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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 | 4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 |
ebcbe7f6 | 5 | * Stelian Pop <pop@cybercable.fr>, 1999-2000 |
1227625a SP |
6 | */ |
7 | ||
8 | /*- | |
9 | * Copyright (c) 1980, 1993 | |
10 | * The Regents of the University of California. All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. All advertising materials mentioning features or use of this software | |
21 | * must display the following acknowledgement: | |
22 | * This product includes software developed by the University of | |
23 | * California, Berkeley and its contributors. | |
24 | * 4. Neither the name of the University nor the names of its contributors | |
25 | * may be used to endorse or promote products derived from this software | |
26 | * without specific prior written permission. | |
27 | * | |
28 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
38 | * SUCH DAMAGE. | |
39 | */ | |
40 | ||
41 | #ifndef lint | |
b45f51d6 | 42 | static const char rcsid[] = |
ebcbe7f6 | 43 | "$Id: dumprmt.c,v 1.11 2000/01/21 10:17:41 stelian Exp $"; |
1227625a SP |
44 | #endif /* not lint */ |
45 | ||
b45f51d6 SP |
46 | #ifdef __linux__ |
47 | #include <sys/types.h> | |
48 | #include <linux/types.h> | |
49 | #endif | |
1227625a SP |
50 | #include <sys/param.h> |
51 | #include <sys/mtio.h> | |
1227625a SP |
52 | #include <sys/socket.h> |
53 | #include <sys/time.h> | |
54 | #ifdef __linux__ | |
55 | #include <linux/ext2_fs.h> | |
56 | #include <bsdcompat.h> | |
b45f51d6 | 57 | #include <signal.h> |
1227625a SP |
58 | #else |
59 | #ifdef sunos | |
60 | #include <sys/vnode.h> | |
61 | ||
62 | #include <ufs/inode.h> | |
63 | #else | |
64 | #include <ufs/ufs/dinode.h> | |
65 | #endif | |
66 | #endif | |
67 | ||
68 | #include <netinet/in.h> | |
b45f51d6 SP |
69 | #include <netinet/in_systm.h> |
70 | #include <netinet/ip.h> | |
1227625a SP |
71 | #include <netinet/tcp.h> |
72 | ||
73 | #include <protocols/dumprestore.h> | |
74 | ||
75 | #include <ctype.h> | |
ddd2ef55 SP |
76 | #include <errno.h> |
77 | #include <compaterr.h> | |
1227625a SP |
78 | #include <netdb.h> |
79 | #include <pwd.h> | |
1227625a SP |
80 | #include <stdio.h> |
81 | #ifdef __STDC__ | |
82 | #include <stdlib.h> | |
83 | #include <string.h> | |
84 | #include <unistd.h> | |
85 | #endif | |
86 | ||
87 | #ifdef __linux__ | |
88 | #include <ext2fs/ext2fs.h> | |
89 | #endif | |
90 | ||
91 | #include "pathnames.h" | |
92 | #include "dump.h" | |
93 | ||
94 | #define TS_CLOSED 0 | |
95 | #define TS_OPEN 1 | |
96 | ||
97 | static int rmtstate = TS_CLOSED; | |
0c62667d SP |
98 | static int tormtape = -1; |
99 | static int fromrmtape = -1; | |
f34aca37 | 100 | int rshpid = -1; |
ddd2ef55 | 101 | static const char *rmtpeer = 0; |
1227625a | 102 | |
ddd2ef55 SP |
103 | static int okname __P((const char *)); |
104 | static int rmtcall __P((const char *, const char *)); | |
105 | static void rmtconnaborted __P((int)); | |
