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Full Discussion: how to declare variable in perl
Top Forums Shell Programming and Scripting how to declare variable in perl Post 302691023 by learnbash on Thursday 23rd of August 2012 06:37:29 PM
Old 08-23-2012
please check below code is it true.

Code:

foreach( </sys/block/emcpow*> )
{

 system("echo "noop"", "$_");
}

---------- Post updated at 04:55 PM ---------- Previous update was at 04:53 PM ----------

Another code in perl is correct please confirm

Code:
foreach( </sys/block/emcpow*> )
{
        blockdev --setra 16384 $_;
}

---------- Post updated at 05:24 PM ---------- Previous update was at 04:55 PM ----------

sir it is giving error

BLKRASET: Inappropriate ioctl for device when running below perl code.




Quote:
Originally Posted by Corona688
That's not even how you declare a variable in shell... I think you mean, how do you *-globbing in perl.

Code:
foreach( </sys/block/emcpow*> )
{
        system("blockdev --setra 16384 $_");
}

Just one thing to realize: system() runs a shell exactly like the shell the scripts I already showed you ran in.

So you are not running perl instead of shell. You're running lots and lots of shells, with a tiny topping of pointless perl. (Sorry, it's a peeve of mine.)
---------- Post updated at 05:37 PM ---------- Previous update was at 05:24 PM ----------

Please correct this

Code:
        system("echo "noop" > $_");

 

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LEARN ABOUT DEBIAN

dh_consoledata

DH_CONSOLEDATA(1)					User Contributed Perl Documentation					 DH_CONSOLEDATA(1)

NAME

       dh_consoledata - declare console data files

SYNOPSIS

	 dh_consoledata [debhelper options] [-n]

DESCRIPTION

       This program is meant to assist in building a package that provides data files for the console.	It is still in the early stages of
       developement, and many features are still missing or partly implemented.  Please look at /usr/share/doc/console-common/TODO for more
       details.

       For now this program takes a debian/package.keymaps file, installs in in the package build directory, and creates the debian/package.config
       and debian/package.templates files.

       It also makes the ${console:depends} variable available for the control file.  This variable should be referenced in the Depends field, as
       should ${perl:depends} if you use dh_perl (which you should call anyway, since your package will include a perl debconf script).

       It should ultimately allow to declare fonts and SFM fallbacks.

OPTIONS

       -n, --noscripts
	   Do not modify postinst/postrm scripts.

       -d  Install the debconf templates and config script (and add the postinst fragment, unless -n is also specified), even if there is no
	   debian/package.keymaps file.  This is normally intended for internal use, be careful that the name of the option and its semantics will
	   probably change in the near future, to accomodate for new needs.

SEE ALSO

       debhelper(1)

       This program is an extention to debhelper.

AUTHOR

       Yann Dirson <dirson@debian.org>

perl v5.14.2							    2011-12-05							 DH_CONSOLEDATA(1)
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