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Full Discussion: Read numbers from file
Top Forums Shell Programming and Scripting Read numbers from file Post 302805455 by vish6251 on Friday 10th of May 2013 06:01:40 AM
Old 05-10-2013
Quote:
Originally Posted by Don Cragun
You said you want the read commands to read from a file, but you haven't specified any file. Therefore, both read commands will read from the standard input for your bash script. In other words, the script is waiting for you to type in values to be processed.

If you want to choose a different file each time you run the script, you can redirect the input of your script when you run it, as in:
Code:
script_name < input_file

If you always want the read command in your script to read from the same file every time you run the script, change the line marked in red in your script above with:
Code:
done < input_file

I knew i had to specify a file, then i tried adding "num=$1" that didn't work. But your suggestion worked perfectly! thank you!
 

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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)
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