start of phase 3

Makefile

@@ -183,7 +183,8 @@ UPROGS=\
 	_usertests\
 	_wc\
 	_zombie\
-	_test\
+	_getChildrenTest\
+	_getCountTest\
 
 fs.img: mkfs README $(UPROGS)
 	./mkfs fs.img README $(UPROGS)
@@ -252,7 +253,7 @@ 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\test.c\
+	ln.c ls.c mkdir.c rm.c stressfs.c usertests.c wc.c zombie.c\getChildrenTest.c\_getCountTest\
 	printf.c umalloc.c\
 	README dot-bochsrc *.pl toc.* runoff runoff1 runoff.list\
 	.gdbinit.tmpl gdbutil\

test.c → getChildrenTest.c

 #include "types.h"
 #include "stat.h"
 #include "user.h"
- 
 int
 main(int argc,char **argv)
 {
   int a= fork();
   fork();
   fork();
+  fork();
   wait();
   wait();
   wait();
   int b = getChildren(a);
-  printf(1,"***** %d ********\n",b);
-  printf(1, "My first xv6 program\n");
+  printf(1,"pid %d =*****ppid=%d //\n",getpid(),b);
+  wait();
+//  printf(1, "My first xv6 program\n"); 
+  //for question one testing :) here is finished
   exit();
 }

getCountTest.c

+#include "types.h"
+#include "stat.h"
+#include "user.h"
+ 
+int
+main(int argc,char **argv)
+{
+  int a = 4;
+  getChildren(a);
+  getChildren(a);
+  int test = readcommand (0, command, args);
+  printf("i find this %d",test);	
+  int result = getCount(22);
+  printf(1,"--- %d ---",result);
+  exit();
+}
\ No newline at end of file

syscall.c

@@ -104,6 +104,7 @@ extern int sys_wait(void);
 extern int sys_write(void);
 extern int sys_uptime(void);
 extern int sys_getChildren(void);
+extern int sys_getCount(void);
 
 static int (*syscalls[])(void) = {
 [SYS_fork]    sys_fork,
@@ -128,6 +129,7 @@ static int (*syscalls[])(void) = {
 [SYS_mkdir]   sys_mkdir,
 [SYS_close]   sys_close,
 [SYS_getChildren]   sys_getChildren,
+[SYS_getCount] sys_getCount
 };
 
 void

syscall.h

@@ -21,3 +21,4 @@
 #define SYS_mkdir  20
 #define SYS_close  21
 #define SYS_getChildren  22
+#define SYS_getCount  23

sysproc.c

@@ -125,6 +125,19 @@ sys_getChildren(int prosecId)
 }
 
 
+//question 2
+int
+sys_getCount(int find){
+  argint(0,&find);
+  int counter =0;
+  for(int i=0;i<=myproc()->usagepointer;i++){
+    if(myproc()->usage[i]==find){
+      counter++;
+    }
+  }
+  return counter;
+}
+
 
 
 

user.h

@@ -24,6 +24,7 @@ char* sbrk(int);
 int sleep(int);
 int uptime(void);
 int getChildren(int);
+int getCount(int);
 
 // ulib.c
 int stat(const char*, struct stat*);

usys.S

@@ -30,3 +30,4 @@ SYSCALL(sbrk)
 SYSCALL(sleep)
 SYSCALL(uptime)
 SYSCALL(getChildren)
+SYSCALL(getCount)