Passing values between shell and Perl scripts

bobdis has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: Passing Values by Aristotle (Chancellor) on Sep 06, 2002 at 15:17 UTC
`@ARGV` is your ticket. As for returning results to the script, you can either capture the Perl script's `STDOUT` or use `exit` to signal success/failure. Makeshifts last the longest.	[reply]
Re: Passing Values by krujos (Curate) on Sep 06, 2002 at 15:33 UTC
One way to do this is to call the perl script with the variable as an argument. You can then use @ARGV to get the variable and mess with it. To get it back out you can set an env variable and manipulate it in the shell script again. Good Luck. Josh	[reply]
Re: Passing Values by flounder99 (Friar) on Sep 06, 2002 at 15:53 UTC
temp.pl ---------------------- #! /usr/bin/perl print $ARGV[0] + 1; temp.sh ---------------------- #! /usr/bin/bash MYVALUE=1; NEWVALUE=`./temp.pl $MYVALUE` echo $NEWVALUE execution ---------------------- $./temp.sh 2 [download] -- flounder	[reply] [d/l]
Re: Passing Values by zentara (Cardinal) on Sep 06, 2002 at 16:01 UTC
If you mean doing this with both scripts running simultaneously, you might want to look at pipes. You can make a pipe to go from the shell script to the perl script, another pipe to return the values from the perl script to the shell script. You treat the pipes as filehandles to read and write too. In bash you can make the pipes with the mkfifo command, then call the perl script with system. The perl script should use the pipes as it's stdin and stdout. It's an alternative to running the perl script and capturing it's output. Read "perldoc -q pipe".	[reply]