2 * Amanda, The Advanced Maryland Automatic Network Disk Archiver
3 * Copyright (c) 1991-1998, 2000 University of Maryland at College Park
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of U.M. not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission. U.M. makes no representations about the
13 * suitability of this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
16 * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
18 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 * Authors: the Amanda Development Team. Its members are listed in a
24 * file named AUTHORS, in the root directory of this distribution.
27 * $Id: amrecover.c,v 1.7 2006/07/25 18:27:57 martinea Exp $
29 * an interactive program for recovering backed-up files
34 //#ifdef HAVE_NETINET_IN_SYSTM_H
35 //#include <netinet/in_systm.h>
37 //#include <netinet/in.h>
38 //#ifdef HAVE_NETINET_IP_H
39 //#include <netinet/ip.h>
42 #include "amfeatures.h"
43 #include "amrecover.h"
48 extern int process_line(char *line);
49 int guess_disk(char *cwd, size_t cwd_len, char **dn_guess, char **mpt_guess);
51 int grab_reply(int show);
52 void sigint_handler(int signum);
53 int main(int argc, char **argv);
55 #define USAGE "Usage: amoldrecover [[-C] <config>] [-s <index-server>] [-t <tape-server>] [-d <tape-device>]\n"
58 char *server_name = NULL;
60 char *server_line = NULL;
61 char *dump_datestamp = NULL; /* date we are restoring */
62 char *dump_hostname; /* which machine we are restoring */
63 char *disk_name = NULL; /* disk we are restoring */
64 char *mount_point = NULL; /* where disk was mounted */
65 char *disk_path = NULL; /* path relative to mount point */
66 char dump_date[STR_SIZE]; /* date on which we are restoring */
67 int quit_prog; /* set when time to exit parser */
68 char *tape_server_name = NULL;
69 int tape_server_socket;
70 char *tape_device_name = NULL;
71 am_feature_t *our_features = NULL;
72 am_feature_t *indexsrv_features = NULL;
73 am_feature_t *tapesrv_features = NULL;
75 /* gets a "line" from server and put in server_line */
76 /* server_line is terminated with \0, \r\n is striped */
77 /* returns -1 if error */
87 if((part = areads(server_socket)) == NULL) {
88 int save_errno = errno;
91 fputs(server_line, stderr); /* show the last line read */
95 fprintf(stderr, "%s: Error reading line from server: %s\n",
97 strerror(save_errno));
99 fprintf(stderr, "%s: Unexpected end of file, check amindexd*debug on server %s\n",
104 break; /* exit while loop */
107 strappend(line, part);
113 if((len = strlen(line)) > 0 && line[len-1] == '\r') {
115 server_line = newstralloc(server_line, line);
120 * Hmmm. We got a "line" from areads(), which means it saw
121 * a '\n' (or EOF, etc), but there was not a '\r' before it.
122 * Put a '\n' back in the buffer and loop for more.
124 strappend(line, "\n");
132 /* get reply from server and print to screen */
133 /* handle multi-line reply */
134 /* return -1 if error */
135 /* return code returned by server always occupies first 3 bytes of global
136 variable server_line */
142 if (get_line() == -1) {
145 if(show) puts(server_line);
146 } while (server_line[3] == '-');
147 if(show) fflush(stdout);
153 /* get 1 line of reply */
154 /* returns -1 if error, 0 if last (or only) line, 1 if more to follow */
158 if (get_line() == -1)
160 return server_line[3] == '-';
164 /* returns pointer to returned line */
173 /* returns 0 if server returned an error code (ie code starting with 5)
174 and non-zero otherwise */
178 return server_line[0] != '5';
187 * NOTE: this routine is called from sigint_handler, so we must be
188 * **very** careful about what we do since there is no way to know
189 * our state at the time the interrupt happened. For instance,
190 * do not use any stdio or malloc routines here.
195 memset(msg, 0, sizeof(msg));
196 msg[0].iov_base = cmd;
197 msg[0].iov_len = strlen(msg[0].iov_base);
198 msg[1].iov_base = "\r\n";
199 msg[1].iov_len = strlen(msg[1].iov_base);
200 bytes = (ssize_t)(msg[0].iov_len + msg[1].iov_len);
202 if (writev(server_socket, msg, 2) < bytes) {
209 /* send a command to the server, get reply and print to screen */
214 if (send_command(cmd) == -1) return -1;
215 if (grab_reply(1) == -1) return -1;
220 /* same as converse() but reply not echoed to stdout */
225 if (send_command(cmd) == -1) return -1;
226 if (grab_reply(0) == -1) return -1;
231 /* basic interrupt handler for when user presses ^C */
232 /* Bale out, letting server know before doing so */
238 * NOTE: we must be **very** careful about what we do here since there
239 * is no way to know our state at the time the interrupt happened.
