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Full Discussion: How to check for Input Redirection in my script?
Top Forums Shell Programming and Scripting How to check for Input Redirection in my script? Post 302408480 by bharath.gct on Monday 29th of March 2010 03:42:23 PM
Old 03-29-2010
Thanks bakunin for the detailed explanation. Below ismy requirement.

I currently have my script written only to accept user inputs (which obviously has many echoes and is constantly relying on the terminal input by user). Now i am trying to add the Input from file functionality also to it (where I would want the script to run with no echoes and terminal inputs, more like a script silently running on the background taking the inputs from the file). Which is why I need to find the rediection flag so that I can handle both of the scenarios differently.

The one way I could think of now, is using the filename as an argument and checking for argument count. Based ona rg count, I handle each case seperately.

Let me know if there is a better approach.

Sincerely appreciate your comments.

thanks again,
Bharath
 

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LEARN ABOUT SUNOS

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 5.10							    30 Jan 2004 							 script(1)
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