1 /* $OpenBSD: remote.c,v 1.16 2006/06/06 23:24:52 deraadt Exp $ */ 2 /* $NetBSD: remote.c,v 1.5 1997/04/20 00:02:45 mellon Exp $ */ 3 4 /* 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1992, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)remote.c 8.1 (Berkeley) 6/6/93"; 46 static const char rcsid[] = "$OpenBSD: remote.c,v 1.16 2006/06/06 23:24:52 deraadt Exp $"; 47 #endif 48 #endif /* not lint */ 49 50 #include <stdio.h> 51 #include <stdlib.h> 52 53 #include "pathnames.h" 54 #include "tip.h" 55 56 /* 57 * Attributes to be gleened from remote host description 58 * data base. 59 */ 60 static char **caps[] = { 61 &AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN, &PR, &DI, 62 &ES, &EX, &FO, &RC, &RE, &PA 63 }; 64 65 static char *capstrings[] = { 66 "at", "dv", "cm", "cu", "el", "ie", "oe", "pn", "pr", 67 "di", "es", "ex", "fo", "rc", "re", "pa", 0 68 }; 69 70 static char *db_array[3] = { _PATH_REMOTE, 0, 0 }; 71 72 #define cgetflag(f) (cgetcap(bp, f, ':') != NULL) 73 74 static void getremcap(char *); 75 76 static void 77 getremcap(char *host) 78 { 79 char **p, ***q, *bp, *rempath; 80 int stat; 81 82 rempath = getenv("REMOTE"); 83 if (rempath != NULL) { 84 if (*rempath != '/') 85 /* we have an entry */ 86 cgetset(rempath); 87 else { /* we have a path */ 88 db_array[1] = rempath; 89 db_array[2] = _PATH_REMOTE; 90 } 91 } 92 93 if ((stat = cgetent(&bp, db_array, host)) < 0) { 94 if ((DV != NULL) || 95 (host[0] == '/' && access(DV = host, R_OK | W_OK) == 0)) { 96 CU = DV; 97 HO = host; 98 HW = 1; 99 DU = 0; 100 if (!BR) 101 BR = DEFBR; 102 FS = DEFFS; 103 return; 104 } 105 switch (stat) { 106 case -1: 107 fprintf(stderr, "%s: unknown host %s\n", __progname, 108 host); 109 break; 110 case -2: 111 fprintf(stderr, 112 "%s: can't open host description file\n", 113 __progname); 114 break; 115 case -3: 116 fprintf(stderr, 117 "%s: possible reference loop in host description file\n", __progname); 118 break; 119 } 120 exit(3); 121 } 122 123 for (p = capstrings, q = caps; *p != NULL; p++, q++) 124 if (**q == NULL) 125 cgetstr(bp, *p, *q); 126 if (!BR && (cgetnum(bp, "br", &BR) == -1)) 127 BR = DEFBR; 128 if (!LD && (cgetnum(bp, "ld", &LD) == -1)) 129 LD = TTYDISC; 130 if (cgetnum(bp, "fs", &FS) == -1) 131 FS = DEFFS; 132 if (DU < 0) 133 DU = 0; 134 else 135 DU = cgetflag("du"); 136 if (DV == NOSTR) { 137 fprintf(stderr, "%s: missing device spec\n", host); 138 exit(3); 139 } 140 if (DU && CU == NOSTR) 141 CU = DV; 142 if (DU && PN == NOSTR) { 143 fprintf(stderr, "%s: missing phone number\n", host); 144 exit(3); 145 } 146 if (DU && AT == NOSTR) { 147 fprintf(stderr, "%s: missing acu type\n", host); 148 exit(3); 149 } 150 151 HD = cgetflag("hd"); 152 153 /* 154 * This effectively eliminates the "hw" attribute 155 * from the description file 156 */ 157 if (!HW) 158 HW = (CU == NOSTR) || (DU && equal(DV, CU)); 159 HO = host; 160 /* 161 * see if uppercase mode should be turned on initially 162 */ 163 if (cgetflag("ra")) 164 setboolean(value(RAISE), 1); 165 if (cgetflag("ec")) 166 setboolean(value(ECHOCHECK), 1); 167 if (cgetflag("be")) 168 setboolean(value(BEAUTIFY), 1); 169 if (cgetflag("nb")) 170 setboolean(value(BEAUTIFY), 0); 171 if (cgetflag("sc")) 172 setboolean(value(SCRIPT), 1); 173 if (cgetflag("tb")) 174 setboolean(value(TABEXPAND), 1); 175 if (cgetflag("vb")) 176 setboolean(value(VERBOSE), 1); 177 if (cgetflag("nv")) 178 setboolean(value(VERBOSE), 0); 179 if (cgetflag("ta")) 180 setboolean(value(TAND), 1); 181 if (cgetflag("nt")) 182 setboolean(value(TAND), 0); 183 if (cgetflag("rw")) 184 setboolean(value(RAWFTP), 1); 185 if (cgetflag("hd")) 186 setboolean(value(HALFDUPLEX), 1); 187 if (cgetflag("dc")) 188 setboolean(value(DC), 1); 189 if (cgetflag("hf")) 190 setboolean(value(HARDWAREFLOW), 1); 191 if (RE == NOSTR) 192 RE = (char *)"tip.record"; 193 if (EX == NOSTR) 194 EX = (char *)"\t\n\b\f"; 195 if (ES != NOSTR) 196 vstring("es", ES); 197 if (FO != NOSTR) 198 vstring("fo", FO); 199 if (PR != NOSTR) 200 vstring("pr", PR); 201 if (RC != NOSTR) 202 vstring("rc", RC); 203 if (cgetnum(bp, "dl", &DL) == -1) 204 DL = 0; 205 if (cgetnum(bp, "cl", &CL) == -1) 206 CL = 0; 207 if (cgetnum(bp, "et", &ET) == -1) 208 ET = 10; 209 } 210 211 char * 212 getremote(char *host) 213 { 214 char *cp; 215 static char *next; 216 static int lookedup = 0; 217 218 if (!lookedup) { 219 if (host == NOSTR && (host = getenv("HOST")) == NOSTR) { 220 fprintf(stderr, "%s: no host specified\n", __progname); 221 exit(3); 222 } 223 getremcap(host); 224 next = DV; 225 lookedup++; 226 } 227 /* 228 * We return a new device each time we're called (to allow 229 * a rotary action to be simulated) 230 */ 231 if (next == NOSTR) 232 return (NOSTR); 233 if ((cp = strchr(next, ',')) == NULL) { 234 DV = next; 235 next = NOSTR; 236 } else { 237 *cp++ = '\0'; 238 DV = next; 239 next = cp; 240 } 241 return (DV); 242 } 243