1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#) Copyright (c) 1992, 1993 The Regents of the University of California. All rights reserved. 35 * @(#)remote.c 8.1 (Berkeley) 6/6/93 36 * $FreeBSD: src/usr.bin/tip/tip/remote.c,v 1.4 1999/08/28 01:06:35 peter Exp $ 37 */ 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 43 #include "tipconf.h" 44 #include "tip.h" 45 #include "pathnames.h" 46 47 /* 48 * Attributes to be gleened from remote host description 49 * data base. 50 */ 51 static char **caps[] = { 52 &AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN, &PR, &DI, 53 &ES, &EX, &FO, &RC, &RE, &PA, &LI, &LO 54 }; 55 56 static char *capstrings[] = { 57 "at", "dv", "cm", "cu", "el", "ie", "oe", "pn", "pr", 58 "di", "es", "ex", "fo", "rc", "re", "pa", "li", "lo", 0 59 }; 60 61 static char *db_array[3] = { _PATH_REMOTE, 0, 0 }; 62 63 #define cgetflag(f) (cgetcap(bp, f, ':') != NULL) 64 65 static void getremcap(char *); 66 67 /* 68 Expand the start tilde sequence at the start of the 69 specified path. Optionally, free space allocated to 70 path before reinitializing it. 71 */ 72 static int 73 expand_tilde (char **path, void (*free) (char *p)) 74 { 75 int rc = 0; 76 char buffer [PATH_MAX]; 77 char *tailp; 78 if ((tailp = strchr (*path + 1, '/')) != NULL) 79 { 80 struct passwd *pwd; 81 *tailp++ = '\0'; 82 if (*(*path + 1) == '\0') 83 strcpy (buffer, getlogin ()); 84 else 85 strcpy (buffer, *path + 1); 86 if ((pwd = getpwnam (buffer)) != NULL) 87 { 88 strcpy (buffer, pwd->pw_dir); 89 strcat (buffer, "/"); 90 strcat (buffer, tailp); 91 if (free) 92 free (*path); 93 *path = strdup (buffer); 94 rc++; 95 } 96 return rc; 97 } 98 return (-1); 99 } 100 101 static void 102 getremcap(char *host) 103 { 104 char **p, ***q; 105 char *bp; 106 char *rempath; 107 int stat; 108 109 rempath = getenv("REMOTE"); 110 if (rempath != NULL) { 111 if (*rempath != '/') 112 /* we have an entry */ 113 cgetset(rempath); 114 else { /* we have a path */ 115 db_array[1] = rempath; 116 db_array[2] = _PATH_REMOTE; 117 } 118 } 119 120 if ((stat = cgetent(&bp, db_array, host)) < 0) { 121 if (DV || 122 (host[0] == '/' && access(DV = host, R_OK | W_OK) == 0)) { 123 CU = DV; 124 HO = host; 125 HW = 1; 126 DU = 0; 127 if (!BR) 128 BR = DEFBR; 129 FS = DEFFS; 130 return; 131 } 132 switch(stat) { 133 case -1: 134 warnx("unknown host %s", host); 135 break; 136 case -2: 137 warnx("can't open host description file"); 138 break; 139 case -3: 140 warnx("possible reference loop in host description file"); 141 break; 142 } 143 exit(3); 144 } 145 146 for (p = capstrings, q = caps; *p != NULL; p++, q++) 147 if (**q == NULL) 148 cgetstr(bp, *p, *q); 149 if (!BR && (cgetnum(bp, "br", &BR) == -1)) 150 BR = DEFBR; 151 if (cgetnum(bp, "fs", &FS) == -1) 152 FS = DEFFS; 153 if (DU < 0) 154 DU = 0; 155 else 156 DU = cgetflag("du"); 157 if (DV == NULL) { 158 fprintf(stderr, "%s: missing device spec\n", host); 159 exit(3); 160 } 161 if (DU && CU == NULL) 162 CU = DV; 163 if (DU && PN == NULL) { 164 fprintf(stderr, "%s: missing phone number\n", host); 165 exit(3); 166 } 167 168 HD = cgetflag("hd"); 169 170 /* 171 * This effectively eliminates the "hw" attribute 172 * from the description file 173 */ 174 if (!HW) 175 HW = (CU == NULL) || (DU && equal(DV, CU)); 176 HO = host; 177 178 /* 179 If login script, verify access 180 */ 181 if (LI != NULL) { 182 if (*LI == '~') 183 (void) expand_tilde (&LI, NULL); 184 if (access (LI, F_OK | X_OK) != 0) { 185 printf("tip (warning): can't open login script \"%s\"\n", LI); 186 LI = NULL; 187 } 188 } 189 190 /* 191 If logout script, verify access 192 */ 193 if (LO != NULL) { 194 if (*LO == '~') 195 (void) expand_tilde (&LO, NULL); 196 if (access (LO, F_OK | X_OK) != 0) { 197 printf("tip (warning): can't open logout script \"%s\"\n", LO); 198 LO = NULL; 199 } 200 } 201 202 /* 203 * see if uppercase mode should be turned on initially 204 */ 205 if (cgetflag("ra")) 206 boolean(value(RAISE)) = 1; 207 if (cgetflag("ec")) 208 boolean(value(ECHOCHECK)) = 1; 209 if (cgetflag("be")) 210 boolean(value(BEAUTIFY)) = 1; 211 if (cgetflag("nb")) 212 boolean(value(BEAUTIFY)) = 0; 213 if (cgetflag("sc")) 214 boolean(value(SCRIPT)) = 1; 215 if (cgetflag("tb")) 216 boolean(value(TABEXPAND)) = 1; 217 if (cgetflag("vb")) 218 boolean(value(VERBOSE)) = 1; 219 if (cgetflag("nv")) 220 boolean(value(VERBOSE)) = 0; 221 if (cgetflag("ta")) 222 boolean(value(TAND)) = 1; 223 if (cgetflag("nt")) 224 boolean(value(TAND)) = 0; 225 if (cgetflag("rw")) 226 boolean(value(RAWFTP)) = 1; 227 if (cgetflag("hd")) 228 boolean(value(HALFDUPLEX)) = 1; 229 if (RE == NULL) 230 RE = (char *)"tip.record"; 231 if (EX == NULL) 232 EX = (char *)"\t\n\b\f"; 233 if (ES != NULL) 234 vstring("es", ES); 235 if (FO != NULL) 236 vstring("fo", FO); 237 if (PR != NULL) 238 vstring("pr", PR); 239 if (RC != NULL) 240 vstring("rc", RC); 241 if (cgetnum(bp, "dl", &DL) == -1) 242 DL = 0; 243 if (cgetnum(bp, "cl", &CL) == -1) 244 CL = 0; 245 if (cgetnum(bp, "et", &ET) == -1) 246 ET = 10; 247 } 248 249 char * 250 getremote(char *host) 251 { 252 char *cp; 253 static char *next; 254 static int lookedup = 0; 255 256 if (!lookedup) { 257 if (host == NULL && (host = getenv("HOST")) == NULL) 258 errx(3, "no host specified"); 259 getremcap(host); 260 next = DV; 261 lookedup++; 262 } 263 /* 264 * We return a new device each time we're called (to allow 265 * a rotary action to be simulated) 266 */ 267 if (next == NULL) 268 return (NULL); 269 if ((cp = index(next, ',')) == NULL) { 270 DV = next; 271 next = NULL; 272 } else { 273 *cp++ = '\0'; 274 DV = next; 275 next = cp; 276 } 277 return (DV); 278 } 279