Using sed to find text between a "string " and character "," Post: 302581718

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Top Forums Shell Programming and Scripting Using sed to find text between a "string " and character "," Post 302581718 by haggismn on Tuesday 13th of December 2011 11:43:39 PM

12-14-2011

Registered User

Thanks Ahamed. Can you be a little more precise with adding extra parts to the echo/awk command? The current commands are very similar as they are. I am just being introduced to awk and sed so please forgive my lack of knowledge.

Here is some sample data;

Code:

Wed Dec 14 04:41:36 2011 SENT CONTROL [server]: 'PUSH_REQUEST' (status=1)
Wed Dec 14 04:41:36 2011 PUSH: Received control message: 'PUSH_REPLY,route-gateway 197.73.129.164,redirect-gateway def1,dhcp-option DNS 208.67.220.220,dhcp-option DNS 8.8.8.8,dhcp-option DNS 208.67.222.222,route-gateway 197.73.129.164,ping 10,ping-restart 30,ifconfig 197.73.129.170 255.255.255.240'
Wed Dec 14 04:41:36 2011 OPTIONS IMPORT: timers and/or timeouts modified
Wed Dec 14 04:41:36 2011 OPTIONS IMPORT: --ifconfig/up options modified
Wed Dec 14 04:41:36 2011 OPTIONS IMPORT: route options modified
Wed Dec 14 04:41:36 2011 OPTIONS IMPORT: route-related options modified
Wed Dec 14 04:41:36 2011 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified

It is the DNS server IP's that need to be obtained.

The following creates the resolv.conf

Code:

awk '{gsub(/,/, "\n" );gsub(/DNS/, "nameserver" );}; {for(i=1;i<=NF-1;i+=3) {print ($ (i),($ (i+1)))}}' log | grep -m 3 nameserver > /tmp/etc/resolv.conf

Again your help is much appreciated.

haggismn

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shtool-subst

SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME

       shtool-subst - GNU shtool sed(1) substitution operations

SYNOPSIS

       shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
       [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]

DESCRIPTION

       This command applies one or more sed(1) substitution operations to stdin or any number of files.

OPTIONS

       The following command line options are available.

       -v, --verbose
	   Display some processing information.

       -t, --trace
	   Enable the output of the essential shell commands which are executed.

       -n, --nop
	   No operation mode. Actual execution of the essential shell commands which would be executed is suppressed.

       -w, --warning
	   Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution
	   operations resulted in no content change on all files.

       -q, --quiet
	   Suppress warning on substitution operation resulting in no content change.

       -s, --stealth
	   Stealth operation. Preserve timestamp on file.

       -i, --interactive
	   Enter interactive mode where the user has to approve each operation.

       -b, --backup ext
	   Preserve backup of original file using file name extension ext.  Default is to overwrite the original file.

       -e, --exec cmd
	   Specify sed(1) command directly.

       -f, --file cmd-file
	   Read sed(1) command from file.

EXAMPLE

	#   shell script
	shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch]

	#    RPM spec-file
	%install
	    shtool subst -v -n 
		-e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' 
		-e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' 
		`find . -name Makefile -print`
	    make install

HISTORY

       The GNU shtool subst command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 2001 for GNU shtool.  It was prompted
       by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications.

SEE ALSO

       shtool(1), sed(1).

18-Jul-2008							   shtool 2.0.8 					       SHTOOL-SUBST.TMP(1)