Process/Syscall matrix
======================

System calls in this system:
	process management:	exit, waitpid, fork, exec, kill
	i/o:			read	write
	information:		getpid	getppid	gettime	getprio
	other:			sleep, setprio

There is also a "bogus" system call which attempts to use an invalid
system call code; this should be caught by the syscall handler and
the process should be terminated.

These are the system calls which are used in each of the user-level
main functions.  Some main functions only invoke certain system calls
when given specific command-line arguments.

Note that some system calls are nested inside library functions - e.g.,
cwrite*() and swrite*() perform write(), etc.

    progABC runs for userA, userB, and userC
    progDE  runs for userD and userE
    progFG  runs for userF and userG
    progKL  runs for userK and userL
    progMN  runs for userM and userN
    progTUV runs for userT, userU, and userV
    all others run individual main functions

                       baseline system calls in use
prog   ext  wtp  for  exe  rea  wrt  gpi  gpp  gti  kil  slp  gtp  stp  bog
-----  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
init    .    X    .    .    .    X    .    .    .    .    .    .    .    .
idle    X    .    .    .    .    X    X    .    X    .    .    X    X    .
shell   X    X    X    X    X    X    .    .    .    .    .    .    .    .
-----  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---  ---
abc     X    .    .    .    .    X    .    .    .    .    .    .    .    .
de      .    .    .    .    .    X    .    .    .    .    .    .    .    .
fg      X    .    .    .    .    X    .    .    .    .    X    .    .    .
h       X    .    X    X    .    X    .    .    .    .    X    .    .    .
i       X    X    X    X    .    X    .    .    .    X    X    .    .    .
j       X    .    X    X    .    X    .    .    .    .    .    .    .    .
kl      X    .    X    X    .    X    .    .    .    .    X    .    .    .
mn      X    .    X    X    .    X    .    .    .    .    .    .    .    .
p       X    .    .    .    .    X    .    .    X    .    X    .    .    .
q       X    .    .    .    .    X    .    .    .    .    .    .    .    X
r       X    .    X    .    .    X    X    X    .    .    X    .    .    .
s       X    .    .    .    .    X    .    .    .    .    X    .    .    .
tuv     X    X    X    X    .    X    .    .    .    X    X    .    .    .
w       X    .    .    .    .    X    X    .    X    .    X    .    .    .
x       X    .    .    .    .    X    .    .    .    .    .    .    .    .
y       X    .    .    .    .    X    X    .    .    .    X    .    .    .
z       X    .    .    .    .    X    X    .    .    .    X    .    .    .
...........................................................................