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Full Discussion: Null Character Handling
Top Forums Shell Programming and Scripting Null Character Handling Post 302138030 by npk2210 on Friday 28th of September 2007 09:48:37 AM
Old 09-28-2007
Null Character Handling
Hi All,

I have a problem with Null values while reading line by line from a text file. I wrote a shell script to read set of file names from a text file line by line, and zipping the each individual file and copying those zip files into some separate directory, and removing the original file from current directory. My shell script is as follows

#!/usr/bin/ksh
cat OCloader_gdlfiles/loaded_gdl_archive_file_list.txt | while read LINE
do
zip OCloader_archive/gdl_loaded/$LINE.zip OCloader_gdlfiles/$LINE
rm OCloader_gdlfiles/$LINE
done


Note:- Here OCloader_gdlfiles is a soft link to some other directory in unix box.

Now my problem was, Suppose while reading the lines from the text file, if any null input is assigned to the LINE variable then the rm command is as follows

rm OCloader_gdlfiles/NULL

then the corresponding soft link is removing from the unix box. To avoid this how should i change my code. I don't have any idea to do this. Your help will be appriciated.
 

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LEARN ABOUT CENTOS

rnano

RNANO(1)						      General Commands Manual							  RNANO(1)

NAME

       rnano - Restricted mode for Nano's ANOther editor, an enhanced free Pico clone

SYNOPSIS

       rnano [OPTIONS] [[+LINE,COLUMN] FILE]...

DESCRIPTION

       This manual page briefly documents the rnano command.

       nano is a small, free and friendly editor which aims to replace Pico, the default editor included in the non-free Pine package. Rather than
       just copying Pico's look and feel, nano also implements some missing (or disabled by  default)  features  in  Pico,  such  as  "search  and
       replace" and "go to line and column number".

       rnano  is  a  restricted  version of nano, which only edits specific files and doesn't allow the user access to the filesystem or a command
       shell.

       In restricted mode, nano will not:

       o read or write to any file not specified on the command line;

       o read any nanorc files;

       o allow suspending;

       o allow a file to be appended to, prepended to, or saved under a different name;

       o use backup files or spell checking.

OPTIONS

       +LINE,COLUMN
	      Places cursor at line number LINE and column number COLUMN (at least one of which must be specified)  on	startup,  instead  of  the
	      default of line 1, column 1.

       -?     Same as -h (--help).

       -h (--help)
	      Show a summary of command line options and exit.

       -V (--version)
	      Show the current version number and exit.

       See the nano(1) manpage for the complete documentation of nano.

BUGS

       Please send any comments or bug reports to nano@nano-editor.org.

       The nano mailing list is available from nano-devel@gnu.org.

       To subscribe, email to nano-devel-request@gnu.org with a subject of "subscribe".

HOMEPAGE

       http://www.nano-editor.org/

AUTHOR

       Chris  Allegretta  <chrisa@asty.org>,  et  al  (see  AUTHORS  for  details).   This  manual  page was originally written by Thijs Kinkhorst
       <thijs@kinkhorst.com>, for the Debian system (but may be used by others).

August 23, 2007 						   version 2.0.0							  RNANO(1)
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