Vendor import of NetBSD's unvis(1) at 2013-02-21vendor/NetBSD/unvis/20130221vendor/NetBSD/unvis

3 files changed, 224 insertions, 0 deletions

diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000000..677e61d94d82
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+#	$NetBSD: Makefile,v 1.3 1994/12/06 07:36:07 jtc Exp $
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	unvis
+
+.include <bsd.prog.mk>
diff --git a/unvis.1 b/unvis.1
new file mode 100644
index 000000000000..5c84671552e1
--- /dev/null
+++ b/unvis.1
@@ -0,0 +1,80 @@
+.\"	$NetBSD: unvis.1,v 1.10 2012/12/15 02:08:13 uwe 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 entity references and numeric character references 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 .
diff --git a/unvis.c b/unvis.c
new file mode 100644
index 000000000000..d854a3731171
--- /dev/null
+++ b/unvis.c
@@ -0,0 +1,138 @@
+/*	$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);
+}