diff --git a/compile/Makefile b/compile/Makefile
index 45ba89e..3d78e64 100644
--- a/compile/Makefile
+++ b/compile/Makefile
@@ -17,13 +17,13 @@ $(error PLATFORM is not set. Edit your Makedefs file and add 'PLATFORM=arm-qemu'
 endif
 
 ifeq ($(PLATFORM),arm-qemu)
-	PLAT_CFLAGS =  -DARM_QEMU -mcpu=arm1176jz-s -ggdb3 
+	PLAT_CFLAGS =  -DARM_QEMU -mcpu=arm1176jz-s -ggdb3
 	PLAT_LOADADDR = 0x00010000
 else ifeq ($(PLATFORM),arm-bbb)
-	PLAT_CFLAGS =  -DARM_BBB -mcpu=cortex-a8 
+	PLAT_CFLAGS =  -DARM_BBB -mcpu=cortex-a8
 	PLAT_LOADADDR = 0x81000000
 else ifeq ($(PLATFORM),x86-galileo)
-	PLAT_CFLAGS =   
+	PLAT_CFLAGS =
 endif
 
 TOPDIR		=	..
@@ -56,7 +56,7 @@ REBUILDFLAGS 	+=	-s $(TOPDIR)/device/tty			\
 			-s $(TOPDIR)/device/lfs			\
 			-s $(TOPDIR)/device/uart		\
 			-s $(TOPDIR)/device/uart-pl011		\
-			-s $(TOPDIR)/device/loopback		
+			-s $(TOPDIR)/device/loopback
 
 else ifeq ($(PLATFORM),arm-bbb)
 REBUILDFLAGS    +=	-s $(TOPDIR)/device/tty			\
@@ -138,7 +138,7 @@ uboot-tool/mkimage: uboot-tool/mkimage.c
 	@echo making mkimage
 	@(cd uboot-tool; make)
 
-$(BLDDIRS): 
+$(BLDDIRS):
 	@mkdir -p $(BLDDIRS)
 
 objects: $(LD_LIST)
@@ -179,7 +179,7 @@ etags:
 	@(cd $(TOPDIR); find . -name '*.[chS]' -exec etags -a {} \;)
 
 qemu: xinu
-	export QEMU_AUDIO_DRV=wav; export QEMU_WAV_PATH=$(TOPDIR)/compile/.wav.wav; qemu-system-arm -M versatilepb -m 512M -nographic -cpu arm1176 -kernel xinu.boot 
+	export QEMU_AUDIO_DRV=wav; export QEMU_WAV_PATH=$(TOPDIR)/compile/.wav.wav; qemu-system-arm -M versatilepb -m 512M -nographic -cpu arm1176 -kernel xinu.boot
 
 qemu-gdb: xinu
 		export QEMU_AUDIO_DRV=wav; export QEMU_WAV_PATH=$(TOPDIR)/compile/.wav.wav;qemu-system-arm -M versatilepb -m 512M -nographic -cpu arm1176 -kernel xinu.boot -S -gdb tcp::${GPORT}
diff --git a/device/rds/rdsinit.c b/device/rds/rdsinit.c
index b06533c..5881706 100644
--- a/device/rds/rdsinit.c
+++ b/device/rds/rdsinit.c
@@ -15,7 +15,7 @@ devcall	rdsinit (
 	struct	rdscblk	*rdptr;		/* Ptr to device contol block	*/
 	struct	rdbuff	*bptr;		/* Ptr to buffer in memory	*/
 					/*   used to form linked list	*/
-	struct	rdbuff	*pptr;		/* Ptr to previous buff on list	*/
+	struct	rdbuff	*pptr = NULL;		/* Ptr to previous buff on list	*/
 	struct	rdbuff	*buffend;	/* Last address in buffer memory*/
 	uint32	size;			/* Total size of memory needed	*/
 					/*   buffers			*/
@@ -28,7 +28,7 @@ devcall	rdsinit (
 
 	rdptr->rd_state = RD_FREE;
 	rdptr->rd_id[0] = NULLCH;
-	
+
 	/* Set initial message sequence number */
 
 	rdptr->rd_seq = 1;
@@ -68,7 +68,10 @@ devcall	rdsinit (
 		pptr->rd_status = RD_INVALID;	/* Buffer is empty	*/
 		pptr->rd_next = bptr;		/* Point to next buffer */
 	}
-	pptr->rd_next = (struct rdbuff *) NULL;	/* Last buffer on list	*/
+
+	if (pptr != NULL) {
+		pptr->rd_next = (struct rdbuff *) NULL;	/* Last buffer on list	*/
+	}
 
