2 * This file handles accepting Director Commands
4 * Most Director commands are handled here, with the
5 * exception of the Job command command and subsequent
6 * subcommands that are handled
9 * N.B. in this file, in general we must use P(dev->mutex) rather
10 * than lock_device(dev) so that we can examine the blocked
11 * state rather than blocking ourselves. In some "safe" cases,
12 * we can do things to a blocked device. CAREFUL!!!!
14 * File daemon commands are handled in fdcmd.c
16 * Kern Sibbald, May MMI
22 Copyright (C) 2000-2003 Kern Sibbald and John Walker
24 This program is free software; you can redistribute it and/or
25 modify it under the terms of the GNU General Public License as
26 published by the Free Software Foundation; either version 2 of
27 the License, or (at your option) any later version.
29 This program is distributed in the hope that it will be useful,
30 but WITHOUT ANY WARRANTY; without even the implied warranty of
31 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 General Public License for more details.
34 You should have received a copy of the GNU General Public
35 License along with this program; if not, write to the Free
36 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
44 /* Exported variables */
46 /* Imported variables */
47 extern BSOCK *filed_chan;
48 extern int r_first, r_last;
49 extern struct s_res resources[];
50 extern char my_name[];
51 extern time_t daemon_start_time;
52 extern struct s_last_job last_job;
54 /* Static variables */
55 static char derrmsg[] = "3900 Invalid command\n";
56 static char OKsetdebug[] = "3000 OK setdebug=%d\n";
59 /* Imported functions */
60 extern void terminate_child();
61 extern int job_cmd(JCR *jcr);
62 extern int status_cmd(JCR *sjcr);
64 /* Forward referenced functions */
65 static int label_cmd(JCR *jcr);
66 static int relabel_cmd(JCR *jcr);
67 static int release_cmd(JCR *jcr);
68 static int setdebug_cmd(JCR *jcr);
69 static int cancel_cmd(JCR *cjcr);
70 static int mount_cmd(JCR *jcr);
71 static int unmount_cmd(JCR *jcr);
72 static int autochanger_cmd(JCR *sjcr);
73 static int do_label(JCR *jcr, int relabel);
74 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
75 char *newname, char *poolname,
76 int Slot, int relabel);
80 int (*func)(JCR *jcr);
84 * The following are the recognized commands from the Director.
86 static struct s_cmds cmds[] = {
87 {"JobId=", job_cmd}, /* start Job */
88 {"setdebug=", setdebug_cmd}, /* set debug level */
89 {"cancel", cancel_cmd},
90 {"label", label_cmd}, /* label a tape */
91 {"relabel", relabel_cmd}, /* relabel a tape */
93 {"unmount", unmount_cmd},
94 {"status", status_cmd},
95 {"autochanger", autochanger_cmd},
96 {"release", release_cmd},
97 {NULL, NULL} /* list terminator */
102 * Connection request. We accept connections either from the
103 * Director or a Client (File daemon).
105 * Note, we are running as a seperate thread of the Storage daemon.
106 * and it is because a Director has made a connection with
107 * us on the "Message" channel.
