sysutils/copytape: include errno.h for errno

errno must be accessed by a macro from errno.h.

Tidy includes and add unistd.h for read/write.

Consolidate patches for easy of maintenance.

This code is borderline useless and certainly broken with modern tape
sizes due to the use of ints for sizes.

PR:		281781
Approved by:	sjroz@verizon.net (maintainer)

sysutils/copytape/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=		copytape
 PORTVERSION=		1.0
-PORTREVISION=	1
+PORTREVISION=		2
 CATEGORIES=		sysutils
 MASTER_SITES=		COMP_SOURCES/unix/volume10
 DISTNAME=		copytape

sysutils/copytape/files/patch-copytape.c

@@ -1,15 +1,28 @@
---- copytape.c.orig	Fri Oct 23 17:23:06 1998
-+++ copytape.c	Fri Oct 23 17:23:46 1998
-@@ -36,7 +36,7 @@
+--- copytape.c.orig
++++ copytape.c
+@@ -28,15 +28,18 @@
+  */
  
- extern int      errno;
+ 
+-#include <stdio.h>
+ #include <sys/types.h>
+ #include <sys/ioctl.h>
+ #include <sys/mtio.h>
+ #include <sys/file.h>
+ 
+-extern int      errno;
++#include <errno.h>
++#include <stdio.h>
++#include <stdlib.h>
++#include <string.h>
++#include <unistd.h>
  
 -#define BUFLEN		262144	/* max tape block size */
 +#define BUFLEN		(1024*1024)	/* max tape block size */
  #define TAPE_MARK	-100	/* return record length if we read a
  				 * tape mark */
  #define END_OF_TAPE	-101	/* 2 consecutive tape marks */
-@@ -149,7 +149,7 @@
+@@ -149,7 +152,7 @@
  	    len = input(from);
  	} while (len > 0);
  	if (len == FORMAT_ERROR) {

sysutils/copytape/files/patch-copytape.c_2

@@ -1,11 +0,0 @@
---- copytape.c.orig    2013-10-16 06:54:00.000000000 -0400
-+++ copytape.c 2013-10-16 06:54:13.000000000 -0400
-@@ -29,6 +29,8 @@
-
-
- #include <stdio.h>
-+#include <stdlib.h>
-+#include <string.h>
- #include <sys/types.h>
- #include <sys/ioctl.h>
- #include <sys/mtio.h>