diff options
Diffstat (limited to 'text_cmds/vis')
| -rw-r--r-- | text_cmds/vis/extern.h | 36 | ||||
| -rw-r--r-- | text_cmds/vis/foldit.c | 82 | ||||
| -rw-r--r-- | text_cmds/vis/vis.1 | 140 | ||||
| -rw-r--r-- | text_cmds/vis/vis.c | 194 |
4 files changed, 452 insertions, 0 deletions
diff --git a/text_cmds/vis/extern.h b/text_cmds/vis/extern.h new file mode 100644 index 0000000..bc7de9b --- /dev/null +++ b/text_cmds/vis/extern.h @@ -0,0 +1,36 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + * + * $FreeBSD: src/usr.bin/vis/extern.h,v 1.2 2002/03/22 01:42:42 imp Exp $ + */ + +extern int foldit(char *, int, int); diff --git a/text_cmds/vis/foldit.c b/text_cmds/vis/foldit.c new file mode 100644 index 0000000..70cba4a --- /dev/null +++ b/text_cmds/vis/foldit.c @@ -0,0 +1,82 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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> + +__FBSDID("$FreeBSD: src/usr.bin/vis/foldit.c,v 1.6 2001/12/11 23:02:44 markm Exp $"); + +#ifndef lint +static const char sccsid[] = "@(#)foldit.c 8.1 (Berkeley) 6/6/93"; +#endif + +#include <stdio.h> + +#include "extern.h" + +int +foldit(chunk, col, max) + char *chunk; + int col, max; +{ + 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("\\\n"); + col = 0; + goto again; + } + cp++; + } + return (col); +} diff --git a/text_cmds/vis/vis.1 b/text_cmds/vis/vis.1 new file mode 100644 index 0000000..093e382 --- /dev/null +++ b/text_cmds/vis/vis.1 @@ -0,0 +1,140 @@ +.\" 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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 +.\" $FreeBSD: src/usr.bin/vis/vis.1,v 1.12 2005/02/13 22:25:25 ru Exp $ +.\" +.Dd June 25, 2004 +.Dt VIS 1 +.Os +.Sh NAME +.Nm vis +.Nd display non-printable characters in a visual format +.Sh SYNOPSIS +.Nm +.Op Fl cbflnostw +.Op Fl F Ar foldwidth +.Op Ar +.Sh DESCRIPTION +The +.Nm +utility 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 . +.It Fl c +Request a format which displays a small subset of the +non-printable characters using C-style backslash sequences. +.It Fl F +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 do not work with partial lines. +.It Fl f +Same as +.Fl F . +.It Fl l +Mark newlines with the visible sequence +.Ql \e$ , +followed by the newline. +.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. +.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. +.It Fl t +Tabs are also encoded. +.It Fl w +White space (space-tab-newline) is also encoded. +.El +.Sh SEE ALSO +.Xr unvis 1 , +.Xr vis 3 +.Sh HISTORY +The +.Nm +command appeared in +.Bx 4.4 . +.Sh BUGS +Due to limitations in the underlying +.Xr vis 3 +function, the +.Nm +utility +does not recognize multibyte characters, and thus may consider them to be +non-printable when they are in fact printable (and vice versa). diff --git a/text_cmds/vis/vis.c b/text_cmds/vis/vis.c new file mode 100644 index 0000000..703dec5 --- /dev/null +++ b/text_cmds/vis/vis.c @@ -0,0 +1,194 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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> + +__FBSDID("$FreeBSD: src/usr.bin/vis/vis.c,v 1.10 2002/09/04 23:29:09 dwmalone Exp $"); + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#ifndef lint +static const char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93"; +#endif + +#include <err.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <vis.h> +#include <sysexits.h> + +#include "extern.h" + +int eflags, fold, foldwidth=80, none, markeol, debug; + +void process(FILE *); +static void usage(void); + +int +main(int argc, char *argv[]) +{ + FILE *fp; + int ch; + + (void) setlocale(LC_CTYPE, ""); + + while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != -1) + switch((char)ch) { + case 'n': + none++; + break; + case 'w': + eflags |= VIS_WHITE; + break; + case 'c': + eflags |= VIS_CSTYLE; + break; + case 't': + eflags |= VIS_TAB; + break; + case 's': + eflags |= VIS_SAFE; + break; + case 'o': + eflags |= VIS_OCTAL; + break; + case 'b': + eflags |= VIS_NOSLASH; + break; + case 'F': + if ((foldwidth = atoi(optarg))<5) + errx(1, "can't fold lines to less than 5 cols"); + /*FALLTHROUGH*/ + case 'f': + fold++; /* fold output lines to 80 cols */ + break; /* using hidden newline */ + case 'l': + markeol++; /* mark end of line with \$ */ + break; +#ifdef DEBUG + case 'd': + debug++; + break; +#endif + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (*argv) + while (*argv) { + if ((fp=fopen(*argv, "r")) != NULL) + process(fp); + else + warn("%s", *argv); + argv++; + } + else + process(stdin); + exit(0); +} + + +static void +usage(void) +{ +#ifdef DEBUG + fprintf(stderr, "usage: vis [-cbflnostwd] [-F foldwidth] [file ...]\n"); +#else + fprintf(stderr, "usage: vis [-cbflnostw] [-F foldwidth] [file ...]\n"); +#endif + exit(1); +} + +void +process(FILE *fp) +{ + static int col = 0; + static char dummy[] = "\0"; + char *cp = dummy+1; /* so *(cp-1) starts out != '\n' */ + int c, rachar; + char buff[5]; + + c = getc(fp); + while (c != EOF) { + rachar = getc(fp); + if (none) { + cp = buff; + *cp++ = c; + if (c == '\\') + *cp++ = '\\'; + *cp = '\0'; + } else if (markeol && c == '\n') { + cp = buff; + if ((eflags & VIS_NOSLASH) == 0) + *cp++ = '\\'; + *cp++ = '$'; + *cp++ = '\n'; + *cp = '\0'; + } else + (void) vis(buff, (char)c, eflags, (char)rachar); + + cp = buff; + if (fold) { +#ifdef DEBUG + if (debug) + printf("<%02d,", col); +#endif + col = foldit(cp, col, foldwidth); +#ifdef DEBUG + if (debug) + printf("%02d>", col); +#endif + } + do { + putchar(*cp); + } while (*++cp); + c = rachar; + } + /* + * terminate partial line with a hidden newline + */ + if (fold && *(cp-1) != '\n') + printf("\\\n"); + + if (ferror(fp)) + errx(EX_IOERR, NULL); +} |