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Commit | Line | Data |
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1227625a SP |
1 | /* |
2 | * Ported to Linux's Second Extended File System as part of the | |
3 | * dump and restore backup suit | |
b45f51d6 SP |
4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 |
5 | * Stelian Pop <pop@cybercable.fr>, 1999 | |
1227625a | 6 | * |
ec387a12 | 7 | * $Id: dumprmt.c,v 1.5 1999/10/11 13:31:08 stelian Exp $ |
1227625a SP |
8 | */ |
9 | ||
10 | /*- | |
11 | * Copyright (c) 1980, 1993 | |
12 | * The Regents of the University of California. All rights reserved. | |
13 | * | |
14 | * Redistribution and use in source and binary forms, with or without | |
15 | * modification, are permitted provided that the following conditions | |
16 | * are met: | |
17 | * 1. Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * 2. Redistributions in binary form must reproduce the above copyright | |
20 | * notice, this list of conditions and the following disclaimer in the | |
21 | * documentation and/or other materials provided with the distribution. | |
22 | * 3. All advertising materials mentioning features or use of this software | |
23 | * must display the following acknowledgement: | |
24 | * This product includes software developed by the University of | |
25 | * California, Berkeley and its contributors. | |
26 | * 4. Neither the name of the University nor the names of its contributors | |
27 | * may be used to endorse or promote products derived from this software | |
28 | * without specific prior written permission. | |
29 | * | |
30 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
31 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
32 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
33 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
34 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
35 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
36 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
37 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
38 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
39 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
40 | * SUCH DAMAGE. | |
41 | */ | |
42 | ||
43 | #ifndef lint | |
b45f51d6 SP |
44 | #if 0 |
45 | static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95"; | |
46 | #endif | |
47 | static const char rcsid[] = | |
ec387a12 | 48 | "$Id: dumprmt.c,v 1.5 1999/10/11 13:31:08 stelian Exp $"; |
1227625a SP |
49 | #endif /* not lint */ |
50 | ||
b45f51d6 SP |
51 | #ifdef __linux__ |
52 | #include <sys/types.h> | |
53 | #include <linux/types.h> | |
54 | #endif | |
1227625a SP |
55 | #include <sys/param.h> |
56 | #include <sys/mtio.h> | |
1227625a SP |
57 | #include <sys/socket.h> |
58 | #include <sys/time.h> | |
59 | #ifdef __linux__ | |
60 | #include <linux/ext2_fs.h> | |
61 | #include <bsdcompat.h> | |
b45f51d6 | 62 | #include <signal.h> |
1227625a SP |
63 | #else |
64 | #ifdef sunos | |
65 | #include <sys/vnode.h> | |
66 | ||
67 | #include <ufs/inode.h> | |
68 | #else | |
69 | #include <ufs/ufs/dinode.h> | |
70 | #endif | |
71 | #endif | |
72 | ||
73 | #include <netinet/in.h> | |
b45f51d6 SP |
74 | #include <netinet/in_systm.h> |
75 | #include <netinet/ip.h> | |
1227625a SP |
76 | #include <netinet/tcp.h> |
77 | ||
78 | #include <protocols/dumprestore.h> | |
79 | ||
80 | #include <ctype.h> | |
