Solved

How would I shell out to exec a OS command...

Posted on 1998-06-12
12
219 Views
Last Modified: 2008-03-06
Here is what I want to do:  A user can log in through the internet and then enter their name and a fax number.  Then they hit a 'submit' button, and a fax gets sent to the number they entered.   How can I do this?  Is Java even the right thing to use?  Any place where I can get source code?

Thanks
0
Comment
Question by:kellyjj
  • 8
  • 4
12 Comments
 
LVL 4

Expert Comment

by:evijay
ID: 1222972
You have to write a server side CGI program (in java or in C or in Perl or in any other language) which gets executed when the user clicks submit button.
0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222973
So I can write it C?  Cool, ok but What do I need to know to make a C program a CGI??  
0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222974
So I can write it C?  Cool, ok but What do I need to know to make a C program a CGI??  
0
Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

 
LVL 2

Author Comment

by:kellyjj
ID: 1222975
So I can write it C?  Cool, ok but What do I need to know to make a C program a CGI??  
0
 
LVL 4

Expert Comment

by:evijay
ID: 1222976
I am sorry for late reply,.

First you need to write a html form which accepts the user inputs. Next, attach a cgi handler for the submit
button. The template is like this

<Form method=get action="http://yourhostname/cgi-bin/cgicprogram">

. put form elements here

</Form>


Write your cgicprogram say faxit.c.
It should first get the user entered details from environment variables (using getenv and the variable name is QUERY_STRING,
parse it and then process the request).

For more info on cgi , see the following book

http://www.developer.com/reference/library/1575211513/ewtoc.html


0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222977
ok cool.  Lets say inside faxit.c  I have the statement system("echo 123 >123.txt");

Will this write 123 to the file 123.txt??  Or is this kind of thing allowed.
0
 
LVL 4

Expert Comment

by:evijay
ID: 1222978
Yes perfectly allowed and it writes to file 123.txt

0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222979
ok, dude,  answer a question and the points are yours
0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222980
ok, here is another thought...  I can call another app from inside my CGI? Correct.  This what happens when you send e mail from a form.  What do I have to do make this happen.  I keep getting the,  invalid header.

Thanks
0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222981
Here is the actual error msg that is logged in our server.  What do I do to fix this?

15/Jun/1998:10:34:39] failure: for host 207.126.81.68 trying to GET /cgi-bin/faxcgi.cgi, cgi-parse-output reports: the CGI program /usr/internet/ns_httpd/httpd-80/htdocs/cgi-bin/faxcgi.cgi did not produce a valid header (name without value: got line "vsifax environment not set")

Thanks dude/dudette.
0
 
LVL 2

Author Comment

by:kellyjj
ID: 1222982
actually,  I got to work.  So if you want the points you should post an answer.

kellyjj
0
 
LVL 4

Accepted Solution

by:
evijay earned 30 total points
ID: 1222983
Sorry, I was out of station !!


            First you need to write a html form which accepts the user inputs. Next, attach a cgi handler for the submit
            button. The template is like this

            <Form method=get action="http://yourhostname/cgi-bin/cgicprogram">

            . put form elements here

            </Form>


            Write your cgicprogram say faxit.c.
            It should first get the user entered details from environment variables (using getenv and the variable name is
            QUERY_STRING,
            parse it and then process the request).

            For more info on cgi , see the following book

            http://www.developer.com/reference/library/1575211513/ewtoc.html 
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
The viewer will learn how to implement Singleton Design Pattern in Java.
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

792 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question