CGS3993, Spring 1999, Assignment 6

Due Thursday 4/8 at the start of class.

Please upload the scripts using the
~downeyt/public/bin/webftp.pl
script from mongoose. Hand in printouts of the scripts in class.

Create a link for each of these on your server's page.

1. Create a script that will upload a file from the user's computer to your mongoose account.
   • Use the CGI module to parse the query string
     
     use CGI;
     $query = new CGI;
     
   • Give the user the choices of leaving the file unchanged, changing the file to all upper case letters, or changing the file to all lower case letters. Make the choice sticky.
   • Give the user the choice of displaying the file on screen, or saving it to the hw6files directory. Make the choice sticky.
   • Report an error if the file cannot be opened.
   • Have a link on the form that will take the user to the hw6files directory. The user should be able to see the directory index of this directory.
     
2. Copy the script  from part 1 to your public_html/cgi-bin directory and have two links to it: one that uses cgiwrap and one that doesn't. The script should be able to upload the file if it uses cgiwrap, but it should fail if cgiwrap is not used.
   • Create a directory in your login directory named public_html. Make the directory accessible from the web.
   • Create a subdirectory of public_html named cgi-bin. Make this directory rwx only for you.
   • Copy your script file to this directory.
   • Create a link to the script in this directory: http://mongoose.aul.fiu.edu/cgi-bin/cgiwrap/~your-login-name/your-script-name
   • Create a link that doesn't use cgiwrap:
     http://mongoose.aul.fiu.edu/~your-login-name/cgi-bin/your-script-name
     
3. Create a script that will do server push. Use the command ps -agux to get the following information
   • The total number of processes.
   • The number of hours, minutes, seconds, and hundreths of seconds that the processes have used.
   • The percent of the CPU that is being utilized by these processes
   • Update the page every 5 seconds
     
     The ps command will display the following

     USER PID %CPU %MEM SZ RSS TT S START TIME COMMAND
     

     
     Use the split command to put each line of the output into an array, then use the split command again to split each line into separate fields. Notice that the TIME field will be in the format 0:00 for seconds and hundredths, but it is not always in position 0 in the array: if START is of the format 12:34:34 then TIME will be in position 9, if START is of the format Mar 28 then TIME will be in position 10. Use a regular expression to test the format of position 8 to determine where TIME is.