 	/* Create the request list and available buffer semaphores */
 
diff --git a/device/rfs/rflputc.c b/device/rfs/rflputc.c
index e09290b..d7e06e3 100644
--- a/device/rfs/rflputc.c
+++ b/device/rfs/rflputc.c
@@ -11,10 +11,6 @@ devcall	rflputc(
 	char	ch			/* Character to write		*/
 	)
 {
-	struct	rflcblk	*rfptr;		/* Pointer to rfl control block	*/
-
-	rfptr = &rfltab[devptr->dvminor];
-
 	if (rflwrite(devptr, &ch, 1) != 1) {
 		return SYSERR;
 	}
diff --git a/device/rfs/rfscomm.c b/device/rfs/rfscomm.c
index bd48aac..834c10e 100644
--- a/device/rfs/rfscomm.c
+++ b/device/rfs/rfscomm.c
@@ -18,7 +18,6 @@ int32	rfscomm (
 	int32	retval;			/* Return value			*/
 	int32	seq;			/* Sequence for this exchange	*/
 	int16	rtype;			/* Reply type in host byte order*/
-	int32	slot;			/* UDP slot			*/
 
 	/* For the first time after reboot, register the server port */
 
diff --git a/device/uart/kvprintf.c b/device/uart/kvprintf.c
index 863f274..1c0da57 100644
--- a/device/uart/kvprintf.c
+++ b/device/uart/kvprintf.c
@@ -9,6 +9,9 @@
 #include <stdarg.h>
 #include <stdio.h>
 
+void	_doprnt(const char *, va_list, int (*)(int, int), int);
+int kputc(int, int);
+
 /**
  * @ingroup uartgeneric
  *
@@ -26,14 +29,13 @@
  */
 syscall kvprintf(const char *format, va_list ap)
 {
-    int retval;
     intmask im;
 
     /* Note: it isn't strictly necessary to disable global interrupts here, but
      * it prevents kprintf()'s from stepping on each other toes if you happen to
      * call kprintf() from an interrupt handler.  */
     im = disable();
-    retval = _doprnt(format, ap, (int (*)(int, int))kputc, (int)&devtab[SERIAL0]);
+    _doprnt(format, ap, (int (*)(int, int))kputc, (int)&devtab[SERIAL0]);
     restore(im);
-    return retval;
+    return OK;
 }
diff --git a/include/dns.h b/include/dns.h
index a13f3f7..6bb1706 100644
--- a/include/dns.h
+++ b/include/dns.h
@@ -47,3 +47,5 @@ struct	dns_rr {
 	uint16	*rdlen;		/* RR RD Length		*/
 	char	*rdata;		/* RR Data		*/
 };
+
+uint32	dns_qa(char* dname);
diff --git a/include/interrupt.h b/include/interrupt.h
index 19800aa..bb3fdb8 100644
--- a/include/interrupt.h
+++ b/include/interrupt.h
@@ -48,6 +48,8 @@ void restore(intmask);
 void enable_irq(intmask);
 void disable_irq(intmask);
 
+int32 initintc(void);
+
 #define INTC_SYSCONFIG_SOFTRESET	0x00000002
 #define INTC_SYSSTATUS_RESETDONE	0x00000001
 
diff --git a/include/kernel.h b/include/kernel.h
index 9079c67..7a9c7c1 100644
--- a/include/kernel.h
+++ b/include/kernel.h
@@ -65,4 +65,3 @@ extern	qid16	readylist;	/* global ID for list of ready processes*/
 /* Size of the stack for the null process */
 
 #define	NULLSTK		8192	/* stack size for null process		*/
-
diff --git a/include/prototypes.h b/include/prototypes.h
index bf32551..3ad5eeb 100644
--- a/include/prototypes.h
+++ b/include/prototypes.h
@@ -117,6 +117,8 @@ extern	syscall	getc(did32);
 /* in file getitem.c */
 extern	pid32	getfirst(qid16);
 
+pid32 getitem(pid32);
+
 /* in file getmem.c */
 extern	char	*getmem(uint32);
 
@@ -365,6 +367,11 @@ extern	syscall	ptsend(int32, umsg32);
 /* in file putc.c */
 extern	syscall	putc(did32, char);
 
+/* in file queue.c */
+
+pid32 dequeue(qid16);
+pid32 enqueue(pid32, qid16);
+
 /* in file ramclose.c */
 extern	devcall	ramclose(struct dentry *);
 
@@ -629,7 +636,7 @@ devcall loopbackGetc(struct dentry *);
 devcall loopbackPutc(struct dentry *, char);
 devcall loopbackControl(struct dentry *, int, long, long);
 
-syscall kputc(uchar c, struct dentry *devptr);
+syscall kprintf(char *fmt, ...);
 #endif /* ARM_QEMU */
 
