On Sat, Feb 7, 2009 at 08:59, pouliakhina <pouliakh...@gmail.com> wrote:
> Hello,
>
> I try to write the name of the current directory in $x:
>
> $x = system ("pwd");
>
> But it doesn't work. It also doesn't work in all these combinations:
>
> $x = 'system("pwd")';
> $x = system("`pwd`");
>
> Can You help me to write the result of 'pwd' in $x?
snip
This is because the system function* does not return the stdout of the
program being run. You might be looking for the qx// operator** (also
known as backticks or ``):
my $pwd = qx{pwd};
But that is not a good idea***. You really want is the getcwd
function from the Cwd module****:
use Cwd;
my $pwd = getcwd();
It is part of Core Perl, so, unless your version of Perl is broken, it
will exist on any box Perl is installed on.
* http://perldoc.perl.org/functions/system.html
** http://perldoc.perl.org/perlop.html#Quote-and-Quote-like-Operators
*** calling external programs to do things that can be done in Perl is
fragile (OS dependent, the error checking is harder, etc.)
**** http://perldoc.perl.org/Cwd.html
--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
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