1 files changed, 112 insertions, 0 deletions
diff --git a/gnu/usr.bin/rcs/merge/merge.c b/gnu/usr.bin/rcs/merge/merge.c
new file mode 100644
index 00000000000..652352b8b30
--- /dev/null
+++ b/gnu/usr.bin/rcs/merge/merge.c
@@ -0,0 +1,112 @@
+/* merge - three-way file merge */
+
+/* Copyright 1991, 1992, 1993, 1994 Paul Eggert
+   Distributed under license by the Free Software Foundation, Inc.
+
+This file is part of RCS.
+
+RCS is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+RCS is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with RCS; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+Report problems and direct all questions to:
+
+    rcs-bugs@cs.purdue.edu
+
+*/
+
+#include "rcsbase.h"
+
+static void badoption P((char const*));
+
+static char const usage[] =
+ "\nmerge: usage: merge [-AeEpqxX3] [-L lab [-L lab [-L lab]]] file1 file2 file3";
+
+	static void
+badoption(a)
+	char const *a;
+{
+	error("unknown option: %s%s", a, usage);
+}
+
+
+mainProg(mergeId, "merge", "$Id: merge.c,v 1.1 1995/10/18 08:41:02 deraadt Exp $")
+{
+	register char const *a;
+	char const *arg[3], *label[3], *edarg = 0;
+	int labels, tostdout;
+
+	labels = 0;
+	tostdout = false;
+
+	for (;  (a = *++argv)  &&  *a++ == '-';  --argc) {
+		switch (*a++) {
+			case 'A': case 'E': case 'e':
+				if (edarg  &&  edarg[1] != (*argv)[1])
+					error("%s and %s are incompatible",
+						edarg, *argv
+					);
+				edarg = *argv;
+				break;
+
+			case 'p': tostdout = true; break;
+			case 'q': quietflag = true; break;
+
+			case 'L':
+				if (3 <= labels)
+					faterror("too many -L options");
+				if (!(label[labels++] = *++argv))
+					faterror("-L needs following argument");
+				--argc;
+				break;
+
+			case 'V':
+				printf("RCS version %s\n", RCS_version_string);
+				exitmain(0);
+
+			default:
+				badoption(a - 2);
+				continue;
+		}
+		if (*a)
+			badoption(a - 2);
+	}
+
+	if (argc != 4)
+		faterror("%s arguments%s",
+			argc<4 ? "not enough" : "too many",  usage
+		);
+
+	/* This copy keeps us `const'-clean.  */
+	arg[0] = argv[0];
+	arg[1] = argv[1];
+	arg[2] = argv[2];
+
+	for (;  labels < 3;  labels++)
+		label[labels] = arg[labels];
+
+	if (nerror)
+		exiterr();
+	exitmain(merge(tostdout, edarg, label, arg));
+}
+
+
+#if RCS_lint
+#	define exiterr mergeExit
+#endif
+	void
+exiterr()
+{
+	tempunlink();
+	_exit(DIFF_TROUBLE);
+}