remote.c revision 7527
1262566Sdes/* 299051Sdes * Copyright (c) 1992, 1993 357429Smarkm * The Regents of the University of California. All rights reserved. 498684Sdes * 598684Sdes * 676262Sgreen * Redistribution and use in source and binary forms, with or without 798941Sdes * modification, are permitted provided that the following conditions 898941Sdes * are met: 992559Sdes * 1. Redistributions of source code must retain the above copyright 1092559Sdes * notice, this list of conditions and the following disclaimer. 11226046Sdes * 2. Redistributions in binary form must reproduce the above copyright 1292559Sdes * notice, this list of conditions and the following disclaimer in the 1392559Sdes * documentation and/or other materials provided with the distribution. 1499051Sdes * 3. All advertising materials mentioning features or use of this software 1599051Sdes * must display the following acknowledgement: 1699051Sdes * This product includes software developed by the University of 1792559Sdes * California, Berkeley and its contributors. 18147005Sdes * 4. Neither the name of the University nor the names of its contributors 1957429Smarkm * may be used to endorse or promote products derived from this software 2057429Smarkm * without specific prior written permission. 2169591Sgreen * 22204917Sdes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23204917Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24181111Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2592559Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2692559Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2792559Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28181111Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2992559Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30221420Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31262566Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3257429Smarkm * SUCH DAMAGE. 3392559Sdes */ 34124211Sdes 35181111Sdes#ifndef lint 3692559Sdesstatic char copyright[] = 37255767Sdes"@(#) Copyright (c) 1992, 1993\n\ 38255767Sdes The Regents of the University of California. All rights reserved.\n"; 39255767Sdes#endif /* not lint */ 4057429Smarkm 41149753Sdes#ifndef lint 4292559Sdesstatic char sccsid[] = "@(#)remote.c 8.1 (Berkeley) 6/6/93"; 4392559Sdes#endif /* not lint */ 4457429Smarkm 4592559Sdes#include <sys/syslimits.h> 4692559Sdes#include <stdio.h> 47124211Sdes#include <stdlib.h> 4899051Sdes 4992559Sdes#include "tipconf.h" 50137019Sdes#include "tip.h" 51181111Sdes#include "pathnames.h" 5292559Sdes 5392559Sdes/* 5492559Sdes * Attributes to be gleened from remote host description 5592559Sdes * data base. 56226046Sdes */ 57248465Sdesstatic char **caps[] = { 58226046Sdes &AT, &DV, &CM, &CU, &EL, &IE, &OE, &PN, &PR, &DI, 59240075Sdes &ES, &EX, &FO, &RC, &RE, &PA, &LI, &LO 60240075Sdes}; 61248619Sdes 62248619Sdesstatic char *capstrings[] = { 63248619Sdes "at", "dv", "cm", "cu", "el", "ie", "oe", "pn", "pr", 6492559Sdes "di", "es", "ex", "fo", "rc", "re", "pa", "li", "lo", 0 6592559Sdes}; 6676262Sgreen 6792559Sdesstatic char *db_array[3] = { _PATH_REMOTE, 0, 0 }; 6892559Sdes 6992559Sdes#define cgetflag(f) (cgetcap(bp, f, ':') != NULL) 7092559Sdes 71124211Sdes/* 72124211Sdes Expand the start tilde sequence at the start of the 7357429Smarkm specified path. Optionally, free space allocated to 74126009Sdes path before reinitializing it. 75126009Sdes*/ 7692559Sdesstatic int 7776262Sgreenexpand_tilde (char **path, void (*free) (char *p)) 7899315Sdes{ 7995456Sdes int rc = 0; 8057429Smarkm char buffer [PATH_MAX]; 8192559Sdes char *tailp; 8298684Sdes if ((tailp = strchr (*path + 1, '/')) != NULL) 8357429Smarkm { 8492559Sdes struct passwd *pwd; 85126277Sdes *tailp++ = '\0'; 8657429Smarkm if (*(*path + 1) == '\0') 87124211Sdes strcpy (buffer, getlogin ()); 88124211Sdes else 89126277Sdes strcpy (buffer, *path + 1); 9057429Smarkm if ((pwd = getpwnam (buffer)) != NULL) 91162856Sdes { 92262566Sdes strcpy (buffer, pwd->pw_dir); 93162856Sdes strcat (buffer, "/"); 94162856Sdes strcat (buffer, tailp); 95162856Sdes if (free) 96162856Sdes free (*path); 97162856Sdes *path = strdup (buffer); 98162856Sdes rc++; 99162856Sdes } 100127033Sdes return rc; 10192559Sdes } 102181111Sdes} 103124211Sdes 104124211Sdesstatic 10599051Sdesgetremcap(host) 10692559Sdes register char *host; 10792559Sdes{ 108262566Sdes register char **p, ***q; 10992559Sdes