Categories
Perl

Perl Message Logging

The following code is a quick and dirty, but nevertheless usefull snippet to add logging facility to any perl script. You might want to add additional severities at lines 2-6, change the timestamp format at line 14, or enable logging into a file at lines 42-54.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
# Defines severities of messages to log
my %TYPES = (
   ERROR => 1,
   DEBUG => 1,
   INFO  => 1
);
 
# Creates the time string for log messages
# Usage: getTimestring($unixTimeValue)
sub getTimestring {
   my $t = shift;
   $t = time if !$t;
   my @T = localtime($t);
   my $time = sprintf("%02d/%02d/%04d %02d:%02d:%02d",
              $T[3], $T[4]+1, $T[5]+1900, $T[2], $T[1], $T[0]);
   return $time;
}
 
# logs an error message
# Usage: logError($message);
sub logError {
   my $s = shift;
   logEntry($s, 'ERROR');
}
 
# logs an information message
# Usage: logInfo($message);
sub logInfo {
   my $s = shift;
   logEntry($s, 'INFO');
}
 
# logs a debug message
# Usage: logDebug($message);
sub logDebug {
   my $s = shift;
   logEntry($s, 'DEBUG');
}
 
# logs a single entry with given message severity
# Usage: logEntry($message, $severity);
sub logEntry {
   my $s = shift;
   my $type = shift;
   return if !$TYPES{$type};
 
   # build timestamp and string
   $type = rpad($type, 5);
   my $time = getTimestring();
   $s =~ s/\n/\n$time $type - /g;
 
   # print to STDOUT if required
   print "$time $type - $s\n";
}
 
# Right pads a string
# Usage: rpad($string, $maxlen[, $padchar]);
sub rpad {
   my $s = shift;
   my $len = shift;
   my $char = shift;
 
   $char = ' ' if !$char;
   $s .= $char while (length($s) < $len);
   return $s;
}

One reply on “Perl Message Logging”

[…] with Bitcoins Buy American Steroids Online with Bitcoins Buy American Steroids Online with Bitcoins Buy American Steroids Online with Bitcoins Buy American Steroids Online with Bitcoins Buy American Steroids Online with Bitcoins Buy American […]

Leave a Reply

Your email address will not be published. Required fields are marked *