[monitoring-plugins] My version of check_uptime

[Bernd Arnold]

 Module: monitoring-plugins
 Branch: master
 Commit: 96c8dd89353be67d44ce7a21b90f621ad89a2984
 Author: Bernd Arnold <wopfel at gmail.com>
   Date: Wed May 30 19:03:43 2018 +0200
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=96c8dd8

My version of check_uptime

Derived from check_mailq

---

 plugins-scripts/check_uptime | 256 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 256 insertions(+)

diff --git a/plugins-scripts/check_uptime b/plugins-scripts/check_uptime
new file mode 100755
index 0000000..4bc9528
--- /dev/null
+++ b/plugins-scripts/check_uptime
@@ -0,0 +1,256 @@
+#!/usr/bin/perl -w
+
+# check_uptime - check uptime to see how long the system is running.
+#
+
+# License Information:
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
+# USA
+#
+############################################################################
+
+use POSIX;
+use strict;
+use Getopt::Long;
+use vars qw($opt_V $opt_h $opt_v $verbose $PROGNAME $opt_w $opt_c
+					$opt_f $opt_s
+					$status $state $msg);
+use FindBin;
+use lib "$FindBin::Bin";
+use lib "/usr/lib/monitoring-plugins/";
+use utils qw(%ERRORS &print_revision &support &usage );
+
+sub print_help ();
+sub print_usage ();
+sub process_arguments ();
+
+#$ENV{'PATH'}='/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin';
+$ENV{'BASH_ENV'}=''; 
+$ENV{'ENV'}='';
+$PROGNAME = "check_uptime";
+$state = $ERRORS{'UNKNOWN'};
+
+
+# Process arguments
+
+Getopt::Long::Configure('bundling');
+$status = process_arguments();
+if ($status){
+	print "ERROR: processing arguments\n";
+	exit $ERRORS{"UNKNOWN"};
+}
+
+
+# Get uptime info from file
+
+my $uptime_file = "/proc/uptime";
+
+if ( ! -r $uptime_file ) {
+	print "ERROR: file '$uptime_file' is not readable\n";
+	exit $ERRORS{"UNKNOWN"};
+}
+
+if ( ! open FILE, "<", $uptime_file ) {
+	print "ERROR: cannot read from file '$uptime_file'\n";
+	exit $ERRORS{"UNKNOWN"};
+}
+
+chomp( my $file_content = <FILE> );
+close FILE;
+
+print "$uptime_file: $file_content\n" if $verbose;
+
+# Get first digit value (without fraction)
+my ( $uptime_seconds ) = $file_content =~ /^([\d]+)/;
+
+# Bail out if value is not numeric
+if ( $uptime_seconds !~ /^\d+$/ ) {
+	print "ERROR: no numeric value: $uptime_seconds\n";
+	exit $ERRORS{"UNKNOWN"};
+}
+
+
+# Do calculations for a "pretty" format (2 weeks, 5 days, ...)
+
+my ( $secs, $mins, $hours, $days, $weeks );
+$secs = $uptime_seconds;
+if ( $secs > 100 ) {
+	$mins = int( $secs / 60 );
+	$secs -= $mins * 60;
+}
+if ( $mins > 100 ) {
+	$hours = int( $mins / 60 );
+	$mins -= $hours * 60;
+}
+if ( $hours > 48 ) {
+	$days = int( $hours / 24 );
+	$hours -= $days * 24;
+}
+if ( $days > 14 ) {
+	$weeks = int( $days / 7 );
+	$days -= $weeks * 7;
+}
+
+my $pretty_uptime = "";
+$pretty_uptime .= sprintf( "%d week%s, ",   $weeks, $weeks == 1 ? "" : "s" )  if  $weeks;
+$pretty_uptime .= sprintf( "%d day%s, ",    $days, $days == 1 ? "" : "s" )    if  $days;
+$pretty_uptime .= sprintf( "%d hour%s, ",   $hours, $hours == 1 ? "" : "s" )  if  $hours;
+$pretty_uptime .= sprintf( "%d minute%s, ", $mins, $mins == 1 ? "" : "s" )    if  $mins;
+# Replace last occurence of comma with "and"
+$pretty_uptime =~ s/, $/ and /;
+# Always print the seconds (though it may be 0 seconds)
+$pretty_uptime .= sprintf( "%d second%s", $secs, $secs == 1 ? "" : "s" );
+
+
+# Default to catch errors in program
+my $state_str = "UNKNOWN";
+
+# Check values
+if ( $uptime_seconds > $opt_c ) {
+	$state_str = "CRITICAL";
+} elsif ( $uptime_seconds > $opt_w ) {
+	$state_str = "WARNING";
+} else {
+	$state_str = "OK";
+}
+
