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
35 #include "amfeatures.h"
36 #include "amrecover.h"
42 extern int process_line(char *line);
43 int guess_disk(char *cwd, size_t cwd_len, char **dn_guess, char **mpt_guess);
45 int grab_reply(int show);
46 void sigint_handler(int signum);
47 int main(int argc, char **argv);
49 #define USAGE "Usage: amoldrecover [[-C] <config>] [-s <index-server>] [-t <tape-server>] [-d <tape-device>]\n"
52 char *server_name = NULL;
54 char *server_line = NULL;
55 char *dump_datestamp = NULL; /* date we are restoring */
56 char *dump_hostname; /* which machine we are restoring */
57 char *disk_name = NULL; /* disk we are restoring */
58 char *mount_point = NULL; /* where disk was mounted */
59 char *disk_path = NULL; /* path relative to mount point */
60 char dump_date[STR_SIZE]; /* date on which we are restoring */
61 int quit_prog; /* set when time to exit parser */
62 char *tape_server_name = NULL;
63 int tape_server_socket;
64 char *tape_device_name = NULL;
65 am_feature_t *our_features = NULL;
66 am_feature_t *indexsrv_features = NULL;
67 am_feature_t *tapesrv_features = NULL;
69 /* gets a "line" from server and put in server_line */
70 /* server_line is terminated with \0, \r\n is striped */
71 /* returns -1 if error */
81 if((part = areads(server_socket)) == NULL) {
82 int save_errno = errno;
85 fputs(server_line, stderr); /* show the last line read */
89 fprintf(stderr, "%s: Error reading line from server: %s\n",
91 strerror(save_errno));
93 fprintf(stderr, "%s: Unexpected end of file, check amindexd*debug on server %s\n",
98 break; /* exit while loop */
101 strappend(line, part);
107 if((len = strlen(line)) > 0 && line[len-1] == '\r') {
109 server_line = newstralloc(server_line, line);
114 * Hmmm. We got a "line" from areads(), which means it saw
115 * a '\n' (or EOF, etc), but there was not a '\r' before it.
116 * Put a '\n' back in the buffer and loop for more.
118 strappend(line, "\n");
126 /* get reply from server and print to screen */
127 /* handle multi-line reply */
128 /* return -1 if error */
129 /* return code returned by server always occupies first 3 bytes of global
130 variable server_line */
136 if (get_line() == -1) {
139 if(show) puts(server_line);
140 } while (server_line[3] == '-');
141 if(show) fflush(stdout);
147 /* get 1 line of reply */
148 /* returns -1 if error, 0 if last (or only) line, 1 if more to follow */
152 if (get_line() == -1)
154 return server_line[3] == '-';
158 /* returns pointer to returned line */
167 /* returns 0 if server returned an error code (ie code starting with 5)
168 and non-zero otherwise */
172 return server_line[0] != '5';
181 * NOTE: this routine is called from sigint_handler, so we must be
182 * **very** careful about what we do since there is no way to know
183 * our state at the time the interrupt happened. For instance,
184 * do not use any stdio or malloc routines here.
189 memset(msg, 0, sizeof(msg));
190 msg[0].iov_base = cmd;
191 msg[0].iov_len = strlen(msg[0].iov_base);
192 msg[1].iov_base = "\r\n";
193 msg[1].iov_len = strlen(msg[1].iov_base);
194 bytes = (ssize_t)(msg[0].iov_len + msg[1].iov_len);
196 if (writev(server_socket, msg, 2) < bytes) {
203 /* send a command to the server, get reply and print to screen */
208 if (send_command(cmd) == -1) return -1;
209 if (grab_reply(1) == -1) return -1;
214 /* same as converse() but reply not echoed to stdout */
219 if (send_command(cmd) == -1) return -1;
220 if (grab_reply(0) == -1) return -1;
225 /* basic interrupt handler for when user presses ^C */
226 /* Bale out, letting server know before doing so */
232 * NOTE: we must be **very** careful about what we do here since there
233 * is no way to know our state at the time the interrupt happened.
234 * For instance, do not use any stdio routines here or in any called
235 * routines. Also, use _exit() instead of exit() to make sure stdio
236 * buffer flushing is not attempted.
238 (void)signum; /* Quiet unused parameter warning */
240 if (extract_restore_child_pid != -1)
241 (void)kill(extract_restore_child_pid, SIGKILL);
242 extract_restore_child_pid = -1;
244 (void)send_command("QUIT");
256 /* remove "/" at end of path */
257 if(length>1 && s[length-1]=='/')
260 /* change "/." to "/" */
261 if(strcmp(s,"/.")==0)
264 /* remove "/." at end of path */
265 if(strcmp(&(s[length-2]),"/.")==0)
270 /* try and guess the disk the user is currently on.