109 * Basic tasks done here:
110 * - Create a JCR record
111 * - If it was from the FD, call handle_filed_connection()
112 * - Authenticate the Director
113 * - We wait for a command
114 * - We execute the command
115 * - We continue or exit depending on the return status
117 void *connection_request(void *arg)
119 BSOCK *bs = (BSOCK *)arg;
123 char name[MAX_NAME_LENGTH];
125 if (bnet_recv(bs) <= 0) {
126 Emsg0(M_ERROR, 0, _("Connection request failed.\n"));
131 * Do a sanity check on the message received
133 if (bs->msglen < 25 || bs->msglen > (int)sizeof(name)-25) {
134 Emsg1(M_ERROR, 0, _("Invalid Dir connection. Len=%d\n"), bs->msglen);
137 * See if this is a File daemon connection. If so
140 if (sscanf(bs->msg, "Hello Start Job %127s calling\n", name) == 1) {
141 handle_filed_connection(bs, name);
145 jcr = new_jcr(sizeof(JCR), stored_free_jcr); /* create Job Control Record */
146 jcr->dir_bsock = bs; /* save Director bsock */
147 jcr->dir_bsock->jcr = jcr;
149 Dmsg0(1000, "stored in start_job\n");
152 * Authenticate the Director
154 if (!authenticate_director(jcr)) {
155 Jmsg(jcr, M_FATAL, 0, _("Unable to authenticate Director\n"));
159 Dmsg0(90, "Message channel init completed.\n");
161 for (quit=0; !quit;) {
163 if ((bnet_stat = bnet_recv(bs)) <= 0) {
164 break; /* connection terminated */
166 Dmsg1(9, "<dird: %s\n", bs->msg);
168 for (i=0; cmds[i].cmd; i++) {
169 if (strncmp(cmds[i].cmd, bs->msg, strlen(cmds[i].cmd)) == 0) {
170 if (!cmds[i].func(jcr)) { /* do command */
171 quit = TRUE; /* error, get out */
172 Dmsg1(90, "Command %s requsts quit\n", cmds[i].cmd);
174 found = TRUE; /* indicate command found */
178 if (!found) { /* command not found */
179 bnet_fsend(bs, derrmsg);
184 bnet_sig(bs, BNET_TERMINATE);
190 * Set debug level as requested by the Director
193 static int setdebug_cmd(JCR *jcr)
195 BSOCK *dir = jcr->dir_bsock;
198 Dmsg1(10, "setdebug_cmd: %s", dir->msg);
199 if (sscanf(dir->msg, "setdebug=%d", &level) != 1 || level < 0) {
200 bnet_fsend(dir, "3991 Bad setdebug command: %s\n", dir->msg);
204 return bnet_fsend(dir, OKsetdebug, level);
211 static int cancel_cmd(JCR *cjcr)
213 BSOCK *dir = cjcr->dir_bsock;
215 char Job[MAX_NAME_LENGTH];
218 if (sscanf(dir->msg, "cancel Job=%127s", Job) == 1) {
219 if (!(jcr=get_jcr_by_full_name(Job))) {
220 bnet_fsend(dir, _("3992 Job %s not found.\n"), Job);
223 oldStatus = jcr->JobStatus;
224 set_jcr_job_status(jcr, JS_Canceled);
225 if (!jcr->authenticated && oldStatus == JS_WaitFD) {
226 pthread_cond_signal(&jcr->job_start_wait); /* wake waiting thread */
229 if (jcr->file_bsock) {
230 bnet_sig(jcr->file_bsock, BNET_TERMINATE);
232 /* If thread waiting on mount, wake him */
233 if (jcr->device && jcr->device->dev &&
234 (jcr->device->dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
235 jcr->device->dev->dev_blocked == BST_UNMOUNTED ||
236 jcr->device->dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
237 pthread_cond_signal(&jcr->device->dev->wait_next_vol);
239 bnet_fsend(dir, _("3000 Job %s marked to be canceled.\n"), jcr->Job);
243 bnet_fsend(dir, _("3993 Error scanning cancel command.\n"));
245 bnet_sig(dir, BNET_EOD);
253 static int label_cmd(JCR *jcr)
255 return do_label(jcr, 0);
258 static int relabel_cmd(JCR *jcr)
260 return do_label(jcr, 1);
263 static int do_label(JCR *jcr, int relabel)
265 POOLMEM *dname, *newname, *oldname, *poolname, *mtype;
266 BSOCK *dir = jcr->dir_bsock;
269 int found = 0, ok = 0;
272 dname = get_memory(dir->msglen+1);
273 newname = get_memory(dir->msglen+1);
274 oldname = get_memory(dir->msglen+1);
