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Full Discussion: KSH – Shell subtraction
Top Forums Shell Programming and Scripting KSH – Shell subtraction Post 302543068 by Aswex on Friday 29th of July 2011 10:12:01 AM
Old 07-29-2011
KSH – Shell subtraction
Hello

I am using a ksh shell on solaris 9.

I am looking for a way to subtract two files and get a number

The first file contains only lines
Code:
  LINE_A
  LINE_B
  LINE_C

The second file contain one number, the number of the line
Example
Code:
  1

So the idea is to substract the number of the line in the first file with the number inside the second file :

Code:
  Number_1=$(cat first_file | wc –l)
  Number_2=$(cat second_file)
  Result=(number_1 – number_2)
  Echo « $Result »


I have found this post, and the reply from "cfajohnson" works fine, but I am not sure it's the best way on KSH.


https://www.unix.com/shell-programmin...ays.html?hl=fi




Thanks for your comment and help
Last edited by radoulov; 07-29-2011 at 11:36 AM.. Reason: Code tags.
 

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LEARN ABOUT PLAN9

suspend

suspend(1)							   User Commands							suspend(1)

NAME

       suspend - shell built-in function to halt the current shell

SYNOPSIS

   sh
       suspend

   csh
       suspend

   ksh
       suspend

DESCRIPTION

   sh
       Stops the execution of the current shell (but not if it is the login shell).

   csh
       Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.

   ksh
       Stops the execution of the current shell (but not if it is the login shell).

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)

SunOS 5.10							    15 Apr 1994 							suspend(1)
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