238 lines
6.0 KiB
C
238 lines
6.0 KiB
C
/*-
|
|
* Copyright (c) 2002 Tim J. Robbins.
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*/
|
|
|
|
/*
|
|
* tabs -- set terminal tabs
|
|
*
|
|
* This utility displays a series of characters that clears the terminal
|
|
* hardware tab settings, then initialises them to specified values,
|
|
* and optionally sets a soft margin.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/tty.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <locale.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <term.h>
|
|
#include <unistd.h>
|
|
|
|
/* Maximum number of tab stops allowed in table. */
|
|
#define NSTOPS 20
|
|
|
|
#define NELEMS(a) (sizeof(a) / sizeof(a[0]))
|
|
|
|
/* Predefined formats, taken from IEEE Std 1003.1-2001. */
|
|
static const struct {
|
|
const char *name; /* Format name used on cmd. line */
|
|
long stops[NSTOPS]; /* Column positions */
|
|
} formats[] = {
|
|
{ "a", { 1, 10, 16, 36, 72 } },
|
|
{ "a2", { 1, 10, 16, 40, 72 } },
|
|
{ "c", { 1, 8, 12, 16, 20, 55 } },
|
|
{ "c2", { 1, 6, 10, 14, 49 } },
|
|
{ "c3", { 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58,
|
|
62, 67 } },
|
|
{ "f", { 1, 7, 11, 15, 19, 23 } },
|
|
{ "p", { 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57,
|
|
61 } },
|
|
{ "s", { 1, 10, 55 } },
|
|
{ "u", { 1, 12, 20, 44 } }
|
|
};
|
|
|
|
static void gettabs(char *, long *, long *);
|
|
static int ttywidth(void);
|
|
static void usage(void);
|
|
|
|
int
|
|
main(int argc __unused, char *argv[])
|
|
{
|
|
long cols, i, inc, j, margin, nstops, stops[NSTOPS];
|
|
const char *cr, *ct, *st, *ML;
|
|
char area[1024], *ap, *arg, *end;
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
inc = 8;
|
|
margin = 0;
|
|
nstops = -1;
|
|
while ((arg = *++argv) != NULL && (*arg == '-' || *arg == '+')) {
|
|
if (*arg == '+') {
|
|
/* +m[n] or +[n] */
|
|
if (*++arg == 'm')
|
|
arg++;
|
|
if (*arg != '\0') {
|
|
errno = 0;
|
|
margin = strtol(arg, &end, 10);
|
|
if (errno != 0 || *end != '\0' || margin < 0)
|
|
errx(1, "%s: invalid margin width",
|
|
arg);
|
|
} else
|
|
margin = 10;
|
|
} else if (isdigit(arg[1])) {
|
|
/* -n */
|
|
errno = 0;
|
|
inc = strtol(arg + 1, &end, 10);
|
|
if (errno != 0 || *end != '\0' || inc < 0)
|
|
errx(1, "%s: invalid increment", arg + 1);
|
|
} else if (arg[1] == 'T') {
|
|
/* -Ttype or -T type */
|
|
if (arg[2] != '\0')
|
|
setenv("TERM", arg + 2, 1);
|
|
else {
|
|
if ((arg = *++argv) == NULL)
|
|
usage();
|
|
setenv("TERM", arg, 1);
|
|
}
|
|
} else if (arg[1] == '-') {
|
|
arg = *++argv;
|
|
break;
|
|
} else {
|
|
/* Predefined format */
|
|
for (i = 0; i < (int)NELEMS(formats); i++)
|
|
if (strcmp(formats[i].name, arg + 1) == 0)
|
|
break;
|
|
if (i == NELEMS(formats))
|
|
usage();
|
|
for (j = nstops = 0; j < NSTOPS &&
|
|
formats[i].stops[j] != 0; j++)
|
|
stops[nstops++] = formats[i].stops[j];
|
|
}
|
|
}
|
|
|
|
if (arg != NULL) {
|
|
if (nstops != -1)
|
|
usage();
|
|
gettabs(arg, stops, &nstops);
|
|
}
|
|
|
|
/* Initialise terminal, get the strings we need */
|
|
setupterm(NULL, 1, NULL);
|
|
ap = area;
|
|
if ((ct = tgetstr("ct", &ap)) == NULL)
|
|
errx(1, "terminal cannot clear tabs");
|
|
if ((st = tgetstr("st", &ap)) == NULL)
|
|
errx(1, "terminal cannot set tabs");
|
|
if ((cr = tgetstr("cr", &ap)) == NULL)
|
|
cr = "\r";
|
|
ML = tgetstr("ML", &ap);
|
|
cols = ttywidth();
|
|
|
|
/* Clear all tabs. */
|
|
putp(cr);
|
|
putp(ct);
|
|
|
|
/*
|
|
* Set soft margin.
|
|
* XXX Does this actually work?
|
|
*/
|
|
if (ML != NULL) {
|
|
printf("%*s", (int)margin, "");
|
|
putp(ML);
|
|
} else if (margin != 0)
|
|
warnx("terminal cannot set left margin");
|
|
|
|
/* Optionally output new tab stops. */
|
|
if (nstops >= 0) {
|
|
printf("%*s", (int)stops[0] - 1, "");
|
|
putp(st);
|
|
for (i = 1; i < nstops; i++) {
|
|
printf("%*s", (int)(stops[i] - stops[i - 1]), "");
|
|
putp(st);
|
|
}
|
|
} else if (inc > 0) {
|
|
for (i = 0; i < cols / inc; i++) {
|
|
putp(st);
|
|
printf("%*s", (int)inc, "");
|
|
}
|
|
putp(st);
|
|
}
|
|
putp(cr);
|
|
|
|
exit(0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr,
|
|
"usage: tabs [-n|-a|-a2|-c|-c2|-c3|-f|-p|-s|-u] [+m[n]] [-T type]\n");
|
|
fprintf(stderr,
|
|
" tabs [-T type] [+[n]] n1,[n2,...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
static void
|
|
gettabs(char *arg, long stops[], long *nstops)
|
|
{
|
|
char *tok, *end;
|
|
long last, stop;
|
|
|
|
for (last = *nstops = 0, tok = strtok(arg, ","); tok != NULL;
|
|
tok = strtok(NULL, ",")) {
|
|
if (*nstops >= NSTOPS)
|
|
errx(1, "too many tab stops (limit %d)", NSTOPS);
|
|
errno = 0;
|
|
stop = strtol(tok, &end, 10);
|
|
if (errno != 0 || *end != '\0' || stop <= 0)
|
|
errx(1, "%s: invalid tab stop", tok);
|
|
if (*tok == '+') {
|
|
if (tok == arg)
|
|
errx(1, "%s: first tab may not be relative",
|
|
tok);
|
|
stop += last;
|
|
}
|
|
if (last > stop)
|
|
errx(1, "cannot go backwards");
|
|
last = stops[(*nstops)++] = stop;
|
|
}
|
|
}
|
|
|
|
static int
|
|
ttywidth(void)
|
|
{
|
|
struct winsize ws;
|
|
int width;
|
|
|
|
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1)
|
|
width = ws.ws_col;
|
|
else if ((width = tgetnum("co")) == 0) {
|
|
width = 80;
|
|
warnx("cannot find terminal width; defaulted to %d", width);
|
|
}
|
|
|
|
return (width);
|
|
}
|