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