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Full Discussion: Mixing Perl with Bash
Top Forums Shell Programming and Scripting Mixing Perl with Bash Post 302273290 by kermit on Saturday 3rd of January 2009 07:59:01 PM
Old 01-03-2009
Mixing Perl with Bash
I am fiddling with a little script that will issue a shutdown command if the temperature on the CPU goes above a certain level. I started writing the script in Bash, and then thought I would like to use Perl to extract the detailed bits, but I am not sure if this is really practical. Basically I want to parse the input a little better, but I am a bit of a novice at both Bash and Perl. I know how to extract what I want with Perl, but not so much with Bash. I know how to get the raw data with Bash, but I don't know how best to get that data to Perl, and then back as a variable to Bash so it can decide whether to leave the machine running, or issue a shutdown command. I wrote the first bit of the Bash script, which was relatively simple, but now I am at a standstill as I don't know how to bring Perl into the picture. Would my best bet be to write the 'raw data' to a file, and then call a separate Perl script, have it alter the file data as necessary, then read in the newly parsed data (in Bash) and act on that? Here is what I have gotten so far:

Code:
#!/bin/bash

cur_tmp= sensors | grep 'CPU Temp:' \
        | awk '{ print $3 }' \

 

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LEARN ABOUT CENTOS

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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