ddd2ef55 SP |
81 | #include <errno.h> |
82 | #include <compaterr.h> | |
1227625a SP |
83 | #include <netdb.h> |
84 | #include <pwd.h> | |
1227625a SP |
85 | #include <stdio.h> |
86 | #ifdef __STDC__ | |
87 | #include <stdlib.h> | |
88 | #include <string.h> | |
89 | #include <unistd.h> | |
90 | #endif | |
91 | ||
92 | #ifdef __linux__ | |
93 | #include <ext2fs/ext2fs.h> | |
94 | #endif | |
95 | ||
96 | #include "pathnames.h" | |
97 | #include "dump.h" | |
98 | ||
99 | #define TS_CLOSED 0 | |
100 | #define TS_OPEN 1 | |
101 | ||
102 | static int rmtstate = TS_CLOSED; | |
ddd2ef55 SP |
103 | static int rmtape = -1; |
104 | static const char *rmtpeer = 0; | |
1227625a | 105 | |
ddd2ef55 SP |
106 | static int okname __P((const char *)); |
107 | static int rmtcall __P((const char *, const char *)); | |
108 | static void rmtconnaborted __P((int)); | |
1227625a SP |
109 | static int rmtgetb __P((void)); |
110 | static void rmtgetconn __P((void)); | |
ddd2ef55 SP |
111 | static void rmtgets __P((char *, size_t)); |
112 | static int rmtreply __P((const char *)); | |
b45f51d6 SP |
113 | #ifdef KERBEROS |
114 | int krcmd __P((char **, int /*u_short*/, char *, char *, int *, char *)); | |
115 | #endif | |
1227625a | 116 | |
b45f51d6 SP |
117 | static int errfd = -1; |
118 | extern int dokerberos; | |
1227625a | 119 | extern int ntrec; /* blocking factor on tape */ |
ddd2ef55 SP |
120 | #ifndef errno |
121 | extern int errno; | |
122 | #endif | |
1227625a SP |
123 | |
124 | int | |
ddd2ef55 | 125 | rmthost(const char *host) |
1227625a | 126 | { |
1227625a | 127 | if (rmtpeer) |
ddd2ef55 SP |
128 | free((void *)rmtpeer); |
129 | if ((rmtpeer = strdup(host)) == NULL) | |
1227625a SP |
130 | rmtpeer = host; |
131 | signal(SIGPIPE, rmtconnaborted); | |
132 | rmtgetconn(); | |
133 | if (rmtape < 0) | |
134 | return (0); | |
135 | return (1); | |
136 | } | |
137 | ||
138 | static void | |
ddd2ef55 | 139 | rmtconnaborted(int signo) |
1227625a | 140 | { |
b45f51d6 SP |
141 | msg("Lost connection to remote host.\n"); |
142 | if (errfd != -1) { | |
143 | fd_set r; | |
144 | struct timeval t; | |
145 | ||
146 | FD_ZERO(&r); | |
147 | FD_SET(errfd, &r); | |
148 | t.tv_sec = 0; | |
149 | t.tv_usec = 0; | |
150 | if (select(errfd + 1, &r, NULL, NULL, &t)) { | |
151 | int i; | |
152 | char buf[2048]; | |
153 | ||
154 | if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) { | |
155 | buf[i] = '\0'; | |
156 | msg("on %s: %s%s", rmtpeer, buf, | |
157 | buf[i - 1] == '\n' ? "" : "\n"); | |
158 | } | |
159 | } | |
160 | } | |
1227625a | 161 | |
b45f51d6 | 162 | exit(X_ABORT); |
1227625a SP |
163 | } |
164 | ||
ddd2ef55 SP |
165 | static void |
166 | rmtgetconn(void) | |
1227625a SP |
167 | { |
168 | register char *cp; | |
b45f51d6 | 169 | register const char *rmt; |
1227625a SP |
170 | static struct servent *sp = NULL; |
171 | static struct passwd *pwd = NULL; | |
ddd2ef55 | 172 | const char *tuser; |
1227625a | 173 | int size; |
b45f51d6 SP |
174 | int throughput; |
175 | int on; | |
1227625a SP |
176 | |
177 | if (sp == NULL) { | |
b45f51d6 | 178 | sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp"); |
ddd2ef55 SP |
179 | if (sp == NULL) |
180 | errx(1, "%s/tcp: unknown service", | |
b45f51d6 | 181 | dokerberos ? "kshell" : "shell"); |
1227625a | 182 | pwd = getpwuid(getuid()); |
ddd2ef55 SP |
183 | if (pwd == NULL) |
184 | errx(1, "who are you?"); | |
