ASIC/FPGA Design and Verification Out Source Services

This page shows how to change the default bash internal field space separator.

1. I needed to start a script with a single parameter. The parameter is stored in a file. Each line in the input file, is a single parameter.


2. The file looks like this:
   
   -rw-r--r-- 1 pini pini 5186 May 23 20:57 tlc_tb.vhd
   -rw-r--r-- 1 pini pini 3001 May 23 20:57 tlc.vhd
   -rw-r--r-- 1 pini pini 22 May 23 21:32 a.do
   -rw-r--r-- 1 pini pini 670 May 23 21:32 a.vcd
   -rw-r--r-- 1 pini pini 208 May 23 21:33 a.sav
   -rw-r--r-- 1 pini pini 1276 May 23 21:34 simili.lst
   -rw-r--r-- 1 pini pini 142 May 23 21:34 readme.txt
   


3. To my surprise, when using for f loop, it invoked the script with each word, separated by spaces, in every line. Since I wanted each line to be a single parameter, to the script, I needed to change the default IFS of bash.


4. This can be done by:
   
   #change the default.
   OIFS="$IFS"
   IFS=$'\n'
   
   for f in `cat 1`; do echo "$f"; done
   
   #returns to default
   IFS="$OIFS"
   

Home

How to extract one version back from svn on given file list. How to recursively do a svn log on all files.

Download Area