
  27         "strings"
  28
  29         "go.cypherpunks.ru/nncp/v8"
  30 )
  31
  32 func usage() {
  33         fmt.Fprint(os.Stderr, "nncp-exec -- send execution command\n\n")
  34         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE HANDLE [ARG0 ARG1 ...]\n", os.Args[0])
  35         fmt.Fprintf(os.Stderr, "       %s [options] %s:AREA HANDLE [ARG0 ARG1 ...]\nOptions:\n",
  36                 os.Args[0], nncp.AreaDir)
  37         flag.PrintDefaults()
  38 }
  39
  40 func main() {
  41         var (
  42                 noCompress   = flag.Bool("nocompress", false, "Do not compress input data")
  43                 cfgPath      = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  44                 niceRaw      = flag.String("nice", nncp.NicenessFmt(nncp.DefaultNiceExec), "Outbound packet niceness")
  45                 replyNiceRaw = flag.String("replynice", nncp.NicenessFmt(nncp.DefaultNiceFile), "Possible reply packet niceness")
  46                 minSize      = flag.Uint64("minsize", 0, "Minimal required resulting packet size, in KiB")
  47                 argMaxSize   = flag.Uint64("maxsize", 0, "Maximal allowable resulting packet size, in KiB")
  48                 viaOverride  = flag.String("via", "", "Override Via path to destination node")
  49                 spoolPath    = flag.String("spool", "", "Override path to spool")
  50                 logPath      = flag.String("log", "", "Override path to logfile")
  51                 quiet        = flag.Bool("quiet", false, "Print only errors")
  52                 showPrgrs    = flag.Bool("progress", false, "Force progress showing")
  53                 omitPrgrs    = flag.Bool("noprogress", false, "Omit progress showing")
  54                 debug        = flag.Bool("debug", false, "Print debug messages")
  55                 version      = flag.Bool("version", false, "Print version information")
  56                 warranty     = flag.Bool("warranty", false, "Print warranty information")
  57         )
  58         log.SetFlags(log.Lshortfile)
  59         flag.Usage = usage
  60         flag.Parse()
  61         if *warranty {
  62                 fmt.Println(nncp.Warranty)
  63                 return
  64         }
  65         if *version {
  66                 fmt.Println(nncp.VersionGet())
  67                 return
  68         }
  69         if flag.NArg() < 2 {
  70                 usage()
  71                 os.Exit(1)
  72         }
  73         nice, err := nncp.NicenessParse(*niceRaw)
  74         if err != nil {
  75                 log.Fatalln(err)
  76         }
  77         replyNice, err := nncp.NicenessParse(*replyNiceRaw)
  78         if err != nil {
  79                 log.Fatalln(err)
  80         }
  81
  82         ctx, err := nncp.CtxFromCmdline(
  83                 *cfgPath,
  84                 *spoolPath,
  85                 *logPath,
  86                 *quiet,
  87                 *showPrgrs,
  88                 *omitPrgrs,
  89                 *debug,
  90         )
  91         if err != nil {
  92                 log.Fatalln("Error during initialization:", err)
  93         }
  94         if ctx.Self == nil {
  95                 log.Fatalln("Config lacks private keys")
  96         }
  97
  98         var areaId *nncp.AreaId
  99         var node *nncp.Node
 100         if strings.HasPrefix(flag.Arg(0), nncp.AreaDir+":") {
 101                 areaId = ctx.AreaName2Id[flag.Arg(0)[len(nncp.AreaDir)+1:]]
 102                 if areaId == nil {
 103                         log.Fatalln("Unknown area specified")
 104                 }
 105                 node = ctx.Neigh[*ctx.SelfId]
 106         } else {
 107                 node, err = ctx.FindNode(flag.Arg(0))
 108                 if err != nil {
 109                         log.Fatalln("Invalid NODE specified:", err)
 110                 }
 111         }
 112
 113         maxSize := int64(nncp.MaxFileSize)
 114         if *argMaxSize > 0 {
 115                 maxSize = int64(*argMaxSize) * 1024
 116         }
 117
 118         nncp.ViaOverride(*viaOverride, ctx, node)
 119         ctx.Umask()
 120
 121         if err = ctx.TxExec(
 122                 node,
 123                 nice,
 124                 replyNice,
 125                 flag.Args()[1],
 126                 flag.Args()[2:],
 127                 bufio.NewReaderSize(os.Stdin, nncp.MTHBlockSize),
 128                 int64(*minSize)*1024,
 129                 maxSize,
 130                 *noCompress,
 131                 areaId,
 132         ); err != nil {
 133                 log.Fatalln(err)
 134         }
 135 }