## Exercise 3

 1. Write a C program that prints the groups of the current «user»
    (not the current process, i.e. not what ‹getgroups› does).
 2. You can either use ‹getgrent› and iterate, or you can use
    ‹getgrouplist›.  However, you should know that the latter is not
    part of POSIX.
 3. You will also need ‹getuid› and ‹getpwuid›.
 4. Recall that strings in C are compared using the function
    ‹strcmp›.

That's all for today. Follows homework, in ‹hw.txt›.
