3 * dvd.c -- Routines specific to DVD devices (and
4 * possibly other removable hard media).
11 Copyright (C) 2005-2006 Kern Sibbald
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License
15 version 2 as amended with additional clauses defined in the
16 file LICENSE in the main source directory.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 the file LICENSE for additional details.
28 /* Forward referenced functions */
29 static bool do_mount_dvd(DEVICE* dev, int mount, int dotimeout);
30 static void add_file_and_part_name(DEVICE *dev, POOL_MEM &archive_name);
33 * Write the current volume/part filename to archive_name.
35 void make_mounted_dvd_filename(DEVICE *dev, POOL_MEM &archive_name)
37 pm_strcpy(archive_name, dev->device->mount_point);
38 add_file_and_part_name(dev, archive_name);
39 dev->set_part_spooled(false);
42 void make_spooled_dvd_filename(DEVICE *dev, POOL_MEM &archive_name)
44 /* Use the working directory if spool directory is not defined */
45 if (dev->device->spool_directory) {
46 pm_strcpy(archive_name, dev->device->spool_directory);
48 pm_strcpy(archive_name, working_directory);
50 add_file_and_part_name(dev, archive_name);
51 dev->set_part_spooled(true);
54 static void add_file_and_part_name(DEVICE *dev, POOL_MEM &archive_name)
57 if (archive_name.c_str()[strlen(archive_name.c_str())-1] != '/') {
58 pm_strcat(archive_name, "/");
61 pm_strcat(archive_name, dev->VolCatInfo.VolCatName);
62 /* if part > 1, append .# to the filename (where # is the part number) */
64 pm_strcat(archive_name, ".");
65 bsnprintf(partnumber, sizeof(partnumber), "%d", dev->part);
66 pm_strcat(archive_name, partnumber);
68 Dmsg1(400, "Exit add_file_part_name: arch=%s\n", archive_name.c_str());
72 * If timeout, wait until the mount command returns 0.
73 * If !timeout, try to mount the device only once.
75 bool mount_dvd(DEVICE* dev, int timeout)
77 Dmsg0(90, "Enter mount_dvd\n");
78 if (dev->is_mounted()) {
80 } else if (dev->requires_mount()) {
81 return do_mount_dvd(dev, 1, timeout);
87 * If timeout, wait until the unmount command returns 0.
88 * If !timeout, try to unmount the device only once.
90 bool unmount_dvd(DEVICE *dev, int timeout)
95 Dmsg0(90, "Enter unmount_dvd\n");
96 if (dev->is_mounted()) {
97 return do_mount_dvd(dev, 0, timeout);
102 /* (Un)mount the device */
103 static bool do_mount_dvd(DEVICE* dev, int mount, int dotimeout)
105 POOL_MEM ocmd(PM_FNAME);
110 sm_check(__FILE__, __LINE__, false);
112 if (dev->is_mounted()) {
113 Dmsg0(200, "======= DVD mount=1\n");
116 icmd = dev->device->mount_command;
118 if (!dev->is_mounted()) {
119 Dmsg0(200, "======= DVD mount=0\n");
122 icmd = dev->device->unmount_command;
125 dev->edit_mount_codes(ocmd, icmd);
127 Dmsg2(200, "do_mount_dvd: cmd=%s mounted=%d\n", ocmd.c_str(), !!dev->is_mounted());
130 /* Try at most 1 time to (un)mount the device. This should perhaps be configurable. */
135 results = get_memory(2000);
137 /* If busy retry each second */
138 Dmsg1(100, "Run prog=%s\n", ocmd.c_str());
139 while ((status = run_program_full_output(ocmd.c_str(),
140 dev->max_open_wait/2, results)) != 0) {
141 Dmsg2(99, "Mount status=%d result=%s\n", status, results);
142 /* Doesn't work with internationalisation (This is not a problem) */
143 if (mount && fnmatch("*is already mounted on*", results, 0) == 0) {
146 if (!mount && fnmatch("* not mounted*", results, 0) == 0) {
150 /* Sometimes the device cannot be mounted because it is already mounted.
