1 /* $NetBSD: ttyflags.c,v 1.17 2008/07/20 01:20:23 lukem 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\ 40 Christopher G. Demetriou. All rights reserved."); 41 #endif /* not lint */ 42 43 #ifndef lint 44 __RCSID("$NetBSD: ttyflags.c,v 1.17 2008/07/20 01:20:23 lukem Exp $"); 45 #endif /* not lint */ 46 47 #include <sys/types.h> 48 #include <sys/ioctl.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <fcntl.h> 53 #include <limits.h> 54 #include <paths.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <ttyent.h> 59 #include <unistd.h> 60 61 int change_all(void); 62 int change_ttyflags(struct ttyent *); 63 int change_ttys(char **); 64 void usage(void); 65 66 int nflag, vflag; 67 68 /* 69 * Ttyflags sets the device-specific tty flags, based on the contents 70 * of /etc/ttys. It can either set all of the ttys' flags, or set 71 * the flags of the ttys specified on the command line. 72 */ 73 int 74 main(int argc, char *argv[]) 75 { 76 int aflag, ch, rval; 77 78 aflag = nflag = vflag = 0; 79 while ((ch = getopt(argc, argv, "anv")) != -1) 80 switch (ch) { 81 case 'a': 82 aflag = 1; 83 break; 84 case 'n': /* undocumented */ 85 nflag = 1; 86 break; 87 case 'v': 88 vflag = 1; 89 break; 90 case '?': 91 default: 92 usage(); 93 } 94 argc -= optind; 95 argv += optind; 96 97 if (aflag && argc != 0) 98 usage(); 99 100 rval = 0; 101 102 if (setttyent() == 0) 103 err(1, "setttyent"); 104 105 if (aflag) 106 rval = change_all(); 107 else 108 rval = change_ttys(argv); 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 change_all(void) 121 { 122 struct ttyent *tep; 123 int rval; 124 125 rval = 0; 126 for (tep = getttyent(); tep != NULL; tep = getttyent()) 127 if (change_ttyflags(tep)) 128 rval = 1; 129 return (rval); 130 } 131 132 /* 133 * Change the specified ttys' flags. 134 */ 135 int 136 change_ttys(char **ttylist) 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 (change_ttyflags(tep)) 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 change_ttyflags(struct ttyent *tep) 164 { 165 int fd, flags, rval, st, sep; 166 char path[PATH_MAX]; 167 char strflags[256]; 168 169 st = tep->ty_status; 170 sep = flags = rval = 0; 171 strflags[0] = '\0'; 172 173 174 /* Convert ttyent.h flags into ioctl flags. */ 175 if (st & TTY_LOCAL) { 176 flags |= TIOCFLAG_CLOCAL; 177 (void)strlcat(strflags, "local", sizeof(strflags)); 178 sep++; 179 } 180 if (st & TTY_RTSCTS) { 181 flags |= TIOCFLAG_CRTSCTS; 182 if (sep++) 183 (void)strlcat(strflags, "|", sizeof(strflags)); 184 (void)strlcat(strflags, "rtscts", sizeof(strflags)); 185 } 186 if (st & TTY_DTRCTS) { 187 flags |= TIOCFLAG_CDTRCTS; 188 if (sep++) 189 (void)strlcat(strflags, "|", sizeof(strflags)); 190 (void)strlcat(strflags, "dtrcts", sizeof(strflags)); 191 } 192 if (st & TTY_SOFTCAR) { 193 flags |= TIOCFLAG_SOFTCAR; 194 if (sep++) 195 (void)strlcat(strflags, "|", sizeof(strflags)); 196 (void)strlcat(strflags, "softcar", sizeof(strflags)); 197 } 198 if (st & TTY_MDMBUF) { 199 flags |= TIOCFLAG_MDMBUF; 200 if (sep++) 201 (void)strlcat(strflags, "|", sizeof(strflags)); 202 (void)strlcat(strflags, "mdmbuf", sizeof(strflags)); 203 } 204 205 if (strflags[0] == '\0') 206 (void)strlcpy(strflags, "none", sizeof(strflags)); 207 208 /* Find the full device path name. */ 209 (void)snprintf(path, sizeof path, "%s%s", _PATH_DEV, tep->ty_name); 210 211 if (vflag) 212 warnx("setting flags on %s to %s", path, strflags); 213 if (nflag) 214 return (0); 215 216 /* Open the device NON-BLOCKING, set the flags, and close it. */ 217 if ((fd = open(path, O_RDONLY | O_NONBLOCK, 0)) == -1) { 218 if (!(errno == ENXIO || 219 (errno == ENOENT && (st & TTY_ON) == 0))) 220 rval = 1; 221 if (rval || vflag) 222 warn("open %s", path); 223 return (rval); 224 } 225 if (ioctl(fd, TIOCSFLAGS, &flags) == -1) 226 if (errno != ENOTTY || vflag) { 227 warn("TIOCSFLAGS on %s", path); 228 rval = (errno != ENOTTY); 229 } 230 if (close(fd) == -1) { 231 warn("close %s", path); 232 return (1); 233 } 234 return (rval); 235 } 236 237 /* 238 * Print usage information when a bogus set of arguments is given. 239 */ 240 void 241 usage(void) 242 { 243 (void)fprintf(stderr, "usage: ttyflags [-v] [-a | tty ... ]\n"); 244 exit(1); 245 } 246