check_uptime: Add option to report uptime in days instead of seconds

Currently, the plugin output is:

  CRITICAL: Uptime is 38829029 seconds.

When using the proposed `--days|-d` option, it will be:

  CRITICAL: Uptime is 449 days.

1 files changed, 15 insertions, 2 deletions

diff --git a/plugins-scripts/check_uptime.pl b/plugins-scripts/check_uptime.pl
index 4c9f22da..04324b2e 100755
--- a/plugins-scripts/check_uptime.pl
+++ b/plugins-scripts/check_uptime.pl
@@ -25,7 +25,7 @@ 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
+                                        $opt_f $opt_s $opt_d
                                         $lower_warn_threshold $upper_warn_threshold
                                         $lower_crit_threshold $upper_crit_threshold
                                         $status $state $msg);
@@ -137,9 +137,20 @@ if ( $uptime_seconds > $upper_crit_threshold ) {
         $state_str = "OK";
 }
 
+# Prepare uptime value (seconds or days)
+my $uptime_text = "";
+my $uptime_unit = "";
+if ( $opt_d ) {
+        $uptime_text = floor($uptime_seconds / 60 / 60 / 24);
+        $uptime_unit = "days";
+} else {
+        $uptime_text = $uptime_seconds;
+        $uptime_unit = "seconds";
+}
+
 $msg = "$state_str: ";
 
-$msg .= "uptime is $uptime_seconds seconds. ";
+$msg .= "uptime is $uptime_text $uptime_unit. ";
 $msg .= "Exceeds $out_of_bounds_text threshold. "  if  $out_of_bounds_text;
 $msg .= "Running for $pretty_uptime. "  if  $opt_f;
 if ( $opt_s ) {
@@ -167,6 +178,7 @@ sub process_arguments(){
                  "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 ..."
+                 "d"   => \$opt_d, "days"       => \$opt_d,       # report uptime in days
                  );
 
         if ($opt_V) {
@@ -262,6 +274,7 @@ sub print_help () {
         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 "-d (--days)      = Show uptime in days\n";
         print "-h (--help)\n";
         print "-V (--version)\n";
         print "-v (--verbose)   = debugging output\n";