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Vendor import of NetBSD's vis(1) at 2013-02-21

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Brooks Davis 2013-02-21 20:44:53 +00:00
commit 7fc1dbca01
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7
Makefile Normal file
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# $NetBSD: Makefile,v 1.3 1994/11/17 07:55:57 jtc Exp $
# @(#)Makefile 8.1 (Berkeley) 6/6/93
PROG= vis
SRCS= vis.c foldit.c
.include <bsd.prog.mk>

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extern.h Normal file
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/* $NetBSD: extern.h,v 1.1 2009/02/10 23:06:31 christos Exp $ */
/*-
* Copyright (c) 2009 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
int foldit(const char *, int, int, int);

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/* $NetBSD: foldit.c,v 1.7 2009/02/10 23:06:31 christos Exp $ */
/*-
* Copyright (c) 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)foldit.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: foldit.c,v 1.7 2009/02/10 23:06:31 christos Exp $");
#endif /* not lint */
#include <stdio.h>
#include <vis.h>
#include "extern.h"
int
foldit(const char *chunk, int col, int max, int flags)
{
const char *cp;
/*
* Keep track of column position. Insert hidden newline
* if this chunk puts us over the limit.
*/
again:
cp = chunk;
while (*cp) {
switch(*cp) {
case '\n':
case '\r':
col = 0;
break;
case '\t':
col = (col + 8) &~ 07;
break;
case '\b':
col = col ? col - 1 : 0;
break;
default:
col++;
}
if (col > (max - 2)) {
printf(flags & VIS_MIMESTYLE ? "=\n" : "\\\n");
col = 0;
goto again;
}
cp++;
}
return (col);
}

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vis.1 Normal file
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.\" $NetBSD: vis.1,v 1.17 2013/02/14 14:00:00 christos Exp $
.\"
.\" Copyright (c) 1989, 1991, 1993, 1994
.\" 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.
.\"
.\" @(#)vis.1 8.4 (Berkeley) 4/19/94
.\"
.Dd February 13, 2013
.Dt VIS 1
.Os
.Sh NAME
.Nm vis
.Nd display non-printable characters in a visual format
.Sh SYNOPSIS
.Nm
.Op Fl bcfhlmnostw
.Op Fl e Ar extra
.Op Fl F Ar foldwidth
.Op Ar file ...
.Sh DESCRIPTION
.Nm
is a filter for converting non-printable characters
into a visual representation.
It differs from
.Ql cat -v
in that
the form is unique and invertible.
By default, all non-graphic
characters except space, tab, and newline are encoded.
A detailed description of the
various visual formats is given in
.Xr vis 3 .
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl b
Turns off prepending of backslash before up-arrow control sequences
and meta characters, and disables the doubling of backslashes.
This
produces output which is neither invertible or precise, but does
represent a minimum of change to the input.
It is similar to
.Dq Li cat -v .
.Pq Dv VIS_NOSLASH
.It Fl c
Request a format which displays a small subset of the
non-printable characters using C-style backslash sequences.
.Pq Dv VIS_CSTYLE
.It Fl e Ar extra
Also encode characters in
.Ar extra ,
per
.Xr svis 3 .
.It Fl F Ar foldwidth
Causes
.Nm
to fold output lines to foldwidth columns (default 80), like
.Xr fold 1 ,
except
that a hidden newline sequence is used, (which is removed
when inverting the file back to its original form with
.Xr unvis 1 ) .
If the last character in the encoded file does not end in a newline,
a hidden newline sequence is appended to the output.
This makes
the output usable with various editors and other utilities which
typically don't work with partial lines.
.It Fl f
Same as
.Fl F .
.It Fl h
Encode using the URI encoding from RFC 1808.
.Pq Dv VIS_HTTPSTYLE
.It Fl l
Mark newlines with the visible sequence
.Ql \e$ ,
followed by the newline.
.It Fl m
Encode using the MIME Quoted-Printable encoding from RFC 2045.
.Pq Dv VIS_MIMESTYLE
.It Fl n
Turns off any encoding, except for the fact that backslashes are
still doubled and hidden newline sequences inserted if
.Fl f
or
.Fl F
is selected.
When combined with the
.Fl f
flag,
.Nm
becomes like
an invertible version of the
.Xr fold 1
utility.
That is, the output can be unfolded by running the output through
.Xr unvis 1 .
.It Fl o
Request a format which displays non-printable characters as
an octal number, \eddd.
.Pq Dv VIS_OCTAL
.It Fl s
Only characters considered unsafe to send to a terminal are encoded.
This flag allows backspace, bell, and carriage return in addition
to the default space, tab and newline.
.Pq Dv VIS_SAFE
.It Fl t
Tabs are also encoded.
.Pq Dv VIS_TAB
.It Fl w
White space (space-tab-newline) is also encoded.
.Pq Dv VIS_WHITE
.El
.Sh MULTIBYTE CHARACTER SUPPORT
.Nm
supports multibyte character input.
The encoding conversion is influenced by the setting of the
.Ev LC_CTYPE
environment variable which defines the set of characters that can be
copied without encoding.
.Pp
When 8-bit data is present in the input,
.Ev LC_CTYPE
must be set to the correct locale or to the C locale.
If the locales of the data and the conversion are mismatched, multibyte
character recognition may fail and encoding will be performed byte-by-byte
instead.
.Sh ENVIRONMENT
.Bl -tag -width ".Ev LC_CTYPE"
.It Ev LC_CTYPE
Specify the locale of the input data.
Set to C if the input data locale is unknown.
.Sh SEE ALSO
.Xr unvis 1 ,
.Xr svis 3 ,
.Xr vis 3
.Sh HISTORY
The
.Nm
command appears in
.Bx 4.4 .
Myltibyte character support was added in
.Nx 6.1
and
.Fx 9.2 .