271 Return -1 if error, 0 if disk not local, 1 if disk local,
272 2 if disk local but can't guess name */
273 /* do this by looking for the longest mount point which matches the
282 size_t longest_match = 0;
283 size_t current_length;
286 generic_fsent_t fsent;
288 char *disk_try = NULL;
293 if (getcwd(cwd, cwd_len) == NULL) {
297 cwd_length = strlen(cwd);
298 dbprintf(("guess_disk: " SSIZE_T_FMT ": \"%s\"\n", cwd_length, cwd));
300 if (open_fstab() == 0) {
305 while (get_fstab_nextentry(&fsent))
307 current_length = fsent.mntdir ? strlen(fsent.mntdir) : (size_t)0;
308 dbprintf(("guess_disk: " SSIZE_T_FMT ": " SSIZE_T_FMT": \"%s\": \"%s\"\n",
311 fsent.mntdir ? fsent.mntdir : "(mntdir null)",
312 fsent.fsname ? fsent.fsname : "(fsname null)"));
313 if ((current_length > longest_match)
314 && (current_length <= cwd_length)
315 && (strncmp(fsent.mntdir, cwd, current_length) == 0))
317 longest_match = current_length;
318 *mpt_guess = newstralloc(*mpt_guess, fsent.mntdir);
319 if(strncmp(fsent.fsname,DEV_PREFIX,(strlen(DEV_PREFIX))))
321 fsname = newstralloc(fsname, fsent.fsname);
325 fsname = newstralloc(fsname,fsent.fsname+strlen(DEV_PREFIX));
327 local_disk = is_local_fstype(&fsent);
328 dbprintf(("guess_disk: local_disk = %d, fsname = \"%s\"\n",
335 if (longest_match == 0) {
338 return -1; /* ? at least / should match */
347 /* have mount point now */
348 /* disk name may be specified by mount point (logical name) or
349 device name, have to determine */
350 printf("Trying disk %s ...\n", *mpt_guess);
351 disk_try = stralloc2("DISK ", *mpt_guess); /* try logical name */
352 if (exchange(disk_try) == -1)
357 *dn_guess = stralloc(*mpt_guess); /* logical is okay */
361 printf("Trying disk %s ...\n", fsname);
362 disk_try = stralloc2("DISK ", fsname); /* try device name */
363 if (exchange(disk_try) == -1)
368 *dn_guess = stralloc(fsname); /* dev name is okay */
373 /* neither is okay */
384 (void)converse("QUIT");
387 char *localhost = NULL;
389 #ifdef DEFAULT_TAPE_SERVER
390 # define DEFAULT_TAPE_SERVER_FAILOVER (DEFAULT_TAPE_SERVER)
392 # define DEFAULT_TAPE_SERVER_FAILOVER (NULL)
404 char *lineread = NULL;
405 struct sigaction act, oact;
408 char cwd[STR_SIZE], *dn_guess = NULL, *mpt_guess = NULL;
416 set_pname("amoldrecover");
418 /* Don't die when child closes pipe */
419 signal(SIGPIPE, SIG_IGN);
421 dbopen(DBG_SUBDIR_CLIENT);
423 #ifndef IGNORE_UID_CHECK
424 if (geteuid() != 0) {
425 erroutput_type |= ERR_SYSLOG;
426 error("amrecover must be run by root");
431 localhost = alloc(MAX_HOSTNAME_LENGTH+1);
432 if (gethostname(localhost, MAX_HOSTNAME_LENGTH) != 0) {
433 error("cannot determine local host name\n");
436 localhost[MAX_HOSTNAME_LENGTH] = '\0';
438 config = newstralloc(config, DEFAULT_CONFIG);
440 dbrename(config, DBG_SUBDIR_CLIENT);
443 server_name = getenv("AMANDA_SERVER");
444 if(!server_name) server_name = DEFAULT_SERVER;
445 server_name = stralloc(server_name);
447 amfree(tape_server_name);
448 tape_server_name = getenv("AMANDA_TAPESERVER");
449 if(!tape_server_name) tape_server_name = DEFAULT_TAPE_SERVER;
450 tape_server_name = stralloc(tape_server_name);
452 conffile = vstralloc(CONFIG_DIR, "/", "amanda-client.conf", NULL);
453 if (read_clientconf(conffile) > 0) {
454 error("error reading conffile: %s", conffile);
459 if (argc > 1 && argv[1][0] != '-')
462 * If the first argument is not an option flag, then we assume
463 * it is a configuration name to match the syntax of the other
468 new_argv = (char **) alloc((size_t)((argc + 1 + 1) * sizeof(*new_argv)));
469 new_argv[0] = argv[0];
471 for (i = 1; i < argc; i++)
473 new_argv[i + 1] = argv[i];
475 new_argv[i + 1] = NULL;
479 while ((i = getopt(argc, argv, "C:s:t:d:U")) != EOF)
484 config = newstralloc(config, optarg);
