start of 2.1

Makefile

@@ -28,6 +28,8 @@ OBJS = \
 	vectors.o\
 	vm.o\
 	
+
+
 # Cross-compiling (e.g., on Mac OS X)
 # TOOLPREFIX = i386-jos-elf
 
@@ -181,6 +183,7 @@ UPROGS=\
 	_usertests\
 	_wc\
 	_zombie\
+	_test\
 
 fs.img: mkfs README $(UPROGS)
 	./mkfs fs.img README $(UPROGS)
@@ -249,7 +252,7 @@ qemu-nox-gdb: fs.img xv6.img .gdbinit
 
 EXTRA=\
 	mkfs.c ulib.c user.h cat.c echo.c forktest.c grep.c kill.c\
-	ln.c ls.c mkdir.c rm.c stressfs.c usertests.c wc.c zombie.c\
+	ln.c ls.c mkdir.c rm.c stressfs.c usertests.c wc.c zombie.c\test.c\
 	printf.c umalloc.c\
 	README dot-bochsrc *.pl toc.* runoff runoff1 runoff.list\
 	.gdbinit.tmpl gdbutil\

syscall.c

@@ -103,6 +103,7 @@ extern int sys_unlink(void);
 extern int sys_wait(void);
 extern int sys_write(void);
 extern int sys_uptime(void);
+extern int sys_getChildren(void);
 
 static int (*syscalls[])(void) = {
 [SYS_fork]    sys_fork,
@@ -126,6 +127,7 @@ static int (*syscalls[])(void) = {
 [SYS_link]    sys_link,
 [SYS_mkdir]   sys_mkdir,
 [SYS_close]   sys_close,
+[SYS_getChildren]   sys_getChildren,
 };
 
 void

syscall.h

@@ -20,3 +20,4 @@
 #define SYS_link   19
 #define SYS_mkdir  20
 #define SYS_close  21
+#define SYS_getChildren  22

sysproc.c

@@ -10,7 +10,10 @@
 int
 sys_fork(void)
 {
-  return fork();
+  int dadPid = pid;
+  int pidChild = fork();
+
+  return 
 }
 
 int
@@ -89,3 +92,19 @@ sys_uptime(void)
   release(&tickslock);
   return xticks;
 }
+
+//my implimentation
+int
+sys_getChildren(void)
+{
+  return 120;
+}
+
+
+
+
+
+
+
+
+

test.c

+#include "types.h"
+#include "stat.h"
+#include "user.h"
+ 
+int
+main(void)
+{
+  printf(1, "My first xv6 program\n");
+  exit();
+}

user.h

@@ -23,6 +23,9 @@ int getpid(void);
 char* sbrk(int);
 int sleep(int);
 int uptime(void);
+int getChildren(void);
+
+
 
 // ulib.c
 int stat(const char*, struct stat*);

usys.S

@@ -29,3 +29,4 @@ SYSCALL(getpid)
 SYSCALL(sbrk)
 SYSCALL(sleep)
 SYSCALL(uptime)
+SYSCALL(getChildren)