dumprmt.c revision 19239 
1/*-
2 * Copyright (c) 1980, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)dumprmt.c	8.1 (Berkeley) 6/5/93";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/mtio.h>
40#include <sys/ioctl.h>
41#include <sys/socket.h>
42#include <sys/time.h>
43#ifdef sunos
44#include <sys/vnode.h>
45
46#include <ufs/inode.h>
47#else
48#include <ufs/ufs/dinode.h>
49#endif
50
51#include <netinet/in.h>
52#include <netinet/in_systm.h>
53#include <netinet/ip.h>
54
55#include <protocols/dumprestore.h>
56
57#include <ctype.h>
58#include <netdb.h>
59#include <pwd.h>
60#include <signal.h>
61#include <stdio.h>
62#ifdef __STDC__
63#include <stdlib.h>
64#include <string.h>
65#include <unistd.h>
66#endif
67
68#include "pathnames.h"
69#include "dump.h"
70
71#define	TS_CLOSED	0
72#define	TS_OPEN		1
73
74static	int rmtstate = TS_CLOSED;
75static	int rmtape;
76static	char *rmtpeer;
77
78static	int okname __P((char *));
79static	int rmtcall __P((char *, char *));
80static	void rmtconnaborted __P((/* int, int */));
81static	int rmtgetb __P((void));
82static	void rmtgetconn __P((void));
83static	void rmtgets __P((char *, int));
84static	int rmtreply __P((char *));
85
86extern	int ntrec;		/* blocking factor on tape */
87
88int
89rmthost(host)
90	char *host;
91{
92
93	rmtpeer = malloc(strlen(host) + 1);
94	if (rmtpeer)
95		strcpy(rmtpeer, host);
96	else
97		rmtpeer = host;
98	signal(SIGPIPE, rmtconnaborted);
99	rmtgetconn();
100	if (rmtape < 0)
101		return (0);
102	return (1);
103}
104
105static void
106rmtconnaborted()
107{
108
109	(void) fprintf(stderr, "rdump: Lost connection to remote host.\n");
110	exit(1);
111}
112
113void
114rmtgetconn()
115{
116	register char *cp;
117	register const char *rmt;
118	static struct servent *sp = NULL;
119	static struct passwd *pwd = NULL;
120#ifdef notdef
121	static int on = 1;
122#endif
123	char *tuser;
124	int size;
125	int throughput;
126
127	if (sp == NULL) {
128		sp = getservbyname("shell", "tcp");
129		if (sp == NULL) {
130			(void) fprintf(stderr,
131			    "rdump: shell/tcp: unknown service\n");
132			exit(1);
133		}
134		pwd = getpwuid(getuid());
135		if (pwd == NULL) {
136			(void) fprintf(stderr, "rdump: who are you?\n");
137			exit(1);
138		}
139	}
140	if ((cp = index(rmtpeer, '@')) != NULL) {
141		tuser = rmtpeer;
142		*cp = '\0';
143		if (!okname(tuser))
144			exit(1);
145		rmtpeer = ++cp;
146	} else
147		tuser = pwd->pw_name;
148	if ((rmt = getenv("RMT")) == NULL)
149		rmt = _PATH_RMT;
150	rmtape = rcmd(&rmtpeer, (u_short)sp->s_port, pwd->pw_name, tuser,
151	    rmt, (int *)0);
152	if (rmtape < 0)
153		return;
154	size = ntrec * TP_BSIZE;
155	if (size > 60 * 1024)		/* XXX */
156		size = 60 * 1024;
157	/* Leave some space for rmt request/response protocol */
158	size += 2 * 1024;
159	while (size > TP_BSIZE &&
160	    setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
161		    size -= TP_BSIZE;
162	(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
163	throughput = IPTOS_THROUGHPUT;
164	if (setsockopt(rmtape, IPPROTO_IP, IP_TOS,
165	    &throughput, sizeof(throughput)) < 0)
166		perror("IP_TOS:IPTOS_THROUGHPUT setsockopt");
167
168#ifdef notdef
169	if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
170		perror("TCP_NODELAY setsockopt");
171#endif
172}
173
174static int
175okname(cp0)
176	char *cp0;
177{
178	register char *cp;
179	register int c;
180
181	for (cp = cp0; *cp; cp++) {
182		c = *cp;
183		if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
184			(void) fprintf(stderr, "rdump: invalid user name %s\n",