151 * Try to unmount it, then remount it */
153 Dmsg1(400, "Trying to unmount the device %s...\n", dev->print_name());
154 do_mount_dvd(dev, 0, 0);
161 Dmsg5(40, "Device %s cannot be %smounted. stat=%d result=%s ERR=%s\n", dev->print_name(),
162 (mount ? "" : "un"), status, results, be.strerror(status));
163 Mmsg(dev->errmsg, _("Device %s cannot be %smounted. ERR=%s\n"),
164 dev->print_name(), (mount ? "" : "un"), be.strerror(status));
166 Dmsg4(40, "Device %s cannot be %smounted. stat=%d ERR=%s\n", dev->print_name(),
167 (mount ? "" : "un"), status, results);
168 Mmsg(dev->errmsg, _("Device %s cannot be %smounted. ERR=%s\n"),
169 dev->print_name(), (mount ? "" : "un"), results);
172 * Now, just to be sure it is not mounted, try to read the
176 struct dirent *entry, *result;
180 name_max = pathconf(".", _PC_NAME_MAX);
181 if (name_max < 1024) {
185 if (!(dp = opendir(dev->device->mount_point))) {
187 dev->dev_errno = errno;
188 Dmsg3(29, "do_mount_dvd: failed to open dir %s (dev=%s), ERR=%s\n",
189 dev->device->mount_point, dev->print_name(), be.strerror());
193 entry = (struct dirent *)malloc(sizeof(struct dirent) + name_max + 1000);
196 if ((readdir_r(dp, entry, &result) != 0) || (result == NULL)) {
197 dev->dev_errno = EIO;
198 Dmsg2(129, "do_mount_dvd: failed to find suitable file in dir %s (dev=%s)\n",
199 dev->device->mount_point, dev->print_name());
202 if (strcmp(result->d_name, ".") && strcmp(result->d_name, "..") &&
203 strcmp(result->d_name, ".keep")) {
204 count++; /* result->d_name != ., .. or .keep (Gentoo-specific) */
205 Dmsg1(100, "Inc count=%d\n", count);
208 Dmsg2(129, "do_mount_dvd: ignoring %s in %s\n",
209 result->d_name, dev->device->mount_point);
215 Dmsg1(29, "do_mount_dvd: got %d files in the mount point (not counting ., .. and .keep)\n", count);
218 /* If we got more than ., .. and .keep */
219 /* there must be something mounted */
221 Dmsg1(100, "Did Mount by count=%d\n", count);
224 /* An unmount request. We failed to unmount - report an error */
225 dev->set_mounted(true);
226 free_pool_memory(results);
227 Dmsg0(200, "== DVD mount=1\n");
232 dev->set_mounted(false);
233 sm_check(__FILE__, __LINE__, false);
234 free_pool_memory(results);
235 Dmsg0(200, "== DVD mount=0\n");
238 Dmsg0(100, "Out of mount/umount loop\n");
240 dev->set_mounted(mount); /* set/clear mounted flag */
241 free_pool_memory(results);
242 /* Do not check free space when unmounting */
244 Dmsg0(100, "Calling update_free_space\n");
245 if (!update_free_space_dev(dev)) {
249 Dmsg1(200, "== DVD mount=%d\n", mount);
253 /* Update the free space on the device */
254 bool update_free_space_dev(DEVICE* dev)
256 POOL_MEM ocmd(PM_FNAME);
265 /* The device must be mounted in order to dvd-freespace to work */
268 sm_check(__FILE__, __LINE__, false);
269 icmd = dev->device->free_space_command;
273 dev->free_space_errno = 0;
274 dev->clear_freespace_ok(); /* No valid freespace */
276 Dmsg2(29, "ERROR: update_free_space_dev: free_space=%s, free_space_errno=%d (!icmd)\n",
277 edit_uint64(dev->free_space, ed1), dev->free_space_errno);
278 Mmsg(dev->errmsg, _("No FreeSpace command defined.\n"));
282 dev->edit_mount_codes(ocmd, icmd);
284 Dmsg1(29, "update_free_space_dev: cmd=%s\n", ocmd.c_str());
286 results = get_pool_memory(PM_MESSAGE);
288 /* Try at most 3 times to get the free space on the device. This should perhaps be configurable. */
293 Dmsg1(100, "Run prog=%s\n", ocmd.c_str());
294 status = run_program_full_output(ocmd.c_str(), dev->max_open_wait/2, results);
296 free = str_to_int64(results);
297 Dmsg1(400, "Free space program run: Freespace=%s\n", results);