240 * For instance, do not use any stdio routines here or in any called
241 * routines. Also, use _exit() instead of exit() to make sure stdio
242 * buffer flushing is not attempted.
244 (void)signum; /* Quiet unused parameter warning */
246 if (extract_restore_child_pid != -1)
247 (void)kill(extract_restore_child_pid, SIGKILL);
248 extract_restore_child_pid = -1;
250 (void)send_command("QUIT");
262 /* remove "/" at end of path */
263 if(length>1 && s[length-1]=='/')
266 /* change "/." to "/" */
267 if(strcmp(s,"/.")==0)
270 /* remove "/." at end of path */
271 if(strcmp(&(s[length-2]),"/.")==0)
276 /* try and guess the disk the user is currently on.
277 Return -1 if error, 0 if disk not local, 1 if disk local,
278 2 if disk local but can't guess name */
279 /* do this by looking for the longest mount point which matches the
288 size_t longest_match = 0;
289 size_t current_length;
292 generic_fsent_t fsent;
294 char *disk_try = NULL;
299 if (getcwd(cwd, cwd_len) == NULL) {
303 cwd_length = strlen(cwd);
304 dbprintf(("guess_disk: %d: \"%s\"\n", cwd_length, cwd));
306 if (open_fstab() == 0) {
311 while (get_fstab_nextentry(&fsent))
313 current_length = fsent.mntdir ? strlen(fsent.mntdir) : (size_t)0;
314 dbprintf(("guess_disk: %d: %d: \"%s\": \"%s\"\n",
317 fsent.mntdir ? fsent.mntdir : "(mntdir null)",
318 fsent.fsname ? fsent.fsname : "(fsname null)"));
319 if ((current_length > longest_match)
320 && (current_length <= cwd_length)
321 && (strncmp(fsent.mntdir, cwd, current_length) == 0))
323 longest_match = current_length;
324 *mpt_guess = newstralloc(*mpt_guess, fsent.mntdir);
325 if(strncmp(fsent.fsname,DEV_PREFIX,(strlen(DEV_PREFIX))))
327 fsname = newstralloc(fsname, fsent.fsname);
331 fsname = newstralloc(fsname,fsent.fsname+strlen(DEV_PREFIX));
333 local_disk = is_local_fstype(&fsent);
334 dbprintf(("guess_disk: local_disk = %d, fsname = \"%s\"\n",
341 if (longest_match == 0) {
344 return -1; /* ? at least / should match */
353 /* have mount point now */
354 /* disk name may be specified by mount point (logical name) or
355 device name, have to determine */
356 printf("Trying disk %s ...\n", *mpt_guess);
357 disk_try = stralloc2("DISK ", *mpt_guess); /* try logical name */
358 if (exchange(disk_try) == -1)
363 *dn_guess = stralloc(*mpt_guess); /* logical is okay */
367 printf("Trying disk %s ...\n", fsname);
368 disk_try = stralloc2("DISK ", fsname); /* try device name */
369 if (exchange(disk_try) == -1)
374 *dn_guess = stralloc(fsname); /* dev name is okay */
379 /* neither is okay */
390 (void)converse("QUIT");
393 char *localhost = NULL;
395 #ifdef DEFAULT_TAPE_SERVER
396 # define DEFAULT_TAPE_SERVER_FAILOVER (DEFAULT_TAPE_SERVER)
398 # define DEFAULT_TAPE_SERVER_FAILOVER (NULL)
410 char *lineread = NULL;
411 struct sigaction act, oact;
414 char cwd[STR_SIZE], *dn_guess = NULL, *mpt_guess = NULL;
421 set_pname("amoldrecover");
423 /* Don't die when child closes pipe */
424 signal(SIGPIPE, SIG_IGN);
426 dbopen(DBG_SUBDIR_CLIENT);
428 #ifndef IGNORE_UID_CHECK
429 if (geteuid() != 0) {
430 erroutput_type |= ERR_SYSLOG;
431 error("amrecover must be run by root");
436 localhost = alloc(MAX_HOSTNAME_LENGTH+1);
437 if (gethostname(localhost, MAX_HOSTNAME_LENGTH) != 0) {
438 error("cannot determine local host name\n");
441 localhost[MAX_HOSTNAME_LENGTH] = '\0';
443 config = newstralloc(config, DEFAULT_CONFIG);
445 dbrename(config, DBG_SUBDIR_CLIENT);
448 server_name = getenv("AMANDA_SERVER");
449 if(!server_name) server_name = DEFAULT_SERVER;
450 server_name = stralloc(server_name);
452 amfree(tape_server_name);
453 tape_server_name = getenv("AMANDA_TAPESERVER");
454 if(!tape_server_name) tape_server_name = DEFAULT_TAPE_SERVER;
455 tape_server_name = stralloc(tape_server_name);
457 if (argc > 1 && argv[1][0] != '-')
460 * If the first argument is not an option flag, then we assume
461 * it is a configuration name to match the syntax of the other
466 new_argv = (char **) alloc((size_t)((argc + 1 + 1) * sizeof(*new_argv)));
