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Diffstat (limited to 'contrib/check_log2.pl')
| -rw-r--r-- | contrib/check_log2.pl | 185 |
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diff --git a/contrib/check_log2.pl b/contrib/check_log2.pl new file mode 100644 index 00000000..befbf98d --- /dev/null +++ b/contrib/check_log2.pl | |||
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| 1 | #!/usr/bin/perl | ||
| 2 | # | ||
| 3 | # Log file regular expression detector for Nagios. | ||
| 4 | # Written by Aaron Bostick (abostick@mydoconline.com) | ||
| 5 | # Last modified: 05-02-2002 | ||
| 6 | # | ||
| 7 | # Thanks and acknowledgements to Ethan Galstad for Nagios and the check_log | ||
| 8 | # plugin this is modeled after. | ||
| 9 | # | ||
| 10 | # Usage: check_log2 -l <log_file> -s <seek_file> -p <pattern> [-n <negpattern>] | ||
| 11 | # | ||
| 12 | # Description: | ||
| 13 | # | ||
| 14 | # This plugin will scan arbitrary text files looking for regular expression | ||
| 15 | # matches. The text file to scan is specified with <log_file>. | ||
| 16 | # <log_seek_file> is a temporary file used to store the seek byte position | ||
| 17 | # of the last scan. This file will be created automatically on the first | ||
| 18 | # scan. <pattern> can be any RE pattern that perl's s/// syntax accepte. Be | ||
| 19 | # forewarned that a bad pattern will send this script into never never land! | ||
| 20 | # | ||
| 21 | # Output: | ||
| 22 | # | ||
| 23 | # This plugin returns OK when a file is successfully scanned and no pattern | ||
| 24 | # matches are found. WARNING is returned when 1 or more patterns are found | ||
| 25 | # along with the pattern count and the line of the last pattern matched. | ||
| 26 | # CRITICAL is returned when an error occurs, such as file not found, etc. | ||
| 27 | # | ||
| 28 | # Notes (paraphrased from check_log's notes): | ||
| 29 | # | ||
| 30 | # 1. The "max_attempts" value for the service should be 1, as this | ||
| 31 | # will prevent Nagios from retrying the service check (the | ||
| 32 | # next time the check is run it will not produce the same results). | ||
| 33 | # | ||
| 34 | # 2. The "notify_recovery" value for the service should be 0, so that | ||
| 35 | # Nagios does not notify you of "recoveries" for the check. Since | ||
| 36 | # pattern matches in the log file will only be reported once and not | ||
| 37 | # the next time, there will always be "recoveries" for the service, even | ||
| 38 | # though recoveries really don't apply to this type of check. | ||
| 39 | # | ||
| 40 | # 3. You *must* supply a different <log_Seek_file> for each service that | ||
| 41 | # you define to use this plugin script - even if the different services | ||
| 42 | # check the same <log_file> for pattern matches. This is necessary | ||
| 43 | # because of the way the script operates. | ||
| 44 | # | ||
| 45 | # Examples: | ||
| 46 | # | ||
| 47 | # Check for error notices in messages | ||
| 48 | # check_log2 -l /var/log/messages -s ./check_log2.messages.seek -p 'err' | ||
| 49 | # | ||
| 50 | |||
| 51 | |||
| 52 | BEGIN { | ||
| 53 | if ($0 =~ s/^(.*?)[\/\\]([^\/\\]+)$//) { | ||
| 54 | $prog_dir = $1; | ||
| 55 | $prog_name = $2; | ||
| 56 | } | ||
| 57 | } | ||
| 58 | |||
| 59 | require 5.004; | ||
| 60 | |||
| 61 | use lib $main::prog_dir; | ||
| 62 | use utils qw($TIMEOUT %ERRORS &print_revision &support &usage); | ||
| 63 | use Getopt::Long; | ||
| 64 | |||
| 65 | sub print_usage (); | ||
| 66 | sub print_version (); | ||
| 67 | sub print_help (); | ||
| 68 | |||
| 69 | # Initialize strings | ||
| 70 | $log_file = ''; | ||
| 71 | $seek_file = ''; | ||
| 72 | $re_pattern = ''; | ||
| 73 | $neg_re_pattern = ''; | ||
| 74 | $pattern_count = 0; | ||
| 75 | $pattern_line = ''; | ||
| 76 | $plugin_revision = '$Revision$ '; | ||
| 77 | |||
| 78 | # Grab options from command line | ||
| 79 | GetOptions | ||
| 80 | ("l|logfile=s" => \$log_file, | ||
| 81 | "s|seekfile=s" => \$seek_file, | ||
| 82 | "p|pattern=s" => \$re_pattern, | ||
| 83 | "n|negpattern:s" => \$neg_re_pattern, | ||
