Re: simple scripts made difficult? :)

["Oliver Elphick" <olly@lfix.co.uk>]

andrej hocevar wrote:
  >hello
  >i'm just begining to write very simple scripts and came along these two
  >problems.
  >i) how do i (re)direct an output to a file and at the same time see
  >it as usual on screen?

some_command | tee filename

You can also use script to capture an entire session.

  >ii) how do i pass a simple argument from a file or an output to a script
  >that's just testing it, eg. a file has two arguments, now i want to pass
  >it to a script that takes the first one and echoes it on screen?

In the script, the command line parameters are $1, $2, etc.  The output
of a command can be put into a command line by using backquotes or $():

  myscript `mycommand_that_outputs_two_words`

Then the script:

#!/bin/bash
# myscript  --  echoes the first argument
if [ -z "$1" ]
then
	echo No arguments supplied"
	exit 1
else
	echo $1
fi


-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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