467 new_argv[0] = argv[0];
469 for (i = 1; i < argc; i++)
471 new_argv[i + 1] = argv[i];
473 new_argv[i + 1] = NULL;
477 while ((i = getopt(argc, argv, "C:s:t:d:U")) != EOF)
482 config = newstralloc(config, optarg);
486 server_name = newstralloc(server_name, optarg);
490 tape_server_name = newstralloc(tape_server_name, optarg);
494 tape_device_name = newstralloc(tape_device_name, optarg);
505 (void)fprintf(stderr, USAGE);
514 /* Don't die when child closes pipe */
515 signal(SIGPIPE, SIG_IGN);
517 /* set up signal handler */
518 act.sa_handler = sigint_handler;
519 sigemptyset(&act.sa_mask);
521 if (sigaction(SIGINT, &act, &oact) != 0) {
522 error("error setting signal handler: %s", strerror(errno));
526 service_name = stralloc2("amandaidx", SERVICE_SUFFIX);
528 printf("AMRECOVER Version %s. Contacting server on %s ...\n",
529 version(), server_name);
530 if ((sp = getservbyname(service_name, "tcp")) == NULL) {
531 error("%s/tcp unknown protocol", service_name);
534 amfree(service_name);
535 server_socket = stream_client_privileged(server_name,
536 (in_port_t)ntohs((in_port_t)sp->s_port),
541 if (server_socket < 0) {
542 error("cannot connect to %s: %s", server_name, strerror(errno));
545 if (my_port >= IPPORT_RESERVED) {
546 aclose(server_socket);
547 error("did not get a reserved port: %d", my_port);
553 * We may need root privilege again later for a reserved port to
554 * the tape server, so we will drop down now but might have to
561 /* get server's banner */
562 if (grab_reply(1) == -1) {
563 aclose(server_socket);
569 aclose(server_socket);
573 /* do the security thing */
574 line = get_security();
575 if (converse(line) == -1) {
576 aclose(server_socket);
579 if (!server_happy()) {
580 aclose(server_socket);
583 memset(line, '\0', strlen(line));
586 /* try to get the features from the server */
588 char *our_feature_string = NULL;
589 char *their_feature_string = NULL;
591 our_features = am_init_feature_set();
592 our_feature_string = am_feature_to_string(our_features);
593 line = stralloc2("FEATURES ", our_feature_string);
594 if(exchange(line) == 0) {
595 their_feature_string = stralloc(server_line+13);
596 indexsrv_features = am_string_to_feature(their_feature_string);
599 indexsrv_features = am_set_default_feature_set();
601 amfree(our_feature_string);
602 amfree(their_feature_string);
606 /* set the date of extraction to be today */
608 tm = localtime(&timer);
610 strftime(dump_date, sizeof(dump_date), "%Y-%m-%d", tm);
614 printf("Setting restore date to today (%s)\n", dump_date);
615 line = stralloc2("DATE ", dump_date);
616 if (converse(line) == -1) {
617 aclose(server_socket);
622 line = stralloc2("SCNF ", config);
623 if (converse(line) == -1) {
624 aclose(server_socket);
631 /* set host we are restoring to this host by default */
632 amfree(dump_hostname);
636 /* get a starting disk and directory based on where
638 switch (guess_disk(cwd, sizeof(cwd), &dn_guess, &mpt_guess))
641 /* okay, got a guess. Set disk accordingly */
642 printf("$CWD '%s' is on disk '%s' mounted at '%s'.\n",
643 cwd, dn_guess, mpt_guess);
644 set_disk(dn_guess, mpt_guess);
646 if (server_happy() && strcmp(cwd, mpt_guess) != 0)
647 printf("WARNING: not on root of selected filesystem, check man-page!\n");
653 printf("$CWD '%s' is on a network mounted disk\n",
655 printf("so you must 'sethost' to the server\n");
656 /* fake an unhappy server */
657 server_line[0] = '5';
663 printf("Use the setdisk command to choose dump disk to recover\n");
664 /* fake an unhappy server */
665 server_line[0] = '5';
674 if ((lineread = readline("amrecover> ")) == NULL) {
679 if (lineread[0] != '\0')
681 add_history(lineread);
682 process_line(lineread); /* act on line's content */
685 } while (!quit_prog);
689 aclose(server_socket);
696 struct passwd *pwptr;
698 if((pwptr = getpwuid(getuid())) == NULL) {
699 error("can't get login name for my uid %ld", (long)getuid());
702 return stralloc2("SECURITY USER ", pwptr->pw_name);