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/* $NetBSD: vis.c,v 1.22 2013/02/20 17:04:45 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[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: vis.c,v 1.22 2013/02/20 17:04:45 christos Exp $");
#endif /* not lint */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <wchar.h>
#include <limits.h>
#include <unistd.h>
#include <err.h>
#include <vis.h>
#include "extern.h"
static int eflags, fold, foldwidth = 80, none, markeol;
#ifdef DEBUG
int debug;
#endif
static const char *extra = "";
static void process(FILE *);
int
main(int argc, char *argv[])
{
FILE *fp;
int ch;
int rval;
while ((ch = getopt(argc, argv, "bcde:F:fhlmnostw")) != -1)
switch((char)ch) {
case 'b':
eflags |= VIS_NOSLASH;
break;
case 'c':
eflags |= VIS_CSTYLE;
break;
#ifdef DEBUG
case 'd':
debug++;
break;
#endif
case 'e':
extra = optarg;
break;
case 'F':
if ((foldwidth = atoi(optarg)) < 5) {
errx(1, "can't fold lines to less than 5 cols");
/* NOTREACHED */
}
markeol++;
break;
case 'f':
fold++; /* fold output lines to 80 cols */
break; /* using hidden newline */
case 'h':
eflags |= VIS_HTTPSTYLE;
break;
case 'l':
markeol++; /* mark end of line with \$ */
break;
case 'm':
eflags |= VIS_MIMESTYLE;
if (foldwidth == 80)
foldwidth = 76;
break;
case 'n':
none++;
break;
case 'o':
eflags |= VIS_OCTAL;
break;
case 's':
eflags |= VIS_SAFE;
break;
case 't':
eflags |= VIS_TAB;
break;
case 'w':
eflags |= VIS_WHITE;
break;
case '?':
default:
(void)fprintf(stderr,
"Usage: %s [-bcfhlmnostw] [-e extra]"
" [-F foldwidth] [file ...]\n", getprogname());
return 1;
}
if ((eflags & (VIS_HTTPSTYLE|VIS_MIMESTYLE)) ==
(VIS_HTTPSTYLE|VIS_MIMESTYLE))
errx(1, "Can't specify -m and -h at the same time");
argc -= optind;
argv += optind;
rval = 0;
if (*argv)
while (*argv) {
if ((fp = fopen(*argv, "r")) != NULL) {
process(fp);
(void)fclose(fp);
} else {
warn("%s", *argv);
rval = 1;
}
argv++;
}
else
process(stdin);
return rval;
}
static void
process(FILE *fp)
{
static int col = 0;
static char nul[] = "\0";
char *cp = nul + 1; /* so *(cp-1) starts out != '\n' */
wint_t c, c1, rachar;
char mbibuff[2 * MB_LEN_MAX + 1]; /* max space for 2 wchars */
char buff[4 * MB_LEN_MAX + 1]; /* max encoding length for one char */
int mbilen, cerr = 0, raerr = 0;
/*
* The input stream is considered to be multibyte characters.
* The input loop will read this data inputing one character,
* possibly multiple bytes, at a time and converting each to
