1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
240 lines
6.0 KiB
C
240 lines
6.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002 Tim J. Robbins.
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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/*
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* tabs -- set terminal tabs
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*
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* This utility displays a series of characters that clears the terminal
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* hardware tab settings, then initialises them to specified values,
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* and optionally sets a soft margin.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/tty.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <term.h>
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#include <unistd.h>
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/* Maximum number of tab stops allowed in table. */
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#define NSTOPS 20
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#define NELEMS(a) (sizeof(a) / sizeof(a[0]))
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/* Predefined formats, taken from IEEE Std 1003.1-2001. */
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static const struct {
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const char *name; /* Format name used on cmd. line */
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long stops[NSTOPS]; /* Column positions */
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} formats[] = {
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{ "a", { 1, 10, 16, 36, 72 } },
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{ "a2", { 1, 10, 16, 40, 72 } },
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{ "c", { 1, 8, 12, 16, 20, 55 } },
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{ "c2", { 1, 6, 10, 14, 49 } },
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{ "c3", { 1, 6, 10, 14, 18, 22, 26, 30, 34, 38, 42, 46, 50, 54, 58,
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62, 67 } },
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{ "f", { 1, 7, 11, 15, 19, 23 } },
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{ "p", { 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57,
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61 } },
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{ "s", { 1, 10, 55 } },
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{ "u", { 1, 12, 20, 44 } }
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};
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static void gettabs(char *, long *, long *);
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static int ttywidth(void);
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static void usage(void);
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int
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main(int argc __unused, char *argv[])
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{
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long cols, i, inc, j, margin, nstops, stops[NSTOPS];
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const char *cr, *ct, *st, *ML;
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char area[1024], *ap, *arg, *end;
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setlocale(LC_ALL, "");
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inc = 8;
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margin = 0;
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nstops = -1;
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while ((arg = *++argv) != NULL && (*arg == '-' || *arg == '+')) {
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if (*arg == '+') {
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/* +m[n] or +[n] */
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if (*++arg == 'm')
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arg++;
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if (*arg != '\0') {
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errno = 0;
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margin = strtol(arg, &end, 10);
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if (errno != 0 || *end != '\0' || margin < 0)
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errx(1, "%s: invalid margin width",
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arg);
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} else
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margin = 10;
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} else if (isdigit(arg[1])) {
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/* -n */
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errno = 0;
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inc = strtol(arg + 1, &end, 10);
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if (errno != 0 || *end != '\0' || inc < 0)
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errx(1, "%s: invalid increment", arg + 1);
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} else if (arg[1] == 'T') {
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/* -Ttype or -T type */
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if (arg[2] != '\0')
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setenv("TERM", arg + 2, 1);
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else {
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if ((arg = *++argv) == NULL)
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usage();
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setenv("TERM", arg, 1);
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}
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} else if (arg[1] == '-') {
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arg = *++argv;
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break;
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} else {
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/* Predefined format */
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for (i = 0; i < (int)NELEMS(formats); i++)
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if (strcmp(formats[i].name, arg + 1) == 0)
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break;
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if (i == NELEMS(formats))
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usage();
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for (j = nstops = 0; j < NSTOPS &&
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formats[i].stops[j] != 0; j++)
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stops[nstops++] = formats[i].stops[j];
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}
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}
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if (arg != NULL) {
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if (nstops != -1)
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usage();
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gettabs(arg, stops, &nstops);
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}
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/* Initialise terminal, get the strings we need */
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setupterm(NULL, 1, NULL);
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ap = area;
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if ((ct = tgetstr("ct", &ap)) == NULL)
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errx(1, "terminal cannot clear tabs");
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if ((st = tgetstr("st", &ap)) == NULL)
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errx(1, "terminal cannot set tabs");
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if ((cr = tgetstr("cr", &ap)) == NULL)
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cr = "\r";
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ML = tgetstr("ML", &ap);
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cols = ttywidth();
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/* Clear all tabs. */
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putp(cr);
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putp(ct);
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/*
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* Set soft margin.
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* XXX Does this actually work?
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*/
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if (ML != NULL) {
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printf("%*s", (int)margin, "");
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putp(ML);
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} else if (margin != 0)
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warnx("terminal cannot set left margin");
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/* Optionally output new tab stops. */
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if (nstops >= 0) {
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printf("%*s", (int)stops[0] - 1, "");
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putp(st);
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for (i = 1; i < nstops; i++) {
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printf("%*s", (int)(stops[i] - stops[i - 1]), "");
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putp(st);
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}
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} else if (inc > 0) {
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for (i = 0; i < cols / inc; i++) {
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putp(st);
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printf("%*s", (int)inc, "");
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}
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putp(st);
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}
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putp(cr);
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exit(0);
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: tabs [-n|-a|-a2|-c|-c2|-c3|-f|-p|-s|-u] [+m[n]] [-T type]\n");
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fprintf(stderr,
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" tabs [-T type] [+[n]] n1,[n2,...]\n");
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exit(1);
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}
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static void
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gettabs(char *arg, long stops[], long *nstops)
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{
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char *tok, *end;
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long last, stop;
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for (last = *nstops = 0, tok = strtok(arg, ","); tok != NULL;
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tok = strtok(NULL, ",")) {
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if (*nstops >= NSTOPS)
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errx(1, "too many tab stops (limit %d)", NSTOPS);
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errno = 0;
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stop = strtol(tok, &end, 10);
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if (errno != 0 || *end != '\0' || stop <= 0)
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errx(1, "%s: invalid tab stop", tok);
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if (*tok == '+') {
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if (tok == arg)
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errx(1, "%s: first tab may not be relative",
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tok);
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stop += last;
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}
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if (last > stop)
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errx(1, "cannot go backwards");
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last = stops[(*nstops)++] = stop;
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}
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}
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static int
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ttywidth(void)
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{
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struct winsize ws;
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int width;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1)
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width = ws.ws_col;
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else if ((width = tgetnum("co")) == 0) {
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width = 80;
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warnx("cannot find terminal width; defaulted to %d", width);
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}
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return (width);
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}
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