runperl.bat - "universal" batch file to run perl scripts |
runperl.bat - ``universal'' batch file to run perl scripts
C:\> copy runperl.bat foo.bat C:\> foo [..runs the perl script `foo'..] C:\> foo.bat [..runs the perl script `foo'..]
This file can be copied to any file name ending in the ``.bat'' suffix. When executed on a DOS-like operating system, it will invoke the perl script of the same name, but without the ``.bat'' suffix. It will look for the script in the same directory as itself, and then in the current directory, and then search the directories in your PATH.
It relies on the exec()
operator, so you will need to make sure
that works in your perl.
This method of invoking perl scripts has some advantages over
batch-file wrappers like pl2bat.bat
: it avoids duplication
of all the code; it ensures $0
contains the same name as the
executing file, without any egregious ``.bat'' suffix; it allows
you to separate your perl scripts from the wrapper used to
run them; since the wrapper is generic, you can use symbolic
links to simply link to runperl.bat
, if you are serving your
files on a filesystem that supports that.
On the other hand, if the batch file is invoked with the ``.bat''
suffix, it does an extra exec()
. This may be a performance
issue. You can avoid this by running it without specifying
the ``.bat'' suffix.
Perl is invoked with the -x flag, so the script must contain
a #!perl
line. Any flags found on that line will be honored.
Perl is invoked with the -S flag, so it will search the PATH to find the script. This may have undesirable effects.
perl, perlwin32, pl2bat.bat
runperl.bat - "universal" batch file to run perl scripts |