299 dev->free_space = free;
300 dev->free_space_errno = 0;
301 dev->set_freespace_ok(); /* have valid freespace */
303 Mmsg(dev->errmsg, "");
309 dev->free_space_errno = EPIPE;
310 dev->clear_freespace_ok(); /* no valid freespace */
311 Mmsg2(dev->errmsg, _("Cannot run free space command. Results=%s ERR=%s\n"),
312 results, be.strerror(status));
315 Dmsg4(40, "Cannot get free space on device %s. free_space=%s, "
316 "free_space_errno=%d ERR=%s\n", dev->print_name(),
317 edit_uint64(dev->free_space, ed1), dev->free_space_errno,
323 dev->dev_errno = dev->free_space_errno;
324 Dmsg4(40, "Cannot get free space on device %s. free_space=%s, "
325 "free_space_errno=%d ERR=%s\n",
326 dev->print_name(), edit_uint64(dev->free_space, ed1),
327 dev->free_space_errno, dev->errmsg);
331 free_pool_memory(results);
332 Dmsg4(29, "leave update_free_space_dev: free_space=%s freespace_ok=%d free_space_errno=%d have_media=%d\n",
333 edit_uint64(dev->free_space, ed1), !!dev->is_freespace_ok(), dev->free_space_errno, !!dev->have_media());
334 sm_check(__FILE__, __LINE__, false);
339 * Note!!!! Part numbers now begin at 1. The part number is
340 * suppressed from the first part, which is just the Volume
341 * name. Each subsequent part is the Volumename.partnumber.
343 * Write a part (Vol, Vol.2, ...) from the spool to the DVD
344 * This routine does not update the part number, so normally, you
345 * should call open_next_part()
347 * It is also called from truncate_dvd to "blank" the medium, as
348 * well as from block.c when the DVD is full to write the last part.
350 bool dvd_write_part(DCR *dcr)
352 DEVICE *dev = dcr->dev;
353 POOL_MEM archive_name(PM_FNAME);
355 /* Don't write empty part files.
356 * This is only useful when growisofs does not support write beyond
359 * - 3.9 GB on the volume, dvd-freespace reports 0.4 GB free
360 * - Write 0.2 GB on the volume, Bacula thinks it could still
361 * append data, it creates a new empty part.
362 * - dvd-freespace reports 0 GB free, as the 4GB boundary has
364 * - Bacula thinks he must finish to write to the device, so it
365 * tries to write the last part (0-byte), but dvd-writepart fails...
367 * ***FIXME**** we cannot write a blank part!!!!!!!
368 * There is one exception: when recycling a volume, we write a blank part
369 * file, so, then, we need to accept to write it.
371 if (dev->part_size == 0) {
372 Dmsg2(29, "dvd_write_part: device is %s, won't write blank part %d\n", dev->print_name(), dev->part);
373 /* Delete spool file */
374 make_spooled_dvd_filename(dev, archive_name);
375 unlink(archive_name.c_str());
376 Dmsg1(29, "unlink(%s)\n", archive_name.c_str());
377 sm_check(__FILE__, __LINE__, false);
381 POOL_MEM ocmd(PM_FNAME);
382 POOL_MEM results(PM_MESSAGE);
388 sm_check(__FILE__, __LINE__, false);
389 Dmsg3(29, "dvd_write_part: device is %s, part is %d, is_mounted=%d\n", dev->print_name(), dev->part, dev->is_mounted());
390 icmd = dev->device->write_part_command;
392 dev->edit_mount_codes(ocmd, icmd);
395 * original line follows
396 * timeout = dev->max_open_wait + (dev->max_part_size/(1350*1024/2));
397 * I modified this for a longer timeout; pre-formatting, blanking and
398 * writing can take quite a while
401 /* Explanation of the timeout value, when writing the first part,
403 * 9 GB, write speed 1x: 6990 seconds (almost 2 hours...)
404 * Overhead: 900 seconds (starting, initializing, finalizing,probably
405 * reloading 15 minutes)
407 * A reasonable last-exit timeout would be 16000 seconds. Quite long -
408 * almost 4.5 hours, but hopefully, that timeout will only ever be needed
409 * in case of a serious emergency.
