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 "tip.h" 44 #include "pathnames.h" 45 46 /* 47 * Attributes to be gleened from remote host description 48 * data base. 49 */ 50 static char **caps[] = { 51 &AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN, &PR, &DI, 52 &ES, &EX, &FO, &RC, &RE, &PA, &LI, &LO 53 }; 54 55 static char *capstrings[] = { 56 "at", "dv", "cm", "cu", "el", "ie", "oe", "pn", "pr", 57 "di", "es", "ex", "fo", "rc", "re", "pa", "li", "lo", 0 58 }; 59 60 static char *db_array[3] = { _PATH_REMOTE, 0, 0 }; 61 62 #define cgetflag(f) (cgetcap(bp, f, ':') != NULL) 63 64 static void getremcap(char *); 65 66 /* 67 Expand the start tilde sequence at the start of the 68 specified path. Optionally, free space allocated to 69 path before reinitializing it. 70 */ 71 static int 72 expand_tilde (char **path, void (*free) (char *p)) 73 { 74 int rc = 0; 75 char buffer [PATH_MAX]; 76 char *tailp; 77 if ((tailp = strchr (*path + 1, '/')) != NULL) 78 { 79 struct passwd *pwd; 80 *tailp++ = '\0'; 81 if (*(*path + 1) == '\0') 82 strcpy (buffer, getlogin ()); 83 else 84 strcpy (buffer, *path + 1); 85 if ((pwd = getpwnam (buffer)) != NULL) 86 { 87 strcpy (buffer, pwd->pw_dir); 88 strcat (buffer, "/"); 89 strcat (buffer, tailp); 90 if (free) 91 free (*path); 92 *path = strdup (buffer); 93 rc++; 94 } 95 return rc; 96 } 97 return (-1); 98 } 99 100 static void 101 getremcap(char *host) 102 { 103 char **p, ***q; 104 char *bp; 105 char *rempath; 106 int stat; 107 108 rempath = getenv("REMOTE"); 109 if (rempath != NULL) { 110 if (*rempath != '/') 111 /* we have an entry */ 112 cgetset(rempath); 113 else { /* we have a path */ 114 db_array[1] = rempath; 115 db_array[2] = _PATH_REMOTE; 116 } 117 } 118 119 if ((stat = cgetent(&bp, db_array, host)) < 0) { 120 if (DV || 121 (host[0] == '/' && access(DV = host, R_OK | W_OK) == 0)) { 122 CU = DV; 123 HO = host; 124 HW = 1; 125 DU = 0; 126 if (!BR) 127 BR = DEFBR; 128 FS = BUFSIZ; 129 return; 130 } 131 switch(stat) { 132 case -1: 133 warnx("unknown host %s", host); 134 break; 135 case -2: 136 warnx("can't open host description file"); 137 break; 138 case -3: 139 warnx("possible reference loop in host description file"); 140 break; 141 } 142 exit(3); 143 } 144 145 for (p = capstrings, q = caps; *p != NULL; p++, q++) 146 if (**q == NULL) 147 cgetstr(bp, *p, *q); 148 if (!BR && (cgetnum(bp, "br", &BR) == -1)) 149 BR = DEFBR; 150 if (cgetnum(bp, "fs", &FS) == -1) 151 FS = BUFSIZ; 152 if (DU < 0) 153 DU = 0; 154 else 155 DU = cgetflag("du"); 156 if (DV == NULL) { 157 fprintf(stderr, "%s: missing device spec\n", host); 158 exit(3); 159 } 160 if (DU && CU == NULL) 161 CU = DV; 162 if (DU && PN == NULL) { 163 fprintf(stderr, "%s: missing phone number\n", host); 164 exit(3); 165 } 166 167 HD = cgetflag("hd"); 168 169 /* 170 * This effectively eliminates the "hw" attribute 171 * from the description file 172 */ 173 if (!HW) 174 HW = (CU == NULL) || (DU && equal(DV, CU)); 175 HO = host; 176 177 /* 178 If login script, verify access 179 */ 180 if (LI != NULL) { 181 if (*LI == '~') 182 (void) expand_tilde (&LI, NULL); 183 if (access (LI, F_OK | X_OK) != 0) { 184 printf("tip (warning): can't open login script \"%s\"\n", LI); 185 LI = NULL; 186 } 187 } 188 189 /* 190 If logout script, verify access 191 */ 192 if (LO != NULL) { 193 if (*LO == '~') 194 (void) expand_tilde (&LO, NULL); 195 if (access (LO, F_OK | X_OK) != 0) { 196 printf("tip (warning): can't open logout script \"%s\"\n", LO); 197 LO = NULL; 198 } 199 } 200 201 /* 202 * see if uppercase mode should be turned on initially 203 */ 204 if (cgetflag("ra")) 205 boolean(value(RAISE)) = 1; 206 if (cgetflag("ec")) 207 boolean(value(ECHOCHECK)) = 1; 208 if (cgetflag("be")) 209 boolean(value(BEAUTIFY)) = 1; 210 if (cgetflag("nb")) 211 boolean(value(BEAUTIFY)) = 0; 212 if (cgetflag("sc")) 213 boolean(value(SCRIPT)) = 1; 214 if (cgetflag("tb")) 215 boolean(value(TABEXPAND)) = 1; 216 if (cgetflag("vb")) 217 boolean(value(VERBOSE)) = 1; 218 if (cgetflag("nv")) 219 boolean(value(VERBOSE)) = 0; 220 if (cgetflag("ta")) 221 boolean(value(TAND)) = 1; 222 if (cgetflag("nt")) 223 boolean(value(TAND)) = 0; 224 if (cgetflag("rw")) 225 boolean(value(RAWFTP)) = 1; 226 if (cgetflag("hd")) 227 boolean(value(HALFDUPLEX)) = 1; 228 if (RE == NULL) 229 RE = (char *)"tip.record"; 230 if (EX == NULL) 231 EX = (char *)"\t\n\b\f"; 232 if (ES != NULL) 233 vstring("es", ES); 234 if (FO != NULL) 235 vstring("fo", FO); 236 if (PR != NULL) 237 vstring("pr", PR); 238 if (RC != NULL) 239 vstring("rc", RC); 240 if (cgetnum(bp, "dl", &DL) == -1) 241 DL = 0; 242 if (cgetnum(bp, "cl", &CL) == -1) 243 CL = 0; 244 if (cgetnum(bp, "et", &ET) == -1) 245 ET = 10; 246 } 247 248 char * 249 getremote(char *host) 250 { 251 char *cp; 252 static char *next; 253 static int lookedup = 0; 254 255 if (!lookedup) { 256 if (host == NULL && (host = getenv("HOST")) == NULL) 257 errx(3, "no host specified"); 258 getremcap(host); 259 next = DV; 260 lookedup++; 261 } 262 /* 263 * We return a new device each time we're called (to allow 264 * a rotary action to be simulated) 265 */ 266 if (next == NULL) 267 return (NULL); 268 if ((cp = index(next, ',')) == NULL) { 269 DV = next; 270 next = NULL; 271 } else { 272 *cp++ = '\0'; 273 DV = next; 274 next = cp; 275 } 276 return (DV); 277 } 278