fix getblk to actually lock the block

no more cons_put system calls
usertests tests two processes writing files

1 files changed, 3 insertions, 0 deletions

diff --git a/user.h b/user.h
index d91b4df..9dd1684 100644
--- a/user.h
+++ b/user.h
@@ -14,9 +14,12 @@ int exec(char *, char **);
 int open(char *, int);
 int mknod (char*,short,short,short);
 int unlink (char*);
+struct stat;
 int fstat (int fd, struct stat *stat);
+
 int puts(char*);
 char* strcpy(char*, char*);
 void printf(int fd, char *fmt, ...);
 char *gets(char *, int max);
 unsigned int strlen(char *);
+void * memset(void *dst, int c, unsigned int n);