I run smokeping on many boxes and and my Gentoo/Funtoo boxes frequently run

into localization setup issues which will bomb out Smokeping's web
interface.  It works fine invoked from the shell.  I use the attached patch
to help me diagnose the server setup problem.  The behavior is identical to
current Smokeping in that it logs a message and throws a HTTP 500 error.
The basic Smokeping localization sanity check has uncovered "insane" setups
where the PERL %ENV environment variables are being ignored by "setlocale"
on several of my boxes for unknown reasons.  Obviously, smokeping should
quit, which it does... -- Lee Thompson stagr.lee gmail.com

1 files changed, 65 insertions, 17 deletions

diff --git a/lib/Smokeping.pm b/lib/Smokeping.pm
index 136b56b..6828430 100644
--- a/lib/Smokeping.pm
+++ b/lib/Smokeping.pm
@@ -8,7 +8,9 @@ use Pod::Usage;
 use Digest::MD5 qw(md5_base64);
 use SNMP_util;
 use SNMP_Session;
-use POSIX;
+# enable locale??
+#use locale;
+use POSIX qw(locale_h signal_h sys_wait_h);
 use Smokeping::Config;
 use RRDs;
 use Sys::Syslog qw(:DEFAULT setlogsock);
@@ -26,9 +28,36 @@ setlogsock('unix')
 # make sure we do not end up with , in odd places where one would expect a '.'
 # we set the environment variable so that our 'kids' get the benefit too
 
-$ENV{LC_NUMERIC}='C';
-if (POSIX::setlocale(&POSIX::LC_NUMERIC,"") ne "C") {
-    die("Resetting LC_NUMERIC failed - try removing LC_ALL from the environment");
+$ENV{'LC_NUMERIC'}='C';
+if (setlocale(LC_NUMERIC,"") ne "C") {
+    if ($ENV{'LC_ALL'} eq 'C') {
+        # This has got to be a bug in perl/mod_perl, apache or libc
+        die("Your internalization implementation on your operating system is "
+          . "not responding to your setup of LC_ALL to \"C\" as LC_NUMERIC is "
+          . "coming up as \"" . setlocale(LC_NUMERIC, "") . "\" leaving "
+          . "smokeping unable to compare numbers...");
+    }
+    elsif ($ENV{'LC_ALL'} ne "") {
+        # This error is most likely setup related and easy to fix with proper 
+        # setup of the operating system or multilanguage locale setup.  Hint,
+        # setting LANG is better than setting LC_ALL...
+        die("Resetting LC_NUMERIC failed probably because your international "
+          . "setup of the LC_ALL to \"". $ENV{'LC_ALL'} . "\" is overridding "
+          . "LC_NUMERIC.  Setting LC_ALL is not compatible with smokeping...");
+    }
+    else {
+        # This is pretty nasty to figure out.  Seems there are still lots
+        # of bugs in LOCALE behavior and if you get this error, you are
+        # affected by it.  The worst is when "setlocale" is reading the
+        # environment variables of your webserver and not reading the PERL
+        # %ENV array like it should.
+        die("Something is wrong with the internalization setup of your "
+          . "operating system, webserver, or the perl plugin to your webserver "
+          . "(like mod_perl) and smokeping can not compare numbers correctly.  "
+          . "On unix, check your /etc/locale.gen and run sudo locale-gen, set "
+          . "LC_NUMERIC in your perl plugin config or even your webserver "
+          . "startup script to potentially fix or work around the problem...");
+    }
 }
 
 
@@ -311,11 +340,14 @@ FOR
                 for(1..$multis){
                     $extra .= "-\$i$_";
                 };
-                /^(==|!=|<|>|<=|>=|\*)(\d+(?:\.\d*)?|U|S|\d*\*)(%?)$/
+                /^(==|!=|<|>|<=|>=|\*)(\d+(?:\.\d*)?|U|S|\d*\*)(%?)(?:(<|>|<=|>=)(\d+(?:\.\d*)?)(%?))$/
                     or die "ERROR: Alert $al pattern entry '$_' is invalid\n";
                 my $op = $1;
                 my $value = $2;
                 my $perc = $3;
+                my $op2 = $4;
+                my $value2 = $5;
+                my $perc2 = $6;
                 if ($op eq '*') {
                     if ($value =~ /^([1-9]\d*)\*$/) {
                         $value = $1;
@@ -336,17 +368,17 @@ FOR
                 } elsif ($value eq 'U') {
                     if ($op eq '==') {
                         $sub .= "$it        next if defined \$y->[$i$extra];\n";
-                } elsif ($op eq '!=') {
-                    $sub .= "$it        next unless defined \$y->[$i$extra];\n";
-                } else {
-                    die "ERROR: invalid operator $op in connection U in Alert $al definition\n";
-                }
+                    } elsif ($op eq '!=') {
+                        $sub .= "$it        next unless defined \$y->[$i$extra];\n";
+                    } else {
+                        die "ERROR: invalid operator $op in connection U in Alert $al definition\n";
+                    }
                 } elsif ($value eq 'S') {
                     if ($op eq '==') {
                         $sub .= "$it        next unless defined \$y->[$i$extra] and \$y->[$i$extra] eq 'S';\n";
                     } else {
                         die "ERROR: S is only valid with == operator in Alert $al definition\n";
-                }
+                    }
                 } elsif ($value eq '*') {
                     if ($op ne '==') {
                         die "ERROR: operator $op makes no sense with * in Alert $al definition\n";
@@ -354,16 +386,27 @@ FOR
                 } else {
                     if ( $x->{type} eq 'loss') {
                         die "ERROR: loss should be specified in % (alert $al pattern)\n" unless $perc eq "%";
-                } elsif ( $x->{type} eq 'rtt' ) {
-                    $value /= 1000;
-                } else {
-                    die "ERROR: unknown alert type $x->{type}\n";
-                }
+                    } elsif ( $x->{type} eq 'rtt' ) {
+                        $value /= 1000;
+                    } else {
+                        die "ERROR: unknown alert type $x->{type}\n";
+                    }
                     $sub .= <<IF;
 $it        next unless defined \$y->[$i$extra]
 $it                        and \$y->[$i$extra] =~ /^\\d/
-$it                        and \$y->[$i$extra] $op $value;
+$it                        and \$y->[$i$extra] $op $value
 IF
+                    if ($op2){
+                       if ( $x->{type} eq 'loss') {
+                          die "ERROR: loss should be specified in % (alert $al pattern)\n" unless $perc2 eq "%";
+                       } elsif ( $x->{type} eq 'rtt' ) {
+                          $value2 /= 1000;
+                       }                    
+                       $sub  .= <<IF;
+$it                        and \$y->[$i$extra] $op2 $value2            
+IF
+                    }
+                    $sub .= "$it                             ;";
                 }
                 $i++;
             }
@@ -3205,6 +3248,11 @@ You can write
 to detect lines that have been losing more than 20% of the packets for two
 periods after startup.
 
+If you want to make sure a value within a certain range you can use two conditions
+in one element
+
+ >45%<=55%
+
 Sometimes it may be that conditions occur at irregular intervals. But still
 you only want to throw an alert if they occur several times within a certain
 amount of times. The operator B<*X*> will ignore up to I<X> values and still