415 timeout = dev->max_open_wait + (dev->part_size/(1350*1024/4));
417 Dmsg2(29, "dvd_write_part: cmd=%s timeout=%d\n", ocmd.c_str(), timeout);
419 status = run_program_full_output(ocmd.c_str(), timeout, results.c_str());
422 Jmsg2(dcr->jcr, M_FATAL, 0, _("Error writing part %d to the DVD: ERR=%s\n"),
423 dev->part, results.c_str());
424 Mmsg1(dev->errmsg, _("Error while writing current part to the DVD: %s"),
426 Dmsg1(000, "%s\n", dev->errmsg);
427 dev->dev_errno = EIO;
428 mark_volume_in_error(dcr);
429 sm_check(__FILE__, __LINE__, false);
430 dev->truncated_dvd = false;
433 Jmsg(dcr->jcr, M_INFO, 0, _("Part %d written to DVD.\n"), dev->part);
434 if (dev->truncated_dvd) {
435 dev->truncated_dvd = false; /* turn off flag */
436 } else { /* DVD part written */
437 dev->num_dvd_parts++; /* there is now one more part on DVD */
438 dev->VolCatInfo.VolCatParts = dev->num_dvd_parts;
441 /* Delete spool file */
442 make_spooled_dvd_filename(dev, archive_name);
443 unlink(archive_name.c_str());
444 Dmsg1(29, "unlink(%s)\n", archive_name.c_str());
445 sm_check(__FILE__, __LINE__, false);
447 /* growisofs umounted the device, so remount it (it will update the free space) */
448 dev->clear_mounted();
450 Jmsg(dcr->jcr, M_INFO, 0, _("Remaining free space %s on %s\n"),
451 edit_uint64_with_commas(dev->free_space, ed1), dev->print_name());
452 sm_check(__FILE__, __LINE__, false);
457 * Open the next part file.
459 * - Increment part number
460 * - Reopen the device
462 int dvd_open_next_part(DCR *dcr)
464 DEVICE *dev = dcr->dev;
467 Dmsg6(29, "Enter: == open_next_part part=%d npart=%d dev=%s vol=%s mode=%d file_addr=%d\n",
468 dev->part, dev->num_dvd_parts, dev->print_name(),
469 dev->VolCatInfo.VolCatName, dev->openmode, dev->file_addr);
470 if (!dev->is_dvd()) {
471 Dmsg1(000, "Device %s is not dvd!!!!\n", dev->print_name());
475 /* When appending, do not open a new part if the current is empty */
476 if (dev->can_append() && (dev->part > dev->num_dvd_parts) &&
477 (dev->part_size == 0)) {
478 Dmsg0(29, "open_next_part exited immediately (dev->part_size == 0).\n");
483 * Note, when we close, the Volume header is zeroed. Since
484 * we reopen, but are in fact opening the same volume without
485 * re-reading the Volume header, we simply save and restore it.
487 memcpy(&VolHdr, &dev->VolHdr, sizeof(VolHdr));
488 dev->close(); /* close current part */
489 memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
492 * If we have a part open for write, then write it to
493 * DVD before opening the next part.
495 if (dev->part > dev->num_dvd_parts && dev->can_append()) {
496 Dmsg2(100, "Before open next write previous. part=%d num_parts=%d\n",
497 dev->part, dev->num_dvd_parts);
498 if (!dvd_write_part(dcr)) {
499 Dmsg0(29, "Error in dvd_write part.\n");
504 dev->part_start += dev->part_size;
506 Dmsg2(29, "Inc part=%d num_dvd_parts=%d\n", dev->part, dev->num_dvd_parts);
508 if (dev->num_dvd_parts < dev->part) {
509 POOL_MEM archive_name(PM_FNAME);
512 * First check what is on DVD. If our part is there, we
513 * are in trouble, so bail out.
514 * NB: This is however not a problem if we are writing the first part.
515 * It simply means that we are overriding an existing volume...
