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Full Discussion: How to grep logs for errors and receive specific additional lines?
Top Forums Shell Programming and Scripting How to grep logs for errors and receive specific additional lines? Post 302855805 by nbsparks on Saturday 21st of September 2013 01:34:41 AM
Old 09-21-2013
weird... so I just grabbed my original data sample (that you're using) and saved that as "server2.log" and redirected the last line of the script to server2.log. Still no results.

---------- Post updated at 10:30 PM ---------- Previous update was at 10:28 PM ----------

Just to check, I switched top line of script from "#!/bin/bash" to "#!/bin/sh". Still no difference.

---------- Post updated at 10:34 PM ---------- Previous update was at 10:30 PM ----------

I only modified the path line that I know and added the set-x debug line. I did have it > to a file for a bit, but here's how it is now.

Code:
mc@minecraftserver ~/scripts$ cat test.sh
#!/bin/sh

set -x

awk -F"[][]" '
# pc() -- print context
# print up to 11 lines of context and clear context.
function pc(    i) {
        for(i = (lc > 10) ? lc - 10 : 1; i <= lc; i++)
                print l[i]
        lc = 0
}
!/^[1-9][0-9]{3}-[01][0-9]-[0-3][0-9]/ {
        nts = 1 # we have found a line with No Time Stamp
        if(severe) {
                pc()    # print context
                print   # print this line (which follows the SEVERE tag).
        }
        next
}
/^[1-9][0-9]{3}-[01][0-9]-[0-3][0-9]/ {
        if(nts)
                # 1st line after one or more lines with no time stamp...
                severe = nts = lc = 0
        l[++lc] = $0
        if($2 == "SEVERE") severe = 1
}' /home/mc/servers/bukkitpvt/server.log
mc@minecraftserver ~/scripts$ ./test.sh
+ awk -F[][]
# pc() -- print context
# print up to 11 lines of context and clear context.
function pc(    i) {
        for(i = (lc > 10) ? lc - 10 : 1; i <= lc; i++)
                print l[i]
        lc = 0
}
!/^[1-9][0-9]{3}-[01][0-9]-[0-3][0-9]/ {
        nts = 1 # we have found a line with No Time Stamp
        if(severe) {
                pc()    # print context
                print   # print this line (which follows the SEVERE tag).
        }
        next
}
/^[1-9][0-9]{3}-[01][0-9]-[0-3][0-9]/ {
        if(nts)
                # 1st line after one or more lines with no time stamp...
                severe = nts = lc = 0
        l[++lc] = $0
        if($2 == "SEVERE") severe = 1
} /home/mc/servers/bukkitpvt/server.log
mc@minecraftserver ~/scripts$

 

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LEARN ABOUT XFREE86

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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