char *bp; 11092559Sdes char *rempath; 111126277Sdes int stat; 11257429Smarkm 113262566Sdes rempath = getenv("REMOTE"); 114106130Sdes if (rempath != NULL) 115149753Sdes if (*rempath != '/') 116124211Sdes /* we have an entry */ 117124211Sdes cgetset(rempath); 118124211Sdes else { /* we have a path */ 119124211Sdes db_array[1] = rempath; 120248619Sdes db_array[2] = _PATH_REMOTE; 121157019Sdes } 122181111Sdes 123264692Sdes if ((stat = cgetent(&bp, db_array, host)) < 0) { 12465674Skris if (DV || 12592559Sdes host[0] == '/' && access(DV = host, R_OK | W_OK) == 0) { 126181111Sdes CU = DV; 12776262Sgreen HO = host; 12892559Sdes HW = 1; 12976262Sgreen DU = 0; 130162856Sdes if (!BR) 131224638Sbrooks BR = DEFBR; 132224638Sbrooks FS = DEFFS; 133224638Sbrooks return; 134224638Sbrooks } 135224638Sbrooks switch(stat) { 136224638Sbrooks case -1: 137224638Sbrooks fprintf(stderr, "tip: unknown host %s\n", host); 138224638Sbrooks break; 139224638Sbrooks case -2: 140224638Sbrooks fprintf(stderr, 141224638Sbrooks "tip: can't open host description file\n"); 142224638Sbrooks break; 143162856Sdes case -3: 144162856Sdes fprintf(stderr, 145162856Sdes "tip: possible reference loop in host description file\n"); 146162856Sdes break; 147262566Sdes } 148162856Sdes exit(3); 149 } 150 151 for (p = capstrings, q = caps; *p != NULL; p++, q++) 152 if (**q == NULL) 153 cgetstr(bp, *p, *q); 154 if (!BR && (cgetnum(bp, "br", &BR) == -1)) 155 BR = DEFBR; 156 if (cgetnum(bp, "fs", &FS) == -1) 157 FS = DEFFS; 158 if (DU < 0) 159 DU = 0; 160 else 161 DU = cgetflag("du"); 162 if (DV == NOSTR) { 163 fprintf(stderr, "%s: missing device spec\n", host); 164 exit(3); 165 } 166 if (DU && CU == NOSTR) 167 CU = DV; 168 if (DU && PN == NOSTR) { 169 fprintf(stderr, "%s: missing phone number\n", host); 170 exit(3); 171 } 172 173 HD = cgetflag("hd"); 174 175 /* 176 * This effectively eliminates the "hw" attribute 177 * from the description file 178 */ 179 if (!HW) 180 HW = (CU == NOSTR) || (DU && equal(DV, CU)); 181 HO = host; 182 183 /* 184 If login script, verify access 185 */ 186 if (LI != NOSTR) { 187 if (*LI == '~') 188 (void) expand_tilde (&LI, NULL); 189 if (access (LI, F_OK | X_OK) != 0) { 190 printf("tip (warning): can't open login script \"%s\"\n", LI); 191 LI = NOSTR; 192 } 193 } 194 195 /* 196 If logout script, verify access 197 */ 198 if (LO != NOSTR) { 199 if (*LO == '~') 200 (void) expand_tilde (&LO, NULL); 201 if (access (LO, F_OK | X_OK) != 0) { 202 printf("tip (warning): can't open logout script \"%s\"\n", LO); 203 LO = NOSTR; 204 } 205 } 206 207 /* 208 * see if uppercase mode should be turned on initially 209 */ 210 if (cgetflag("ra")) 211 boolean(value(RAISE)) = 1; 212 if (cgetflag("ec")) 213 boolean(value(ECHOCHECK)) = 1; 214 if (cgetflag("be")) 215 boolean(value(BEAUTIFY)) = 1; 216 if (cgetflag("nb")) 217 boolean(value(BEAUTIFY)) = 0; 218 if (cgetflag("sc")) 219 boolean(value(SCRIPT)) = 1; 220 if (cgetflag("tb")) 221 boolean(value(TABEXPAND)) = 1; 222 if (cgetflag("vb")) 223 boolean(value(VERBOSE)) = 1; 224 if (cgetflag("nv")) 225 boolean(value(VERBOSE)) = 0; 226 if (cgetflag("ta")) 227 boolean(value(TAND)) = 1; 228 if (cgetflag("nt")) 229 boolean(value(TAND)) = 0; 230 if (cgetflag("rw")) 231 boolean(value(RAWFTP)) = 1; 232 if (cgetflag("hd")) 233 boolean(value(HALFDUPLEX)) = 1; 234 if (RE == NOSTR) 235 RE = (char *)"tip.record"; 236 if (EX == NOSTR) 237 EX = (char *)"\t\n\b\f"; 238 if (ES != NOSTR) 239 vstring("es", ES); 240 if (FO != NOSTR) 241 vstring("fo", FO); 242 if (PR != NOSTR) 243 vstring("pr", PR); 244 if (RC != NOSTR) 245 vstring("rc", RC); 246 if (cgetnum(bp, "dl", &DL) == -1) 247 DL = 0; 248 if (cgetnum(bp, "cl", &CL) == -1) 249 CL = 0; 250 if (cgetnum(bp, "et", &ET) == -1) 251 ET = 10; 252} 253 254char * 255getremote(host) 256 char *host; 257{ 258 register char *cp; 259 static char *next; 260 static int lookedup = 0; 261 262 if (!lookedup) { 263 if (host == NOSTR && (host = getenv("HOST")) == NOSTR) { 264 fprintf(stderr, "tip: no host specified\n"); 265 exit(3); 266 } 267 getremcap(host); 268 next = DV; 269 lookedup++; 270 } 271 /* 272 * We return a new device each time we're called (to allow 273 * a rotary action to be simulated) 274 */ 275 if (next == NOSTR) 276 return (NOSTR); 277 if ((cp = index(next, ',')) == NULL) { 278 DV = next; 279 next = NOSTR; 280 } else { 281 *cp++ = '\0'; 282 DV = next; 283 next = cp; 284 } 285 return (DV); 286} 287