1 files changed, 118 insertions, 0 deletions
diff --git a/usr.bin/unvis/unvis.c b/usr.bin/unvis/unvis.c
new file mode 100644
index 0000000..0ae054b
--- /dev/null
+++ b/usr.bin/unvis/unvis.c
@@ -0,0 +1,118 @@
+/*-
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1989, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)unvis.c	8.1 (Berkeley) 6/6/93";
+#endif
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <vis.h>
+
+void process(FILE *, const char *);
+static void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+	FILE *fp;
+	int ch;
+
+	while ((ch = getopt(argc, argv, "")) != -1)
+		switch((char)ch) {
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (*argv)
+		while (*argv) {
+			if ((fp=fopen(*argv, "r")) != NULL)
+				process(fp, *argv);
+			else
+				warn("%s", *argv);
+			argv++;
+		}
+	else
+		process(stdin, "<stdin>");
+	exit(0);
+}
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage: unvis [file ...]\n");
+	exit(1);
+}
+
+void
+process(FILE *fp, const char *filename)
+{
+	int offset = 0, c, ret;
+	int state = 0;
+	char outc;
+
+	while ((c = getc(fp)) != EOF) {
+		offset++;
+	again:
+		switch(ret = unvis(&outc, (char)c, &state, 0)) {
+		case UNVIS_VALID:
+			putchar(outc);
+			break;
+		case UNVIS_VALIDPUSH:
+			putchar(outc);
+			goto again;
+		case UNVIS_SYNBAD:
+			warnx("%s: offset: %d: can't decode", filename, offset);
+			state = 0;
+			break;
+		case 0:
+		case UNVIS_NOCHAR:
+			break;
+		default:
+			errx(1, "bad return value (%d), can't happen", ret);
+		}
+	}
+	if (unvis(&outc, (char)0, &state, UNVIS_END) == UNVIS_VALID)
+		putchar(outc);
+}