| File: | src/bin/stty/stty.c |
| Warning: | line 82, column 7 Value stored to 'argc' is never read |
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| 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(*__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_FILENO0; |
| 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_RDONLY0x0000 | O_NONBLOCK0x0004)) == -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; |
Value stored to 'argc' is never read | |
| 83 | argv += optind; |
| 84 | |
| 85 | if (unveil("/", "") == -1) |
| 86 | err(1, "unveil /"); |
| 87 | if (unveil(NULL((void *)0), NULL((void *)0)) == -1) |
| 88 | err(1, "unveil"); |
| 89 | |
| 90 | if (ioctl(i.fd, TIOCGETD((unsigned long)0x40000000 | ((sizeof(int) & 0x1fff) << 16) | ((('t')) << 8) | ((26))), &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((unsigned long)0x40000000 | ((sizeof(struct winsize) & 0x1fff ) << 16) | ((('t')) << 8) | ((104))), &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((void *)0)) == -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((void *)0)) == -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_MAX0x7fffffff, &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((unsigned long)0x80000000 | ((sizeof(struct winsize) & 0x1fff ) << 16) | ((('t')) << 8) | ((103))), &i.win) == -1) |
| 160 | warn("TIOCSWINSZ"); |
| 161 | return (0); |
| 162 | } |
| 163 | |
| 164 | void |
| 165 | usage(void) |
| 166 | { |
| 167 | fprintf(stderr(&__sF[2]), "usage: %s [-a | -e | -g] [-f file] [operands]\n", |
| 168 | __progname); |
| 169 | exit (1); |
| 170 | } |