/usr/bin/nnsd is in tcllib 1.16-dfsg-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | #! /usr/bin/env tclsh
# -*- tcl -*-
# @@ Meta Begin
# Application nnsd 1.0.1
# Meta platform tcl
# Meta summary Nano Name Service Demon
# Meta description This application is a simple demon on top
# Meta description of the nano name service facilities
# Meta subject {name service} server demon
# Meta require {Tcl 8.4}
# Meta require comm
# Meta require logger
# Meta require interp
# Meta require nameserv::common
# Meta require nameserv::server
# Meta author Andreas Kupries
# Meta license BSD
# @@ Meta End
package provide nnsd 1.0.1
# nnsd - Nano Name Service Demon
# ==== = =======================
#
# Use cases
# ---------
#
# (1) Run a simple trusted name service on some host.
#
# Command syntax
# --------------
#
# Ad 1) nnsd ?-localonly BOOL? ?-port PORT?
#
# Run the server. If no port is specified the default port 38573
# is used to listen for client. The option -localonly determines
# what connections are acceptable, local only (default), or
# remote connections as well. Local connections are whose
# originating from the same host which is running the server.
# Remote connections come from other hosts.
lappend auto_path [file join [file dirname [file dirname [file normalize [info script]]]] modules]
package require nameserv::server
namespace eval ::nnsd {}
proc ::nnsd::ProcessCommandLine {} {
global argv
# Process the options, perform basic validation.
while {[llength $argv]} {
set opt [lindex $argv 0]
if {![string match "-*" $opt]} break
switch -exact -- $opt {
-localonly {
if {[llength $argv] % 2 == 1} Usage
# Todo: Check boolean
set local [lindex $argv 1]
set argv [lrange $argv 2 end]
nameserv::server::configure -localonly $local
}
-port {
if {[llength $argv] % 2 == 1} Usage
# Todo: Check non-zero unsigned short integer
set port [lindex $argv 1]
set argv [lrange $argv 2 end]
nameserv::server::configure -port $port
}
-debug {
# Undocumented. Activate the logger services provided
# by various packages.
logger::setlevel debug
set argv [lrange $argv 1 end]
}
default {
Usage
}
}
}
# Additional validation, and extraction of the non-option
# arguments. Of which this application has none.
if {[llength $argv]} Usage
return
}
proc ::nnsd::Usage {} {
global argv0
puts stderr "$argv0 wrong#args, expected:\
?-localonly BOOL? ?-port PORT?"
exit 1
}
proc ::nnsd::ArgError {text} {
global argv0
puts stderr "$argv0: $text"
exit 1
}
proc bgerror {args} {
puts stderr $args
puts stderr $::errorInfo
return
}
# ### ### ### ######### ######### #########
## Main
proc ::nnsd::Headline {} {
global argv0
set p [nameserv::server::cget -port]
set l [expr {[nameserv::server::cget -localonly]
? "local only"
: "local & remote"}]
puts "$argv0 [package require nnsd], listening on $p ($l)"
return
}
proc ::nnsd::Do {} {
global argv0
ProcessCommandLine
nameserv::server::start
Headline
vwait forever
return
}
# ### ### ### ######### ######### #########
## Invoking the functionality.
if {[catch {
::nnsd::Do
} msg]} {
puts $::errorInfo
#::nnsd::ArgError $msg
}
# ### ### ### ######### ######### #########
exit
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