275 poolname = get_memory(dir->msglen+1);
276 mtype = get_memory(dir->msglen+1);
278 if (sscanf(dir->msg, "relabel %s OldName=%s NewName=%s PoolName=%s MediaType=%s Slot=%d",
279 dname, oldname, newname, poolname, mtype, &slot) == 6) {
284 if (sscanf(dir->msg, "label %s VolumeName=%s PoolName=%s MediaType=%s Slot=%d",
285 dname, newname, poolname, mtype, &slot) == 5) {
290 unbash_spaces(dname);
291 unbash_spaces(newname);
292 unbash_spaces(oldname);
293 unbash_spaces(poolname);
294 unbash_spaces(mtype);
297 while ((device=(DEVRES *)GetNextRes(R_DEVICE, (RES *)device))) {
298 /* Find resource, and make sure we were able to open it */
299 if (strcmp(device->hdr.name, dname) == 0 && device->dev) {
300 Dmsg1(20, "Found device %s\n", device->hdr.name);
307 /******FIXME**** compare MediaTypes */
308 jcr->device = device;
311 P(dev->mutex); /* Use P to avoid indefinite block */
312 if (!(dev->state & ST_OPENED)) {
313 if (open_dev(dev, newname, READ_WRITE) < 0) {
314 bnet_fsend(dir, _("3994 Connot open device: %s\n"), strerror_dev(dev));
316 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
317 force_close_dev(dev);
319 /* Under certain "safe" conditions, we can steal the lock */
320 } else if (dev->dev_blocked &&
321 (dev->dev_blocked == BST_UNMOUNTED ||
322 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
323 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
324 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
325 } else if (dev->state & ST_READ || dev->num_writers) {
326 if (dev->state & ST_READ) {
327 bnet_fsend(dir, _("3901 Device %s is busy with 1 reader.\n"),
330 bnet_fsend(dir, _("3902 Device %s is busy with %d writer(s).\n"),
331 dev_name(dev), dev->num_writers);
333 } else { /* device not being used */
334 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
338 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
341 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
342 pm_strcpy(&jcr->errmsg, dir->msg);
343 bnet_fsend(dir, _("3903 Error scanning label command: %s\n"), jcr->errmsg);
346 free_memory(oldname);
347 free_memory(newname);
348 free_memory(poolname);
350 bnet_sig(dir, BNET_EOD);
355 * Read the tape label and determine if we can safely
356 * label the tape (not a Bacula volume), then label it.
358 * Enter with the mutex set
360 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
361 char *newname, char *poolname,
362 int slot, int relabel)
364 BSOCK *dir = jcr->dir_bsock;
368 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
370 pm_strcpy(&jcr->VolumeName, newname);
371 jcr->VolCatInfo.Slot = slot;
372 autoload_device(jcr, dev, 0, dir); /* autoload if possible */
373 block = new_block(dev);
375 /* Ensure that the device is open -- autoload_device() closes it */
376 for ( ; !(dev->state & ST_OPENED); ) {
377 if (open_dev(dev, jcr->VolumeName, READ_WRITE) < 0) {
378 if (dev->dev_errno == EAGAIN || dev->dev_errno == EBUSY) {
381 bnet_fsend(dir, _("3910 Unable to open device %s. ERR=%s\n"),
382 dev_name(dev), strerror_dev(dev));
387 /* See what we have for a Volume */
388 switch (read_dev_volume_label(jcr, dev, block)) {
390 case VOL_VERSION_ERROR:
391 case VOL_LABEL_ERROR:
395 "3911 Cannot label Volume because it is already labeled: \"%s\"\n"),
396 dev->VolHdr.VolName);
399 /* Relabel request. If oldname matches, continue */
400 if (strcmp(oldname, dev->VolHdr.VolName) != 0) {
401 bnet_fsend(dir, _("Wrong volume mounted.\n"));
404 /* Fall through wanted! */
407 if (!write_volume_label_to_dev(jcr, jcr->device, newname, poolname)) {
