bin/stty/stty.c

   1 /*      $OpenBSD: stty.c,v 1.14 2009/10/28 20:58:38 deraadt Exp $       */
   2 /*      $NetBSD: stty.c,v 1.11 1995/03/21 09:11:30 cgd Exp $    */
   3
   4 /*-
   5  * Copyright (c) 1989, 1991, 1993, 1994
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/types.h>
  34
  35 #include <ctype.h>
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <fcntl.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <limits.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                 default:
  77                         goto args;
  78                 }
  79
  80 args:   argc -= optind;
  81         argv += optind;
  82
  83         if (tcgetattr(i.fd, &i.t) < 0)
  84                 errx(1, "not a terminal");
  85         if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0 )
  86                 err(1, "TIOCGETD");
  87         if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
  88                 warn("TIOCGWINSZ");
  89
  90         switch(fmt) {
  91         case NOTSET:
  92                 if (*argv)
  93                         break;
  94                 /* FALLTHROUGH */
  95         case BSD:
  96         case POSIX:
  97                 print(&i.t, &i.win, i.ldisc, fmt);
  98                 break;
  99         case GFLAG:
 100                 gprint(&i.t, &i.win, i.ldisc);
 101                 break;
 102         }
 103
 104         for (i.set = i.wset = 0; *argv; ++argv) {
 105                 if (ksearch(&argv, &i))
 106                         continue;
 107
 108                 if (csearch(&argv, &i))
 109                         continue;
 110
 111                 if (msearch(&argv, &i))
 112                         continue;
 113
 114                 if (isdigit(**argv)) {
 115                         const char *error;
 116                         int speed;
 117
 118                         speed = strtonum(*argv, 0, INT_MAX, &error);
 119                         if (error)
 120                                 err(1, "%s", *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         return (0);
 142 }
 143
 144 void
 145 usage(void)
 146 {
 147         fprintf(stderr, "usage: %s [-a | -e | -g] [-f file] [operands]\n",
 148             __progname);
 149         exit (1);
 150 }