src/cmd/nncp-exec/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 // Send execution command via NNCP.
  19 package main
  20
  21 import (
  22         "bufio"
  23         "flag"
  24         "fmt"
  25         "log"
  26         "os"
  27
  28         "go.cypherpunks.ru/nncp/v6"
  29 )
  30
  31 func usage() {
  32         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  33         fmt.Fprintf(os.Stderr, "nncp-exec -- send execution command\n\n")
  34         fmt.Fprintf(os.Stderr, "Usage: %s [options] NODE HANDLE [ARG0 ARG1 ...]\nOptions:\n", os.Args[0])
  35         flag.PrintDefaults()
  36 }
  37
  38 func main() {
  39         var (
  40                 useTmp       = flag.Bool("use-tmp", false, "Use temporary file, instead of memory buffer")
  41                 noCompress   = flag.Bool("nocompress", false, "Do not compress input data")
  42                 cfgPath      = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  43                 niceRaw      = flag.String("nice", nncp.NicenessFmt(nncp.DefaultNiceExec), "Outbound packet niceness")
  44                 replyNiceRaw = flag.String("replynice", nncp.NicenessFmt(nncp.DefaultNiceFile), "Possible reply packet niceness")
  45                 minSize      = flag.Uint64("minsize", 0, "Minimal required resulting packet size, in KiB")
  46                 viaOverride  = flag.String("via", "", "Override Via path to destination node")
  47                 spoolPath    = flag.String("spool", "", "Override path to spool")
  48                 logPath      = flag.String("log", "", "Override path to logfile")
  49                 quiet        = flag.Bool("quiet", false, "Print only errors")
  50                 showPrgrs    = flag.Bool("progress", false, "Force progress showing")
  51                 omitPrgrs    = flag.Bool("noprogress", false, "Omit progress showing")
  52                 debug        = flag.Bool("debug", false, "Print debug messages")
  53                 version      = flag.Bool("version", false, "Print version information")
  54                 warranty     = flag.Bool("warranty", false, "Print warranty information")
  55         )
  56         log.SetFlags(log.Lshortfile)
  57         flag.Usage = usage
  58         flag.Parse()
  59         if *warranty {
  60                 fmt.Println(nncp.Warranty)
  61                 return
  62         }
  63         if *version {
  64                 fmt.Println(nncp.VersionGet())
  65                 return
  66         }
  67         if flag.NArg() < 2 {
  68                 usage()
  69                 os.Exit(1)
  70         }
  71         nice, err := nncp.NicenessParse(*niceRaw)
  72         if err != nil {
  73                 log.Fatalln(err)
  74         }
  75         replyNice, err := nncp.NicenessParse(*replyNiceRaw)
  76         if err != nil {
  77                 log.Fatalln(err)
  78         }
  79
  80         ctx, err := nncp.CtxFromCmdline(
  81                 *cfgPath,
  82                 *spoolPath,
  83                 *logPath,
  84                 *quiet,
  85                 *showPrgrs,
  86                 *omitPrgrs,
  87                 *debug,
  88         )
  89         if err != nil {
  90                 log.Fatalln("Error during initialization:", err)
  91         }
  92         if ctx.Self == nil {
  93                 log.Fatalln("Config lacks private keys")
  94         }
  95
  96         node, err := ctx.FindNode(flag.Arg(0))
  97         if err != nil {
  98                 log.Fatalln("Invalid NODE specified:", err)
  99         }
 100
 101         nncp.ViaOverride(*viaOverride, ctx, node)
 102         ctx.Umask()
 103
 104         if err = ctx.TxExec(
 105                 node,
 106                 nice,
 107                 replyNice,
 108                 flag.Args()[1],
 109                 flag.Args()[2:],
 110                 bufio.NewReader(os.Stdin),
 111                 int64(*minSize)*1024,
 112                 *useTmp,
 113                 *noCompress,
 114         ); err != nil {
 115                 log.Fatalln(err)
 116         }
 117 }