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
expand_tilde(char ** path,void (* free)(char * p))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
getremcap(char * host)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 *
getremote(char * host)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