1/* $OpenBSD: ttyflags.c,v 1.17 2022/12/04 23:50:47 cheloha Exp $ */ 2/* $NetBSD: ttyflags.c,v 1.8 1996/04/09 05:20:30 cgd Exp $ */ 3 4/* 5 * Copyright (c) 1996 Theo de Raadt 6 * Copyright (c) 1994 Christopher G. Demetriou 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Christopher G. Demetriou. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35#include <sys/types.h> 36#include <sys/ioctl.h> 37 38#include <err.h> 39#include <errno.h> 40#include <fcntl.h> 41#include <limits.h> 42#include <paths.h> 43#include <stdio.h> 44#include <stdlib.h> 45#include <string.h> 46#include <ttyent.h> 47#include <unistd.h> 48 49int all(int); 50int ttys(char **, int); 51int ttyflags(struct ttyent *, int); 52void usage(void); 53 54int nflag, vflag; 55 56/* 57 * Ttyflags sets the device-specific tty flags, based on the contents 58 * of /etc/ttys. It can either set all of the ttys' flags, or set 59 * the flags of the ttys specified on the command line. 60 */ 61int 62main(int argc, char *argv[]) 63{ 64 int aflag, ch, rval, pflag = 0; 65 66 aflag = nflag = vflag = 0; 67 while ((ch = getopt(argc, argv, "panv")) != -1) 68 switch (ch) { 69 case 'a': 70 aflag = 1; 71 break; 72 case 'n': /* undocumented */ 73 nflag = 1; 74 break; 75 case 'p': 76 pflag = 1; 77 break; 78 case 'v': 79 vflag = 1; 80 break; 81 default: 82 usage(); 83 } 84 argc -= optind; 85 argv += optind; 86 87 if (aflag && argc != 0) 88 usage(); 89 90 if (setttyent() == 0) 91 err(1, "setttyent"); 92 93 if (aflag) 94 rval = all(pflag); 95 else 96 rval = ttys(argv, pflag); 97 98 if (endttyent() == 0) 99 warn("endttyent"); 100 101 exit(rval); 102} 103 104/* 105 * Change all /etc/ttys entries' flags. 106 */ 107int 108all(int print) 109{ 110 struct ttyent *tep; 111 int rval; 112 113 rval = 0; 114 for (tep = getttyent(); tep != NULL; tep = getttyent()) { 115 /* pseudo-tty ignore TIOCSFLAGS, so don't bother */ 116 if (tep->ty_type == NULL || 117 strcmp(tep->ty_type, "network") == 0) 118 continue; 119 if (ttyflags(tep, print)) 120 rval = 1; 121 } 122 return (rval); 123} 124 125/* 126 * Change the specified ttys' flags. 127 */ 128int 129ttys(char **ttylist, int print) 130{ 131 struct ttyent *tep; 132 int rval; 133 134 rval = 0; 135 for (; *ttylist != NULL; ttylist++) { 136 tep = getttynam(*ttylist); 137 if (tep == NULL) { 138 warnx("couldn't find an entry in %s for \"%s\"", 139 _PATH_TTYS, *ttylist); 140 rval = 1; 141 continue; 142 } 143 144 if (ttyflags(tep, print)) 145 rval = 1; 146 } 147 return (rval); 148} 149 150 151/* 152 * Actually do the work; find out what the new flags value should be, 153 * open the device, and change the flags. 154 */ 155int 156ttyflags(struct ttyent *tep, int print) 157{ 158 int fd, flags = 0, rval = 0, st, sep = 0; 159 char path[PATH_MAX]; 160 char strflags[256]; 161 162 st = tep->ty_status; 163 strflags[0] = '\0'; 164 165 /* Find the full device path name. */ 166 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); 167 168 if (print == 0) { 169 /* Convert ttyent.h flags into ioctl flags. */ 170 if (st & TTY_LOCAL) { 171 flags |= TIOCFLAG_CLOCAL; 172 (void)strlcat(strflags, "local", sizeof strflags); 173 sep++; 174 } 175 if (st & TTY_RTSCTS) { 176 flags |= TIOCFLAG_CRTSCTS; 177 if (sep++) 178 (void)strlcat(strflags, "|", sizeof strflags); 179 (void)strlcat(strflags, "rtscts", sizeof strflags); 180 } 181 if (st & TTY_SOFTCAR) { 182 flags |= TIOCFLAG_SOFTCAR; 183 if (sep++) 184 (void)strlcat(strflags, "|", sizeof strflags); 185 (void)strlcat(strflags, "softcar", sizeof strflags); 186 } 187 if (st & TTY_MDMBUF) { 188 flags |= TIOCFLAG_MDMBUF; 189 if (sep++) 190 (void)strlcat(strflags, "|", sizeof strflags); 191 (void)strlcat(strflags, "mdmbuf", sizeof strflags); 192 } 193 if (vflag) 194 printf("%s setting flags to: %s\n", path, strflags); 195 } 196 197 if (nflag) 198 return (0); 199 200 /* Open the device NON-BLOCKING, set the flags, and close it. */ 201 if ((fd = open(path, O_RDONLY | O_NONBLOCK)) == -1) { 202 if (!(errno == ENXIO || 203 (errno == ENOENT && (st & TTY_ON) == 0))) 204 rval = 1; 205 if (vflag) 206 warn("open %s", path); 207 return (rval); 208 } 209 if (print == 0) { 210 if (ioctl(fd, TIOCSFLAGS, &flags) == -1) 211 if (errno != ENOTTY || vflag) { 212 warn("TIOCSFLAGS on %s", path); 213 rval = (errno != ENOTTY); 214 } 215 } else { 216 if (ioctl(fd, TIOCGFLAGS, &flags) == -1) 217 if (errno != ENOTTY || vflag) { 218 warn("TIOCGFLAGS on %s", path); 219 rval = (errno != ENOTTY); 220 } 221 if (flags & TIOCFLAG_CLOCAL) { 222 (void)strlcat(strflags, "local", sizeof strflags); 223 sep++; 224 } 225 if (flags & TIOCFLAG_CRTSCTS) { 226 if (sep++) 227 (void)strlcat(strflags, "|", sizeof strflags); 228 (void)strlcat(strflags, "rtscts", sizeof strflags); 229 } 230 if (flags & TIOCFLAG_SOFTCAR) { 231 if (sep++) 232 (void)strlcat(strflags, "|", sizeof strflags); 233 (void)strlcat(strflags, "softcar", sizeof strflags); 234 } 235 if (flags & TIOCFLAG_MDMBUF) { 236 if (sep++) 237 (void)strlcat(strflags, "|", sizeof strflags); 238 (void)strlcat(strflags, "mdmbuf", sizeof strflags); 239 } 240 printf("%s flags are: %s\n", path, strflags); 241 } 242 if (close(fd) == -1) { 243 warn("close %s", path); 244 return (1); 245 } 246 return (rval); 247} 248 249/* 250 * Print usage information when a bogus set of arguments is given. 251 */ 252void 253usage(void) 254{ 255 (void)fprintf(stderr, "usage: ttyflags [-pv] [-a | tty ...]\n"); 256 exit(1); 257} 258