The command should require an already existing file and just append the processes output to specified file.
FAILS IF FILE DOES NOT EXIST

ONLY ENABLED FOR SHELL SCRIPTS
ignores rest of line when '#' is encountered
when '#' is attached to word just treat as normal character.

Jake gave me the tip that it is easier to do this if '#' is not a 'metacharacter'

Basic vertical pipe (done)
Make pipe work with file redirection (done)
New bugs will be reported as separate issues.

when !$ is entered, the last word of the previous statement shall replace it

p2 ~cs570/Data4/input21

What was sent to stdout was:
%1% %2%
Your shell did not seem to process all subsequent valid commands (echo, cd, pwd).
ERROR ERROR ERROR ERROR
(Note that the last 'cd' DID have a legal number of arguments).

###################

error messages

################### What was sent to stderr was:
Too many arguments

If your stderr message complained about confusing options, then CONGRATULATIONS
may be in order.

Of course, a human will have to judge the quality of your error/warning messages

NOTE: if lots of output lines are being duplicated, this may mean that some
child has not died properly, and has become 'a second p2 parent'.

At the moment changing directories is not supported in history

fixed:
adding history feature actually broke cd b/c I forgot
the cd block was skipping the initialization of the next line of history.
quick fix by add these initializing statements to the cd block

When last command has less arguments then a previous command. Calling that previous command yields a set fault

ex)
%1% echo 1
1
%2% ls
GradeEarly getword.h gradernotes p2 p2.h tags
getword.c getword.o makefile p2.c p2.o
%3% !1
Segmentation fault

This issue occurred because the index after ls in newargv == NULL. passing NULL to strcpy is a no no
I used strdup to solve it. (this uses malloc so may be illegal)

Test 26... does the history mechanism obey all the funny rules?
Here is the result of ~cssc0013/Two/p2 ~cs570/Data4/input97 :

The contents you sent to stdout was:
%1% last word is uname
%2% last word is uname
%3% %4%
The 'echo' command output should have appeared three times.
The 'echo' command did NOT execute 3 times. ERROR ERROR ERROR ERROR

The fourth command should have added the output of the arch command into a file
called 'arch'.
ERROR ERROR ERROR ERROR

Repeating the 4th command should have doubled the size of arch to 14 characters
ERROR ERROR ERROR ERROR
And finally, the last command should have run 'uname -v'
ERROR ERROR ERROR ERROR
All the input97 commands are legal, so there should be NO error messages.
The data you sent to stderr was:
!$: file does not exist.
ERROR ERROR ERROR ERROR

Three (six) more points were possible here; your total is now 39/42
Scoring 3 points is considered perfect, but if you got everything right,
you could actually score SIX points here!

you know what I mean

As of right now, getword does not know the difference between '\|' or '|'
ex) echo hi \| cat -> "hi | cat"

probably involves using a global flag in getword.

splint takes a shit everywhere in this project. will probably do this last

Same specs as the other append except we include error to the same output stream