bin/stty/stty.c

   1 /*-
   2  * Copyright (c) 1989, 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1989, 1991, 1993, 1994 The Regents of the University of California.  All rights reserved.
  30  * @(#)stty.c   8.3 (Berkeley) 4/2/94
  31  * $FreeBSD: src/bin/stty/stty.c,v 1.13.2.2 2001/07/04 22:40:00 kris Exp $
  32  */
  33
  34 #include <sys/types.h>
  35
  36 #include <ctype.h>
  37 #include <err.h>
  38 #include <errno.h>
  39 #include <fcntl.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44
  45 #include "stty.h"
  46 #include "extern.h"
  47
  48 int
  49 main(int argc, char **argv)
  50 {
  51         struct info i;
  52         enum FMT fmt;
  53         int ch;
  54
  55         fmt = NOTSET;
  56         i.fd = STDIN_FILENO;
  57
  58         opterr = 0;
  59         while (optind < argc &&
  60             strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
  61             (ch = getopt(argc, argv, "aef:g")) != -1)
  62                 switch(ch) {
  63                 case 'a':               /* undocumented: POSIX compatibility */
  64                         fmt = POSIX;
  65                         break;
  66                 case 'e':
  67                         fmt = BSD;
  68                         break;
  69                 case 'f':
  70                         if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
  71                                 err(1, "%s", optarg);
  72                         break;
  73                 case 'g':
  74                         fmt = GFLAG;
  75                         break;
  76                 case '?':
  77                 default:
  78                         goto args;
  79                 }
  80
  81 args:   argc -= optind;
  82         argv += optind;
  83
  84         if (tcgetattr(i.fd, &i.t) < 0)
  85                 errx(1, "stdin isn't a terminal");
  86         if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
  87                 err(1, "TIOCGETD");
  88         if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
  89                 warn("TIOCGWINSZ");
  90
  91         checkredirect();                        /* conversion aid */
  92
  93         switch(fmt) {
  94         case NOTSET:
  95                 if (*argv)
  96                         break;
  97                 /* FALLTHROUGH */
  98         case BSD:
  99         case POSIX:
 100                 print(&i.t, &i.win, i.ldisc, fmt);
 101                 break;
 102         case GFLAG:
 103                 gprint(&i.t, &i.win, i.ldisc);
 104                 break;
 105         }
 106
 107         for (i.set = i.wset = 0; *argv; ++argv) {
 108                 if (ksearch(&argv, &i))
 109                         continue;
 110
 111                 if (csearch(&argv, &i))
 112                         continue;
 113
 114                 if (msearch(&argv, &i))
 115                         continue;
 116
 117                 if (isdigit(**argv)) {
 118                         speed_t speed;
 119
 120                         speed = atoi(*argv);
 121                         cfsetospeed(&i.t, speed);
 122                         cfsetispeed(&i.t, speed);
 123                         i.set = 1;
 124                         continue;
 125                 }
 126
 127                 if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
 128                         gread(&i.t, *argv + sizeof("gfmt1") - 1);
 129                         i.set = 1;
 130                         continue;
 131                 }
 132
 133                 warnx("illegal option -- %s", *argv);
 134                 usage();
 135         }
 136
 137         if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
 138                 err(1, "tcsetattr");
 139         if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
 140                 warn("TIOCSWINSZ");
 141         exit(0);
 142 }
 143
 144 void
 145 usage(void)
 146 {
 147
 148         fprintf(stderr, "usage: stty [-a|-e|-g] [-f file] [options]\n");
 149         exit (1);
 150 }