rina: run if no activity.
This commit is contained in:
parent
57ef5dd8fe
commit
6a24480144
6
Makefile
6
Makefile
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@ -1,10 +1,10 @@
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CMD = blink bsearch duplicate-packets em encdir field forever G \
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gitnext gitundo goodpasswd histogram mtrr neno off pdfman puniq \
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ramusage rand rclean rn rrm shython sound-reload stdout swapout T \
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timestamp tracefile upsidedown w4it-for-port-open wifi-reload wssh \
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ramusage rand rclean rina rn rrm shython sound-reload stdout swapout \
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T timestamp tracefile upsidedown w4it-for-port-open wifi-reload wssh \
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ytv yyyymmdd
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all: blink/blink.1 bsearch/bsearch.1 encdir/encdir.1 G/G.1 gitnext/gitnext.1 gitundo/gitundo.1 goodpasswd/goodpasswd.1 histogram/histogram.1 neno/neno.1 off/off.1 pdfman/pdfman.1 puniq/puniq.1 rand/rand.1 rn/rn.1 rrm/rrm.1 shython/shython.1 sound-reload/sound-reload.1 stdout/stdout.1 timestamp/timestamp.1 tracefile/tracefile.1 T/T.1 upsidedown/upsidedown.1 wifi-reload/wifi-reload.1 wssh/wssh.1 ytv/ytv.1 yyyymmdd/yyyymmdd.1
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all: blink/blink.1 bsearch/bsearch.1 encdir/encdir.1 G/G.1 gitnext/gitnext.1 gitundo/gitundo.1 goodpasswd/goodpasswd.1 histogram/histogram.1 neno/neno.1 off/off.1 pdfman/pdfman.1 puniq/puniq.1 rand/rand.1 rina/rina.1 rn/rn.1 rrm/rrm.1 shython/shython.1 sound-reload/sound-reload.1 stdout/stdout.1 timestamp/timestamp.1 tracefile/tracefile.1 T/T.1 upsidedown/upsidedown.1 wifi-reload/wifi-reload.1 wssh/wssh.1 ytv/ytv.1 yyyymmdd/yyyymmdd.1
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%.1: %
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pod2man $< > $@
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2
README
2
README
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@ -38,6 +38,8 @@ rclean - Remove files with MD5 sums recorded by rrm (see below).
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reniced - Renice all commands running more than 1 CPU minute unless they are niced or whitelisted.
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rina - Run if no activity.
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rn - Move file(s)/dir(s) to .rm/ (wastebasket).
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rrm - Record file's MD5 sum before removing it.
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@ -1,5 +1,7 @@
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#!/bin/bash
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IF=wls1
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sudo tc qdisc del dev $IF root netem delay 300 duplicate 40
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sudo tc qdisc add dev $IF root netem delay 300 duplicate 40
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sudo tc qdisc del dev $IF root netem duplicate 50
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sudo tc qdisc add dev $IF root netem duplicate 50
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#sudo tc qdisc del dev $IF root netem duplicate 100% delay 300ms
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#sudo tc qdisc add dev $IF root netem duplicate 100% delay 300ms
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173
rina/rina
Executable file
173
rina/rina
Executable file
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@ -0,0 +1,173 @@
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#!/usr/bin/perl
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=pod
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=head1 NAME
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rina - run if no activity
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=head1 SYNOPSIS
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... | B<rina> [-v] [-t timeout] I<command>
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=head1 OPTIONS
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=over 9
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=item B<-v>
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Verbose. Print when I<command> is run.
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=back
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=head1 DESCRIPTION
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B<rina> monitors a pipe. If there is no activity on the pipe for
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I<timeout> seconds, it runs I<command>.
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=head1 EXAMPLE
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Restart networking if Google's DNS does not repond to ping:
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ping 8.8.8.8 | rina -t 20 /etc/init.d/networking restart
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=head1 AUTHOR
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Copyright (C) 2017 Ole Tange,
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http://ole.tange.dk and Free Software Foundation, Inc.
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=head1 LICENSE
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Copyright (C) 2012 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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at your option any later version.
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This program is distributed in the hope that it will be useful,
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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=head1 DEPENDENCIES
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B<rina> uses B<perl>.
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=head1 SEE ALSO
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B<perl>
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=cut
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use Getopt::Long;
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use Time::HiRes;
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use POSIX qw(strftime);
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get_options_from_array(\@ARGV);
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my $in_fh = *STDIN;
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set_fh_non_blocking($in_fh);
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while(1){
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sleep($opt::timeout || 10);
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if(not read($in_fh,$dummy,32768)) {
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# run_command
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@opt::verbose and print iso8601(Time::HiRes::time())," Running @ARGV\n";
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system(@ARGV);
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wait();
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@opt::verbose and print iso8601(Time::HiRes::time())," Done @ARGV\n";
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}
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# empty_buffer
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while(read($in_fh,$dummy,32768)) { }
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}
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sub iso8601 {
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my $time = shift;
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my $tz = strftime("%z", localtime($time));
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$tz =~ s/(\d{2})(\d{2})/$1:$2/;
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my $ms = sprintf "%03d", int(($time - int($time))*1000);
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return strftime("%Y-%m-%dT%H:%M:%S.".$ms, localtime($time)). $tz;
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}
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sub set_fh_non_blocking {
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# Set filehandle as non-blocking
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# Inputs:
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# $fh = filehandle to be blocking
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# Returns:
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# N/A
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my $fh = shift;
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$Global::use{"Fcntl"} ||= eval "use Fcntl qw(:DEFAULT :flock); 1;";
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my $flags;
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# Get the current flags on the filehandle
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fcntl($fh, &F_GETFL, $flags) || die $!;
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# Add non-blocking to the flags
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$flags |= &O_NONBLOCK;
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# Set the flags on the filehandle
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fcntl($fh, &F_SETFL, $flags) || die $!;
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}
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sub options_hash {
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# Returns:
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# %hash = the GetOptions config
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return
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("debug|D=s" => \$opt::D,
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"verbose|v" => \@opt::verbose,
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"timeout|t=s" => \$opt::timeout,
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);
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}
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sub get_options_from_array {
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# Run GetOptions on @array
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# Input:
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# $array_ref = ref to @ARGV to parse
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# @keep_only = Keep only these options
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# Uses:
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# @ARGV
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# Returns:
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# true if parsing worked
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# false if parsing failed
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# @$array_ref is changed
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my ($array_ref, @keep_only) = @_;
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if(not @$array_ref) {
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# Empty array: No need to look more at that
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return 1;
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}
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# A bit of shuffling of @ARGV needed as GetOptionsFromArray is not
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# supported everywhere
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my @save_argv;
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my $this_is_ARGV = (\@::ARGV == $array_ref);
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if(not $this_is_ARGV) {
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@save_argv = @::ARGV;
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@::ARGV = @{$array_ref};
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}
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# If @keep_only set: Ignore all values except @keep_only
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my %options = options_hash();
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if(@keep_only) {
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my (%keep,@dummy);
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@keep{@keep_only} = @keep_only;
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for my $k (grep { not $keep{$_} } keys %options) {
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# Store the value of the option in @dummy
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$options{$k} = \@dummy;
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}
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}
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my $retval = GetOptions(%options);
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if(not $this_is_ARGV) {
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@{$array_ref} = @::ARGV;
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@::ARGV = @save_argv;
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}
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return $retval;
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}
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