1227625a | 106 | static int rmtgetb __P((void)); |
0c62667d | 107 | static int rmtgetconn __P((void)); |
ddd2ef55 SP |
108 | static void rmtgets __P((char *, size_t)); |
109 | static int rmtreply __P((const char *)); | |
0c62667d | 110 | static int piped_child __P((const char **command)); |
b45f51d6 SP |
111 | #ifdef KERBEROS |
112 | int krcmd __P((char **, int /*u_short*/, char *, char *, int *, char *)); | |
113 | #endif | |
1227625a | 114 | |
b45f51d6 SP |
115 | static int errfd = -1; |
116 | extern int dokerberos; | |
1227625a | 117 | extern int ntrec; /* blocking factor on tape */ |
ddd2ef55 SP |
118 | #ifndef errno |
119 | extern int errno; | |
120 | #endif | |
1227625a SP |
121 | |
122 | int | |
ddd2ef55 | 123 | rmthost(const char *host) |
1227625a | 124 | { |
1227625a | 125 | if (rmtpeer) |
ddd2ef55 SP |
126 | free((void *)rmtpeer); |
127 | if ((rmtpeer = strdup(host)) == NULL) | |
1227625a SP |
128 | rmtpeer = host; |
129 | signal(SIGPIPE, rmtconnaborted); | |
0c62667d | 130 | return rmtgetconn(); |
1227625a SP |
131 | } |
132 | ||
133 | static void | |
ddd2ef55 | 134 | rmtconnaborted(int signo) |
1227625a | 135 | { |
b45f51d6 SP |
136 | msg("Lost connection to remote host.\n"); |
137 | if (errfd != -1) { | |
138 | fd_set r; | |
139 | struct timeval t; | |
140 | ||
141 | FD_ZERO(&r); | |
142 | FD_SET(errfd, &r); | |
143 | t.tv_sec = 0; | |
144 | t.tv_usec = 0; | |
145 | if (select(errfd + 1, &r, NULL, NULL, &t)) { | |
146 | int i; | |
147 | char buf[2048]; | |
148 | ||
149 | if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) { | |
150 | buf[i] = '\0'; | |
151 | msg("on %s: %s%s", rmtpeer, buf, | |
152 | buf[i - 1] == '\n' ? "" : "\n"); | |
153 | } | |
154 | } | |
155 | } | |
1227625a | 156 | |
b45f51d6 | 157 | exit(X_ABORT); |
1227625a SP |
158 | } |
159 | ||
0c62667d | 160 | static int |
ddd2ef55 | 161 | rmtgetconn(void) |
1227625a SP |
162 | { |
163 | register char *cp; | |
b45f51d6 | 164 | register const char *rmt; |
1227625a SP |
165 | static struct servent *sp = NULL; |
166 | static struct passwd *pwd = NULL; | |
ddd2ef55 | 167 | const char *tuser; |
0c62667d | 168 | const char *rsh; |
1227625a | 169 | int size; |
b45f51d6 SP |
170 | int throughput; |
171 | int on; | |
8d957ae7 | 172 | char *rmtpeercopy; |
1227625a | 173 | |
0c62667d SP |
174 | rsh = getenv("RSH"); |
175 | ||
176 | if (!rsh && sp == NULL) { | |
b45f51d6 | 177 | sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp"); |
ddd2ef55 SP |
178 | if (sp == NULL) |
179 | errx(1, "%s/tcp: unknown service", | |
b45f51d6 | 180 | dokerberos ? "kshell" : "shell"); |
0c62667d SP |
181 | } |
182 | if (pwd == NULL) { | |
1227625a | 183 | pwd = getpwuid(getuid()); |
ddd2ef55 SP |
184 | if (pwd == NULL) |
185 | errx(1, "who are you?"); | |
1227625a SP |
186 | } |
187 | if ((cp = strchr(rmtpeer, '@')) != NULL) { | |
188 | tuser = rmtpeer; | |
189 | *cp = '\0'; | |
190 | if (!okname(tuser)) | |
b45f51d6 | 191 | exit(X_STARTUP); |
1227625a SP |
192 | rmtpeer = ++cp; |
193 | } else | |
194 | tuser = pwd->pw_name; | |
b45f51d6 SP |
