text: /*	$OpenBSD: print.c,v 1.16 2017/04/28 22:16:43 millert Exp $	*/
  /*	$NetBSD: print.c,v 1.11 1996/05/07 18:20:10 jtc Exp $	*/
  
  /*-
   * Copyright (c) 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.
   */
  
  #include <sys/types.h>
  
  #include <stddef.h>
  #include <stdio.h>
  #include <string.h>
  #include <termios.h>
  #include <unistd.h>
  
  #include "stty.h"
  #include "extern.h"
  
  static void  binit(char *);
  static void  bput(const char *, unsigned int);
  static char *ccval(const struct cchar *, int);
  
  void
  print(struct termios *tp, struct winsize *wp, int ldisc, enum FMT fmt)
  {
  	const struct cchar *p;
  	long tmp;
  	u_char *cc;
  	int cnt, ispeed, ospeed;
  	char buf1[100], buf2[100];
  
  	cnt = 0;
  
  	/* Line discipline. */
  	if (ldisc != N_TTY) {
  		switch(ldisc) {
  		case N_PPP:
  			cnt += printf("ppp disc; ");
  			break;
  		default:
  			cnt += printf("#%d disc; ", ldisc);
  			break;
  		}
  	}
  
  	/* Line speed. */
  	ispeed = cfgetispeed(tp);
  	ospeed = cfgetospeed(tp);
  	if (ispeed != ospeed)
  		cnt +=
  		    printf("ispeed %d baud; ospeed %d baud;", ispeed, ospeed);
  	else
  		cnt += printf("speed %d baud;", ispeed);
  	if (fmt >= BSD)
  		cnt += printf(" %d rows; %d columns;", wp->ws_row, wp->ws_col);
  	if (cnt)
  		(void)printf("\n");
  
  #define	on(f)	((tmp&f) != 0)
  #define put(n, f, d) \
  	if (fmt >= BSD || on(f) != d) \
  		bput(n, on(f));
  
  	/* "local" flags */
  	tmp = tp->c_lflag;
  	binit("lflags");
  	put("-icanon", ICANON, 1);
  	put("-isig", ISIG, 1);
  	put("-iexten", IEXTEN, 1);
  	put("-echo", ECHO, 1);
  	put("-echoe", ECHOE, 0);
  	put("-echok", ECHOK, 0);
  	put("-echoke", ECHOKE, 0);
  	put("-echonl", ECHONL, 0);
  	put("-echoctl", ECHOCTL, 0);
  	put("-echoprt", ECHOPRT, 0);
  	put("-altwerase", VWERASE, 0);
  	put("-noflsh", NOFLSH, 0);
  	put("-tostop", TOSTOP, 0);
  	put("-flusho", FLUSHO, 0);
  	put("-pendin", PENDIN, 0);
  	put("-extproc", EXTPROC, 0);
  	put("-xcase", XCASE, 0);
  
  	/* input flags */
  	tmp = tp->c_iflag;
  	binit("iflags");
  	put("-istrip", ISTRIP, 0);
  	put("-icrnl", ICRNL, 1);
  	put("-inlcr", INLCR, 0);
  	put("-igncr", IGNCR, 0);
  	put("-iuclc", IUCLC, 0);
  	put("-ixon", IXON, 1);
  	put("-ixoff", IXOFF, 0);
  	put("-ixany", IXANY, 1);
  	put("-imaxbel", IMAXBEL, 1);
  	put("-ignbrk", IGNBRK, 0);
  	put("-brkint", BRKINT, 1);
  	put("-inpck", INPCK, 0);
  	put("-ignpar", IGNPAR, 0);
  	put("-parmrk", PARMRK, 0);
  
  	/* output flags */
  	tmp = tp->c_oflag;
  	binit("oflags");
  	put("-opost", OPOST, 1);
  	put("-onlcr", ONLCR, 1);
  	put("-ocrnl", OCRNL, 0);
  	put("-onocr", ONOCR, 0);
  	put("-onlret", ONLRET, 0);
  	put("-olcuc", OLCUC, 0);
  	put("-oxtabs", XTABS, 1);
  
  	/* control flags (hardware state) */
  	tmp = tp->c_cflag;
  	binit("cflags");
  	put("-cread", CREAD, 1);
  	switch(tmp&CSIZE) {
  	case CS5:
  		bput("cs5", 0);
  		break;
  	case CS6:
  		bput("cs6", 0);
  		break;
  	case CS7:
  		bput("cs7", 0);
  		break;
  	case CS8:
  		bput("cs8", 0);
  		break;
  	}
  	bput("-parenb", on(PARENB));
  	put("-parodd", PARODD, 0);
  	put("-hupcl", HUPCL, 1);
  	put("-clocal", CLOCAL, 0);
  	put("-cstopb", CSTOPB, 0);
  	put("-crtscts", CRTSCTS, 0);
  
  	/* special control characters */
  	cc = tp->c_cc;
  	if (fmt == POSIX) {
  		binit("cchars");
  		for (p = cchars1; p->name; ++p) {
  			(void)snprintf(buf1, sizeof(buf1), "%s = %s;",
  			    p->name, ccval(p, cc[p->sub]));
  			bput(buf1, 0);
  		}
  		binit(NULL);
  	} else {
  		binit(NULL);
  		for (p = cchars1, cnt = 0; p->name; ++p) {
  			if (fmt != BSD && cc[p->sub] == p->def)
  				continue;
  #define	WD	"%-8s"
  			(void)snprintf(buf1 + cnt * 8, sizeof(buf1) - cnt * 8,
  			    WD, p->name);
  			(void)snprintf(buf2 + cnt * 8, sizeof(buf2) - cnt * 8,
  			    WD, ccval(p, cc[p->sub]));
  			if (++cnt == LINELENGTH / 8) {
  				cnt = 0;
  				(void)printf("%s\n", buf1);
  				(void)printf("%s\n", buf2);
  			}
  		}
  		if (cnt) {
  			(void)printf("%s\n", buf1);
  			(void)printf("%s\n", buf2);
  		}
  	}
  }
  
  static int col;
  static char *label;
  
  static void
  binit(char *lb)
  {
  
  	if (col) {
  		(void)printf("\n");
  		col = 0;
  	}
  	label = lb;
  }
  
  static void
  bput(const char *s, unsigned int off)
  {
  	s += off;
  
  	if (col == 0) {
  		col = printf("%s: %s", label, s);
  		return;
  	}
  	if ((col + strlen(s)) > LINELENGTH) {
  		(void)printf("\n\t");
  		col = printf("%s", s) + 8;
  		return;
  	}
  	col += printf(" %s", s);
  }
  
  static char *
  ccval(const struct cchar *p, int c)
  {
  	static char buf[5];
  	char *bp;
  
  	if (p->sub == VMIN || p->sub == VTIME) {
  		(void)snprintf(buf, sizeof(buf), "%d", c);
  		return (buf);
  	}
  	if (c == _POSIX_VDISABLE)
  		return ("<undef>");
  	bp = buf;
  	if (c & 0200) {
  		*bp++ = 'M';
  		*bp++ = '-';
  		c &= 0177;
  	}
  	if (c == 0177) {
  		*bp++ = '^';
  		*bp++ = '?';
  	}
  	else if (c < 040) {
  		*bp++ = '^';
  		*bp++ = c + '@';
  	}
  	else
  		*bp++ = c;
  	*bp = '\0';
  	return (buf);
  }
  