| 84 | "v|version" => \$version, | ||
| 85 | "h|help" => \$help); | ||
| 86 | |||
| 87 | !($version) || print_version (); | ||
| 88 | !($help) || print_help (); | ||
| 89 | |||
| 90 | # Make sure log file is specified | ||
| 91 | ($log_file) || usage("Log file not specified.\n"); | ||
| 92 | # Make sure seek file is specified | ||
| 93 | ($seek_file) || usage("Seek file not specified.\n"); | ||
| 94 | # Make sure re pattern is specified | ||
| 95 | ($re_pattern) || usage("Regular expression not specified.\n"); | ||
| 96 | |||
| 97 | # Open log file | ||
| 98 | open LOG_FILE, $log_file || die "Unable to open log file $log_file: $!"; | ||
| 99 | |||
| 100 | # Try to open log seek file. If open fails, we seek from beginning of | ||
| 101 | # file by default. | ||
| 102 | if (open(SEEK_FILE, $seek_file)) { | ||
| 103 | chomp(@seek_pos = <SEEK_FILE>); | ||
| 104 | close(SEEK_FILE); | ||
| 105 | |||
| 106 | # If file is empty, no need to seek... | ||
| 107 | if ($seek_pos[0] != 0) { | ||
| 108 | |||
| 109 | # Compare seek position to actual file size. If file size is smaller | ||
| 110 | # then we just start from beginning i.e. file was rotated, etc. | ||
| 111 | ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks) = stat(LOG_FILE); | ||
| 112 | |||
| 113 | if ($seek_pos[0] <= $size) { | ||
| 114 | seek(LOG_FILE, $seek_pos[0], 0); | ||
| 115 | } | ||
| 116 | } | ||
| 117 | } | ||
| 118 | |||
| 119 | # Loop through every line of log file and check for pattern matches. | ||
| 120 | # Count the number of pattern matches and remember the full line of | ||
| 121 | # the most recent match. | ||
| 122 | while (<LOG_FILE>) { | ||
| 123 | if ($neg_re_pattern) { | ||
| 124 | if ((/$re_pattern/) && !(/$neg_re_pattern/)) { | ||
| 125 | $pattern_count += 1; | ||
| 126 | $pattern_line = $_; | ||
| 127 | } | ||
| 128 | } elsif (/$re_pattern/) { | ||
| 129 | $pattern_count += 1; | ||
| 130 | $pattern_line = $_; | ||
| 131 | } | ||
| 132 | } | ||
| 133 | |||
| 134 | # Overwrite log seek file and print the byte position we have seeked to. | ||
| 135 | open(SEEK_FILE, "> $seek_file") || die "Unable to open seek count file $seek_file: $!"; | ||
| 136 | print SEEK_FILE tell(LOG_FILE); | ||
| 137 | |||
| 138 | # Close seek file. | ||
| 139 | close(SEEK_FILE); | ||
| 140 | # Close the log file. | ||
| 141 | close(LOG_FILE); | ||
| 142 | |||
| 143 | # Print result and return exit code. | ||
| 144 | if ($pattern_count) { | ||
| 145 | print "($pattern_count): $pattern_line"; | ||
| 146 | exit $ERRORS{'WARNING'}; | ||
| 147 | } else { | ||
| 148 | print "OK - No matches found.\n"; | ||
| 149 | exit $ERRORS{'OK'}; | ||
| 150 | } | ||
| 151 | |||
| 152 | # | ||
| 153 | # Subroutines | ||
| 154 | # | ||
| 155 | |||
| 156 | sub print_usage () { | ||
| 157 | print "Usage: $prog_name -l <log_file> -s <log_seek_file> -p <pattern> [-n <negpattern>]\n"; | ||
| 158 | print "Usage: $prog_name [ -v | --version ]\n"; | ||
| 159 | print "Usage: $prog_name [ -h | --help ]\n"; | ||
| 160 | } | ||
| 161 | |||
| 162 | sub print_version () { | ||
| 163 | print_revision($prog_name, $plugin_revision); | ||
| 164 | exit $ERRORS{'OK'}; | ||
| 165 | } | ||
| 166 | |||
| 167 | sub print_help () { | ||
| 168 | print_revision($prog_name, $plugin_revision); | ||
| 169 | print "\n"; | ||
| 170 | print "Scan arbitrary log files for regular expression matches.\n"; | ||
| 171 | print "\n"; | ||
| 172 | print_usage(); | ||
| 173 | print "\n"; | ||
| 174 | print "-l, --logfile=<logfile>\n"; | ||
| 175 | print " The log file to be scanned\n"; | ||
| 176 | print "-s, --seekfile=<seekfile>\n"; | ||
| 177 | print " The temporary file to store the seek position of the last scan\n"; | ||
| 178 | print "-p, --pattern=<pattern>\n"; | ||
| 179 | print " The regular expression to scan for in the log file\n"; | ||
| 180 | print "-n, --negpattern=<negpattern>\n"; | ||
| 181 | print " The regular expression to skip in the log file\n"; | ||
| 182 | print "\n"; | ||
| 183 | support(); | ||
| 184 | exit $ERRORS{'OK'}; | ||
| 185 | } | ||