195 | if ((rmt = getenv("RMT")) == NULL) |
196 | rmt = _PATH_RMT; | |
197 | msg(""); | |
0c62667d SP |
198 | |
199 | if (rsh) { | |
200 | const char *rshcmd[6]; | |
201 | rshcmd[0] = rsh; | |
202 | rshcmd[1] = rmtpeer; | |
203 | rshcmd[2] = "-l"; | |
204 | rshcmd[3] = tuser; | |
205 | rshcmd[4] = rmt; | |
206 | rshcmd[5] = NULL; | |
207 | ||
f34aca37 | 208 | if ((rshpid = piped_child(rshcmd)) < 0) { |
0c62667d SP |
209 | msg("cannot open connection\n"); |
210 | return 0; | |
211 | } | |
212 | } | |
213 | else { | |
8d957ae7 SP |
214 | /* Copy rmtpeer to rmtpeercopy to ignore the |
215 | return value from rcmd. I cannot figure if | |
216 | this is this a bug in rcmd or in my code... */ | |
217 | rmtpeercopy = (char *)rmtpeer; | |
b45f51d6 | 218 | #ifdef KERBEROS |
0c62667d | 219 | if (dokerberos) |
8d957ae7 | 220 | tormtape = krcmd(&rmtpeercopy, sp->s_port, tuser, rmt, &errfd, |
0c62667d SP |
221 | (char *)0); |
222 | else | |
b45f51d6 | 223 | #endif |
8d957ae7 | 224 | tormtape = rcmd(&rmtpeercopy, (u_short)sp->s_port, pwd->pw_name, |
0c62667d SP |
225 | tuser, rmt, &errfd); |
226 | if (tormtape < 0) { | |
227 | msg("login to %s as %s failed.\n", rmtpeer, tuser); | |
228 | return 0; | |
229 | } | |
230 | size = ntrec * TP_BSIZE; | |
231 | if (size > 60 * 1024) /* XXX */ | |
232 | size = 60 * 1024; | |
233 | /* Leave some space for rmt request/response protocol */ | |
234 | size += 2 * 1024; | |
235 | while (size > TP_BSIZE && | |
236 | setsockopt(tormtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0) | |
237 | size -= TP_BSIZE; | |
238 | (void)setsockopt(tormtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size)); | |
239 | throughput = IPTOS_THROUGHPUT; | |
240 | if (setsockopt(tormtape, IPPROTO_IP, IP_TOS, | |
241 | &throughput, sizeof(throughput)) < 0) | |
242 | perror("IP_TOS:IPTOS_THROUGHPUT setsockopt"); | |
243 | on = 1; | |
244 | if (setsockopt(tormtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0) | |
245 | perror("TCP_NODELAY setsockopt"); | |
246 | fromrmtape = tormtape; | |
b45f51d6 SP |
247 | } |
248 | (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer); | |
0c62667d | 249 | return 1; |
1227625a SP |
250 | } |
251 | ||
252 | static int | |
ddd2ef55 | 253 | okname(const char *cp0) |
1227625a | 254 | { |
ddd2ef55 | 255 | register const char *cp; |
1227625a SP |
256 | register int c; |
257 | ||
258 | for (cp = cp0; *cp; cp++) { | |
259 | c = *cp; | |
260 | if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) { | |
ddd2ef55 | 261 | warnx("invalid user name %s\n", cp0); |
1227625a SP |
262 | return (0); |
263 | } | |
264 | } | |
265 | return (1); | |
266 | } | |
267 | ||
268 | int | |
ddd2ef55 | 269 | rmtopen(const char *tape, int mode) |
1227625a | 270 | { |
ddd2ef55 | 271 | char buf[MAXPATHLEN]; |
1227625a | 272 | |
ddd2ef55 | 273 | (void)snprintf(buf, sizeof (buf), "O%s\n%d\n", tape, mode); |
1227625a SP |
274 | rmtstate = TS_OPEN; |
275 | return (rmtcall(tape, buf)); | |
276 | } | |
277 | ||
278 | void | |
ddd2ef55 | 279 | rmtclose(void) |
