Section for Week 3, Thursday, 1/28/99

1.  QUIZ

2.  Go over answers to quiz.

3.  Lab Assignment #3.1:
    a) if (-e $filename) {...}  will test whether a file by that name
       exists.

    b) To open a specific file, use "open FILENAME" where $FILENAME has the
       file name, including an access indicator (> on beginning, > or >> on
       end, or | on end or beginning).

    c) To output to specific file, use: "print FILENAME 'blahblahblah'"

    d) Numeric file permissions (modes):
       r=4, w=2, x=1, added together to indicate complicated perms (so
       6=RW), given in a triple to indicate the User, Group, and World
       permissions, respectively.  

    e) To change modes, use "chmod(0700, $FILENAME)" -- returns the # of
       files for which mode was changed.  Leading zero indicates an octal
       number. 

    f) Ignore the comment on making CGI scripts exec for world.

4.  For #3.2 -- Moved to 990202.txt!!!