need help to passing argument to executable and get return the result

ashwani has asked for the wisdom of the Perl Monks concerning the following question:

hi monks,
i just started learning perl and i'm trying to make an application. and i'm stuck to proceed.
well my requirement is
a simple cgi script having a html page contain a text box and button.
there is one more application hello.pl
when i pass a value in text box and press button then this cgi script should pass this textbox value to hello.pl
hello.pl should accept that value and should prepare this

<greet>//here text box value//</greet>
[download]

and hello.pl should return this to cgi script which should show that
text box ,button and that return value below the button.
if i made executable of hello.pl using pdk
then i'm stuck at how to pass that value to hello.exe and
how can i get that return value in cgi and can proceed.
i need to done it.
Thanks in Advance

Comment on need help to passing argument to executable and get return the result Download Code

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Re: need help to passing argument to executable and get return the result by TedPride (Priest) on Aug 19, 2006 at 07:35 UTC
You can call an executable installed on your system by using `script path`, and you can pass it a value by doing `script path arguments`. The script (if it's Perl) can then access these arguments the regular way, through @ARGV, and print a result, and you should be able to access the result if you did $var = `script path arguments`. I'll go test this now and see if my memory works properly :) ## print.pl my $arguments = 'beep'; my $var = `perl process.pl $arguments`; print $var; [download] `## process.pl my $var = shift @ARGV; $var = uc($var); print $var;` [download] If I do `perl print.pl`, I get the result `BEEP`, which means it's passing back and forth properly.	[reply] [d/l] [select]
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Re: need help to passing argument to executable and get return the result by jeanluca (Deacon) on Aug 19, 2006 at 07:55 UTC
You can do it like `open (IN,"\| hellop.pl $my_value") or ...... ; my @retvals = <IN> ; # or do it with a while(<IN>){} close IN ;` [download] hello.pl can access the value via $ARGV[0] But be careful with processing user input! For example, what if $my_value contains '10 \| rm -rf /' ( maybe the '\|' should be a ';', I don't know, but I'm not a hacker) Than you can as well do @retvals = `hello.pl $my_value` I think you see the poin! LuCa	[reply] [d/l] [select]
Re^2: need help to passing argument to executable and get return the result by jeanluca (Deacon) on Aug 19, 2006 at 09:15 UTC
see the CGI manual, the example are really good!! LuCa	[reply]
Re^3: need help to passing argument to executable and get return the result by ashwani (Initiate) on Aug 19, 2006 at 12:35 UTC
Thanks luca.. now tell me can i do this `my $q=$ARGV[0]; my $offset=$ARGV[1];` [download] if i'm passing two arguments Thanks	[reply] [d/l]
Re^4: need help to passing argument to executable and get return the result by Fletch (Bishop) on Aug 19, 2006 at 13:19 UTC
Re^4: need help to passing argument to executable and get return the result by jeanluca (Deacon) on Aug 19, 2006 at 14:26 UTC
Re^2: need help to passing argument to executable and get return the result by ashwani (Initiate) on Aug 19, 2006 at 08:33 UTC
thanks LuCa... but i could not get how can i access the textbox value in print.pl as tedpride say. i said there is print.pl or print.cgi having html code and showing textbox so how will this print.cgi get that textbox value. ted pride give hardcode value. if you know `cgi->param('q')` i need to know about that. thanks	[reply] [d/l]