1 /* $NetBSD: ttyflags.c,v 1.12 2000/06/14 17:25:29 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the 18 * NetBSD Project. See http://www.netbsd.org/ for 19 * information about NetBSD. 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 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>> 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __COPYRIGHT("@(#) Copyright (c) 1994 Christopher G. Demetriou\n\ 40 All rights reserved.\n"); 41 #endif /* not lint */ 42 43 #ifndef lint 44 __RCSID("$NetBSD: ttyflags.c,v 1.12 2000/06/14 17:25:29 cgd Exp $"); 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/cdefs.h> 49 #include <sys/ioctl.h> 50 51 #include <err.h> 52 #include <errno.h> 53 #include <fcntl.h> 54 #include <limits.h> 55 #include <paths.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <ttyent.h> 60 #include <unistd.h> 61 62 int change_all __P((void)); 63 int change_ttyflags __P((struct ttyent *)); 64 int change_ttys __P((char **)); 65 int main __P((int, char *[])); 66 void usage __P((void)); 67 68 int nflag, vflag; 69 70 /* 71 * Ttyflags sets the device-specific tty flags, based on the contents 72 * of /etc/ttys. It can either set all of the ttys' flags, or set 73 * the flags of the ttys specified on the command line. 74 */ 75 int 76 main(argc, argv) 77 int argc; 78 char *argv[]; 79 { 80 int aflag, ch, rval; 81 82 aflag = nflag = vflag = 0; 83 while ((ch = getopt(argc, argv, "anv")) != -1) 84 switch (ch) { 85 case 'a': 86 aflag = 1; 87 break; 88 case 'n': /* undocumented */ 89 nflag = 1; 90 break; 91 case 'v': 92 vflag = 1; 93 break; 94 case '?': 95 default: 96 usage(); 97 } 98 argc -= optind; 99 argv += optind; 100 101 if (aflag && argc != 0) 102 usage(); 103 104 rval = 0; 105 106 if (setttyent() == 0) 107 err(1, "setttyent"); 108 109 if (aflag) 110 rval = change_all(); 111 else 112 rval = change_ttys(argv); 113 114 if (endttyent() == 0) 115 warn("endttyent"); 116 117 exit(rval); 118 } 119 120 /* 121 * Change all /etc/ttys entries' flags. 122 */ 123 int 124 change_all() 125 { 126 struct ttyent *tep; 127 int rval; 128 129 rval = 0; 130 for (tep = getttyent(); tep != NULL; tep = getttyent()) 131 if (change_ttyflags(tep)) 132 rval = 1; 133 return (rval); 134 } 135 136 /* 137 * Change the specified ttys' flags. 138 */ 139 int 140 change_ttys(ttylist) 141 char **ttylist; 142 { 143 struct ttyent *tep; 144 int rval; 145 146 rval = 0; 147 for (; *ttylist != NULL; ttylist++) { 148 tep = getttynam(*ttylist); 149 if (tep == NULL) { 150 warnx("couldn't find an entry in %s for \"%s\"", 151 _PATH_TTYS, *ttylist); 152 rval = 1; 153 continue; 154 } 155 156 if (change_ttyflags(tep)) 157 rval = 1; 158 } 159 return (rval); 160 } 161 162 163 /* 164 * Actually do the work; find out what the new flags value should be, 165 * open the device, and change the flags. 166 */ 167 int 168 change_ttyflags(tep) 169 struct ttyent *tep; 170 { 171 int fd, flags, rval, st, sep; 172 char path[PATH_MAX]; 173 char strflags[256]; 174 175 st = tep->ty_status; 176 sep = flags = rval = 0; 177 strflags[0] = '\0'; 178 179 180 /* Convert ttyent.h flags into ioctl flags. */ 181 if (st & TTY_LOCAL) { 182 flags |= TIOCFLAG_CLOCAL; 183 (void)strcat(strflags, "local"); 184 sep++; 185 } 186 if (st & TTY_RTSCTS) { 187 flags |= TIOCFLAG_CRTSCTS; 188 if (sep++) 189 (void)strcat(strflags, "|"); 190 (void)strcat(strflags, "rtscts"); 191 } 192 if (st & TTY_DTRCTS) { 193 flags |= TIOCFLAG_CDTRCTS; 194 if (sep++) 195 (void)strcat(strflags, "|"); 196 (void)strcat(strflags, "dtrcts"); 197 } 198 if (st & TTY_SOFTCAR) { 199 flags |= TIOCFLAG_SOFTCAR; 200 if (sep++) 201 (void)strcat(strflags, "|"); 202 (void)strcat(strflags, "softcar"); 203 } 204 if (st & TTY_MDMBUF) { 205 flags |= TIOCFLAG_MDMBUF; 206 if (sep++) 207 (void)strcat(strflags, "|"); 208 (void)strcat(strflags, "mdmbuf"); 209 } 210 211 if (strflags[0] == '\0') 212 (void)strcpy(strflags, "none"); 213 214 /* Find the full device path name. */ 215 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); 216 217 if (vflag) 218 warnx("setting flags on %s to %s", path, strflags); 219 if (nflag) 220 return (0); 221 222 /* Open the device NON-BLOCKING, set the flags, and close it. */ 223 if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) { 224 if (!(errno == ENXIO || 225 (errno == ENOENT && (st & TTY_ON) == 0))) 226 rval = 1; 227 if (rval || vflag) 228 warn("open %s", path); 229 return (rval); 230 } 231 if (ioctl(fd, TIOCSFLAGS, &flags) == -1) 232 if (errno != ENOTTY || vflag) { 233 warn("TIOCSFLAGS on %s", path); 234 rval = (errno != ENOTTY); 235 } 236 if (close(fd) == -1) { 237 warn("close %s", path); 238 return (1); 239 } 240 return (rval); 241 } 242 243 /* 244 * Print usage information when a bogus set of arguments is given. 245 */ 246 void 247 usage() 248 { 249 (void)fprintf(stderr, "usage: ttyflags [-v] [-a | tty ... ]\n"); 250 exit(1); 251 } 252