408 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
411 pm_strcpy(&jcr->VolumeName, newname);
412 bnet_fsend(dir, _("3000 OK label. Volume=%s Device=%s\n"),
413 newname, dev->dev_name);
416 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
419 bnet_fsend(dir, _("3913 Cannot label Volume. \
420 Unknown status %d from read_volume_label()\n"), jcr->label_status);
425 give_back_device_lock(dev, &hold);
432 * Read the tape label
434 * Enter with the mutex set
436 static int read_label(JCR *jcr, DEVICE *dev)
439 BSOCK *dir = jcr->dir_bsock;
443 steal_device_lock(dev, &hold, BST_DOING_ACQUIRE);
445 jcr->VolumeName[0] = 0;
446 block = new_block(dev);
447 dev->state &= ~ST_LABEL; /* force read of label */
448 switch (read_dev_volume_label(jcr, dev, block)) {
450 bnet_fsend(dir, _("3001 Mounted Volume: %s\n"), dev->VolHdr.VolName);
454 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device \"%s\" because:\n%s\n"),
455 dev->dev_name, jcr->errmsg);
460 give_back_device_lock(dev, &hold);
465 * Mount command from Director
467 static int mount_cmd(JCR *jcr)
470 BSOCK *dir = jcr->dir_bsock;
475 dev_name = get_memory(dir->msglen+1);
476 if (sscanf(dir->msg, "mount %s", dev_name) == 1) {
477 unbash_spaces(dev_name);
480 while ((device=(DEVRES *)GetNextRes(R_DEVICE, (RES *)device))) {
481 /* Find resource, and make sure we were able to open it */
482 if (strcmp(device->hdr.name, dev_name) == 0 && device->dev) {
483 Dmsg1(20, "Found device %s\n", device->hdr.name);
490 jcr->device = device;
492 P(dev->mutex); /* Use P to avoid indefinite block */
493 switch (dev->dev_blocked) { /* device blocked? */
495 case BST_WAITING_FOR_SYSOP:
496 /* Someone is waiting, wake him */
497 Dmsg0(100, "Waiting for mount. Attempting to wake thread\n");
498 dev->dev_blocked = BST_MOUNT;
499 pthread_cond_signal(&dev->wait_next_vol);
500 bnet_fsend(dir, "3001 OK mount. Device=%s\n", dev->dev_name);
503 case BST_UNMOUNTED_WAITING_FOR_SYSOP:
505 /* We freed the device, so reopen it and wake any waiting threads */
506 if (open_dev(dev, NULL, READ_WRITE) < 0) {
507 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
511 block = new_block(dev);
512 read_dev_volume_label(jcr, dev, block);
514 if (dev->dev_blocked == BST_UNMOUNTED) {
515 Dmsg0(100, "Unmounted. Unblocking device\n");
516 read_label(jcr, dev);
519 Dmsg0(100, "Unmounted waiting for mount. Attempting to wake thread\n");
520 dev->dev_blocked = BST_MOUNT;
521 pthread_cond_signal(&dev->wait_next_vol);
523 if (dev->state & ST_LABEL) {
524 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
525 dev->dev_name, dev->VolHdr.VolName);
527 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
528 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
533 case BST_DOING_ACQUIRE:
534 bnet_fsend(dir, _("3001 Device %s is mounted; doing acquire.\n"),
538 case BST_WRITING_LABEL:
539 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"), dev->dev_name);
542 case BST_NOT_BLOCKED:
543 if (dev->state & ST_OPENED) {
544 if (dev->state & ST_LABEL) {
545 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
546 dev->dev_name, dev->VolHdr.VolName);
548 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
549 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
553 if (!dev_is_tape(dev)) {
554 bnet_fsend(dir, _("3906 cannot mount non-tape.\n"));
557 if (open_dev(dev, NULL, READ_WRITE) < 0) {
558 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
562 read_label(jcr, dev);
563 if (dev->state & ST_LABEL) {
564 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