517 if (dev->num_dvd_parts > 0) {
518 make_mounted_dvd_filename(dev, archive_name); /* makes dvd name */
519 Dmsg1(100, "Check if part on DVD: %s\n", archive_name.c_str());
520 if (stat(archive_name.c_str(), &buf) == 0) {
521 /* bad news bail out */
522 Mmsg1(&dev->errmsg, _("Next Volume part already exists on DVD. Cannot continue: %s\n"),
523 archive_name.c_str());
528 Dmsg2(400, "num_dvd_parts=%d part=%d\n", dev->num_dvd_parts, dev->part);
529 make_spooled_dvd_filename(dev, archive_name); /* makes spool name */
531 /* Check if the next part exists in spool directory . */
532 Dmsg1(100, "Check if part on spool: $s\n", archive_name.c_str());
533 if ((stat(archive_name.c_str(), &buf) == 0) || (errno != ENOENT)) {
534 Dmsg1(29, "open_next_part %s is in the way, deleting it...\n", archive_name.c_str());
535 /* Then try to unlink it */
536 if (unlink(archive_name.c_str()) < 0) {
538 dev->dev_errno = errno;
539 Mmsg2(dev->errmsg, _("open_next_part can't unlink existing part %s, ERR=%s\n"),
540 archive_name.c_str(), be.strerror());
546 Dmsg2(400, "Call dev->open(vol=%s, mode=%d)\n", dcr->VolCatInfo.VolCatName,
549 /* Open next part. Note, this sets part_size for part opened. */
550 if (dev->open(dcr, OPEN_READ_ONLY) < 0) {
553 /* Restore Volume header record */
554 memcpy(&dev->VolHdr, &VolHdr, sizeof(dev->VolHdr));
555 dev->set_labeled(); /* all next parts are "labeled" */
561 * Open the first part file.
563 * - Reopen the device
565 int dvd_open_first_part(DCR *dcr, int mode)
567 DEVICE *dev = dcr->dev;
570 Dmsg5(29, "Enter: ==== open_first_part dev=%s Vol=%s mode=%d num_dvd_parts=%d append=%d\n", dev->print_name(),
571 dev->VolCatInfo.VolCatName, dev->openmode, dev->num_dvd_parts, dev->can_append());
575 * Note, when we close, the Volume header is zeroed. Since
576 * we reopen, but are in fact opening the same volume without
577 * re-reading the Volume header, we simply save and restore it.
579 memcpy(&VolHdr, &dev->VolHdr, sizeof(VolHdr));
581 memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
583 Dmsg2(400, "Call dev->open(vol=%s, mode=%d)\n", dcr->VolCatInfo.VolCatName,
585 Dmsg0(100, "Set part=1\n");
590 /* Restore Volume header record */
591 memcpy(&dev->VolHdr, &VolHdr, sizeof(dev->VolHdr));
592 if (dev->open(dcr, mode) < 0) {
593 Dmsg0(400, "open dev() failed\n");
596 Dmsg2(400, "Leave open_first_part state=%s append=%d\n", dev->is_open()?"open":"not open", dev->can_append());
602 /* Protected version of lseek, which opens the right part if necessary */
603 off_t lseek_dev(DEVICE *dev, off_t offset, int whence)
607 char ed1[50], ed2[50];
609 Dmsg3(400, "Enter lseek_dev fd=%d part=%d nparts=%d\n", dev->fd,
610 dev->part, dev->num_dvd_parts);
611 if (!dev->is_dvd()) {
612 Dmsg0(400, "Using sys lseek\n");
613 return lseek(dev->fd, offset, whence);
616 /* Return I/O error ... no part */
617 if (dev->part > dev->num_dvd_parts) {
621 dcr = (DCR *)dev->attached_dcrs->first(); /* any dcr will do */
624 Dmsg2(400, "lseek_dev SEEK_SET to %s (part_start=%s)\n",
625 edit_uint64(offset, ed1), edit_uint64(dev->part_start, ed2));
626 if ((uint64_t)offset >= dev->part_start) {
627 if ((uint64_t)offset < dev->part_start+dev->part_size) {
628 /* We are staying in the current part, just seek */
629 if ((pos = lseek(dev->fd, offset-dev->part_start, SEEK_SET)) < 0) {
632 return pos + dev->part_start;
635 /* Load next part, and start again */
636 Dmsg0(100, "lseek open next part\n");
