1 /* $OpenBSD: stty.c,v 1.22 2021/10/23 16:45:32 mestre 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 #include <sys/ioctl.h> 35 36 #include <ctype.h> 37 #include <err.h> 38 #include <errno.h> 39 #include <fcntl.h> 40 #include <limits.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <termios.h> 45 #include <unistd.h> 46 47 #include "stty.h" 48 #include "extern.h" 49 50 int 51 main(int argc, char *argv[]) 52 { 53 struct info i; 54 enum FMT fmt; 55 int ch; 56 57 fmt = NOTSET; 58 i.fd = STDIN_FILENO; 59 60 opterr = 0; 61 while (optind < argc && 62 strspn(argv[optind], "-aefg") == strlen(argv[optind]) && 63 (ch = getopt(argc, argv, "aef:g")) != -1) 64 switch(ch) { 65 case 'a': 66 fmt = POSIX; 67 break; 68 case 'e': 69 fmt = BSD; 70 break; 71 case 'f': 72 if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) == -1) 73 err(1, "%s", optarg); 74 break; 75 case 'g': 76 fmt = GFLAG; 77 break; 78 default: 79 goto args; 80 } 81 82 args: argc -= optind; 83 argv += optind; 84 85 if (unveil("/", "") == -1) 86 err(1, "unveil /"); 87 if (unveil(NULL, NULL) == -1) 88 err(1, "unveil"); 89 90 if (ioctl(i.fd, TIOCGETD, &i.ldisc) == -1) 91 err(1, "TIOCGETD"); 92 93 if (tcgetattr(i.fd, &i.t) == -1) 94 errx(1, "not a terminal"); 95 if (ioctl(i.fd, TIOCGWINSZ, &i.win) == -1) 96 warn("TIOCGWINSZ"); 97 98 switch(fmt) { 99 case NOTSET: 100 if (*argv) 101 break; 102 /* FALLTHROUGH */ 103 case BSD: 104 case POSIX: 105 if (*argv) 106 errx(1, "either display or modify"); 107 if (pledge("stdio", NULL) == -1) 108 err(1, "pledge"); 109 print(&i.t, &i.win, i.ldisc, fmt); 110 break; 111 case GFLAG: 112 if (*argv) 113 errx(1, "either display or modify"); 114 if (pledge("stdio", NULL) == -1) 115 err(1, "pledge"); 116 gprint(&i.t, &i.win, i.ldisc); 117 break; 118 } 119 120 /* 121 * Cannot pledge, because of "extproc", "ostart" and "ostop" 122 */ 123 124 for (i.set = i.wset = 0; *argv; ++argv) { 125 if (ksearch(&argv, &i)) 126 continue; 127 128 if (csearch(&argv, &i)) 129 continue; 130 131 if (msearch(&argv, &i)) 132 continue; 133 134 if (isdigit((unsigned char)**argv)) { 135 const char *error; 136 int speed; 137 138 speed = strtonum(*argv, 0, INT_MAX, &error); 139 if (error) 140 err(1, "%s", *argv); 141 cfsetospeed(&i.t, speed); 142 cfsetispeed(&i.t, speed); 143 i.set = 1; 144 continue; 145 } 146 147 if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) { 148 gread(&i.t, *argv + sizeof("gfmt1") - 1); 149 i.set = 1; 150 continue; 151 } 152 153 warnx("illegal option -- %s", *argv); 154 usage(); 155 } 156 157 if (i.set && tcsetattr(i.fd, 0, &i.t) == -1) 158 err(1, "tcsetattr"); 159 if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) == -1) 160 warn("TIOCSWINSZ"); 161 return (0); 162 } 163 164 void 165 usage(void) 166 { 167 fprintf(stderr, "usage: %s [-a | -e | -g] [-f file] [operands]\n", 168 __progname); 169 exit (1); 170 } 171