1 /* $OpenBSD: ttyflags.c,v 1.10 2002/07/03 22:32:34 deraadt 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 #ifndef lint 36 char copyright[] = 37 "@(#) Copyright (c) 1994 Christopher G. Demetriou\n\ 38 All rights reserved.\n"; 39 #endif /* not lint */ 40 41 #ifndef lint 42 static char rcsid[] = "$OpenBSD: ttyflags.c,v 1.10 2002/07/03 22:32:34 deraadt Exp $"; 43 #endif /* not lint */ 44 45 #include <sys/types.h> 46 #include <sys/cdefs.h> 47 #include <sys/ioctl.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <limits.h> 53 #include <paths.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <ttyent.h> 58 #include <unistd.h> 59 60 int all(int); 61 int ttys(char **, int); 62 int ttyflags(struct ttyent *, int); 63 void usage(void); 64 65 int nflag, vflag; 66 67 /* 68 * Ttyflags sets the device-specific tty flags, based on the contents 69 * of /etc/ttys. It can either set all of the ttys' flags, or set 70 * the flags of the ttys specified on the command line. 71 */ 72 int 73 main(int argc, char *argv[]) 74 { 75 int aflag, ch, rval, pflag = 0; 76 77 aflag = nflag = vflag = 0; 78 while ((ch = getopt(argc, argv, "panv")) != -1) 79 switch (ch) { 80 case 'a': 81 aflag = 1; 82 break; 83 case 'n': /* undocumented */ 84 nflag = 1; 85 break; 86 case 'p': 87 pflag = 1; 88 break; 89 case 'v': 90 vflag = 1; 91 break; 92 case '?': 93 default: 94 usage(); 95 } 96 argc -= optind; 97 argv += optind; 98 99 if (aflag && argc != 0) 100 usage(); 101 102 if (setttyent() == 0) 103 err(1, "setttyent"); 104 105 if (aflag) 106 rval = all(pflag); 107 else 108 rval = ttys(argv, pflag); 109 110 if (endttyent() == 0) 111 warn("endttyent"); 112 113 exit(rval); 114 } 115 116 /* 117 * Change all /etc/ttys entries' flags. 118 */ 119 int 120 all(int print) 121 { 122 struct ttyent *tep; 123 int rval; 124 125 rval = 0; 126 for (tep = getttyent(); tep != NULL; tep = getttyent()) 127 if (ttyflags(tep, print)) 128 rval = 1; 129 return (rval); 130 } 131 132 /* 133 * Change the specified ttys' flags. 134 */ 135 int 136 ttys(char **ttylist, int print) 137 { 138 struct ttyent *tep; 139 int rval; 140 141 rval = 0; 142 for (; *ttylist != NULL; ttylist++) { 143 tep = getttynam(*ttylist); 144 if (tep == NULL) { 145 warnx("couldn't find an entry in %s for \"%s\"", 146 _PATH_TTYS, *ttylist); 147 rval = 1; 148 continue; 149 } 150 151 if (ttyflags(tep, print)) 152 rval = 1; 153 } 154 return (rval); 155 } 156 157 158 /* 159 * Actually do the work; find out what the new flags value should be, 160 * open the device, and change the flags. 161 */ 162 int 163 ttyflags(struct ttyent *tep, int print) 164 { 165 int fd, flags = 0, rval = 0, st, sep = 0; 166 char path[PATH_MAX]; 167 char strflags[256]; 168 169 st = tep->ty_status; 170 strflags[0] = '\0'; 171 172 /* Find the full device path name. */ 173 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); 174 175 if (print == 0) { 176 /* Convert ttyent.h flags into ioctl flags. */ 177 if (st & TTY_LOCAL) { 178 flags |= TIOCFLAG_CLOCAL; 179 (void)strlcat(strflags, "local", sizeof strflags); 180 sep++; 181 } 182 if (st & TTY_RTSCTS) { 183 flags |= TIOCFLAG_CRTSCTS; 184 if (sep++) 185 (void)strlcat(strflags, "|", sizeof strflags); 186 (void)strlcat(strflags, "rtscts", sizeof strflags); 187 } 188 if (st & TTY_SOFTCAR) { 189 flags |= TIOCFLAG_SOFTCAR; 190 if (sep++) 191 (void)strlcat(strflags, "|", sizeof strflags); 192 (void)strlcat(strflags, "softcar", sizeof strflags); 193 } 194 if (st & TTY_MDMBUF) { 195 flags |= TIOCFLAG_MDMBUF; 196 if (sep++) 197 (void)strlcat(strflags, "|", sizeof strflags); 198 (void)strlcat(strflags, "mdmbuf", sizeof strflags); 199 } 200 if (vflag) 201 printf("%s setting flags to: %s\n", path, strflags); 202 } 203 204 if (nflag) 205 return (0); 206 207 /* Open the device NON-BLOCKING, set the flags, and close it. */ 208 if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) { 209 if (!(errno == ENXIO || 210 (errno == ENOENT && (st & TTY_ON) == 0))) 211 rval = 1; 212 if (vflag) 213 warn("open %s", path); 214 return (rval); 215 } 216 if (print == 0) { 217 if (ioctl(fd, TIOCSFLAGS, &flags) == -1) 218 if (errno != ENOTTY || vflag) { 219 warn("TIOCSFLAGS on %s", path); 220 rval = (errno != ENOTTY); 221 } 222 } else { 223 if (ioctl(fd, TIOCGFLAGS, &flags) == -1) 224 if (errno != ENOTTY || vflag) { 225 warn("TIOCGFLAGS on %s", path); 226 rval = (errno != ENOTTY); 227 } 228 if (flags & TIOCFLAG_CLOCAL) { 229 (void)strlcat(strflags, "local", sizeof strflags); 230 sep++; 231 } 232 if (flags & TIOCFLAG_CRTSCTS) { 233 if (sep++) 234 (void)strlcat(strflags, "|", sizeof strflags); 235 (void)strlcat(strflags, "rtscts", sizeof strflags); 236 } 237 if (flags & TIOCFLAG_SOFTCAR) { 238 if (sep++) 239 (void)strlcat(strflags, "|", sizeof strflags); 240 (void)strlcat(strflags, "softcar", sizeof strflags); 241 } 242 if (flags & TIOCFLAG_MDMBUF) { 243 if (sep++) 244 (void)strlcat(strflags, "|", sizeof strflags); 245 (void)strlcat(strflags, "mdmbuf", sizeof strflags); 246 } 247 printf("%s flags are: %s\n", path, strflags); 248 } 249 if (close(fd) == -1) { 250 warn("close %s", path); 251 return (1); 252 } 253 return (rval); 254 } 255 256 /* 257 * Print usage information when a bogus set of arguments is given. 258 */ 259 void 260 usage(void) 261 { 262 (void)fprintf(stderr, "usage: ttyflags [-v] [-p] [-a | tty ... ]\n"); 263 exit(1); 264 } 265