1227625a SP |
185 | } |
186 | if ((cp = strchr(rmtpeer, '@')) != NULL) { | |
187 | tuser = rmtpeer; | |
188 | *cp = '\0'; | |
189 | if (!okname(tuser)) | |
b45f51d6 | 190 | exit(X_STARTUP); |
1227625a SP |
191 | rmtpeer = ++cp; |
192 | } else | |
193 | tuser = pwd->pw_name; | |
b45f51d6 SP |
194 | if ((rmt = getenv("RMT")) == NULL) |
195 | rmt = _PATH_RMT; | |
196 | msg(""); | |
197 | #ifdef KERBEROS | |
198 | if (dokerberos) | |
ddd2ef55 | 199 | rmtape = krcmd((char **)&rmtpeer, sp->s_port, tuser, rmt, &errfd, |
b45f51d6 SP |
200 | (char *)0); |
201 | else | |
202 | #endif | |
ddd2ef55 | 203 | rmtape = rcmd((char **)&rmtpeer, (u_short)sp->s_port, pwd->pw_name, |
b45f51d6 SP |
204 | tuser, rmt, &errfd); |
205 | if (rmtape < 0) { | |
206 | msg("login to %s as %s failed.\n", rmtpeer, tuser); | |
207 | return; | |
208 | } | |
209 | (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer); | |
1227625a SP |
210 | size = ntrec * TP_BSIZE; |
211 | if (size > 60 * 1024) /* XXX */ | |
212 | size = 60 * 1024; | |
213 | /* Leave some space for rmt request/response protocol */ | |
214 | size += 2 * 1024; | |
215 | while (size > TP_BSIZE && | |
216 | setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) | |
217 | size -= TP_BSIZE; | |
218 | (void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); | |
b45f51d6 SP |
219 | throughput = IPTOS_THROUGHPUT; |
220 | if (setsockopt(rmtape, IPPROTO_IP, IP_TOS, | |
221 | &throughput, sizeof(throughput)) < 0) | |
222 | perror("IP_TOS:IPTOS_THROUGHPUT setsockopt"); | |
223 | on = 1; | |
1227625a SP |
224 | if (setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) |
225 | perror("TCP_NODELAY setsockopt"); | |
1227625a SP |
226 | } |
227 | ||
228 | static int | |
ddd2ef55 | 229 | okname(const char *cp0) |
1227625a | 230 | { |
ddd2ef55 | 231 | register const char *cp; |
1227625a SP |
232 | register int c; |
233 | ||
234 | for (cp = cp0; *cp; cp++) { | |
235 | c = *cp; | |
236 | if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { | |
ddd2ef55 | 237 | warnx("invalid user name %s\n", cp0); |
1227625a SP |
238 | return (0); |
239 | } | |
240 | } | |
241 | return (1); | |
242 | } | |
243 | ||
244 | int | |
ddd2ef55 | 245 | rmtopen(const char *tape, int mode) |
1227625a | 246 | { |
ddd2ef55 | 247 | char buf[MAXPATHLEN]; |
1227625a | 248 | |
ddd2ef55 | 249 | (void)snprintf(buf, sizeof (buf), "O%s\n%d\n", tape, mode); |
1227625a SP |
250 | rmtstate = TS_OPEN; |
251 | return (rmtcall(tape, buf)); | |
252 | } | |
253 | ||
254 | void | |
ddd2ef55 | 255 | rmtclose(void) |
1227625a SP |
256 | { |
257 | ||
258 | if (rmtstate != TS_OPEN) | |
259 | return; | |
260 | rmtcall("close", "C\n"); | |
261 | rmtstate = TS_CLOSED; | |
262 | } | |
263 | ||
264 | int | |
ddd2ef55 | 265 | rmtread(char *buf, size_t count) |
1227625a SP |
266 | { |
267 | char line[30]; | |
ddd2ef55 SP |
268 | int n, i; |
269 | ssize_t cc; | |
1227625a | 270 | |
ddd2ef55 | 271 | (void)snprintf(line, sizeof (line), "R%u\n", (unsigned)count); |
1227625a | 272 | n = rmtcall("read", line); |
b45f51d6 SP |
273 | if (n < 0) |
274 | /* rmtcall() properly sets errno for us on errors. */ | |
275 | return (n); | |
1227625a SP |
276 | for (i = 0; i < n; i += cc) { |
277 | cc = read(rmtape, buf+i, n - i); | |
b45f51d6 | 278 | if (cc <= 0) |
ddd2ef55 | 279 | rmtconnaborted(0); |
1227625a SP |
280 | } |
281 | return (n); | |
