Listing 3: Sample output

Usual compile:
cc -o checkfor checkfor.c

Sample output:

myaccnt@this.machine.com
myaccnt@that.machine.com
myaccnt@other.machine.com  End of forwarding chain.
newacct@that.machine.com
myaccnt@this.machine.com  Duplicate user/hostname combination!

Finished.


Command line invocation:

this.machine.com:/home/myaccnt> checkfor myaccnt@this.machine.com


Standard input invocation:

this.machine.com:/home/myaccnt> cat userdata | checkfor -s


Contents of userdata:
myaccnt this.machine.com
othracct that.machine.com