565 dev->dev_name, dev->VolHdr.VolName);
567 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
568 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
575 bnet_fsend(dir, _("3905 Bizarre wait state %d\n"), dev->dev_blocked);
580 bnet_fsend(dir, _("3999 Device %s not found\n"), dev_name);
583 pm_strcpy(&jcr->errmsg, dir->msg);
584 bnet_fsend(dir, _("3906 Error scanning mount command: %s\n"), jcr->errmsg);
586 free_memory(dev_name);
587 bnet_sig(dir, BNET_EOD);
592 * unmount command from Director
594 static int unmount_cmd(JCR *jcr)
597 BSOCK *dir = jcr->dir_bsock;
602 dname = get_memory(dir->msglen+1);
603 if (sscanf(dir->msg, "unmount %s", dname) == 1) {
604 unbash_spaces(dname);
607 while ((device=(DEVRES *)GetNextRes(R_DEVICE, (RES *)device))) {
608 /* Find resource, and make sure we were able to open it */
609 if (strcmp(device->hdr.name, dname) == 0 && device->dev) {
610 Dmsg1(20, "Found device %s\n", device->hdr.name);
617 jcr->device = device;
619 P(dev->mutex); /* Use P to avoid indefinite block */
620 if (!(dev->state & ST_OPENED)) {
621 Dmsg0(90, "Device already unmounted\n");
622 bnet_fsend(dir, _("3901 Device %s is already unmounted.\n"), dev_name(dev));
624 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP) {
625 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
627 open_dev(dev, NULL, 0); /* fake open for close */
628 offline_or_rewind_dev(dev);
629 force_close_dev(dev);
630 dev->dev_blocked = BST_UNMOUNTED_WAITING_FOR_SYSOP;
631 bnet_fsend(dir, _("3001 Device %s unmounted.\n"), dev_name(dev));
633 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
634 bnet_fsend(dir, _("3902 Device %s is busy in acquire.\n"),
637 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
638 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
641 } else if (dev->state & ST_READ || dev->num_writers) {
642 if (dev->state & ST_READ) {
643 Dmsg0(90, "Device in read mode\n");
644 bnet_fsend(dir, _("3904 Device %s is busy with 1 reader.\n"),
647 Dmsg1(90, "Device busy with %d writers\n", dev->num_writers);
648 bnet_fsend(dir, _("3905 Device %s is busy with %d writer(s).\n"),
649 dev_name(dev), dev->num_writers);
652 } else { /* device not being used */
653 Dmsg0(90, "Device not in use, unmounting\n");
654 /* On FreeBSD, I am having ASSERT() failures in block_device()
655 * and I can only imagine that the thread id that we are
656 * leaving in no_wait_id is being re-used. So here,
657 * we simply do it by hand. Gross, but a solution.
659 /* block_device(dev, BST_UNMOUNTED); replace with 2 lines below */
660 dev->dev_blocked = BST_UNMOUNTED;
662 open_dev(dev, NULL, 0); /* fake open for close */
663 offline_or_rewind_dev(dev);
664 force_close_dev(dev);
665 bnet_fsend(dir, _("3002 Device %s unmounted.\n"), dev_name(dev));
669 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
672 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
673 pm_strcpy(&jcr->errmsg, dir->msg);
674 bnet_fsend(dir, _("3907 Error scanning unmount command: %s\n"), jcr->errmsg);
677 bnet_sig(dir, BNET_EOD);
682 * Release command from Director. This rewinds the device and if
683 * configured does a offline and ensures that Bacula will
684 * re-read the label of the tape before continuing. This gives
685 * the operator the chance to change the tape anytime before the
688 static int release_cmd(JCR *jcr)
691 BSOCK *dir = jcr->dir_bsock;
696 dname = get_memory(dir->msglen+1);
697 if (sscanf(dir->msg, "release %s", dname) == 1) {
698 unbash_spaces(dname);
701 while ((device=(DEVRES *)GetNextRes(R_DEVICE, (RES *)device))) {
