--- /dev/null
+.\" $NetBSD: unvis.1,v 1.9 2010/11/28 01:33:37 wiz Exp $
+.\"
+.\" Copyright (c) 1989, 1990, 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.
+.\" 3. 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.
+.\"
+.\" @(#)unvis.1 8.1 (Berkeley) 6/6/93
+.\"
+.Dd November 27, 2010
+.Dt UNVIS 1
+.Os
+.Sh NAME
+.Nm unvis
+.Nd "revert a visual representation of data back to original form"
+.Sh SYNOPSIS
+.Nm
+.Op Fl e
+.Op Fl Hh | Fl m
+.Op Ar file ...
+.Sh DESCRIPTION
+.Nm
+is the inverse function of
+.Xr vis 1 .
+It reverts
+a visual representation of data back to its original form on standard output.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl e
+Don't decode \e escaped sequences.
+.It Fl H
+Decode using the URI encoding from RFC 1866.
+.Pq Dv VIS_HTTP1866
+.It Fl h
+Decode using the URI encoding from RFC 1808.
+.Pq Dv VIS_HTTP1808
+.It Fl m
+Decode using mime style.
+.Pq Dv VIS_MIMESTYLE
+.El
+.Pp
+Mixing
+.Fl h
+or
+.Fl H
+with
+.Fl m
+is not supported.
+.Sh SEE ALSO
+.Xr vis 1 ,
+.Xr unvis 3 ,
+.Xr vis 3
+.Sh HISTORY
+The
+.Nm
+command appears in
+.Bx 4.4 .
--- /dev/null
+/* $NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $ */
+
+/*-
+ * 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.
+ * 3. 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
+ The Regents of the University of California. All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93";
+#endif
+__RCSID("$NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $");
+#endif /* not lint */
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <vis.h>
+
+static void process(FILE *, const char *, int);
+
+int
+main(int argc, char *argv[])
+{
+ FILE *fp;
+ int ch, eflags = 0;
+
+ setprogname(argv[0]);
+ while ((ch = getopt(argc, argv, "eHhm")) != -1)
+ switch((char)ch) {
+ case 'e':
+ eflags |= VIS_NOESCAPE;
+ break;
+ case 'H':
+ eflags |= VIS_HTTP1866;
+ break;
+ case 'h':
+ eflags |= VIS_HTTP1808;
+ break;
+ case 'm':
+ eflags |= VIS_MIMESTYLE;
+ break;
+ case '?':
+ default:
+ (void)fprintf(stderr,
+ "Usage: %s [-e] [-Hh | -m] [file...]\n",
+ getprogname());
+ return EXIT_FAILURE;
+ }
+ argc -= optind;
+ argv += optind;
+
+ switch (eflags & (VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE)) {
+ case VIS_HTTP1808|VIS_MIMESTYLE:
+ case VIS_HTTP1866|VIS_MIMESTYLE:
+ case VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE:
+ errx(EXIT_FAILURE, "Can't mix -m with -h and/or -H");
+ /*NOTREACHED*/
+ default:
+ break;
+ }
+
+ if (*argv)
+ while (*argv) {
+ if ((fp = fopen(*argv, "r")) != NULL)
+ process(fp, *argv, eflags);
+ else
+ warn("%s", *argv);
+ argv++;
+ }
+ else
+ process(stdin, "<stdin>", eflags);
+ return EXIT_SUCCESS;
+}
+
+static void
+process(FILE *fp, const char *filename, int eflags)
+{
+ int offset = 0, c, ret;
+ int state = 0;
+ char outc;
+
+ while ((c = getc(fp)) != EOF) {
+ offset++;
+ again:
+ switch(ret = unvis(&outc, (char)c, &state, eflags)) {
+ case UNVIS_VALID:
+ (void)putchar(outc);
+ break;
+ case UNVIS_VALIDPUSH:
+ (void)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);
+ /* NOTREACHED */
+ }
+ }
+ if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID)
+ (void)putchar(outc);
+}
