Cody Boone Ferguson
826a6eb01a
It should be 'Location of winning authors' (as it is now) but by mistake
there was an extra space ('Location of winning authors'). Obviously
this is a huge commit as every html file with a menu (almost all) had to
be updated.
To build:
make all
```
## To use:
``` <!---sh-->
./wall
# enter some numbers
./wall | some_command
# enter some strings or numbers, depending on command
Try:
./try.sh
You may of course run the commands manually and enter text as you wish. For instance you might try one or both of:
./wall | bc
./wall | cat
and enter some input like:
x*x
2^x
quit # for the cat version
which the script does through a pipeline except that here you can enter more text if you wish, line by line.
Judges' remarks:
What we found amazing was how the flow of control was transferred between
subroutines. Careful inspection will show that the array of pointers to
functions named vi refers to functions which seem to not be directly called.
Even so, these pointers to functions are being used as an argument to
signal(3) (used both with and without an arg - but how?). Can you determine
why this is being done and how it is being exploited?
Some compilers complained about this file, so we changed: =++I to = ++I.
Author's remarks:
No remarks were provided by the author.