2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <card@Linux.EU.Org>, 1994-1997
5 * Stelian Pop <stelian@popies.net>, 1999-2000
6 * Stelian Pop <stelian@popies.net> - AlcĂ´ve <www.alcove.com>, 2000-2002
10 * Copyright (c) 1980, 1993
11 * The Regents of the University of California. All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 static const char rcsid[] =
40 "$Id: dumprmt.c,v 1.27 2003/03/30 15:40:33 stelian Exp $";
44 #include <sys/param.h>
46 #include <sys/socket.h>
50 #include <sys/types.h>
51 #ifdef HAVE_EXT2FS_EXT2_FS_H
52 #include <ext2fs/ext2_fs.h>
54 #include <linux/ext2_fs.h>
56 #include <bsdcompat.h>
59 #include <sys/vnode.h>
61 #include <ufs/inode.h>
63 #include <ufs/ufs/dinode.h>
66 #include <netinet/in.h>
67 #include <netinet/in_systm.h>
68 #include <netinet/ip.h>
69 #include <netinet/tcp.h>
71 #include <protocols/dumprestore.h>
75 #include <compaterr.h>
87 #include <ext2fs/ext2fs.h>
90 #include <pathnames.h>
91 #include "dump.h" /* for X_STARTUP, X_ABORT etc */
96 static int rmtstate = TS_CLOSED;
97 static int tormtape = -1;
98 static int fromrmtape = -1;
100 static const char *rmtpeer = 0;
102 static int okname __P((const char *));
103 static OFF_T rmtcall __P((const char *, const char *));
104 static void rmtconnaborted __P((int));
105 static int rmtgetb __P((void));
106 static int rmtgetconn __P((void));
107 static void rmtgets __P((char *, size_t));
108 static OFF_T rmtreply __P((const char *));
109 static int piped_child __P((const char **command));
111 int krcmd __P((char **, int /*u_short*/, char *, char *, int *, char *));
114 static int errfd = -1;
115 extern int dokerberos;
116 extern int ntrec; /* blocking factor on tape */
122 rmthost(const char *host)
125 free((void *)rmtpeer);
126 if ((rmtpeer = strdup(host)) == NULL)
128 signal(SIGPIPE, rmtconnaborted);
133 rmtconnaborted(UNUSED(int signo))
135 msg("Lost connection to remote host.\n");
144 if (select(errfd + 1, &r, NULL, NULL, &t)) {
148 if ((i = read(errfd, buf, sizeof(buf) - 1)) > 0) {
150 msg("on %s: %s%s", rmtpeer, buf,
151 buf[i - 1] == '\n' ? "" : "\n");
164 static struct servent *sp = NULL;
165 static struct passwd *pwd = NULL;
175 if (!rsh && sp == NULL) {
176 sp = getservbyname(dokerberos ? "kshell" : "shell", "tcp");
178 errx(1, "%s/tcp: unknown service",
179 dokerberos ? "kshell" : "shell");
182 pwd = getpwuid(getuid());
184 errx(1, "who are you?");
186 if ((cp = strchr(rmtpeer, '@')) != NULL) {
193 tuser = pwd->pw_name;
194 if ((rmt = getenv("RMT")) == NULL)
199 const char *rshcmd[6];
207 /* Restore the uid and gid. We really don't want
208 * to execute whatever is put into RSH variable with
209 * more priviledges than needed... */
213 if ((rshpid = piped_child(rshcmd)) < 0) {
214 msg("cannot open connection\n");
219 /* Copy rmtpeer to rmtpeercopy to ignore the
220 return value from rcmd. I cannot figure if
221 this is this a bug in rcmd or in my code... */
222 rmtpeercopy = (char *)rmtpeer;
225 tormtape = krcmd(&rmtpeercopy, sp->s_port, tuser, rmt, &errfd,
229 tormtape = rcmd(&rmtpeercopy, (u_short)sp->s_port, pwd->pw_name,
232 msg("login to %s as %s failed.\n", rmtpeer, tuser);
235 size = ntrec * TP_BSIZE;
236 if (size > 60 * 1024) /* XXX */
238 /* Leave some space for rmt request/response protocol */
240 while (size > TP_BSIZE &&
241 setsockopt(tormtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
243 (void)setsockopt(tormtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
244 throughput = IPTOS_THROUGHPUT;
245 if (setsockopt(tormtape, IPPROTO_IP, IP_TOS,
246 &throughput, sizeof(throughput)) < 0)
247 perror("IP_TOS:IPTOS_THROUGHPUT setsockopt");