185			    cp0);
186			return (0);
187		}
188	}
189	return (1);
190}
191
192int
193rmtopen(tape, mode)
194	char *tape;
195	int mode;
196{
197	char buf[256];
198
199	(void)sprintf(buf, "O%s\n%d\n", tape, mode);
200	rmtstate = TS_OPEN;
201	return (rmtcall(tape, buf));
202}
203
204void
205rmtclose()
206{
207
208	if (rmtstate != TS_OPEN)
209		return;
210	rmtcall("close", "C\n");
211	rmtstate = TS_CLOSED;
212}
213
214int
215rmtread(buf, count)
216	char *buf;
217	int count;
218{
219	char line[30];
220	int n, i, cc;
221	extern errno;
222
223	(void)sprintf(line, "R%d\n", count);
224	n = rmtcall("read", line);
225	if (n < 0) {
226		errno = n;
227		return (-1);
228	}
229	for (i = 0; i < n; i += cc) {
230		cc = read(rmtape, buf+i, n - i);
231		if (cc <= 0) {
232			rmtconnaborted();
233		}
234	}
235	return (n);
236}
237
238int
239rmtwrite(buf, count)
240	char *buf;
241	int count;
242{
243	char line[30];
244
245	(void)sprintf(line, "W%d\n", count);
246	write(rmtape, line, strlen(line));
247	write(rmtape, buf, count);
248	return (rmtreply("write"));
249}
250
251void
252rmtwrite0(count)
253	int count;
254{
255	char line[30];
256
257	(void)sprintf(line, "W%d\n", count);
258	write(rmtape, line, strlen(line));
259}
260
261void
262rmtwrite1(buf, count)
263	char *buf;
264	int count;
265{
266
267	write(rmtape, buf, count);
268}
269
270int
271rmtwrite2()
272{
273
274	return (rmtreply("write"));
275}
276
277int
278rmtseek(offset, pos)
279	int offset, pos;
280{
281	char line[80];
282
283	(void)sprintf(line, "L%d\n%d\n", offset, pos);
284	return (rmtcall("seek", line));
285}
286
287struct	mtget mts;
288
289struct mtget *
290rmtstatus()
291{
292	register int i;
293	register char *cp;
294
295	if (rmtstate != TS_OPEN)
296		return (NULL);
297	rmtcall("status", "S\n");
298	for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++)
299		*cp++ = rmtgetb();
300	return (&mts);
301}
302
303int
304rmtioctl(cmd, count)
305	int cmd, count;
306{
307	char buf[256];
308
309	if (count < 0)
310		return (-1);
311	(void)sprintf(buf, "I%d\n%d\n", cmd, count);
312	return (rmtcall("ioctl", buf));
313}
314
315static int
316rmtcall(cmd, buf)
317	char *cmd, *buf;
318{
319
320	if (write(rmtape, buf, strlen(buf)) != strlen(buf))
321		rmtconnaborted();
322	return (rmtreply(cmd));
323}
324
325static int
326rmtreply(cmd)
327	char *cmd;
328{
329	register char *cp;
330	char code[30], emsg[BUFSIZ];
331
332	rmtgets(code, sizeof (code));
333	if (*code == 'E' || *code == 'F') {
334		rmtgets(emsg, sizeof (emsg));
335		msg("%s: %s", cmd, emsg);
336		if (*code == 'F') {
337			rmtstate = TS_CLOSED;
338			return (-1);
339		}
340		return (-1);
341	}
342	if (*code != 'A') {
343		/* Kill trailing newline */
344		cp = code + strlen(code);
345		if (cp > code && *--cp == '\n')
346			*cp = '\0';
347
348		msg("Protocol to remote tape server botched (code \"%s\").\n",
349		    code);
350		rmtconnaborted();
351	}
352	return (atoi(code + 1));
353}
354
355int
356rmtgetb()
357{
358	char c;
359
360	if (read(rmtape, &c, 1) != 1)
361		rmtconnaborted();
362	return (c);
363}
364
365/* Get a line (guaranteed to have a trailing newline). */
366void
367rmtgets(line, len)
368	char *line;
369	int len;
370{
371	register char *cp = line;
372
373	while (len > 1) {
374		*cp = rmtgetb();
375		if (*cp == '\n') {
376			cp[1] = '\0';
377			return;
378		}
379		cp++;
380		len--;
381	}
382	*cp = '\0';
383	msg("Protocol to remote tape server botched.\n");
384	msg("(rmtgets got \"%s\").\n", line);
385	rmtconnaborted();
386}
387