488 server_name = newstralloc(server_name, optarg);
492 tape_server_name = newstralloc(tape_server_name, optarg);
496 tape_device_name = newstralloc(tape_device_name, optarg);
507 (void)fprintf(stderr, USAGE);
516 /* Don't die when child closes pipe */
517 signal(SIGPIPE, SIG_IGN);
519 /* set up signal handler */
520 act.sa_handler = sigint_handler;
521 sigemptyset(&act.sa_mask);
523 if (sigaction(SIGINT, &act, &oact) != 0) {
524 error("error setting signal handler: %s", strerror(errno));
528 service_name = stralloc2("amandaidx", SERVICE_SUFFIX);
530 printf("AMRECOVER Version %s. Contacting server on %s ...\n",
531 version(), server_name);
532 if ((sp = getservbyname(service_name, "tcp")) == NULL) {
533 error("%s/tcp unknown protocol", service_name);
536 amfree(service_name);
537 server_socket = stream_client_privileged(server_name,
538 (in_port_t)ntohs((in_port_t)sp->s_port),
543 if (server_socket < 0) {
544 error("cannot connect to %s: %s", server_name, strerror(errno));
547 if (my_port >= IPPORT_RESERVED) {
548 aclose(server_socket);
549 error("did not get a reserved port: %d", my_port);
555 * We may need root privilege again later for a reserved port to
556 * the tape server, so we will drop down now but might have to
563 /* get server's banner */
564 if (grab_reply(1) == -1) {
565 aclose(server_socket);
571 aclose(server_socket);
575 /* do the security thing */
576 line = get_security();
577 if (converse(line) == -1) {
578 aclose(server_socket);
581 if (!server_happy()) {
582 aclose(server_socket);
585 memset(line, '\0', strlen(line));
588 /* try to get the features from the server */
590 char *our_feature_string = NULL;
591 char *their_feature_string = NULL;
593 our_features = am_init_feature_set();
594 our_feature_string = am_feature_to_string(our_features);
595 line = stralloc2("FEATURES ", our_feature_string);
596 if(exchange(line) == 0) {
597 their_feature_string = stralloc(server_line+13);
598 indexsrv_features = am_string_to_feature(their_feature_string);
601 indexsrv_features = am_set_default_feature_set();
603 amfree(our_feature_string);
604 amfree(their_feature_string);
608 /* set the date of extraction to be today */
610 tm = localtime(&timer);
612 strftime(dump_date, sizeof(dump_date), "%Y-%m-%d", tm);
616 printf("Setting restore date to today (%s)\n", dump_date);
617 line = stralloc2("DATE ", dump_date);
618 if (converse(line) == -1) {
619 aclose(server_socket);
624 line = stralloc2("SCNF ", config);
625 if (converse(line) == -1) {
626 aclose(server_socket);
633 /* set host we are restoring to this host by default */
634 amfree(dump_hostname);
638 /* get a starting disk and directory based on where
640 switch (guess_disk(cwd, sizeof(cwd), &dn_guess, &mpt_guess))
643 /* okay, got a guess. Set disk accordingly */
644 printf("$CWD '%s' is on disk '%s' mounted at '%s'.\n",
645 cwd, dn_guess, mpt_guess);
646 set_disk(dn_guess, mpt_guess);
648 if (server_happy() && strcmp(cwd, mpt_guess) != 0)
649 printf("WARNING: not on root of selected filesystem, check man-page!\n");
655 printf("$CWD '%s' is on a network mounted disk\n",
657 printf("so you must 'sethost' to the server\n");
658 /* fake an unhappy server */
659 server_line[0] = '5';
665 printf("Use the setdisk command to choose dump disk to recover\n");
666 /* fake an unhappy server */
667 server_line[0] = '5';
676 if ((lineread = readline("amrecover> ")) == NULL) {
681 if (lineread[0] != '\0')
683 add_history(lineread);
684 process_line(lineread); /* act on line's content */
687 } while (!quit_prog);
691 aclose(server_socket);
698 struct passwd *pwptr;
700 if((pwptr = getpwuid(getuid())) == NULL) {
701 error("can't get login name for my uid %ld", (long)getuid());
704 return stralloc2("SECURITY USER ", pwptr->pw_name);