* a wide character wchar_t.
*
* The vis(3) functions, however, require single either bytes
* or a multibyte string as their arguments. So we convert
* our input wchar_t and the following look-ahead wchar_t to
* a multibyte string for processing by vis(3).
*/
/* Read one multibyte character, store as wchar_t */
c = getwc(fp);
if (c == WEOF && errno == EILSEQ) {
/* Error in multibyte data. Read one byte. */
c = (wint_t)getc(fp);
cerr = 1;
}
while (c != WEOF) {
/* Clear multibyte input buffer. */
memset(mbibuff, 0, sizeof(mbibuff));
/* Read-ahead next multibyte character. */
if (!cerr)
rachar = getwc(fp);
if (cerr || (rachar == WEOF && errno == EILSEQ)) {
/* Error in multibyte data. Read one byte. */
rachar = (wint_t)getc(fp);
raerr = 1;
}
if (none) {
/* Handle -n flag. */
cp = buff;
*cp++ = c;
if (c == '\\')
*cp++ = '\\';
*cp = '\0';
} else if (markeol && c == '\n') {
/* Handle -l flag. */
cp = buff;
if ((eflags & VIS_NOSLASH) == 0)
*cp++ = '\\';
*cp++ = '$';
*cp++ = '\n';
*cp = '\0';
} else {
/*
* Convert character using vis(3) library.
* At this point we will process one character.
* But we must pass the vis(3) library this
* character plus the next one because the next
* one is used as a look-ahead to decide how to
* encode this one under certain circumstances.
*
* Since our characters may be multibyte, e.g.,
* in the UTF-8 locale, we cannot use vis() and
* svis() which require byte input, so we must
* create a multibyte string and use strvisx().
*/
/* Treat EOF as a NUL char. */
c1 = rachar;
if (c1 == WEOF)
c1 = L'\0';
/*
* If we hit a multibyte conversion error above,
* insert byte directly into string buff because
* wctomb() will fail. Else convert wchar_t to
* multibyte using wctomb().
*/
if (cerr) {
*mbibuff = (char)c;
mbilen = 1;
} else
mbilen = wctomb(mbibuff, c);
/* Same for look-ahead character. */
if (raerr)
mbibuff[mbilen] = (char)c1;
else
wctomb(mbibuff + mbilen, c1);
/* Perform encoding on just first character. */
(void) strsenvisx(buff, 4 * MB_LEN_MAX, mbibuff,
1, eflags, extra, &cerr);
}
cp = buff;
if (fold) {
#ifdef DEBUG
if (debug)
(void)printf("<%02d,", col);
#endif
col = foldit(cp, col, foldwidth, eflags);
#ifdef DEBUG
if (debug)
(void)printf("%02d>", col);
#endif
}
do {
(void)putchar(*cp);
} while (*++cp);
c = rachar;
cerr = raerr;
}
/*
* terminate partial line with a hidden newline
*/
if (fold && *(cp - 1) != '\n')
(void)printf(eflags & VIS_MIMESTYLE ? "=\n" : "\\\n");
}