grep on string and printing line after until another string has been found Post: 302541245

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Top Forums Shell Programming and Scripting grep on string and printing line after until another string has been found Post 302541245 by rxc23816 on Saturday 23rd of July 2011 09:20:59 AM

07-23-2011

Registered User

grep on string and printing line after until another string has been found

Hello Everyone,

I just started scripting this week. I have no background in programming or scripting.

I'm working on a script to grep for a variable in a log file

Heres what the log file looks like. The x's are all random clutter

xxxxxxxxxxxxxxxxxxxxx START: xxxxxxxxxxxx ACTNUMBER=1234xxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxx FINISH:

I declared ACTNUMBER as a variable $ACTNUMBER

Basically the user will open a file and grep for the ACTNUMBER.
I've gotten as far as getting the file open with exec.

What I want the script to do is to grep for the ACTNUMBER and only print the line (with echo) if the line contains a START and the ACTNUMBER. I also want the script to echo all the data in the lines after until it reaches the word FINISH

I'm looking for the results in a numbered format output to display, with a carriage return between the results.

There's a twist though. Sometimes theres a nested START and FINISH within a START and FINISH and I need to have the script look for that as well. So it it finds two STARTS then find two ENDS. So if it finds one START, look for another START, if it finds another START look for two FINISH's.

I know grep only does one line at a time,
so if i do a grep -n START | grep -n ACTNUMBER=$ACTNUMBER
it will output lines with both the START and ACTNUMBER, and I need to get it to print all the lines after until it finds the line that read FINISH.

So what I need it to do is look for a START and ACTNUMBER. If it finds it then echo that particular line. Then search next line, even if it doesnt find it, to print that line, and the next, and if it reaches a FINISH, print the line, then start loop over.

I have a feeling some counters might be involved here but I'm really not sure how to implement this.

Thanks so much for any input and ideas on this.

rxc23816

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LEARN ABOUT SUNOS

gzegrep

GZGREP(1)						      General Commands Manual							 GZGREP(1)

NAME

       gzgrep, gzegrep, gzfgrep - search possibly compressed files for a regular expression

SYNOPSIS

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

DESCRIPTION

       gzgrep is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep.  If no file is speci-
       fied, 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  gzgrep  is  invoked as gzegrep or gzfgrep then egrep or fgrep is used instead of grep.  If the GREP environment variable is set, gzgrep
       uses it as the grep program to be invoked. For example:

	   for sh:  GREP=fgrep	gzgrep string files
	   for csh: (setenv GREP fgrep; gzgrep string files)

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), egrep(1), fgrep(1), gzdiff(1), gzmore(1), gznew(1), gzforce(1), gzip(1), gzexe(1)

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWgzip	      |
       +--------------------+-----------------+
       |Interface Stability | External	      |
       +--------------------+-----------------+
NOTES

       Source for gzip is available in the SUNWgzipS package.

																	 GZGREP(1)