249 if (setsockopt(tormtape, IPPROTO_TCP, TCP_NODELAY, &on, sizeof (on)) < 0)
250 perror("TCP_NODELAY setsockopt");
251 fromrmtape = tormtape;
253 (void)fprintf(stderr, "Connection to %s established.\n", rmtpeer);
258 okname(const char *cp0)
263 for (cp = cp0; *cp; cp++) {
265 if (!isascii(c) || !(isalnum(c) || c == '_' || c == '-')) {
266 warnx("invalid user name %s\n", cp0);
274 rmtopen(const char *tape, const int mode)
276 char buf[MAXPATHLEN];
279 rmtflags = rmtflags_tochar(mode);
280 (void)snprintf(buf, sizeof (buf), "O%s\n%d %s\n",
286 return (rmtcall(tape, buf));
293 if (rmtstate != TS_OPEN)
295 rmtcall("close", "C\n");
296 rmtstate = TS_CLOSED;
300 rmtread(char *buf, size_t count)
306 (void)snprintf(line, sizeof (line), "R%u\n", (unsigned)count);
307 n = rmtcall("read", line);
309 /* rmtcall() properly sets errno for us on errors. */
311 for (i = 0; i < n; i += cc) {
312 cc = read(fromrmtape, buf+i, n - i);
320 rmtwrite(const char *buf, size_t count)
324 (void)snprintf(line, sizeof (line), "W%ld\n", (long)count);
325 write(tormtape, line, strlen(line));
326 write(tormtape, buf, count);
327 return (rmtreply("write"));
331 rmtseek(OFF_T offset, int pos)
335 (void)snprintf(line, sizeof (line), "L%lld\n%d\n", (long long)offset, pos);
336 return (rmtcall("seek", line));
347 if (rmtstate != TS_OPEN)
349 i = rmtcall("status", "S");
350 if (i < 0) return NULL;
351 if (i != (int)sizeof(mts)) {
352 msg("mtget sizes different between host (%d) "
353 "and remote tape (%d)", sizeof(mts), i);
354 for ( /* empty */; i > 0; --i)
358 for (i = 0, cp = (char *)&mts; i < (int)sizeof(mts); i++)
364 rmtioctl(int cmd, int count)
370 (void)snprintf(buf, sizeof (buf), "I%d\n%d\n", cmd, count);
371 return (rmtcall("ioctl", buf));
375 rmtcall(const char *cmd, const char *buf)
378 if (write(tormtape, buf, strlen(buf)) != (ssize_t)strlen(buf))
380 return (rmtreply(cmd));
384 rmtreply(const char *cmd)
387 char code[30], emsg[BUFSIZ];
389 rmtgets(code, sizeof (code));
390 if (*code == 'E' || *code == 'F') {
391 rmtgets(emsg, sizeof (emsg));
392 msg("%s: %s", cmd, emsg);
393 errno = atoi(code + 1);
395 rmtstate = TS_CLOSED;
399 /* Kill trailing newline */
400 cp = code + strlen(code);
401 if (cp > code && *--cp == '\n')
404 msg("Protocol to remote tape server botched (code \"%s\").\n",
408 return (OFF_T)(atoll(code + 1));
416 if (read(fromrmtape, &c, 1) != 1)
421 /* Get a line (guaranteed to have a trailing newline). */
423 rmtgets(char *line, size_t len)
437 msg("Protocol to remote tape server botched.\n");
438 msg("(rmtgets got \"%s\").\n", line);
442 int piped_child(const char **command) {
444 int to_child_pipe[2];
445 int from_child_pipe[2];
447 if (pipe (to_child_pipe) < 0) {
448 msg ("cannot create pipe: %s\n", strerror(errno));
451 if (pipe (from_child_pipe) < 0) {
452 msg ("cannot create pipe: %s\n", strerror(errno));
457 msg ("cannot fork: %s\n", strerror(errno));
461 if (dup2 (to_child_pipe[0], STDIN_FILENO) < 0) {
462 msg ("cannot dup2 pipe: %s\n", strerror(errno));
465 if (close (to_child_pipe[1]) < 0) {
466 msg ("cannot close pipe: %s\n", strerror(errno));
469 if (close (from_child_pipe[0]) < 0) {
470 msg ("cannot close pipe: %s\n", strerror(errno));
473 if (dup2 (from_child_pipe[1], STDOUT_FILENO) < 0) {
474 msg ("cannot dup2 pipe: %s\n", strerror(errno));
477 setpgid(0, getpid());
478 execvp (command[0], (char *const *) command);
479 msg("cannot exec %s: %s\n", command[0], strerror(errno));
482 if (close (to_child_pipe[0]) < 0) {
483 msg ("cannot close pipe: %s\n", strerror(errno));
486 if (close (from_child_pipe[1]) < 0) {
487 msg ("cannot close pipe: %s\n", strerror(errno));
490 tormtape = to_child_pipe[1];
491 fromrmtape = from_child_pipe[0];