script/lsec.pl
author Florian Pose <fp@igh-essen.com>
Tue, 17 Oct 2006 14:37:46 +0000
changeset 408 0eda82d1a8c1
parent 358 f557be43b8c7
child 499 fb005e975181
permissions -rwxr-xr-x
Minor output changes in master.c
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#!/usr/bin/perl
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#------------------------------------------------------------------------------
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#
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#  l s e c  -  List EtherCAT
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#
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#  Userspace tool for listing EtherCAT slaves.
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#
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#  $Id$
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#
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#  Copyright (C) 2006  Florian Pose, Ingenieurgemeinschaft IgH
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#
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#  This file is part of the IgH EtherCAT Master.
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#
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#  The IgH EtherCAT Master is free software; you can redistribute it
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#  and/or modify it under the terms of the GNU General Public License
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#  as published by the Free Software Foundation; either version 2 of the
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#  License, or (at your option) any later version.
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#
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#  The IgH EtherCAT Master is distributed in the hope that it will be
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#  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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#  GNU General Public License for more details.
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#
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#  You should have received a copy of the GNU General Public License
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#  along with the IgH EtherCAT Master; if not, write to the Free Software
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#  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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#
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#  The right to use EtherCAT Technology is granted and comes free of
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#  charge under condition of compatibility of product made by
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#  Licensee. People intending to distribute/sell products based on the
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#  code, have to sign an agreement to guarantee that products using
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#  software based on IgH EtherCAT master stay compatible with the actual
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#  EtherCAT specification (which are released themselves as an open
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#  standard) as the (only) precondition to have the right to use EtherCAT
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#  Technology, IP and trade marks.
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#
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#------------------------------------------------------------------------------
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require 'sys/ioctl.ph';
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use strict;
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use Getopt::Std;
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my %opt;
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my $master_index;
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my $master_dir;
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my $term_width;
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#------------------------------------------------------------------------------
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$term_width = &get_terminal_width;
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&get_options;
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&query_master;
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exit 0;
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#------------------------------------------------------------------------------
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sub query_master
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{
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    $master_dir = "/sys/ethercat" . $master_index;
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    &query_slaves;
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}
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#------------------------------------------------------------------------------
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sub query_slaves
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{
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    my $dirhandle;
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    my $entry;
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    my @slaves;
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    my $slave;
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    my $abs;
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    my $line;
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    my $ring_cols;
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    my $adv_cols;
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    my $fmt;
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    my $cols;
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    unless (opendir $dirhandle, $master_dir) {
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		print "Failed to open directory \"$master_dir\".\n";
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		exit 1;
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    }
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    while ($entry = readdir $dirhandle) {
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        next unless $entry =~ /^slave(\d+)$/;
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		$slave = {};
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		open INFO, "$master_dir/$entry/info" or die
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			"ERROR: Failed to open $master_dir/$entry/info";
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		while ($line = <INFO>) {
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			if ($line =~ /^Name: (.*)$/) {
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				$slave->{'name'} = $1;
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			}
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			elsif ($line =~ /^Ring position: (\d+)$/) {
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				$slave->{'ring_position'} = $1;
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			}
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			elsif ($line =~ /^Advanced position: (\d+:\d+)$/) {
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				$slave->{'advanced_position'} = $1;
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			}
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			elsif ($line =~ /^State: (.+)$/) {
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				$slave->{'state'} = $1;
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			}
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			elsif ($line =~ /^Coupler: ([a-z]+)$/) {
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				$slave->{'coupler'} = $1;
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			}
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		}
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		close INFO;
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		push @slaves, $slave;
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    }
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    closedir $dirhandle;
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    @slaves = sort { $a->{'ring_position'} <=> $b->{'ring_position'} } @slaves;
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    $ring_cols = 0;
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    $adv_cols = 0;
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    for $slave (@slaves) {
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	$cols = length $slave->{'ring_position'};
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	$ring_cols = $cols if ($cols > $ring_cols);
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	$cols = length $slave->{'advanced_position'};
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	$adv_cols = $cols if ($cols > $adv_cols);
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    }
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    $fmt = sprintf " %%%is  %%-%is  %%-6s  %%s\n", $ring_cols, $adv_cols;
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    for $slave (@slaves) {
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	&print_line if $slave->{'coupler'} eq "yes" and !defined $opt{n};
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	printf($fmt, $slave->{'ring_position'}, $slave->{'advanced_position'},
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	       $slave->{'state'}, $slave->{'name'});
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    }
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}
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#------------------------------------------------------------------------------
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sub get_options
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{
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    my $optret = getopts "m:nh", \%opt;
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    &print_usage if defined $opt{h} or $#ARGV > -1 or !$optret;
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    if (defined $opt{m}) {
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	$master_index = $opt{m};
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    }
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    else {
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	$master_index = 0;
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    }
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}
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#------------------------------------------------------------------------------
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sub print_usage
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{
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    my $cmd = `basename $0`;
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    chomp $cmd;
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    print "Usage: $cmd [OPTIONS]\n";
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    print "        -m <IDX>    Query master <IDX>.\n";
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    print "        -n          Display no coupler lines.\n";
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    print "        -h          Show this help.\n";
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    exit 0;
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}
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#------------------------------------------------------------------------------
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sub get_terminal_width
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{
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    my $winsize;
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    die "no TIOCGWINSZ " unless defined &TIOCGWINSZ;
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    open(TTY, "+</dev/tty") or die "No tty: $!";
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    unless (ioctl(TTY, &TIOCGWINSZ, $winsize='')) {
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	die sprintf "$0: ioctl TIOCGWINSZ (%08x: $!)\n", &TIOCGWINSZ;
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    }
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    (my $row, my $col, my $xpixel, my $ypixel) = unpack('S4', $winsize);
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    return $col;
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}
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#------------------------------------------------------------------------------
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sub print_line
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{
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    for (my $i = 0; $i < $term_width; $i++) {print "-";}
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    print "\n";
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}
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#------------------------------------------------------------------------------