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Full Discussion: Help with awk/shell script needed!
Top Forums Shell Programming and Scripting Help with awk/shell script needed! Post 302127593 by inditopgun on Wednesday 18th of July 2007 05:31:11 PM
Old 07-18-2007
Help with awk/shell script needed!
I have a shell script which reads a file named filelist.txt, containing a list of fully qualified filenames (with complete path), and then does some processing based on the file extension. In order to do the processing, I have to know the file extension, the filename without extension and just the filename_with_extension(excluding the full path)

some sample lines in the filelist.txt looks like this
/home/johndoe/test/a.java
/home/rwilliams/test2/b.xml

My script looks like below (basically I am using awk and relying on "." to give me the extension and filename_without_extension

#!/bin/sh

for cfilename in `cat filelist.txt`
do
file_extension=`echo $cfilename | awk -F\/ '{print $NF}' | awk -F. '{print $NF}'`
export file_extension
filename_wo_ext=`echo $cfilename | awk -F\/ '{print $NF}' | awk -F. '{print $1}'`
export filename_wo_ext
filename_with_ext=$filename.$file_extension
export filename_with_ext
<processing logic>
done

The problem is this script works fine for normal files with names like /home/johndoe/test/a.java
however whenever I encounter files with names like /home/john.doe/test/abcd.efgh.ijkl.mnop.qrst.xml
the script throws up as it relies heavily on the "." character embedded in the name to be the separator between the extension and filename.

Any help will be really appreciated!
 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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