 #ifdef ARM_BBB
diff --git a/include/string.h b/include/string.h
index 43ba7ec..3087017 100644
--- a/include/string.h
+++ b/include/string.h
@@ -6,5 +6,6 @@ extern	int32	strncmp(const char *, const char *, int32);
 extern	char	*strchr(const char *, int32);
 extern	char	*strrchr(const char *, int32);
 extern	char	*strstr(const char *, const char *);
-extern	int32	strnlen(const char *, uint32);
+extern	int32	strnlen(const char *, uint32);
 extern	int	strlen(char *str);
+int strcpy(char *tar, char *src);
diff --git a/lib/doscan.c b/lib/doscan.c
index 677375f..8bebb30 100644
--- a/lib/doscan.c
+++ b/lib/doscan.c
@@ -160,7 +160,7 @@ static int _innum(int **ptr, int type, int len, int size,
     register char *np;
     char numbuf[64];
     register char c, base;
-    int expseen, negflg, c1, ndigit;
+    int negflg, c1, ndigit;
     long lcval;
 
     if (type == 'c' || type == 's' || type == '[')
@@ -181,7 +181,6 @@ static int _innum(int **ptr, int type, int len, int size,
         base = 16;
     }
     np = numbuf;
-    expseen = 0;
     negflg = 0;
     while ((c = (*getch) (arg1, arg2)) == ' ' || c == '\t' || c == '\n')
     {;
diff --git a/shell/xsh_mmu.c b/shell/xsh_mmu.c
index 6aad89e..1a7ca26 100644
--- a/shell/xsh_mmu.c
+++ b/shell/xsh_mmu.c
@@ -5,14 +5,14 @@
 #include <stdio.h>
 
 void function1(){
-	int *num = 0x10900000;
+	int *num = (int*)0x10900000;
 	*num = 300;
 	printf("[process ID=%d]Value at address 0x%x is %d\n",currpid,num,*num);
 }
 
 shellcmd xsh_mmu(int32 args,char *argv[]) {
-	int *num = 0x10900000;
-	int *num1 = 0x11C00000;
+	int *num = (int*)0x10900000;
+	int *num1 = (int*)0x11C00000;
 	*num = 100;
 	*num1 = 200;
 	printf("[process ID=%d]Value at address 0x%x is %d\n",currpid,num,*num);
diff --git a/system/evec.c b/system/evec.c
index 1e267cb..5b19af3 100644
--- a/system/evec.c
+++ b/system/evec.c
@@ -81,8 +81,8 @@ void	irq_dispatch()
 
 	/* If a handler is set for the interrupt, call it */
 
-	if(intc_vector[xnum]) {
-		handler = intc_vector[xnum];
+	if (intc_vector[xnum]) {
+		handler = (interrupt(*)(void))intc_vector[xnum];
 		handler(xnum);
 	}
 
diff --git a/system/platform/arm-bbb/clkhandler.c b/system/platform/arm-bbb/clkhandler.c
index ffd2be3..2d5e67d 100644
--- a/system/platform/arm-bbb/clkhandler.c
+++ b/system/platform/arm-bbb/clkhandler.c
@@ -10,7 +10,7 @@ void	clkhandler()
 {
 
 	static uint32 count1000 = 1000;	/* variable to count 1000ms */
-	volatile struct am335x_timer1ms *csrptr = 0x44E31000;
+	volatile struct am335x_timer1ms *csrptr = (struct am335x_timer1ms *)0x44E31000;
 					/* Pointer to timer CSR	    */
 
 	/* If there is no interrupt, return */
diff --git a/system/platform/arm-bbb/xsh_ping.c b/system/platform/arm-bbb/xsh_ping.c
index a678c9b..b83b596 100644
--- a/system/platform/arm-bbb/xsh_ping.c
+++ b/system/platform/arm-bbb/xsh_ping.c
@@ -3,6 +3,7 @@
 #include <xinu.h>
 #include <stdio.h>
 #include <string.h>
+#include <dns.h>
 
 /*------------------------------------------------------------------------
  * xsh_ping - shell command to ping a remote host
diff --git a/system/platform/arm-qemu/gettime.c b/system/platform/arm-qemu/gettime.c
index 34c3c0c..e1d853a 100644
--- a/system/platform/arm-qemu/gettime.c
+++ b/system/platform/arm-qemu/gettime.c
@@ -22,9 +22,6 @@ status	gettime(
 	  uint32  *timvar		/* Location to store the result	*/
 	)
 {
-	uint32	now;			/* Current time (UCT)		*/
-	int32	retval;			/* Return value from call	*/
-
 	/* Get current time in UCT representation (GMT) */
 
 	//retval = getutime(&now);
diff --git a/system/platform/arm-qemu/kprintf.c b/system/platform/arm-qemu/kprintf.c
index d52d8cd..9a61cfb 100644
--- a/system/platform/arm-qemu/kprintf.c
+++ b/system/platform/arm-qemu/kprintf.c
@@ -7,6 +7,8 @@
 #include <kernel.h>
 #include <stdarg.h>
 
+syscall kvprintf(const char *format, va_list ap);
+
 /**
  * @ingroup uartgeneric
  *