+$msg = "$state_str: ";
+
+$msg .= "uptime is $uptime_seconds seconds. ";
+$msg .= "Running for $pretty_uptime. "  if  $opt_f;
+if ( $opt_s ) {
+	chomp( my $up_since = `uptime -s` );
+	$msg .= "Running since $up_since. ";
+}
+
+$state = $ERRORS{$state_str};
+
+# Perfdata support
+print "$msg|uptime=$uptime_seconds;$opt_w;$opt_c;0\n";
+exit $state;
+
+
+#####################################
+#### subs
+
+
+sub process_arguments(){
+	GetOptions
+		("V"   => \$opt_V, "version"	=> \$opt_V,
+		 "v"   => \$opt_v, "verbose"	=> \$opt_v,
+		 "h"   => \$opt_h, "help"		=> \$opt_h,
+		 "w=s" => \$opt_w, "warning=s"  => \$opt_w,   # warning if above this number
+		 "c=s" => \$opt_c, "critical=s" => \$opt_c,	  # critical if above this number
+		 "f"   => \$opt_f, "for"        => \$opt_f,	  # show "running for ..."
+		 "s"   => \$opt_s, "since"      => \$opt_s,	  # show "running since ..."
+		 );
+
+	if ($opt_V) {
+		print_revision($PROGNAME,'2.2');
+		exit $ERRORS{'UNKNOWN'};
+	}
+
+	if ($opt_h) {
+		print_help();
+		exit $ERRORS{'UNKNOWN'};
+	}
+
+	if (defined $opt_v) {
+		$verbose = $opt_v;
+	}
+
+	unless ( defined $opt_w && defined $opt_c ) {
+		print_usage();
+		exit $ERRORS{'UNKNOWN'};
+	}
+
+	# Check if suffix is present
+	# Calculate parameter to seconds (to get an integer value finally)
+	# s = seconds
+	# m = minutes
+	# h = hours
+	# d = days
+	# w = weeks
+	my %factor = ( "s" => 1,
+		       "m" => 60,
+		       "h" => 60 * 60,
+		       "d" => 60 * 60 * 24,
+		       "w" => 60 * 60 * 24 * 7,
+		     );
+	if ( $opt_w =~ /^(\d+)([a-z])$/ ) {
+		my $value = $1;
+		my $suffix = $2;
+                print "warning: value=$value, suffix=$suffix\n" if $verbose;
+		if ( ! defined $factor{$suffix} ) {
+			print "Error: wrong suffix ($suffix) for warning";
+			exit $ERRORS{'UNKNOWN'};
+		}
+		$opt_w = $value * $factor{$suffix};
+	}
+	if ( $opt_c =~ /^(\d+)([a-z])$/ ) {
+		my $value = $1;
+		my $suffix = $2;
+                print "critical: value=$value, suffix=$suffix\n" if $verbose;
+		if ( ! defined $factor{$suffix} ) {
+			print "Error: wrong suffix ($suffix) for critical";
+			exit $ERRORS{'UNKNOWN'};
+		}
+		$opt_c = $value * $factor{$suffix};
+	}
+
+	if ( $opt_w !~ /^\d+$/ ) {
+		print "Warning (-w) is not numeric\n";
+		exit $ERRORS{'UNKNOWN'};
+	}
+	if ( $opt_c !~ /^\d+$/ ) {
+		print "Critical (-c) is not numeric\n";
+		exit $ERRORS{'UNKNOWN'};
+	}
+
+	if ( $opt_w >= $opt_c) {
+		print "Warning (-w) cannot be greater than Critical (-c)!\n";
+		exit $ERRORS{'UNKNOWN'};
+	}
+
+	return $ERRORS{'OK'};
+}
+
+sub print_usage () {
+	print "Usage: $PROGNAME -w <warn> -c <crit> [-v]\n";
+}
+
+sub print_help () {
+	print_revision($PROGNAME,'2.2');
+	print "Copyright (c) 2002 Subhendu Ghosh/Carlos Canau/Benjamin Schmid\n";
+	print "Copyright (c) 2018 Bernd Arnold\n";
+	print "\n";
+	print_usage();
+	print "\n";
+	print "   Checks the uptime of the system using $uptime_file\n";
+	print "\n";
+	print "-w (--warning)   = Min. number of uptime to generate warning\n";
+	print "-c (--critical)  = Min. number of uptime to generate critical alert ( w < c )\n";
+	print "-f (--for)       = Show uptime in a pretty format (Running for x weeks, x days, ...)\n";
+	print "-s (--since)     = Show last boot in yyyy-mm-dd HH:MM:SS format (output from 'uptime -s')\n";
+	print "-h (--help)\n";
+	print "-V (--version)\n";
+	print "-v (--verbose)   = debugging output\n";
+	print "\n\n";
+	print "Note: -w and -c are required arguments.\n";
+	print "      You can suffix both values with s for seconds (default), m (minutes), h (hours), d (days) or w (weeks).\n";
+	print "";
+	print "\n\n";
+	support();
+}