1227625a SP |
280 | { |
281 | ||
282 | if (rmtstate != TS_OPEN) | |
283 | return; | |
284 | rmtcall("close", "C\n"); | |
285 | rmtstate = TS_CLOSED; | |
286 | } | |
287 | ||
288 | int | |
ddd2ef55 | 289 | rmtread(char *buf, size_t count) |
1227625a SP |
290 | { |
291 | char line[30]; | |
ddd2ef55 SP |
292 | int n, i; |
293 | ssize_t cc; | |
1227625a | 294 | |
ddd2ef55 | 295 | (void)snprintf(line, sizeof (line), "R%u\n", (unsigned)count); |
1227625a | 296 | n = rmtcall("read", line); |
b45f51d6 SP |
297 | if (n < 0) |
298 | /* rmtcall() properly sets errno for us on errors. */ | |
299 | return (n); | |
1227625a | 300 | for (i = 0; i < n; i += cc) { |
0c62667d | 301 | cc = read(fromrmtape, buf+i, n - i); |
b45f51d6 | 302 | if (cc <= 0) |
ddd2ef55 | 303 | rmtconnaborted(0); |
1227625a SP |
304 | } |
305 | return (n); | |
306 | } | |
307 | ||
308 | int | |
ddd2ef55 | 309 | rmtwrite(const char *buf, size_t count) |
1227625a SP |
310 | { |
311 | char line[30]; | |
312 | ||
b45f51d6 | 313 | (void)snprintf(line, sizeof (line), "W%d\n", count); |
0c62667d SP |
314 | write(tormtape, line, strlen(line)); |
315 | write(tormtape, buf, count); | |
1227625a SP |
316 | return (rmtreply("write")); |
317 | } | |
318 | ||
1227625a | 319 | int |
ddd2ef55 | 320 | rmtseek(int offset, int pos) |
1227625a SP |
321 | { |
322 | char line[80]; | |
323 | ||
b45f51d6 | 324 | (void)snprintf(line, sizeof (line), "L%d\n%d\n", offset, pos); |
1227625a SP |
325 | return (rmtcall("seek", line)); |
326 | } | |
327 | ||
328 | struct mtget mts; | |
329 | ||
330 | struct mtget * | |
ddd2ef55 | 331 | rmtstatus(void) |
1227625a SP |
332 | { |
333 | register int i; | |
334 | register char *cp; | |
335 | ||
336 | if (rmtstate != TS_OPEN) | |
337 | return (NULL); | |
338 | rmtcall("status", "S\n"); | |
339 | for (i = 0, cp = (char *)&mts; i < sizeof(mts); i++) | |
340 | *cp++ = rmtgetb(); | |
341 | return (&mts); | |
342 | } | |
343 | ||
344 | int | |
ddd2ef55 | 345 | rmtioctl(int cmd, int count) |
1227625a SP |
346 | { |
347 | char buf[256]; | |
348 | ||
349 | if (count < 0) | |
350 | return (-1); | |
b45f51d6 | 351 | (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count); |
1227625a SP |
352 | return (rmtcall("ioctl", buf)); |
353 | } | |
354 | ||
355 | static int | |
ddd2ef55 | 356 | rmtcall(const char *cmd, const char *buf) |
1227625a SP |
357 | { |
358 | ||
0c62667d | 359 | if (write(tormtape, buf, strlen(buf)) != strlen(buf)) |
ddd2ef55 | 360 | rmtconnaborted(0); |
1227625a SP |
361 | return (rmtreply(cmd)); |
362 | } | |
363 | ||
364 | static int | |
ddd2ef55 | 365 | rmtreply(const char *cmd) |
1227625a SP |
366 | { |
367 | register char *cp; | |
368 | char code[30], emsg[BUFSIZ]; | |
369 | ||
370 | rmtgets(code, sizeof (code)); | |
371 | if (*code == 'E' || *code == 'F') { | |
372 | rmtgets(emsg, sizeof (emsg)); | |
373 | msg("%s: %s", cmd, emsg); | |
b45f51d6 SP |
374 | errno = atoi(code + 1); |
375 | if (*code == 'F') | |
1227625a | 376 | rmtstate = TS_CLOSED; |
1227625a SP |
377 | return (-1); |
