i/o redirection in sh

better parsing of sh commands (copied from jos sh)
cat: read from 1 if no args
sbrk system call, but untested
getpid system call
moved locks in keyboard intr, but why do we get intr w. null characters from keyboard?

1 files changed, 1 insertions, 0 deletions

diff --git a/defs.h b/defs.h
index 2928428..b8b7b84 100644
--- a/defs.h
+++ b/defs.h
@@ -16,6 +16,7 @@ struct jmpbuf;
 void setupsegs(struct proc *);
 struct proc * copyproc(struct proc*);
 struct spinlock;
+int growproc(int);
 void sleep(void *, struct spinlock *);
 void wakeup(void *);
 void scheduler(void);