Use headers instead of manual declerations of standard functions and

variables.

contrib/tcp_wrappers/inetcf.c

@@ -14,11 +14,8 @@ static char sccsid[] = "@(#) inetcf.c 1.7 97/02/12 02:13:23";
 #include <sys/stat.h>
 #include <stdio.h>
 #include <errno.h>
-#include <string.h>
 #include <stdlib.h>
-
-extern int errno;
-extern void exit();
+#include <string.h>
 
 #include "tcpd.h"
 #include "inetcf.h"

contrib/tcp_wrappers/scaffold.c

@@ -21,6 +21,7 @@ static char sccs_id[] = "@(#) scaffold.c 1.6 97/03/21 19:27:24";
 #include <stdio.h>
 #include <syslog.h>
 #include <setjmp.h>
+#include <stdlib.h>
 #include <string.h>
 #include <stdlib.h>
 

contrib/tcp_wrappers/tcpd.c

@@ -26,6 +26,7 @@ static char sccsid[] = "@(#) tcpd.c 1.10 96/02/11 17:01:32";
 #include <stdio.h>
 #include <syslog.h>
 #include <string.h>
+#include <unistd.h>
 
 #ifndef MAXPATHNAMELEN
 #define MAXPATHNAMELEN	BUFSIZ

contrib/tcp_wrappers/tcpdchk.c

@@ -34,14 +34,9 @@ static char sccsid[] = "@(#) tcpdchk.c 1.8 97/02/12 02:13:25";
 #include <setjmp.h>
 #include <errno.h>
 #include <netdb.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <stdlib.h>
-
-extern int errno;
-extern void exit();
-extern int optind;
-extern char *optarg;
 
 #ifndef INADDR_NONE
 #define INADDR_NONE     (-1)		/* XXX should be 0xffffffff */

contrib/tcp_wrappers/tcpdmatch.c

@@ -30,13 +30,10 @@ static char sccsid[] = "@(#) tcpdmatch.c 1.5 96/02/11 17:01:36";
 #include <stdio.h>
 #include <syslog.h>
 #include <setjmp.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
-extern void exit();
-extern int optind;
-extern char *optarg;
-
 #ifndef	INADDR_NONE
 #define	INADDR_NONE	(-1)		/* XXX should be 0xffffffff */
 #endif