378 | } | |
379 | if (*code != 'A') { | |
380 | /* Kill trailing newline */ | |
381 | cp = code + strlen(code); | |
382 | if (cp > code && *--cp == '\n') | |
383 | *cp = '\0'; | |
384 | ||
385 | msg("Protocol to remote tape server botched (code \"%s\").\n", | |
386 | code); | |
ddd2ef55 | 387 | rmtconnaborted(0); |
1227625a SP |
388 | } |
389 | return (atoi(code + 1)); | |
390 | } | |
391 | ||
ddd2ef55 SP |
392 | static int |
393 | rmtgetb(void) | |
1227625a SP |
394 | { |
395 | char c; | |
396 | ||
0c62667d | 397 | if (read(fromrmtape, &c, 1) != 1) |
ddd2ef55 | 398 | rmtconnaborted(0); |
1227625a SP |
399 | return (c); |
400 | } | |
401 | ||
402 | /* Get a line (guaranteed to have a trailing newline). */ | |
ddd2ef55 SP |
403 | static void |
404 | rmtgets(char *line, size_t len) | |
1227625a SP |
405 | { |
406 | register char *cp = line; | |
407 | ||
408 | while (len > 1) { | |
409 | *cp = rmtgetb(); | |
410 | if (*cp == '\n') { | |
411 | cp[1] = '\0'; | |
412 | return; | |
413 | } | |
414 | cp++; | |
415 | len--; | |
416 | } | |
417 | *cp = '\0'; | |
418 | msg("Protocol to remote tape server botched.\n"); | |
419 | msg("(rmtgets got \"%s\").\n", line); | |
ddd2ef55 | 420 | rmtconnaborted(0); |
1227625a | 421 | } |
0c62667d SP |
422 | |
423 | int piped_child(const char **command) { | |
424 | int pid; | |
425 | int to_child_pipe[2]; | |
426 | int from_child_pipe[2]; | |
427 | ||
428 | if (pipe (to_child_pipe) < 0) { | |
429 | msg ("cannot create pipe: %s\n", strerror(errno)); | |
430 | return -1; | |
431 | } | |
432 | if (pipe (from_child_pipe) < 0) { | |
433 | msg ("cannot create pipe: %s\n", strerror(errno)); | |
434 | return -1; | |
435 | } | |
436 | pid = fork (); | |
437 | if (pid < 0) { | |
438 | msg ("cannot fork: %s\n", strerror(errno)); | |
439 | return -1; | |
440 | } | |
441 | if (pid == 0) { | |
442 | if (dup2 (to_child_pipe[0], STDIN_FILENO) < 0) { | |
443 | msg ("cannot dup2 pipe: %s\n", strerror(errno)); | |
444 | exit(1); | |
445 | } | |
446 | if (close (to_child_pipe[1]) < 0) { | |
447 | msg ("cannot close pipe: %s\n", strerror(errno)); | |
448 | exit(1); | |
449 | } | |
450 | if (close (from_child_pipe[0]) < 0) { | |
451 | msg ("cannot close pipe: %s\n", strerror(errno)); | |
452 | exit(1); | |
453 | } | |
454 | if (dup2 (from_child_pipe[1], STDOUT_FILENO) < 0) { | |
455 | msg ("cannot dup2 pipe: %s\n", strerror(errno)); | |
456 | exit(1); | |
457 | } | |
b80c25f8 | 458 | setpgid(0, getpid()); |
0c62667d SP |
459 | execvp (command[0], (char *const *) command); |
460 | msg("cannot exec %s: %s\n", command[0], strerror(errno)); | |
461 | exit(1); | |
462 | } | |
463 | if (close (to_child_pipe[0]) < 0) { | |
464 | msg ("cannot close pipe: %s\n", strerror(errno)); | |
465 | return -1; | |
466 | } | |
467 | if (close (from_child_pipe[1]) < 0) { | |
468 | msg ("cannot close pipe: %s\n", strerror(errno)); | |
469 | return -1; | |
470 | } | |
471 | tormtape = to_child_pipe[1]; | |
472 | fromrmtape = from_child_pipe[0]; | |
473 | return pid; | |
474 | } |