diff --git a/src/apps/bin/arp/arp.c b/src/apps/bin/arp/arp.c
index 47f3f6b1aa..47b78dad24 100644
--- a/src/apps/bin/arp/arp.c
+++ b/src/apps/bin/arp/arp.c
@@ -62,6 +62,9 @@
 #include <unistd.h>
 #include <sys/time.h>
 
+// phoudoin, 20031026: FIXME: sysctl.h is a kernel private header!
+extern int sysctl(int *, uint, void *, size_t *, void *, size_t);
+
 int delete (const char *, const char *);
 void search(in_addr_t addr, void (*action)(struct sockaddr_dl *sdl,
 	struct sockaddr_inarp *sin, struct rt_msghdr *rtm));
@@ -77,6 +80,7 @@ void getsocket (void);
 int rtmsg (int);
 int set (int, char **);
 void usage (void);
+void err(int error, char *msg);
 
 static int pid;
 static int nflag;	/* no reverse dns lookups */
diff --git a/src/apps/bin/ifconfig/ifconfig.c b/src/apps/bin/ifconfig/ifconfig.c
index ca37eed429..ceb2e7b43f 100644
--- a/src/apps/bin/ifconfig/ifconfig.c
+++ b/src/apps/bin/ifconfig/ifconfig.c
@@ -50,6 +50,7 @@ void in_getaddr(char *s, int which);
 void in_getprefix(char *plen, int which);
 void status(int link);
 void printif(struct ifreq *ifrm, int ifaliases);
+void usage(void);
 
 /* The commands we recognise... */
 struct _cmd_ {
@@ -90,7 +91,7 @@ const struct afswtch {
 
 const struct afswtch *afp;	/*the address family being set or asked about*/
 
-void usage()
+void usage(void)
 {
 	fprintf(stderr, "OpenBeOS Network Team: ifconfig: version %s\n", version);
 	fprintf(stderr, "usage: ifconfig [ -m ] [ -a ] [ -A ] [ interface ]\n"
@@ -305,7 +306,7 @@ void printif(struct ifreq *ifrm, int ifaliases)
 			err(1, "malloc");
 		if (ioctl(sock, SIOCGIFCONF, &ifc) < 0)
 			err(1, "SIOCGIFCONF");
-		if (ifc.ifc_len + sizeof(ifreq) < len)
+		if ((int) (ifc.ifc_len + sizeof(ifreq)) < len)
 			break;
 		len *= 2;
 	}
@@ -315,12 +316,12 @@ void printif(struct ifreq *ifrm, int ifaliases)
 		ifrp = (struct ifreq *)((caddr_t)ifc.ifc_req + i);
 		memcpy(ifrbuf, ifrp, sizeof(*ifrp));
 		siz = ((struct ifreq *)ifrbuf)->ifr_addr.sa_len;
-		if (siz < sizeof(ifrp->ifr_addr))
+		if (siz < (int) sizeof(ifrp->ifr_addr))
 			siz = sizeof(ifrp->ifr_addr);
 		siz += sizeof(ifrp->ifr_name);
 		i += siz;
 		/* avoid alignment issue */
-		if (sizeof(ifrbuf) < siz)
+		if ((int) sizeof(ifrbuf) < siz)
 			err(1, "ifr too big");
 		memcpy(ifrbuf, ifrp, siz);
 		ifrp = (struct ifreq *)ifrbuf;
diff --git a/src/apps/bin/ping/ping.c b/src/apps/bin/ping/ping.c
index 66c9787fee..2fe09dfb82 100644
--- a/src/apps/bin/ping/ping.c
+++ b/src/apps/bin/ping/ping.c
@@ -150,17 +150,21 @@ int reset_kerninfo;
 #define DEFAULT_BUFSPACE	60*1024 /* default read buffer size */
 int bufspace = DEFAULT_BUFSPACE;
 
-void fill (char *, char *);
-void catcher(), prtsig(), finish(), summary(int);
+void fill(char *, char *);
+void catcher(int);
+void prtsig(int);
+void finish(int);
+void summary(int);
 int compute_in_cksum (u_short *, int);
-void pinger();
+void pinger(void);
 char *pr_addr (in_addr_t);
 int check_icmph (struct ip *);
 void pr_icmph (struct icmp *);
 void pr_pack (char *, int, struct sockaddr_in *);
 void pr_retip (struct ip *);
+void pr_iph(struct ip *ip);
 uint64 qsqrt (uint64);
-void usage();
+void usage(void);
 
 
 static void err(int exitval, char *where)
@@ -339,7 +343,7 @@ int main(int argc, char **argv)
 	if (options & F_FLOOD && options & F_INTERVAL)
 		err(1, "-f and -i options are incompatible");
 
-	if (datalen >= sizeof(uint64))	/* can we time transfer */
+	if (datalen >= (int) sizeof(uint64))	/* can we time transfer */
 		timing = 1;
 	packlen = datalen + MAXIPLEN + MAXICMPLEN;
 	if (!(packet = (u_char *)malloc((u_int)packlen)))
@@ -470,7 +474,7 @@ int main(int argc, char **argv)
 		pinger();
 
 	if ((options & F_FLOOD) == 0)
-		catcher();		/* start things going */
+		catcher(0);		/* start things going */
 
 	fdmasks = _howmany(s+1, NFDBITS) * sizeof(fd_mask);
 	if ((fdmaskp = (fd_set *)malloc(fdmasks)) == NULL)
@@ -509,7 +513,7 @@ int main(int argc, char **argv)
 			break;
 	}
 	free(fdmaskp);
-	finish();
+	finish(0);
 	/* NOTREACHED */
 	exit(0);	/* Make the compiler happy */
 }
@@ -524,7 +528,7 @@ int main(int argc, char **argv)
  * launched exactly at 1-second intervals).  This does not affect the
  * quality of the delay and loss statistics.
  */
-void catcher()
+void catcher(int sig)
 {
 	int waittime;
 	int save_errno = errno;
@@ -551,7 +555,7 @@ void catcher()
  * Print statistics when SIGINFO is received.
  * XXX not race safe
  */
-void prtsig()
+void prtsig(int sig)
 {
 	int save_errno = errno;
 
@@ -567,7 +571,7 @@ void prtsig()
  * of the data portion are used to hold a UNIX "timeval" struct in VAX
  * byte-order, to compute the round-trip time.
  */
-void pinger()
+void pinger(void)
 {
 	struct icmp *icp;
 	int cc;
@@ -701,13 +705,13 @@ void pr_pack(char *buf, int cc, struct sockaddr_in *from)
 			/* check the data */
 			cp = (u_char*)&icp->icmp_data[sizeof(bigtime_t)];
 			dp = &outpack[8 + sizeof(bigtime_t)];
-			for (i = 8 + sizeof(bigtime_t); i < datalen;
+			for (i = 8 + sizeof(bigtime_t); (int) i < datalen;
 			    ++i, ++cp, ++dp) {
 				if (*cp != *dp) {
 	(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
 	    i, *dp, *cp);
 					cp = (u_char*)&icp->icmp_data[0];
-					for (i = 8; i < datalen; ++i, ++cp) {
+					for (i = 8; (int) i < datalen; ++i, ++cp) {
 						if ((i % 32) == 8)
 							(void)printf("\n\t");
 						(void)printf("%x ", *cp);
@@ -777,8 +781,8 @@ void pr_pack(char *buf, int cc, struct sockaddr_in *from)
 			i -= IPOPT_MINOFF;
 			if (i <= 0)
 				continue;
-			if (i == old_rrlen
-			    && cp == (u_char *)buf + sizeof(struct ip) + 2
+			if ((int) i == old_rrlen
+			    && cp == (u_char *) buf + sizeof(struct ip) + 2
 			    && !memcmp(cp, old_rr, i)
 			    && !(options & F_FLOOD)) {
 				(void)printf("\t(same route)");
@@ -904,7 +908,7 @@ void summary(int header)
 
 uint64 qsqrt(uint64 qdev)
 {
-	uint64 y, x = 1;
+	int64 y, x = 1;
 
 	if (!qdev)
 		return(0);
@@ -916,14 +920,14 @@ uint64 qsqrt(uint64 qdev)
 		x /= 2;
 	} while ((x - y) > 1 || (x - y) > -1);
 
-	return(x);
+	return (uint64) x;
 }
 
 /*
  * finish --
  *	Print out statistics, and give up.
  */
-void finish()
+void finish(int sig)
 {
 	(void)signal(SIGINT, SIG_IGN);
 	(void)signal(SIGALRM, SIG_IGN);
@@ -1151,9 +1155,7 @@ pr_icmph(icp)
  * pr_iph --
  *	Print an IP header with options.
  */
-void
-pr_iph(ip)
-	struct ip *ip;
+void pr_iph(struct ip *ip)
 {
 	int hlen;
 	u_char *cp;
@@ -1203,9 +1205,7 @@ pr_addr(a)
  * pr_retip --
  *	Dump some info on a returned (via ICMP) IP packet.
  */
-void
-pr_retip(ip)
-	struct ip *ip;
+void pr_retip(struct ip *ip)
 {
 	int hlen;
 	u_char *cp;
@@ -1241,7 +1241,7 @@ fill(bp, patp)
 
 	if (ii > 0)
 		for (kk = 0;
-		    kk <= MAXPAYLOAD - (8 + sizeof(uint64) + ii);
+		    kk <= (int) (MAXPAYLOAD - (8 + sizeof(uint64) + ii));
 		    kk += ii)
 			for (jj = 0; jj < ii; ++jj)
 				bp[jj + kk] = pat[jj];
diff --git a/src/apps/bin/route/route.c b/src/apps/bin/route/route.c
index 2e1043e357..991254537d 100644
--- a/src/apps/bin/route/route.c
+++ b/src/apps/bin/route/route.c
@@ -55,7 +55,8 @@
 
 #include "keywords.h"
 
-int getaddr(int which, char *s, struct hostent **hpp);
+// phoudoin, 20031026: FIXME: sysctl.h is a kernel private header!
+extern int sysctl(int *, uint, void *, size_t *, void *, size_t);
 
 union	sockunion {
 	struct	sockaddr sa;
@@ -95,6 +96,16 @@ void	 mask_addr __P((void));
 //int	 getaddr __P((int, char *, struct hostent **));
 int	 rtmsg __P((int, int));
 int	 x25_makemask __P((void));
+int _getopt(int nargc, char *const *nargv, const char *ostr);
+void usage(char *cp);
+void quit(char *s);
+int getaddr(int which, char *s, struct hostent **hpp);
+char * any_ntoa(const struct sockaddr *sa);
+void set_metric(char *value, int key);
+void flushroutes(int argc, char *argv[]);
+int keyword(char *cp);
+void interfaces(void);
+void inet_makenetandmask(uint32 net, struct sockaddr_in *sin, int bits);
 
 extern void show __P((int, char **));	/* XXX - from show.c */
 
@@ -109,6 +120,8 @@ char *optarg;
 #define BADARG (int)':'
 #define EMSG ""
 
+
+
 int _getopt(int nargc, char *const *nargv, const char *ostr)
 {
 	static char *place = EMSG;
@@ -262,10 +275,7 @@ main(argc, argv)
  * Purge all entries in the routing tables not
  * associated with network interfaces.
  */
-void
-flushroutes(argc, argv)
-	int argc;
-	char *argv[];
+void flushroutes(int argc, char *argv[])
 {
 	size_t needed;
 	int mib[6], rlen, seqno;
@@ -364,9 +374,7 @@ printf("write gave %d\n", rlen);
 
 static char hexlist[] = "0123456789abcdef";
 
-char *
-any_ntoa(sa)
-	const struct sockaddr *sa;
+char * any_ntoa(const struct sockaddr *sa)
 {
 	static char obuf[240];
 	const char *in = sa->sa_data;
@@ -571,10 +579,7 @@ netname(sa)
 	return (line);
 }
 
-void
-set_metric(value, key)
-	char *value;
-	int key;
+void set_metric(char *value, int key)
 {
 	int flag = 0;
 	u_long noval, *valp = &noval;
@@ -1048,7 +1053,7 @@ short ipx_nullh[] = {0,0,0};
 short ipx_bh[] = {-1,-1,-1};
 
 void
-interfaces()
+interfaces(void)
 {
 	size_t needed;
 	int mib[6];
@@ -1077,7 +1082,7 @@ interfaces()
 }
 
 void
-monitor()
+monitor(void)
 {
 	int n;
 	char msg[2048];
diff --git a/src/apps/bin/route/show.c b/src/apps/bin/route/show.c
index b89e8a7b4b..417b3b8918 100644
--- a/src/apps/bin/route/show.c
+++ b/src/apps/bin/route/show.c
@@ -52,6 +52,9 @@
 #include <string.h>
 #include <unistd.h>
 
+// phoudoin, 20031026: FIXME: sysctl.h is a kernel private header!
+extern int sysctl(int *, uint, void *, size_t *, void *, size_t);
+
 /* XXX: things from route.c */
 extern char *routename __P((struct sockaddr *));
 extern char *netname __P((struct sockaddr *));
@@ -94,7 +97,8 @@ static void pr_rthdr __P((void));
 static void pr_family __P((int));
 
 int	keyword(char *);
-void	usage(char *);
+void usage(char *);
+void show(int argc, char **argv);
 
 /*
  * Print routing tables.