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Full Discussion: Insertion of Null Character while writing into file
Top Forums UNIX for Advanced & Expert Users Insertion of Null Character while writing into file Post 302582153 by issaq84mohd on Thursday 15th of December 2011 03:59:29 AM
Old 12-15-2011
Insertion of Null Character while writing into file
I have a huge file with record length around 5000 characters.
There is an ETL tool datastage which is writing this data to the file(AIX server). At position 4095 i have seen NULL Character(^@).

when i am using this command "head -1 file_nm | sed 's/\000//g'" --- the output is displaying prperly its removing NULL character but if i write this to another file its adding again.

head -1 file_nm | sed 's/\000//g' ----- Displaying Output without NULL
head -1 file_nm | sed 's/\000//g' > File_nm1 --- can see the NULL charcter in File_nm1.

I think by default AIX is inserting this NULL character for a file whose record length is huge... Is this true??

Please help me out
 

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LEARN ABOUT OPENSOLARIS

gucharmap

gnome-character-map(1)						   User Commands					    gnome-character-map(1)

NAME

       gnome-character-map, gucharmap, charmap - insert special characters into a document

SYNOPSIS

       gnome-character-map | gucharmap | charmap [--font=string] [gnome-std-options]

DESCRIPTION

       The  Character Map application enables you to select characters from a character table, then combine the characters into a text string with
       standard characters. You can insert the text string that you create into other applications, such as text editor documents.

       Character Map provides accented characters, mathematical symbols, special symbols, and punctuation marks. Many of the  characters  are  not
       available on a standard keyboard.

       Note:  The  gucharmap  application  also provides a library called libgucharmap. This library is licensed under GPL. Please see the license
       file at /usr/share/doc/SUNWgnome-character-map/COPYING.bz2 for implications when writing a program which uses this library.

OPTIONS

       The following options are supported:

       --font=string	       Specify the font name and point size that you want to use to display the characters in the  character  table,  when
			       you start Character Map.

       gnome-std-options       Standard options available for use with most GNOME applications.  See gnome-std-options(5) for more information.

EXAMPLES

       Example 1: Launching Character Map

       example% gnome-character-map

       Example 2: Launching Character Map With Specified Font Name and Point Size

       example% gnome-character-map --font="bitstream vera sans italic 20"

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       >0	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/gucharmap

	   Executable for Character Map.

       /usr/bin/charmap

	   Symbolic link to gucharmap.

       /usr/bin/gnome-character-map

	   Symbolic link to gucharmap.

       /usr/share/doc/SUNWgnome-character-map/COPYING.bz2

	   Location of license file

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-character-map	   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Volatile			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       bzip2(1), attributes(5), gnome-std-options(5)

       Character Map Manual

       Latest version of the GNOME Desktop User Guide for your platform.

       http://www.fsf.org/licensing/

NOTES

       Written by Glynn Foster, updated by Halton Huo, Sun Microsystems Inc., 2003, 2007, 2008.

SunOS 5.11							    16 Sep 2008 					    gnome-character-map(1)
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