1 /* $NetBSD: cu.c,v 1.25 2024/11/03 10:43:27 rillig Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #include <getopt.h> 34 #include <inttypes.h> 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)cu.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 __RCSID("$NetBSD: cu.c,v 1.25 2024/11/03 10:43:27 rillig Exp $"); 41 #endif /* not lint */ 42 43 #include "tip.h" 44 45 __dead static void cuhelp(void); 46 __dead static void cuusage(void); 47 48 /* 49 * Botch the interface to look like cu's 50 */ 51 void 52 cumain(int argc, char *argv[]) 53 { 54 int c, i, phonearg = 0, e; 55 int parity = 0; /* 0 is no parity */ 56 int flow = -1; /* -1 is "tandem" ^S/^Q */ 57 static int helpme = 0, nostop = 0; 58 int useresc = '~'; 59 static char sbuf[12]; 60 int cmdlineBR; 61 62 static struct option longopts[] = { 63 { "help", no_argument, &helpme, 1 }, 64 { "escape", required_argument, NULL, 'E' }, 65 { "flow", required_argument, NULL, 'F' }, 66 { "parity", required_argument, NULL, 'P' }, 67 { "phone", required_argument, NULL, 'c' }, 68 { "port", required_argument, NULL, 'a' }, 69 { "line", required_argument, NULL, 'l' }, 70 { "speed", required_argument, NULL, 's' }, 71 { "halfduplex", no_argument, NULL, 'h' }, 72 { "nostop", no_argument, &nostop, 1 }, 73 { NULL, 0, NULL, 0 } 74 }; 75 76 77 if (argc < 2) 78 cuusage(); 79 80 CU = NULL; 81 DV = NULL; 82 BR = DEFBR; 83 cmdlineBR = 0; 84 85 while((c = getopt_long(argc, argv, 86 "E:F:P:a:p:c:l:ns:hefot0123456789", longopts, NULL)) != -1) { 87 88 if (helpme == 1) cuhelp(); 89 90 switch(c) { 91 92 case 'E': 93 if(strlen(optarg) > 1) 94 errx(3, "only one escape character allowed"); 95 useresc = optarg[0]; 96 break; 97 case 'F': 98 if (strncmp(optarg, "hard", sizeof("hard") - 1 ) == 0) 99 flow = 1; 100 else 101 if (strncmp(optarg, "soft", 102 sizeof("soft") - 1 ) == 0) 103 flow = -1; 104 else 105 if(strcmp(optarg, "none") != 0) 106 errx(3, "bad flow setting"); 107 else 108 flow = 0; 109 break; 110 case 'P': 111 if(strcmp(optarg, "even") == 0) 112 parity = -1; 113 else 114 if(strcmp(optarg, "odd") == 0) 115 parity = 1; 116 else 117 if(strcmp(optarg, "none") != 0) 118 errx(3, "bad parity setting"); 119 else 120 parity = 0; 121 break; 122 case 'a': 123 case 'p': 124 CU = optarg; 125 break; 126 case 'c': 127 phonearg = 1; 128 PN = optarg; 129 break; 130 case 'l': 131 if (DV != NULL) 132 errx(3,"more than one line specified"); 133 if(strchr(optarg, '/')) 134 DV = optarg; 135 else 136 (void)asprintf(&DV, "/dev/%s", optarg); 137 break; 138 case 'n': 139 useresc = -1; 140 break; 141 case 's': 142 BR = (long)strtoi(optarg, NULL, 0, 1, LONG_MAX, &e); 143 if (e) 144 warnc(e, "Conversion of `%s' to a baud rate " 145 "failed, using %ld", optarg, BR); 146 break; 147 case 'h': 148 HD = TRUE; 149 break; 150 case 'e': 151 if (parity != 0) 152 errx(3, "more than one parity specified"); 153 parity = -1; /* even */ 154 break; 155 /* Compatibility with Taylor cu */ 156 case 'f': 157 flow = 0; 158 break; 159 case 'o': 160 if (parity != 0) 161 errx(3, "more than one parity specified"); 162 parity = 1; /* odd */ 163 break; 164 case 't': 165 HW = 1, DU = -1, DC = 1; 166 break; 167 case '0': case '1': case '2': case '3': case '4': 168 case '5': case '6': case '7': case '8': case '9': 169 cmdlineBR = cmdlineBR * 10 + (c - '0'); 170 