To add interactivity to your site, you
might want to implement scripts (shell, C, or perl) on your site. Many
scripts are freely available throughout the web and through other
resources. However, there are several parameters which need to be set to
enable the scripts to run.
Most of these scripts come with
extensive documentation. The documentation describes the configuration
certain lines in the script itself to enable it to work on your particular
host machine, and often needs to know the location of certain programs on
the server. The following information will be required:
- Location of perl:
This appears on the very first
line of your perl script.
- Location of
sendmail wrapper: /usr/bin/sendmail
- Upload location:
Put your scripts in
- Call for script:
This must be the call
for your particular script from the page that calls it.
- Setting Permissions
Once your script is uploaded,
it must be set so you can run it. There are different ways of achieving
this. If you are using an FTP program such as WS FTP, select the uploaded
file, and right click it. Then select chmod UNIX from the menu, and then
a dialog box will pop up with permissions. Click the checkboxes to select
permissions as shown in Figure 1.
- Owner: That is
you. You want to be able to read, write, and execute this script.
Group: In Unix,
the group is traditionally users you share files with. On this server, it
is our other customers who have accouts on this machine. You don't want
them to be able to write to your script.
Other: In Unix,
this is 'the rest of the world.' This includes the httpd's unpriviledged
user, "nobody" who reads and serves web pages to the rest of the
world. They, too, should not be able to write to the script.
Setting Permissions From The
The other way to set
permissions (chmod) is to log into your shell account, go into the
directory your perl script is in (public_html/cgi-bin) and then type the
Other Files Associated With
Your script might write to an
actual page on your site. If that is the case, you will need to set
permissions to that particular file so you can write to it, as
well as read and execute it. Such files should be set 755 if you want web
visitors to be able to read them, 700 otherwise. Setting them world or
group writable is not required, thanks to our cgi wrapper. Most script
documentation that states to make files world writable may be
ignored. A word to the wise: Not all scripts are
well-documented. If you are having trouble getting a script to run, check
your permissions and determine if the script is writing to another file,
and whether or not the directory the file needs to be in actually
exists. Also, a few scripts, regrettably, are confused by wrappers, and
may need reprogramming.
Again, in WSFTP, right click on
the uploaded file, select CHMOD (Unix) and click the appropriate
checkboxes in the dialog box.
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