282 | } | |
283 | ||
284 | int | |
ddd2ef55 | 285 | rmtwrite(const char *buf, size_t count) |
1227625a SP |
286 | { |
287 | char line[30]; | |
288 | ||
b45f51d6 | 289 | (void)snprintf(line, sizeof (line), "W%d\n", count); |
1227625a SP |
290 | write(rmtape, line, strlen(line)); |
291 | write(rmtape, buf, count); | |
292 | return (rmtreply("write")); | |
293 | } | |
294 | ||
1227625a | 295 | int |
ddd2ef55 | 296 | rmtseek(int offset, int pos) |
1227625a SP |
297 | { |
298 | char line[80]; | |
299 | ||
b45f51d6 | 300 | (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos); |
1227625a SP |
301 | return (rmtcall("seek", line)); |
302 | } | |
303 | ||
304 | struct mtget mts; | |
305 | ||
306 | struct mtget * | |
ddd2ef55 | 307 | rmtstatus(void) |
1227625a SP |
308 | { |
309 | register int i; | |
310 | register char *cp; | |
311 | ||
312 | if (rmtstate != TS_OPEN) | |
313 | return (NULL); | |
314 | rmtcall("status", "S\n"); | |
315 | for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) | |
316 | *cp++ = rmtgetb(); | |
317 | return (&mts); | |
318 | } | |
319 | ||
320 | int | |
ddd2ef55 | 321 | rmtioctl(int cmd, int count) |
1227625a SP |
322 | { |
323 | char buf[256]; | |
324 | ||
325 | if (count < 0) | |
326 | return (-1); | |
b45f51d6 | 327 | (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count); |
1227625a SP |
328 | return (rmtcall("ioctl", buf)); |
329 | } | |
330 | ||
331 | static int | |
ddd2ef55 | 332 | rmtcall(const char *cmd, const char *buf) |
1227625a SP |
333 | { |
334 | ||
335 | if (write(rmtape, buf, strlen(buf)) != strlen(buf)) | |
ddd2ef55 | 336 | rmtconnaborted(0); |
1227625a SP |
337 | return (rmtreply(cmd)); |
338 | } | |
339 | ||
340 | static int | |
ddd2ef55 | 341 | rmtreply(const char *cmd) |
1227625a SP |
342 | { |
343 | register char *cp; | |
344 | char code[30], emsg[BUFSIZ]; | |
345 | ||
346 | rmtgets(code, sizeof (code)); | |
347 | if (*code == 'E' || *code == 'F') { | |
348 | rmtgets(emsg, sizeof (emsg)); | |
349 | msg("%s: %s", cmd, emsg); | |
b45f51d6 SP |
350 | errno = atoi(code + 1); |
351 | if (*code == 'F') | |
1227625a | 352 | rmtstate = TS_CLOSED; |
1227625a SP |
353 | return (-1); |
354 | } | |
355 | if (*code != 'A') { | |
356 | /* Kill trailing newline */ | |
357 | cp = code + strlen(code); | |
358 | if (cp > code && *--cp == '\n') | |
359 | *cp = '\0'; | |
360 | ||
361 | msg("Protocol to remote tape server botched (code \"%s\").\n", | |
362 | code); | |
ddd2ef55 | 363 | rmtconnaborted(0); |
1227625a SP |
364 | } |
365 | return (atoi(code + 1)); | |
366 | } | |
367 | ||
ddd2ef55 SP |
368 | static int |
369 | rmtgetb(void) | |
1227625a SP |
370 | { |
371 | char c; | |
372 | ||
373 | if (read(rmtape, &c, 1) != 1) | |
ddd2ef55 | 374 | rmtconnaborted(0); |
1227625a SP |
375 | return (c); |
376 | } | |
377 | ||
378 | /* Get a line (guaranteed to have a trailing newline). */ | |
ddd2ef55 SP |
379 | static void |
380 | rmtgets(char *line, size_t len) | |
1227625a SP |
381 | { |
382 | register char *cp = line; | |
383 | ||
384 | while (len > 1) { | |
385 | *cp = rmtgetb(); | |
386 | if (*cp == '\n') { | |
387 | cp[1] = '\0'; | |
388 | return; | |
389 | } | |
390 | cp++; | |
391 | len--; | |
392 | } | |
393 | *cp = '\0'; | |
394 | msg("Protocol to remote tape server botched.\n"); | |
395 | msg("(rmtgets got \"%s\").\n", line); | |
ddd2ef55 | 396 | rmtconnaborted(0); |
1227625a | 397 | } |