Problem in tokenizing the string Post: 302631919

Sponsored Content

Top Forums Shell Programming and Scripting Problem in tokenizing the string Post 302631919 by drl on Saturday 28th of April 2012 11:18:14 AM

04-28-2012

Registered User

Hi.

Edit -- I didn't notice the embedded "=" sign, so the solution from neutronscott, q.v., is the correct one for using bash built-ins.

With bash shell built-ins:

Code:

#!/usr/bin/env bash

# @(#) s1	Demonstrate parse line into variables, bash built-in read.

# List environment for demonstration computation.
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C

line="DNS = cn=user1,o=company : pwd"
pl " Line to be parsed into variables:"
pe "$line"

oldifs="$IFS"
IFS="=:" read s u p junk <<< "$line"

pl " Results of setting variables from read:"
pe "service name: $s"
pe "UserName: $u"
pe "Password: $p"

pl " Results with all spaces eliminated with \"Parameter Expansion\":"
t1=${line// /}
pe " t1 is \"$t1\""
IFS="=:" read s u p junk <<< "$t1"
pe "service name: $s"
pe "UserName: $u"
pe "Password: $p"

IFS="$oldifs"

exit 0

producing:

Code:

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39

-----
 Line to be parsed into variables:
DNS = cn=user1,o=company : pwd

-----
 Results of setting variables from read:
service name: DNS 
UserName:  cn
Password: user1,o

-----
 Results with all spaces eliminated with "Parameter Expansion":
 t1 is "DNS=cn=user1,o=company:pwd"
service name: DNS
UserName: cn
Password: user1,o

See man bash for details.

Best wishes ... cheers, drl

Last edited by drl; 04-28-2012 at 03:36 PM..

drl

View Public Profile for drl

Find all posts by drl

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

An Idea for Tokenizing

One of the monitoring tools in Java is called `jps`, and it monitors all Java processes that are run by the user, an example output would be like this: 3459 Jps 2348 test 2311 Util where the first column represents Process IDs and the second column represents Java processes names....

2. Shell Programming and Scripting

sed problem - replacement string should be same length as matching string.

Hi guys, I hope you can help me with my problem. I have a text file that contains lines like this: 78 ANGELO -809.05 79 ANGELO2 -5,000.06 I need to find all occurences of amounts that are negative and replace them with x's 78 ANGELO xxxxxxx 79...

3. UNIX for Dummies Questions & Answers

problem with if -z string

someone please help me out here. i am not a newbie. i just haven't posted on this board in years. i'm talking at least two and a half years. My last user name was TRUEST. i couldn't log into this name because i forgot my password and my aol email address has long been deleted. anyway, i'm...

4. Programming

Problem returning string

Hi all, I have been trying with RSA encryption and decryption. I was able to write a code which worked fine. Then I split it into functions as part of a requirement. However I am not getting the expected result everytime. I know it has something to do with how I am returning but it just does not...

5. Shell Programming and Scripting

Tokenizing a String in unix

Hi All, I have String i want to tokenize based on one delimiter. Original String is -pComments.properties,-iPELF4 i want to tokenize the original string based on ',' (comma) as delimiter and collect them individually like string1=-pComments.properties string2=-iPELF4 ...

6. Shell Programming and Scripting

Runaway String Problem

Database.txt John:30:40 echo -n "New Title Please :" read NewTitle awk -F":" 'OFS = ":"{ $1 = "'$NewTitle'" ; print $0 } ' Database.txt> Database2.txt mv Database2.txt Database.txt what this does, is that when i input something into $NewTitle, it will update $1 which is "John" into...

7. Shell Programming and Scripting

string tokenizing

I have a string that looks like this: blahblahblah_^substring^_blahblahblah I need to extract substring, the bit between the ^ characters, into another string variable. This will be in a bash shell script. Thanks.

8. Shell Programming and Scripting

if PATH contains a certain string problem!

Hi I am using MKS Toolkit c shell. I want to basically check if my PATH variable already contains a certain path directory so I tried this (it didnt work!): if: Expression Syntax if ( echo $path |grep -c c:/PROGRA~1/blah/blah ) then please help me get this little statement to work. ...

9. Shell Programming and Scripting

Problem in comparing 2 files string by string

Hi Champs, I am a newbie to unix world, and I am trying to built a script which seems to be far tough to be done alone by me..... " I am having a raw csv file which contains around 50 fields..." From that file I have to grep 2 fields "A" and "B"....field "A" is to be aligned vertically...

10. Shell Programming and Scripting

Parsing a long string string problem for procmail

Hi everyone, I am working on fetchmail + procmail to filter mails and I am having problem with parsing a long line in the body of the email. Could anyone help me construct a reg exp for this string below. It needs to match exactly as this string. GetRyt...

LEARN ABOUT DEBIAN

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

Linux								       Epoch								     Linux

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

An Idea for Tokenizing

Discussion started by: neked

2. Shell Programming and Scripting

sed problem - replacement string should be same length as matching string.

Discussion started by: amangeles

3. UNIX for Dummies Questions & Answers

problem with if -z string

Discussion started by: Terrible

4. Programming

Problem returning string

Discussion started by: Treasa