702 /* Find resource, and make sure we were able to open it */
703 if (strcmp(device->hdr.name, dname) == 0 && device->dev) {
704 Dmsg1(20, "Found device %s\n", device->hdr.name);
711 jcr->device = device;
713 P(dev->mutex); /* Use P to avoid indefinite block */
714 if (!(dev->state & ST_OPENED)) {
715 Dmsg0(90, "Device already released\n");
716 bnet_fsend(dir, _("3911 Device %s already released.\n"), dev_name(dev));
718 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
719 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP) {
720 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
722 bnet_fsend(dir, _("3912 Device %s waiting for mount.\n"), dev_name(dev));
724 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
725 bnet_fsend(dir, _("3913 Device %s is busy in acquire.\n"),
728 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
729 bnet_fsend(dir, _("3914 Device %s is being labeled.\n"),
732 } else if (dev->state & ST_READ || dev->num_writers) {
733 if (dev->state & ST_READ) {
734 Dmsg0(90, "Device in read mode\n");
735 bnet_fsend(dir, _("3915 Device %s is busy with 1 reader.\n"),
738 Dmsg1(90, "Device busy with %d writers\n", dev->num_writers);
739 bnet_fsend(dir, _("3916 Device %s is busy with %d writer(s).\n"),
740 dev_name(dev), dev->num_writers);
743 } else { /* device not being used */
744 Dmsg0(90, "Device not in use, unmounting\n");
745 release_volume(jcr, dev);
746 bnet_fsend(dir, _("3012 Device %s released.\n"), dev_name(dev));
750 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
753 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
754 pm_strcpy(&jcr->errmsg, dir->msg);
755 bnet_fsend(dir, _("3917 Error scanning release command: %s\n"), jcr->errmsg);
758 bnet_sig(dir, BNET_EOD);
765 * Autochanger command from Director
767 static int autochanger_cmd(JCR *jcr)
770 BSOCK *dir = jcr->dir_bsock;
775 devname = get_memory(dir->msglen+1);
776 if (sscanf(dir->msg, "autochanger list %s ", devname) == 1) {
777 unbash_spaces(devname);
780 while ((device=(DEVRES *)GetNextRes(R_DEVICE, (RES *)device))) {
781 /* Find resource, and make sure we were able to open it */
782 if (strcmp(device->hdr.name, devname) == 0 && device->dev) {
783 Dmsg1(20, "Found device %s\n", device->hdr.name);
790 jcr->device = device;
792 P(dev->mutex); /* Use P to avoid indefinite block */
793 if (!dev_is_tape(dev)) {
794 bnet_fsend(dir, _("3995 Device %s is not an autochanger.\n"),
796 } else if (!(dev->state & ST_OPENED)) {
797 if (open_dev(dev, NULL, READ_WRITE) < 0) {
798 bnet_fsend(dir, _("3994 Connot open device: %s\n"), strerror_dev(dev));
800 autochanger_list(jcr, dev, dir);
801 force_close_dev(dev);
803 /* Under certain "safe" conditions, we can steal the lock */
804 } else if (dev->dev_blocked &&
805 (dev->dev_blocked == BST_UNMOUNTED ||
806 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
807 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
808 autochanger_list(jcr, dev, dir);
809 } else if (dev->state & ST_READ || dev->num_writers) {
810 if (dev->state & ST_READ) {
811 bnet_fsend(dir, _("3901 Device %s is busy with 1 reader.\n"),
814 bnet_fsend(dir, _("3902 Device %s is busy with %d writer(s).\n"),
815 dev_name(dev), dev->num_writers);
817 } else { /* device not being used */
818 autochanger_list(jcr, dev, dir);
822 bnet_fsend(dir, _("3999 Device %s not found\n"), devname);
824 } else { /* error on scanf */
825 pm_strcpy(&jcr->errmsg, dir->msg);
826 bnet_fsend(dir, _("3907 Error scanning autocharger list command: %s\n"),
829 free_memory(devname);
830 bnet_sig(dir, BNET_EOD);