Identify empty file with null record Post: 302976511

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If statement falling over on a null record. Help please.

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To find record having null value

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Parsing null or empty output

I am working an some if then statements for a script. I want to be able to check for alpha characters or empty out put then exit out. if ]]; echo "Serial Number Invaild" then exit 3; How do I account if the output is empty or null in this in this statement. Many thanks

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)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

If statement falling over on a null record. Help please.

Discussion started by: TonyR

2. Shell Programming and Scripting

identify the empty directories

Discussion started by: mohan705

3. Shell Programming and Scripting

How to check for null or empty string

Discussion started by: doer

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Table null is empty

Discussion started by: priyanka3006