Added iffy io command, tuned piping error handling

README.md

@@ -7,9 +7,11 @@ The members of this project are:
 2) John Sanchez
 3) Redden Money
 
-proj_1_gonzalez_sanchez_money.tar contents:
-cssh.c // main implementation
-makefile
+project1_gonzalez_sanchez_money.tar contents:
+  README
+  shell.c // main implementation
+  makefile
+
 
 Completed using: linprog
 
@@ -21,10 +23,24 @@ To Clean:
 $> make clean
 
 Known Bugs & Unfinished Portions:
+ • Piping works, but only one can be used at a time.
+   -> Results from lack of implementation for when an additional "pipe-in" target is supplied.
+ • Background processing is somewhat unfinished. (Zombie processes might occur)
+ • "io" command is unfinished.
+    ->Attempted to complete the built-in using flags and opening the proc/pid/io file.
+    ->Attempt resulted in the fact that variables are not universal between processes, as well as possible path resolution issues.
+ • Path resolution is simple.
+    ->Ex: "cd ~" works, "cd ~/DIRNAME" gives an error.
+    ->Resulting from the lack of splitting the special characters and environment variables from the rest of the line.
+ • There needs to be whitespace between the redirection/pipe and the command.
+ • "echo" built-in does not signal an error when there is a non-existent environment variable.
+   ->"echo" built-in also does not account for single or double quotes.
+ • "$SHELL" environment variable p
 
 Special Considerations:
-
-
+ • In the "exit" built-in, clock_gettime() was used instead of gettimeofday(), which is not always available to certain (notably older)
+  Linux versions, along with it being absent on Mac...
+
 ==============================
 ==============================
 Report

makefile

@@ -1,6 +1,6 @@
 
 cssh: cssh.c
-		gcc -lreadline cssh.c
+		gcc -lreadline shell.c
 
 clean:
 	rm a.out