From f97498a3f0e2a296a6ca4fc08e5211a900c568e0 Mon Sep 17 00:00:00 2001
From: Lars Brinkhoff <lars@nocrew.org>
Date: Sat, 3 Dec 2016 22:29:39 +0100
Subject: [PATCH] Build in macOS.

---
 read20.c | 17 +++++++++++++++++
 tapeio.c | 12 ++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/read20.c b/read20.c
index e0c7710..81eff98 100644
--- a/read20.c
+++ b/read20.c
@@ -84,6 +84,23 @@ char *expression = 0;
 char *re_comp_error;     /* Error message from re_comp() */
 extern char *re_comp();
 
+#ifdef __APPLE__
+static regex_t re_regexp;
+
+char *re_comp(char *s)
+{
+  if (regcomp(&re_regexp, s, 0) == 0)
+    return NULL;
+  else
+    return "error";
+}
+
+static int re_exec(char *s)
+{
+  return regexec(&re_regexp, s, 0, 0, 0);
+}
+#endif
+
 /*
 	read20  [-f tapefile] [-t] [-c] [-T] [-n number] pattern
 
diff --git a/tapeio.c b/tapeio.c
index 7ffc7f5..2860cf2 100644
--- a/tapeio.c
+++ b/tapeio.c
@@ -53,6 +53,16 @@
 #define MTSETBLK STSETBLK
 #define MTSETDENSITY STSETDENSITY
 #define mtop stop
+#elif __APPLE__
+#define MTWEOF 0
+#define MTREW 0
+#define MTFSR 0
+#define MTFSF 0
+#define MTBSR 0
+#define MTIOCTOP 0
+#define MTSETBLK 0
+#define MTSETDENSITY 0
+struct mtop { int mt_op; int mt_count; };
 #else
 #include <sys/mtio.h>
 #endif
@@ -280,9 +290,11 @@ tape_handle_t opentape (char *name, int create, int writable)
 	  *p++ = '\0';	/* shoot out @, point at host name */
 	  user = (*p != '\0') ? host : NULL;  /* keep non-null user */
 	}
+#ifndef __APPLE__
       if ((mtape->tapefd = rexec (&p, htons (512), user, NULL, "/etc/rmt",
 				  (int *) NULL)) < 0)
         FAIL ("?Connection failed\n");
+#endif
 
       /* build rmt "open device" command */
       if ((1 + strlen (port) + 1 + 1 + 1 + 1) > sizeof (mtape->netbuf))