Vendor import of NetBSD's unvis(1) at 2013-02-21
This commit is contained in:
commit
e95bfcdd03
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/vendor/NetBSD/unvis/dist/; revision=247131 svn path=/vendor/NetBSD/unvis/20132102/; revision=247132; tag=vendor/NetBSD/unvis/20130221
6
Makefile
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6
Makefile
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# $NetBSD: Makefile,v 1.3 1994/12/06 07:36:07 jtc Exp $
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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PROG= unvis
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.include <bsd.prog.mk>
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80
unvis.1
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unvis.1
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.\" $NetBSD: unvis.1,v 1.10 2012/12/15 02:08:13 uwe Exp $
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.\"
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.\" Copyright (c) 1989, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)unvis.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd November 27, 2010
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.Dt UNVIS 1
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.Os
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.Sh NAME
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.Nm unvis
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.Nd "revert a visual representation of data back to original form"
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.Sh SYNOPSIS
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.Nm
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.Op Fl e
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.Op Fl Hh | Fl m
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.Op Ar file ...
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.Sh DESCRIPTION
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.Nm
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is the inverse function of
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.Xr vis 1 .
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It reverts
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a visual representation of data back to its original form on standard output.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl e
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Don't decode \e escaped sequences.
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.It Fl H
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Decode entity references and numeric character references from RFC 1866.
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.Pq Dv VIS_HTTP1866
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.It Fl h
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Decode using the URI encoding from RFC 1808.
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.Pq Dv VIS_HTTP1808
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.It Fl m
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Decode using mime style.
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.Pq Dv VIS_MIMESTYLE
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.El
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.Pp
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Mixing
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.Fl h
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or
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.Fl H
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with
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.Fl m
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is not supported.
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.Sh SEE ALSO
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.Xr vis 1 ,
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.Xr unvis 3 ,
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.Xr vis 3
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.Sh HISTORY
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The
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.Nm
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command appears in
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.Bx 4.4 .
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138
unvis.c
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138
unvis.c
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/* $NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $ */
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/*-
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: unvis.c,v 1.13 2010/11/27 19:46:25 christos Exp $");
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#endif /* not lint */
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <vis.h>
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static void process(FILE *, const char *, int);
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int
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main(int argc, char *argv[])
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{
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FILE *fp;
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int ch, eflags = 0;
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setprogname(argv[0]);
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while ((ch = getopt(argc, argv, "eHhm")) != -1)
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switch((char)ch) {
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case 'e':
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eflags |= VIS_NOESCAPE;
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break;
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case 'H':
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eflags |= VIS_HTTP1866;
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break;
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case 'h':
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eflags |= VIS_HTTP1808;
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break;
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case 'm':
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eflags |= VIS_MIMESTYLE;
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break;
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case '?':
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default:
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(void)fprintf(stderr,
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"Usage: %s [-e] [-Hh | -m] [file...]\n",
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getprogname());
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return EXIT_FAILURE;
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}
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argc -= optind;
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argv += optind;
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switch (eflags & (VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE)) {
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case VIS_HTTP1808|VIS_MIMESTYLE:
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case VIS_HTTP1866|VIS_MIMESTYLE:
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case VIS_HTTP1808|VIS_HTTP1866|VIS_MIMESTYLE:
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errx(EXIT_FAILURE, "Can't mix -m with -h and/or -H");
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/*NOTREACHED*/
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default:
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break;
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}
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if (*argv)
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while (*argv) {
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if ((fp = fopen(*argv, "r")) != NULL)
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process(fp, *argv, eflags);
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else
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warn("%s", *argv);
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argv++;
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}
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else
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process(stdin, "<stdin>", eflags);
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return EXIT_SUCCESS;
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}
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static void
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process(FILE *fp, const char *filename, int eflags)
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{
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int offset = 0, c, ret;
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int state = 0;
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char outc;
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while ((c = getc(fp)) != EOF) {
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offset++;
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again:
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switch(ret = unvis(&outc, (char)c, &state, eflags)) {
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case UNVIS_VALID:
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(void)putchar(outc);
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break;
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case UNVIS_VALIDPUSH:
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(void)putchar(outc);
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goto again;
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case UNVIS_SYNBAD:
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warnx("%s: offset: %d: can't decode", filename, offset);
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state = 0;
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break;
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case 0:
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case UNVIS_NOCHAR:
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break;
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default:
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errx(1, "bad return value (%d), can't happen", ret);
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/* NOTREACHED */
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}
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}
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if (unvis(&outc, (char)0, &state, eflags | UNVIS_END) == UNVIS_VALID)
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(void)putchar(outc);
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}
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