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Top Forums Shell Programming and Scripting Only Regex pattern match help Post 302887365 by radioactive9 on Friday 7th of February 2014 03:41:57 AM
Old 02-07-2014
[Solved] Only Regex pattern match help

Hi

We have a tool to monitor logs in our environment. The tool accepts log pattern match only using regex and I accept I am a n00b in thatSmilie. I had been banging my head to make it work without much success and at last had to turn on to my last option to post it here. I had got great helps in the past and hoping I will get the same again Smilie

Here is the pattern

Code:
 
[26/Jan/2014:09:47:34 +0000] "GET /etc/designs/dlg/clientlibs/commons/base/img/close-icon.png HTTP/1.1" 500
[26/Jan/2014:09:47:34 +0000] "GET /etc/designs/dlg/clientlibs/commons/base/img/close-icon.png HTTP/1.1" 200 587
[26/Jan/2014:09:47:34 +0000] "GET /etc/designs/dlg/clientlibs/commons/base/img/close-icon.png HTTP/1.1" 5020 1221 abcd123
[26/Jan/2014:09:47:34 +0000] "GET /etc/designs/dlg/clientlibs/commons/base/img/close-icon.png HTTP/1.1" 531 206 abcd123
[26/Jan/2014:09:47:34 +0000] "GET /etc/designs/dlg/clientlibs/commons/base/img/close-icon.png HTTP/1.1" 5991 abcd123
[26/Jan/2014:09:47:34 +0000] "GET /etc/designs/dlg/clientlibs/commons/base/img/close-icon.png HTTP/1.1" 300 abcd123

The requirement is

I need a regex pattern match which should only pick 5XX marked bold and discard any other pattern. 5XX is 500 - 599

Line - 1 Line - 2 and Line - 4 should be picked and rest should go unmatched

I thought of this
Code:
 
^.*\[(.*)\].*\"(.*)\".*(5[0-9][0-9])[^0-9].*$

But this is missing out in first and second line where the line ends with 500

Please help

Last edited by vbe; 02-07-2014 at 05:16 AM..
 

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RE_COMP(3)						     Linux Programmer's Manual							RE_COMP(3)

NAME
re_comp, re_exec - BSD regex functions SYNOPSIS
#define _REGEX_RE_COMP #include <sys/types.h> #include <regex.h> char *re_comp(char *regex); int re_exec(char *string); DESCRIPTION
re_comp() is used to compile the null-terminated regular expression pointed to by regex. The compiled pattern occupies a static area, the pattern buffer, which is overwritten by subsequent use of re_comp(). If regex is NULL, no operation is performed and the pattern buffer's contents are not altered. re_exec() is used to assess whether the null-terminated string pointed to by string matches the previously compiled regex. RETURN VALUE
re_comp() returns NULL on successful compilation of regex otherwise it returns a pointer to an appropriate error message. re_exec() returns 1 for a successful match, zero for failure. CONFORMING TO
4.3BSD. NOTES
These functions are obsolete; the functions documented in regcomp(3) should be used instead. SEE ALSO
regcomp(3), regex(7), GNU regex manual COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. GNU
1995-07-14 RE_COMP(3)
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