BR = cmdlineBR; 171 break; 172 default: 173 if (nostop == 0) 174 cuusage(); 175 break; 176 } 177 } 178 179 argc -= optind; 180 argv += optind; 181 182 switch (argc) { 183 case 1: 184 if (phonearg) 185 errx(3, "more than one phone number specified"); 186 else 187 /* Compatibility with Taylor cu */ 188 if(!strcmp(argv[0], "dir")) { 189 HW = 1; DU = -1; DC = 1; 190 } else 191 PN = argv[0]; 192 break; 193 case 0: 194 /* 195 * No system or number to call. We're "direct", so use 196 * the tty as local. 197 */ 198 HW = 1; DU = -1; DC = 1; 199 break; 200 default: 201 cuusage(); 202 break; 203 } 204 205 (void)signal(SIGINT, cleanup); 206 (void)signal(SIGQUIT, cleanup); 207 (void)signal(SIGHUP, cleanup); 208 (void)signal(SIGTERM, cleanup); 209 /* (void)signal(SIGCHLD, SIG_DFL) */ /* XXX seems wrong */ 210 211 /* 212 * The "cu" host name is used to define the 213 * attributes of the generic dialer. 214 */ 215 (void)snprintf(sbuf, sizeof sbuf, "cu%d", (int)BR); 216 if ((i = hunt(sbuf)) == 0) { 217 errx(3,"all ports busy"); 218 } 219 if (i == -1) { 220 errx(3, "link down"); 221 } 222 setbuf(stdout, NULL); 223 vinit(); 224 switch (parity) { 225 case -1: 226 setparity("even"); 227 break; 228 case 1: 229 setparity("odd"); 230 break; 231 case 0: 232 setparity("none"); 233 break; 234 default: 235 setparity("none"); 236 break; 237 } 238 239 switch (flow) { 240 case -1: 241 if(nostop) { 242 setboolean(value(TAND), FALSE); 243 setboolean(value(HARDWAREFLOW), FALSE); 244 } 245 else { 246 setboolean(value(TAND), TRUE); 247 setboolean(value(HARDWAREFLOW), FALSE); 248 } 249 break; 250 case 1: 251 setboolean(value(TAND), FALSE); 252 setboolean(value(HARDWAREFLOW), TRUE); 253 break; 254 case 0: 255 default: 256 setboolean(value(TAND), FALSE); 257 setboolean(value(HARDWAREFLOW), FALSE); 258 break; 259 } 260 setcharacter(value(ESCAPE), useresc); 261 setboolean(value(VERBOSE), FALSE); 262 if (HD) 263 setboolean(value(LECHO), TRUE); 264 if (HW) { 265 if (ttysetup((speed_t)BR) != 0) { 266 errx(3, "unsupported speed %ld", BR); 267 } 268 } 269 if (tip_connect()) { 270 errx(1, "Connect failed"); 271 } 272 if (!HW) { 273 if (ttysetup((speed_t)BR) != 0) { 274 errx(3, "unsupported speed %ld", BR); 275 } 276 } 277 } 278 279 static void 280 cuusage(void) 281 { 282 (void)fprintf(stderr, "Usage: cu [options] [phone-number|\"dir\"]\n" 283 "Use cu --help for help\n"); 284 exit(8); 285 } 286 287 static void 288 cuhelp(void) 289 { 290 (void)fprintf(stderr, 291 "BSD tip/cu\n" 292 "Usage: cu [options] [phone-number|\"dir\"]\n" 293 " -E,--escape char: Use this escape character\n" 294 " -F,--flow {hard,soft,none}: Use RTS/CTS, ^S/^Q, no flow control\n" 295 " -f: Use no flow control\n" 296 " --nostop: Do not use software flow control\n" 297 " -a, -p,--port port: Use this port as ACU/Dialer\n" 298 " -c,--phone number: Call this number\n" 299 " -h,--halfduplex: Echo characters locally (use \"half duplex\")\n" 300 " -e: Use even parity\n" 301 " -o: Use odd parity\n" 302 " -P,--parity {even,odd,none}: use even, odd, no parity\n" 303 " -l,--line line: Use this device (ttyXX)\n" 304 " -n: Disable escape character processing\n" 305 " -s,--speed,--baud speed,-#: Use this speed\n" 306 " -t: Connect via hard-wired connection\n"); 307 exit(0); 308 } 309
Indexes created Wed Sep 24 15:09:51 GMT 2025