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#!/usr/bin/perl -sw
use strict;
use warnings;
use Getopt::Long;
my $remote = 0;
my $test = 0;
GetOptions ('remote' => \$remote, 'test' => \$test);
print "$remote:$test\n";
perl test.pl --remote --test
The above prints "0:0". I am new to Perl so I have been unable to determine why this isn't working.
I also ran the "Simple Options" section from http://perldoc.perl.org/Getopt/Long.html#Simple-options and that didn't produce anything either.
618
We can use the getopts program/ command to parse the arguments passed to the script in the command line/ terminal by using loops and switch-case statements. Using getopts, we can assign the positional arguments/ parameters from the command line to the bash variables directly.
The getopt() function is a builtin function in C and is used to parse command line arguments. Syntax: getopt(int argc, char *const argv[], const char *optstring) optstring is simply a list of characters, each representing a single character option.
The arguments which are passed by the user or programmer to the main() method are termed as Command-Line Arguments. main() method is the entry point of execution of a program. main() method accepts an array of strings.
The special character $# stores the total number of arguments. We also have $@ and $* as wildcard characters which are used to denote all the arguments. We use $$ to find the process ID of the current shell script, while $? can be used to print the exit code for our script.
I believe the -s command line option you include on your she-bang line is biting you. According to the perlrun documentation, the -s command line option:
enables rudimentary switch parsing for switches on the command line after the program name but before any filename arguments (or before an argument of --).
If you remove that option, things should work as you expect. I would also recommend removing the -w since you are already using the use warnings directive (the use warnings directive is much more fully featured, essentially replacing the -w option).
So, long story short, make your first line:
#!/usr/bin/perl
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