Import vis(1) from NetBSD as of 20210621
This commit is contained in:
Warner Losh
parent
584d8a41f5
commit
04751ecc44
43
vis.1
43
vis.1
@ -1,4 +1,4 @@
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.\" $NetBSD: vis.1,v 1.19 2013/03/14 19:17:23 njoly Exp $
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.\" $NetBSD: vis.1,v 1.25 2021/02/20 09:31:51 nia Exp $
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.\"
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.\" Copyright (c) 1989, 1991, 1993, 1994
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.\" The Regents of the University of California. All rights reserved.
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@ -29,7 +29,7 @@
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.\"
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.\" @(#)vis.1 8.4 (Berkeley) 4/19/94
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.\"
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.Dd February 19, 2013
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.Dd February 18, 2021
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.Dt VIS 1
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.Os
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.Sh NAME
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@ -37,7 +37,7 @@
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.Nd display non-printable characters in a visual format
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.Sh SYNOPSIS
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.Nm
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.Op Fl bcfhlmnostw
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.Op Fl bcfhlMmNnoSstw
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.Op Fl e Ar extra
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.Op Fl F Ar foldwidth
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.Op Ar file ...
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@ -99,9 +99,22 @@ Encode using the URI encoding from RFC 1808.
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Mark newlines with the visible sequence
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.Ql \e$ ,
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followed by the newline.
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.It Fl M
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Encode all shell meta characters (implies
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.Fl S ,
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.Fl w ,
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.Fl g )
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.Pq Dv VIS_META
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.It Fl m
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Encode using the MIME Quoted-Printable encoding from RFC 2045.
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.Pq Dv VIS_MIMESTYLE
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.It Fl N
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Turn on the
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.Dv VIS_NOLOCALE
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flag which encodes using the
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.Dq C
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locale, removing any encoding dependencies caused by the current
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locale settings specified in the environment.
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.It Fl n
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Turns off any encoding, except for the fact that backslashes are
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still doubled and hidden newline sequences inserted if
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@ -123,6 +136,9 @@ That is, the output can be unfolded by running the output through
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Request a format which displays non-printable characters as
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an octal number, \eddd.
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.Pq Dv VIS_OCTAL
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.It Fl S
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Encode shell meta-characters that are non-white space or glob.
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.Pq Dv VIS_SHELL
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.It Fl s
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Only characters considered unsafe to send to a terminal are encoded.
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This flag allows backspace, bell, and carriage return in addition
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@ -155,6 +171,25 @@ instead.
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Specify the locale of the input data.
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Set to C if the input data locale is unknown.
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.El
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.Sh EXAMPLES
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Visualize characters encoding white spaces and tabs:
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.Bd -literal -offset indent
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$ printf "\\x10\\n\\t\\n" | vis -w -t
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\\^P\\012\\011\\012
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.Ed
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.Pp
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Same as above but using `\\$' for newline followed by an actual newline:
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.Bd -literal -offset indent
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$ printf "\\x10\\n\\t\\n" | vis -w -t -l
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\\^P\\$
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\\011\\$
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.Ed
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.Pp
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Visualize string using URI encoding:
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.Bd -literal -offset indent
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$ printf https://www.NetBSD.org | vis -h
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https%3a%2f%2fwww.NetBSD.org
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.Ed
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.Sh SEE ALSO
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.Xr unvis 1 ,
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.Xr svis 3 ,
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@ -164,7 +199,7 @@ The
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.Nm
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command appears in
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.Bx 4.4 .
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Myltibyte character support was added in
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Multibyte character support was added in
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.Nx 7.0
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and
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.Fx 9.2 .
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17
vis.c
17
vis.c
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/* $NetBSD: vis.c,v 1.22 2013/02/20 17:04:45 christos Exp $ */
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/* $NetBSD: vis.c,v 1.25 2015/05/24 19:42:39 christos Exp $ */
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/*-
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* Copyright (c) 1989, 1993
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@ -39,7 +39,7 @@ __COPYRIGHT("@(#) Copyright (c) 1989, 1993\
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#if 0
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static char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: vis.c,v 1.22 2013/02/20 17:04:45 christos Exp $");
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__RCSID("$NetBSD: vis.c,v 1.25 2015/05/24 19:42:39 christos Exp $");
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#endif /* not lint */
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#include <stdio.h>
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@ -70,7 +70,7 @@ main(int argc, char *argv[])
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int ch;
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int rval;
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while ((ch = getopt(argc, argv, "bcde:F:fhlmnostw")) != -1)
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while ((ch = getopt(argc, argv, "bcde:F:fhlMmNnoSstw")) != -1)
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switch((char)ch) {
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case 'b':
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eflags |= VIS_NOSLASH;
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@ -102,17 +102,26 @@ main(int argc, char *argv[])
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case 'l':
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markeol++; /* mark end of line with \$ */
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break;
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case 'M':
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eflags |= VIS_META;
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break;
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case 'm':
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eflags |= VIS_MIMESTYLE;
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if (foldwidth == 80)
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foldwidth = 76;
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break;
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case 'N':
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eflags |= VIS_NOLOCALE;
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break;
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case 'n':
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none++;
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break;
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case 'o':
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eflags |= VIS_OCTAL;
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break;
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case 'S':
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eflags |= VIS_SHELL;
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break;
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case 's':
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eflags |= VIS_SAFE;
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break;
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@ -125,7 +134,7 @@ main(int argc, char *argv[])
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case '?':
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default:
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(void)fprintf(stderr,
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"Usage: %s [-bcfhlmnostw] [-e extra]"
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"Usage: %s [-bcfhlMmNnoSstw] [-e extra]"
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" [-F foldwidth] [file ...]\n", getprogname());
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return 1;
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}
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