Text to command line

Thread View: comp.unix.shell

2 messages

[T] Back to Threads [V] Tree View [G] Group Articles

2 total messages Started by John Malia Tue, 30 Oct 1990 18:38

#1673

Author: John Malia
Date: Tue, 30 Oct 1990 18:38

28 lines
1312 bytes

I'm not sure if this is where this question belongs, but, here goes...

Is there a way to have text that redies in a file be transferred to the 
command line (ei. I'm running tcsh, if that makes any difference), so
it may be executed?

For instance, in my .xinitrc file, (definitions file for starting X),
I have the following line:


	/usr/bin/X11/xterm -geometry 125x35+220+175 -fn 8x13 +ls -sb -n Rn 
	-iconic -e rn &

I wanted to know if somehow, this line can be read and put on the command
line for execution from the shell.

I know, Bizarre question huh.


Thanks,


John  88-{Q
--
                    Solbourne Computers  | There's no place, anything like this
 John Malia ::-{Q   1900 Pike Rd.        | place, anywhere near this place,
                    Longmont, Co,. 80501 | ...so this must be the place!
********* What I say is what *I* think, not what Solbourne thinks  *******

Re: Text to command line

#1679

Author: Jonathan I. Kamens
Date: Tue, 30 Oct 1990 20:24

54 lines
2018 bytes

In article <1990Oct30.183840.11819@Solbourne.COM>, johnm@Solbourne.COM (John Malia) writes:
|> Is there a way to have text that redies in a file be transferred to the 
|> command line (ei. I'm running tcsh, if that makes any difference), so
|> it may be executed?

Use backquotes for command evaluation substitution, and cat the contents of
the file:

	% cat test
	echo frep
	% eval `cat test`
	frep

If you only want to execute one line from the file, use grep or sed to select
the correct line:

	% cat test
	echo frep
	echo foobar
	% eval `sed -n 2p test`
	foobar

Finally, you can put the entire file into your command history using "source
-h":

	% cat test
	echo frep
	echo foobar
	% history 5
	   115          eval `sed -n 2p test`
	   116          man history
	   117          dirs
	   118          cat test
	   119          history 5
	% source -h test
	% history 5
	   119          history 5
	   120          source -h test
	   121          echo frep
	   122          echo foobar
	   123          history 5
	% !121
	echo frep
	frep

Note that you have to use "eval" in the first two examples I posted above,
because of brain-damage in tcsh with deciding when to break up strings into
words (the same reason why "kill `cat list-of-PIDS`" doesn't work).

-- 
Jonathan Kamens			              USnail:
MIT Project Athena				11 Ashford Terrace
jik@Athena.MIT.EDU				Allston, MA  02134
Office: 617-253-8085			      Home: 617-782-0710

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads