diff --git a/libexec/bootpd/bootpd.c b/libexec/bootpd/bootpd.c
--- a/libexec/bootpd/bootpd.c
+++ b/libexec/bootpd/bootpd.c
@@ -170,9 +170,7 @@
  */
 
 int
-main(argc, argv)
-	int argc;
-	char **argv;
+main(int argc, char **argv)
 {
 	struct timeval *timeout;
 	struct bootp *bp;
@@ -593,8 +591,7 @@
 
 /* Signal catchers */
 PRIVATE void
-catcher(sig)
-	int sig;
+catcher(int sig)
 {
 	if (sig == SIGHUP)
 		do_readtab = 1;
@@ -620,7 +617,7 @@
  * forward the request there.)
  */
 PRIVATE void
-handle_request()
+handle_request(void)
 {
 	struct bootp *bp = (struct bootp *) pktbuf;
 	struct host *hp = NULL;
@@ -998,7 +995,7 @@
  * Process BOOTREPLY packet.
  */
 PRIVATE void
-handle_reply()
+handle_reply(void)
 {
 	if (debug) {
 		report(LOG_INFO, "processing boot reply");
@@ -1013,9 +1010,7 @@
  * not the originator of this reply packet.
  */
 PRIVATE void
-sendreply(forward, dst_override)
-	int forward;
-	int32 dst_override;
+sendreply(int forward, int32 dst_override)
 {
 	struct bootp *bp = (struct bootp *) pktbuf;
 	struct in_addr dst;
@@ -1131,9 +1126,7 @@
  */
 
 PRIVATE int
-chk_access(path, filesize)
-	char *path;
-	int32 *filesize;
+chk_access(char *path, int32 *filesize)
 {
 	struct stat st;
 
@@ -1161,9 +1154,7 @@
  */
 
 PRIVATE void
-dovend_cmu(bp, hp)
-	struct bootp *bp;
-	struct host *hp;
+dovend_cmu(struct bootp *bp, struct host *hp)
 {
 	struct cmu_vend *vendp;
 	struct in_addr_list *taddr;
@@ -1231,10 +1222,7 @@
 		return; \
 	} while (0)
 PRIVATE void
-dovend_rfc1048(bp, hp, bootsize)
-	struct bootp *bp;
-	struct host *hp;
-	int32 bootsize;
+dovend_rfc1048(struct bootp *bp, struct host *hp, int32 bootsize)
 {
 	int bytesleft, len;
 	byte *vp;
diff --git a/libexec/bootpd/bootpgw/bootpgw.c b/libexec/bootpd/bootpgw/bootpgw.c
--- a/libexec/bootpd/bootpgw/bootpgw.c
+++ b/libexec/bootpd/bootpgw/bootpgw.c
@@ -144,9 +144,7 @@
  */
 
 int
-main(argc, argv)
-	int argc;
-	char **argv;
+main(int argc, char **argv)
 {
 	struct timeval *timeout;
 	struct bootp *bp;
diff --git a/libexec/bootpd/dovend.h b/libexec/bootpd/dovend.h
--- a/libexec/bootpd/dovend.h
+++ b/libexec/bootpd/dovend.h
@@ -2,5 +2,5 @@
 /* $FreeBSD$ */
 
 extern int dovend_rfc1497(struct host *hp, u_char *buf, int len);
-extern int insert_ip(int, struct in_addr_list *, u_char **, int *);
+extern int insert_ip(byte, struct in_addr_list *, byte **, int *);
 extern void insert_u_long(u_int32, u_char **);
diff --git a/libexec/bootpd/dovend.c b/libexec/bootpd/dovend.c
--- a/libexec/bootpd/dovend.c
+++ b/libexec/bootpd/dovend.c
@@ -36,10 +36,7 @@
  */
 
 int
-dovend_rfc1497(hp, buf, len)
-	struct host *hp;
-	byte *buf;
-	int len;
+dovend_rfc1497(struct host *hp, byte *buf, int len)
 {
 	int bytesleft = len;
 	byte *vp = buf;
@@ -272,11 +269,7 @@
  */
 
 int
-insert_ip(tag, iplist, dest, bytesleft)
-	byte tag;
-	struct in_addr_list *iplist;
-	byte **dest;
-	int *bytesleft;
+insert_ip(byte tag, struct in_addr_list *iplist, byte **dest, int *bytesleft)
 {
 	struct in_addr *addrptr;
 	unsigned addrcount = 1;
@@ -315,10 +308,7 @@
  */
 
 static int
-insert_generic(gendata, buff, bytesleft)
-	struct shared_bindata *gendata;
-	byte **buff;
-	int *bytesleft;
+insert_generic(struct shared_bindata *gendata, byte **buff, int *bytesleft)
 {
 	byte *srcptr;
 	int length, numbytes;
@@ -370,9 +360,7 @@
  */
 
 void
-insert_u_long(value, dest)
-	u_int32 value;
-	byte **dest;
+insert_u_long(u_int32 value, byte **dest)
 {
 	byte *temp;
 	int n;
diff --git a/libexec/bootpd/dumptab.c b/libexec/bootpd/dumptab.c
--- a/libexec/bootpd/dumptab.c
+++ b/libexec/bootpd/dumptab.c
@@ -29,8 +29,7 @@
 
 #ifndef	DEBUG
 void
-dumptab(filename)
-	char *filename;
+dumptab(char *filename)
 {
 	report(LOG_INFO, "No dumptab support!");
 }
@@ -42,8 +41,7 @@
  */
 
 void
-dumptab(filename)
-	char *filename;
+dumptab(char *filename)
 {
 	int n;
 	struct host *hp;
@@ -123,9 +121,7 @@
  */
 
 static void
-dump_host(fp, hp)
-	FILE *fp;
-	struct host *hp;
+dump_host(FILE *fp, struct host *hp)
 {
 	/* Print symbols in alphabetical order for reader's convenience. */
 	if (hp) {
@@ -292,9 +288,7 @@
 
 
 static void
-dump_generic(fp, generic)
-	FILE *fp;
-	struct shared_bindata *generic;
+dump_generic(FILE *fp, struct shared_bindata *generic)
 {
 	u_char *bp = generic->data;
 	u_char *ep = bp + generic->length;
@@ -337,9 +331,7 @@
  */
 
 static void
-list_ipaddresses(fp, ipptr)
-	FILE *fp;
-	struct in_addr_list *ipptr;
+list_ipaddresses(FILE *fp, struct in_addr_list *ipptr)
 {
 	unsigned count;
 	struct in_addr *addrptr;
diff --git a/libexec/bootpd/getether.c b/libexec/bootpd/getether.c
--- a/libexec/bootpd/getether.c
+++ b/libexec/bootpd/getether.c
@@ -119,9 +119,7 @@
 #include <net/if_types.h>
 
 int
-getether(ifname, eap)
-	char *ifname;				/* interface name from ifconfig structure */
-	char *eap;					/* Ether address (output) */
+getether(char *ifname, char *eap)
 {
 	int fd, rc = -1;
 	int n;
diff --git a/libexec/bootpd/getif.c b/libexec/bootpd/getif.c
--- a/libexec/bootpd/getif.c
+++ b/libexec/bootpd/getif.c
@@ -40,9 +40,7 @@
 
 /* Return a pointer to the interface struct for the passed address. */
 struct ifreq *
-getif(s, addrp)
-	int s;						/* socket file descriptor */
-	struct in_addr *addrp;		/* destination address on interface */
+getif(int s, struct in_addr *addrp)
 {
 	int maxmatch;
 	int len, m, incr;
@@ -110,8 +108,7 @@
  * internet addresses supplied.
  */
 static int
-nmatch(ca, cb)
-	u_char *ca, *cb;			/* ptrs to IP address, network order */
+nmatch(u_char *ca, u_char *cb)
 {
 	u_int m = 0;				/* count of matching bits */
 	u_int n = 4;				/* bytes left, then bitmask */
diff --git a/libexec/bootpd/hash.c b/libexec/bootpd/hash.c
--- a/libexec/bootpd/hash.c
+++ b/libexec/bootpd/hash.c
@@ -69,8 +69,7 @@
  */
 
 hash_tbl *
-hash_Init(tablesize)
-	unsigned tablesize;
+hash_Init(unsigned tablesize)
 {
 	hash_tbl *hashtblptr;
 	unsigned totalsize;
@@ -99,9 +98,7 @@
  */
 
 PRIVATE void
-hashi_FreeMembers(bucketptr, free_data)
-	hash_member *bucketptr;
-	hash_freefp free_data;
+hashi_FreeMembers(hash_member *bucketptr, hash_freefp free_data)
 {
 	hash_member *nextbucket;
 	while (bucketptr) {
@@ -121,9 +118,7 @@
  */
 
 void
-hash_Reset(hashtable, free_data)
-	hash_tbl *hashtable;
-	hash_freefp free_data;
+hash_Reset(hash_tbl *hashtable, hash_freefp free_data)
 {
 	hash_member **bucketptr;
 	unsigned i;
@@ -160,9 +155,7 @@
  */
 
 unsigned
-hash_HashFunction(string, len)
-	unsigned char *string;
-	unsigned len;
+hash_HashFunction(unsigned char *string, unsigned len)
 {
 	unsigned accum;
 
@@ -182,11 +175,8 @@
  */
 
 int
-hash_Exists(hashtable, hashcode, compare, key)
-	hash_tbl *hashtable;
-	unsigned hashcode;
-	hash_cmpfp compare;
-	hash_datum *key;
+hash_Exists(hash_tbl *hashtable, unsigned hashcode, hash_cmpfp compare,
+	hash_datum *key)
 {
 	hash_member *memberptr;
 
@@ -213,11 +203,8 @@
  */
 
 int
-hash_Insert(hashtable, hashcode, compare, key, element)
-	hash_tbl *hashtable;
-	unsigned hashcode;
-	hash_cmpfp compare;
-	hash_datum *key, *element;
+hash_Insert(hash_tbl *hashtable, unsigned hashcode, hash_cmpfp compare,
+	hash_datum *key, hash_datum *element)
 {
 	hash_member *temp;
 
@@ -244,12 +231,8 @@
  */
 
 int
-hash_Delete(hashtable, hashcode, compare, key, free_data)
-	hash_tbl *hashtable;
-	unsigned hashcode;
-	hash_cmpfp compare;
-	hash_datum *key;
-	hash_freefp free_data;
+hash_Delete(hash_tbl *hashtable, unsigned hashcode, hash_cmpfp compare,
+	hash_datum *key, hash_freefp free_data)
 {
 	hash_member *memberptr, *tempptr;
 	hash_member *previous = NULL;
@@ -310,11 +293,8 @@
  */
 
 hash_datum *
-hash_Lookup(hashtable, hashcode, compare, key)
-	hash_tbl *hashtable;
-	unsigned hashcode;
-	hash_cmpfp compare;
-	hash_datum *key;
+hash_Lookup(hash_tbl *hashtable, unsigned hashcode, hash_cmpfp compare,
+	hash_datum *key)
 {
 	hash_member *memberptr;
 
@@ -335,8 +315,7 @@
  */
 
 hash_datum *
-hash_NextEntry(hashtable)
-	hash_tbl *hashtable;
+hash_NextEntry(hash_tbl *hashtable)
 {
 	unsigned bucket;
 	hash_member *memberptr;
@@ -388,8 +367,7 @@
  */
 
 hash_datum *
-hash_FirstEntry(hashtable)
-	hash_tbl *hashtable;
+hash_FirstEntry(hash_tbl *hashtable)
 {
 	hashtable->bucketnum = 0;
 	hashtable->member = (hashtable->table)[0];
diff --git a/libexec/bootpd/hwaddr.c b/libexec/bootpd/hwaddr.c
--- a/libexec/bootpd/hwaddr.c
+++ b/libexec/bootpd/hwaddr.c
@@ -81,12 +81,7 @@
  * bound to hardware address 'ha' of length 'len'.
  */
 void
-setarp(s, ia, hafamily, haddr, halen)
-	int s;						/* socket fd */
-	struct in_addr *ia;			/* protocol address */
-	int hafamily;				/* HW address family */
-	u_char *haddr;				/* HW address data */
-	int halen;
+setarp(int s, struct in_addr *ia, int hafamily, u_char *haddr, int halen)
 {
 #ifdef	SIOCSARP
 #ifdef	WIN_TCP
@@ -207,9 +202,7 @@
  * Convert a hardware address to an ASCII string.
  */
 char *
-haddrtoa(haddr, hlen)
-	u_char *haddr;
-	int hlen;
+haddrtoa(u_char *haddr, int hlen)
 {
 	static char haddrbuf[3 * MAXHADDRLEN + 1];
 	char *bufptr;
@@ -286,9 +279,7 @@
 };
 
 void
-haddr_conv802(addr_in, addr_out, len)
-	u_char *addr_in, *addr_out;
-	int len;
+haddr_conv802(u_char *addr_in, u_char *addr_out, int len)
 {
 	u_char *lim;
 
@@ -303,8 +294,7 @@
  * bit-reverse table above.
  */
 static int
-bitrev(n)
-	int n;
+bitrev(int n)
 {
 	int i, r;
 
@@ -317,7 +307,8 @@
 	return r;
 }
 
-main()
+void
+main(void)
 {
 	int i;
 	for (i = 0; i <= 0xFF; i++) {
diff --git a/libexec/bootpd/lookup.c b/libexec/bootpd/lookup.c
--- a/libexec/bootpd/lookup.c
+++ b/libexec/bootpd/lookup.c
@@ -13,7 +13,6 @@
 
 #ifdef	ETC_ETHERS
 #include <net/ethernet.h>
-extern int ether_hostton();
 #endif
 
 #include <netdb.h>
@@ -29,9 +28,7 @@
  * Return NULL if addr not found.
  */
 u_char *
-lookup_hwa(hostname, htype)
-	char *hostname;
-	int htype;
+lookup_hwa(char *hostname, int htype)
 {
 	switch (htype) {
 
@@ -65,9 +62,7 @@
  * Return non-zero on failure.
  */
 int
-lookup_ipa(hostname, result)
-	char *hostname;
-	u_int32 *result;
+lookup_ipa(char *hostname, u_int32 *result)
 {
 	struct hostent *hp;
 	hp = gethostbyname(hostname);
@@ -85,11 +80,11 @@
  * XXX - This is OK as a default, but to really make this automatic,
  * we would need to get the subnet mask from the ether interface.
  * If this is wrong, specify the correct value in the bootptab.
+ *
+ * Both arguments are in network order
  */
 int
-lookup_netmask(addr, result)
-	u_int32 addr;				/* both in network order */
-	u_int32 *result;
+lookup_netmask(u_int32 addr, u_int32 *result)
 {
 	int32 m, a;
 
diff --git a/libexec/bootpd/readfile.c b/libexec/bootpd/readfile.c
--- a/libexec/bootpd/readfile.c
+++ b/libexec/bootpd/readfile.c
@@ -219,7 +219,6 @@
  * Externals and forward declarations.
  */
 
-extern boolean iplookcmp();
 boolean nmcmp(hash_datum *, hash_datum *);
 
 PRIVATE void
@@ -288,7 +287,7 @@
  * (shared by bootpd and bootpef)
  */
 void
-rdtab_init()
+rdtab_init(void)
 {
 	hwhashtable = hash_Init(HASHTABLESIZE);
 	iphashtable = hash_Init(HASHTABLESIZE);
@@ -306,8 +305,7 @@
  */
 
 void
-readtab(force)
-	int force;
+readtab(int force)
 {
 	struct host *hp;
 	FILE *fp;
@@ -489,10 +487,7 @@
  */
 
 PRIVATE void
-read_entry(fp, buffer, bufsiz)
-	FILE *fp;
-	char *buffer;
-	unsigned *bufsiz;
+read_entry(FILE *fp, char *buffer, unsigned *bufsiz)
 {
 	int c, length;
 
@@ -629,9 +624,7 @@
  */
 
 PRIVATE int
-process_entry(host, src)
-	struct host *host;
-	char *src;
+process_entry(struct host *host, char *src)
 {
 	int retval;
 	char *msg;
@@ -775,9 +768,7 @@
  * Obviously, this need a few more comments. . . .
  */
 PRIVATE int
-eval_symbol(symbol, hp)
-	char **symbol;
-	struct host *hp;
+eval_symbol(char **symbol, struct host *hp)
 {
 	char tmpstr[MAXSTRINGLEN];
 	byte *tmphaddr;
@@ -1149,9 +1140,7 @@
  */
 
 PRIVATE char *
-get_string(src, dest, length)
-	char **src, *dest;
-	unsigned *length;
+get_string(char **src, char *dest, unsigned *length)
 {
 	int n, len, quoteflag;
 
@@ -1201,8 +1190,7 @@
  */
 
 PRIVATE struct shared_string *
-get_shared_string(src)
-	char **src;
+get_shared_string(char **src)
 {
 	char retstring[MAXSTRINGLEN];
 	struct shared_string *s;
@@ -1238,10 +1226,7 @@
  */
 
 PRIVATE int
-process_generic(src, dest, tagvalue)
-	char **src;
-	struct shared_bindata **dest;
-	u_int tagvalue;
+process_generic(char **src, struct shared_bindata **dest, u_int tagvalue)
 {
 	byte tmpbuf[MAXBUFLEN];
 	byte *str;
@@ -1296,8 +1281,7 @@
  */
 
 PRIVATE boolean
-goodname(hostname)
-	char *hostname;
+goodname(char *hostname)
 {
 	do {
 		if (!isalpha(*hostname++)) {	/* First character must be a letter */
@@ -1329,8 +1313,7 @@
  */
 
 PRIVATE boolean
-nullcmp(d1, d2)
-	hash_datum *d1, *d2;
+nullcmp(hash_datum *d1, hash_datum *d2)
 {
 	return FALSE;
 }
@@ -1342,8 +1325,7 @@
  */
 
 boolean
-nmcmp(d1, d2)
-	hash_datum *d1, *d2;
+nmcmp(hash_datum *d1, hash_datum *d2)
 {
 	char *name = (char *) d1;	/* XXX - OK? */
 	struct host *hp = (struct host *) d2;
@@ -1365,8 +1347,7 @@
  */
 
 PRIVATE boolean
-hwinscmp(d1, d2)
-	hash_datum *d1, *d2;
+hwinscmp(hash_datum *d1, hash_datum *d2)
 {
 	struct host *host1 = (struct host *) d1;
 	struct host *host2 = (struct host *) d2;
@@ -1421,9 +1402,7 @@
  * current host entry are inferred from the template entry.
  */
 PRIVATE void
-fill_defaults(hp, src)
-	struct host *hp;
-	char **src;
+fill_defaults(struct host *hp, char **src)
 {
 	unsigned int tlen, hashcode;
 	struct host *hp2;
@@ -1513,8 +1492,7 @@
  */
 
 PRIVATE void
-adjust(s)
-	char **s;
+adjust(char **s)
 {
 	char *t;
 
@@ -1538,8 +1516,7 @@
  */
 
 PRIVATE void
-eat_whitespace(s)
-	char **s;
+eat_whitespace(char **s)
 {
 	char *t;
 
@@ -1557,8 +1534,7 @@
  */
 
 PRIVATE void
-makelower(s)
-	char *s;
+makelower(char *s)
 {
 	while (*s) {
 		if (isupper(*s)) {
@@ -1598,8 +1574,7 @@
  */
 
 PRIVATE struct in_addr_list *
-get_addresses(src)
-	char **src;
+get_addresses(char **src)
 {
 	struct in_addr tmpaddrlist[MAXINADDRS];
 	struct in_addr *address1, *address2;
@@ -1655,9 +1630,7 @@
  */
 
 PRIVATE int
-prs_inetaddr(src, result)
-	char **src;
-	u_int32 *result;
+prs_inetaddr(char **src, u_int32 *result)
 {
 	char tmpstr[MAXSTRINGLEN];
 	u_int32 value;
@@ -1755,9 +1728,7 @@
  */
 
 PRIVATE byte *
-prs_haddr(src, htype)
-	char **src;
-	u_int htype;
+prs_haddr(char **src, u_int htype)
 {
 	static byte haddr[MAXHADDRLEN];
 	byte *hap;
@@ -1810,9 +1781,7 @@
  */
 
 PRIVATE int
-interp_byte(src, retbyte)
-	char **src;
-	byte *retbyte;
+interp_byte(char **src, byte *retbyte)
 {
 	int v;
 
@@ -1842,8 +1811,7 @@
  */
 
 PRIVATE u_int32
-get_u_long(src)
-	char **src;
+get_u_long(char **src)
 {
 	u_int32 value, base;
 	char c;
@@ -1891,8 +1859,7 @@
  */
 
 PRIVATE void
-free_host(hmp)
-	hash_datum *hmp;
+free_host(hash_datum *hmp)
 {
 	struct host *hostptr = (struct host *) hmp;
 	if (hostptr == NULL)
@@ -1948,8 +1915,7 @@
  */
 
 PRIVATE void
-del_iplist(iplist)
-	struct in_addr_list *iplist;
+del_iplist(struct in_addr_list *iplist)
 {
 	if (iplist) {
 		if (!(--(iplist->linkcount))) {
@@ -1967,8 +1933,7 @@
  */
 
 PRIVATE void
-del_string(stringptr)
-	struct shared_string *stringptr;
+del_string(struct shared_string *stringptr)
 {
 	if (stringptr) {
 		if (!(--(stringptr->linkcount))) {
@@ -1986,8 +1951,7 @@
  */
 
 PRIVATE void
-del_bindata(dataptr)
-	struct shared_bindata *dataptr;
+del_bindata(struct shared_bindata *dataptr)
 {
 	if (dataptr) {
 		if (!(--(dataptr->linkcount))) {
@@ -2008,8 +1972,7 @@
  */
 
 PRIVATE char *
-smalloc(nbytes)
-	unsigned nbytes;
+smalloc(unsigned nbytes)
 {
 	char *retvalue;
 
@@ -2033,8 +1996,7 @@
  */
 
 boolean
-hwlookcmp(d1, d2)
-	hash_datum *d1, *d2;
+hwlookcmp(hash_datum *d1, hash_datum *d2)
 {
 	struct host *host1 = (struct host *) d1;
 	struct host *host2 = (struct host *) d2;
@@ -2054,8 +2016,7 @@
  */
 
 boolean
-iplookcmp(d1, d2)
-	hash_datum *d1, *d2;
+iplookcmp(hash_datum *d1, hash_datum *d2)
 {
 	struct host *host1 = (struct host *) d1;
 	struct host *host2 = (struct host *) d2;
diff --git a/libexec/bootpd/report.c b/libexec/bootpd/report.c
--- a/libexec/bootpd/report.c
+++ b/libexec/bootpd/report.c
@@ -33,8 +33,7 @@
 static int stderr_only = 1;
 
 void
-report_init(nolog)
-	int nolog;
+report_init(int nolog)
 {
 	stderr_only = nolog;
 #ifdef SYSLOG
@@ -120,7 +119,7 @@
  * Return pointer to static string which gives full filesystem error message.
  */
 const char *
-get_errmsg()
+get_errmsg(void)
 {
 	return strerror(errno);
 }
diff --git a/libexec/bootpd/rtmsg.c b/libexec/bootpd/rtmsg.c
--- a/libexec/bootpd/rtmsg.c
+++ b/libexec/bootpd/rtmsg.c
@@ -115,10 +115,8 @@
 /*
  * Set an individual arp entry
  */
-int bsd_arp_set(ia, eaddr, len)
-	struct in_addr *ia;
-	char *eaddr;
-	int len;
+int
+bsd_arp_set(struct in_addr *ia, char *eaddr, int len)
 {
 	struct sockaddr_in *sin = &sin_m;
 	struct sockaddr_dl *sdl;
@@ -176,8 +174,8 @@
 }
 
 
-static int rtmsg(cmd)
-	int cmd;
+static int
+rtmsg(int cmd)
 {
 	static int seq;
 	int rlen;
diff --git a/libexec/bootpd/tools/bootpef/bootpef.c b/libexec/bootpd/tools/bootpef/bootpef.c
--- a/libexec/bootpd/tools/bootpef/bootpef.c
+++ b/libexec/bootpd/tools/bootpef/bootpef.c
@@ -100,7 +100,7 @@
  * Print "usage" message and exit
  */
 static void
-usage()
+usage(void)
 {
 	fprintf(stderr,
 	   "usage:  $s [ -c chdir ] [-d level] [-f configfile] [host...]\n");
@@ -116,9 +116,7 @@
  * main server loop is started.
  */
 int
-main(argc, argv)
-	int argc;
-	char **argv;
+main(int argc, char **argv)
 {
 	struct host *hp;
 	char *stmp;
@@ -262,8 +260,7 @@
  */
 
 static void
-mktagfile(hp)
-	struct host *hp;
+mktagfile(struct host *hp)
 {
 	FILE *fp;
 	int bytesleft, len;
diff --git a/libexec/bootpd/tools/bootptest/bootptest.c b/libexec/bootpd/tools/bootptest/bootptest.c
--- a/libexec/bootpd/tools/bootptest/bootptest.c
+++ b/libexec/bootpd/tools/bootptest/bootptest.c
@@ -128,9 +128,7 @@
  */
 
 int
-main(argc, argv)
-	int argc;
-	char **argv;
+main(int argc, char **argv)
 {
 	struct bootp *bp;
 	struct servent *sep;
@@ -439,8 +437,7 @@
 }
 
 static void
-send_request(s)
-	int s;
+send_request(int s)
 {
 	/* Print the request packet. */
 	printf("Sending to %s", inet_ntoa(sin_server.sin_addr));
@@ -462,8 +459,7 @@
  * Return true if truncated.
  */
 int
-printfn(s, ep)
-	u_char *s, *ep;
+printfn(u_char *s, u_char *ep)
 {
 	u_char c;
 
@@ -493,8 +489,7 @@
  * (like inet_ntoa, but ina is a pointer)
  */
 char *
-ipaddr_string(ina)
-	struct in_addr *ina;
+ipaddr_string(struct in_addr *ina)
 {
 	static char b[24];
 	u_char *p;
diff --git a/libexec/bootpd/tools/bootptest/print-bootp.c b/libexec/bootpd/tools/bootptest/print-bootp.c
--- a/libexec/bootpd/tools/bootptest/print-bootp.c
+++ b/libexec/bootpd/tools/bootptest/print-bootp.c
@@ -53,10 +53,7 @@
  * Print bootp requests
  */
 void
-bootp_print(bp, length, sport, dport)
-	struct bootp *bp;
-	int length;
-	u_short sport, dport;
+bootp_print(struct bootp *bp, int length, u_short sport, u_short dport)
 {
 	static char tstr[] = " [|bootp]";
 	static unsigned char vm_cmu[4] = VM_CMU;
@@ -274,9 +271,7 @@
 #define	KNOWN_OPTIONS (sizeof(rfc1048_opts) / sizeof(rfc1048_opts[0]))
 
 static void
-rfc1048_print(bp, length)
-	u_char *bp;
-	int length;
+rfc1048_print(u_char *bp, int length)
 {
 	u_char tag;
 	u_char *ep;
@@ -376,9 +371,7 @@
 }
 
 static void
-cmu_print(bp, length)
-	u_char *bp;
-	int length;
+cmu_print(u_char *bp, int length)
 {
 	struct cmu_vend *v;
 
@@ -424,9 +417,7 @@
  */
 
 static void
-other_print(bp, length)
-	u_char *bp;
-	int length;
+other_print(u_char *bp, int length)
 {
 	u_char *ep;					/* end pointer */
 	u_char *zp;					/* points one past last non-zero byte */
@@ -464,9 +455,7 @@
 }
 
 static void
-dump_hex(bp, len)
-	u_char *bp;
-	int len;
+dump_hex(u_char *bp, int len)
 {
 	while (len > 0) {
 		printf("%02X", *bp);