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),
  45                         "Outbound packet niceness")
  46                 replyNiceRaw = flag.String("replynice", nncp.NicenessFmt(nncp.DefaultNiceFile),
  47                         "Possible reply packet niceness")
  48                 minSize     = flag.Uint64("minsize", 0, "Minimal required resulting packet size, in KiB")
  49                 argMaxSize  = flag.Uint64("maxsize", 0, "Maximal allowable resulting packet size, in KiB")
  50                 viaOverride = flag.String("via", "", "Override Via path to destination node")
  51                 spoolPath   = flag.String("spool", "", "Override path to spool")
  52                 logPath     = flag.String("log", "", "Override path to logfile")
  53                 quiet       = flag.Bool("quiet", false, "Print only errors")
  54                 showPrgrs   = flag.Bool("progress", false, "Force progress showing")
  55                 omitPrgrs   = flag.Bool("noprogress", false, "Omit progress showing")
  56                 debug       = flag.Bool("debug", false, "Print debug messages")
  57                 version     = flag.Bool("version", false, "Print version information")
  58                 warranty    = flag.Bool("warranty", false, "Print warranty information")
  59         )
  60         log.SetFlags(log.Lshortfile)
  61         flag.Usage = usage
  62         flag.Parse()
  63         if *warranty {
  64                 fmt.Println(nncp.Warranty)
  65                 return
  66         }
  67         if *version {
  68                 fmt.Println(nncp.VersionGet())
  69                 return
  70         }
  71         if flag.NArg() < 2 {
  72                 usage()
  73                 os.Exit(1)
  74         }
  75         nice, err := nncp.NicenessParse(*niceRaw)
  76         if err != nil {
  77                 log.Fatalln(err)
  78         }
  79         replyNice, err := nncp.NicenessParse(*replyNiceRaw)
  80         if err != nil {
  81                 log.Fatalln(err)
  82         }
  83
  84         ctx, err := nncp.CtxFromCmdline(
  85                 *cfgPath,
  86                 *spoolPath,
  87                 *logPath,
  88                 *quiet,
  89                 *showPrgrs,
  90                 *omitPrgrs,
  91                 *debug,
  92         )
  93         if err != nil {
  94                 log.Fatalln("Error during initialization:", err)
  95         }
  96         if ctx.Self == nil {
  97                 log.Fatalln("Config lacks private keys")
  98         }
  99
 100         var areaId *nncp.AreaId
 101         var node *nncp.Node
 102         if strings.HasPrefix(flag.Arg(0), nncp.AreaDir+":") {
 103                 areaId = ctx.AreaName2Id[flag.Arg(0)[len(nncp.AreaDir)+1:]]
 104                 if areaId == nil {
 105                         log.Fatalln("Unknown area specified")
 106                 }
 107                 node = ctx.Neigh[*ctx.SelfId]
 108         } else {
 109                 node, err = ctx.FindNode(flag.Arg(0))
 110                 if err != nil {
 111                         log.Fatalln("Invalid NODE specified:", err)
 112                 }
 113         }
 114
 115         maxSize := int64(nncp.MaxFileSize)
 116         if *argMaxSize > 0 {
 117                 maxSize = int64(*argMaxSize) * 1024
 118         }
 119
 120         nncp.ViaOverride(*viaOverride, ctx, node)
 121         ctx.Umask()
 122
 123         if err = ctx.TxExec(
 124                 node,
 125                 nice,
 126                 replyNice,
 127                 flag.Args()[1],
 128                 flag.Args()[2:],
 129                 bufio.NewReaderSize(os.Stdin, nncp.MTHBlockSize),
 130                 int64(*minSize)*1024,
 131                 maxSize,
 132                 *noCompress,
 133                 areaId,
 134         ); err != nil {
 135                 log.Fatalln(err)
 136         }
 137 }