637 if (dvd_open_next_part(dcr) < 0) {
638 Dmsg0(400, "lseek_dev failed while trying to open the next part\n");
641 Dmsg2(100, "Recurse lseek after open next part=%d num_part=%d\n",
642 dev->part, dev->num_dvd_parts);
643 return lseek_dev(dev, offset, SEEK_SET);
647 * pos < dev->part_start :
648 * We need to access a previous part,
649 * so just load the first one, and seek again
650 * until the right one is loaded
652 Dmsg0(100, "lseek open first part\n");
653 if (dvd_open_first_part(dcr, dev->openmode) < 0) {
654 Dmsg0(400, "lseek_dev failed while trying to open the first part\n");
657 Dmsg2(100, "Recurse lseek after open first part=%d num_part=%d\n",
658 dev->part, dev->num_dvd_parts);
659 return lseek_dev(dev, offset, SEEK_SET);
663 Dmsg1(400, "lseek_dev SEEK_CUR to %s\n", edit_uint64(offset, ed1));
664 if ((pos = lseek(dev->fd, (off_t)0, SEEK_CUR)) < 0) {
667 pos += dev->part_start;
669 Dmsg1(400, "lseek_dev SEEK_CUR returns %s\n", edit_uint64(pos, ed1));
671 } else { /* Not used in Bacula, but should work */
672 return lseek_dev(dev, pos, SEEK_SET);
676 Dmsg1(400, "lseek_dev SEEK_END to %s\n", edit_uint64(offset, ed1));
678 * Bacula does not use offsets for SEEK_END
679 * Also, Bacula uses seek_end only when it wants to
680 * append to the volume, so for a dvd that means
681 * that the volume must be spooled since the DVD
682 * itself is read-only (as currently implemented).
684 if (offset > 0) { /* Not used by bacula */
685 Dmsg1(400, "lseek_dev SEEK_END called with an invalid offset %s\n",
686 edit_uint64(offset, ed1));
690 /* If we are already on a spooled part and have the
691 * right part number, simply seek
693 if (dev->is_part_spooled() && dev->part > dev->num_dvd_parts) {
694 if ((pos = lseek(dev->fd, (off_t)0, SEEK_END)) < 0) {
697 Dmsg1(400, "lseek_dev SEEK_END returns %s\n",
698 edit_uint64(pos + dev->part_start, ed1));
699 return pos + dev->part_start;
703 * Load the first part, then load the next until we reach the last one.
704 * This is the only way to be sure we compute the right file address.
706 * Save previous openmode, and open all but last part read-only
709 int modesave = dev->openmode;
710 if (dvd_open_first_part(dcr, OPEN_READ_ONLY) < 0) {
711 Dmsg0(400, "lseek_dev failed while trying to open the first part\n");
714 if (dev->num_dvd_parts > 0) {
715 while (dev->part < dev->num_dvd_parts) {
716 if (dvd_open_next_part(dcr) < 0) {
717 Dmsg0(400, "lseek_dev failed while trying to open the next part\n");
721 dev->openmode = modesave;
722 if (dvd_open_next_part(dcr) < 0) {
723 Dmsg0(400, "lseek_dev failed while trying to open the next part\n");
727 return lseek_dev(dev, 0, SEEK_END);
736 bool dvd_close_job(DCR *dcr)
738 DEVICE *dev = dcr->dev;
742 /* If the device is a dvd and WritePartAfterJob
743 * is set to yes, open the next part, so, in case of a device
744 * that requires mount, it will be written to the device.
746 if (dev->is_dvd() && jcr->write_part_after_job && (dev->part_size > 0)) {
747 Dmsg1(400, "Writing last part=%d write_partafter_job is set.\n",
749 if (dev->part < dev->num_dvd_parts+1) {
750 Jmsg3(jcr, M_FATAL, 0, _("Error writing. Current part less than total number of parts (%d/%d, device=%s)\n"),
751 dev->part, dev->num_dvd_parts, dev->print_name());
752 dev->dev_errno = EIO;
756 if (ok && !dvd_write_part(dcr)) {
757 Jmsg2(jcr, M_FATAL, 0, _("Unable to write last on %s: ERR=%s\n"),
758 dev->print_name(), dev->bstrerror());
759 dev->dev_errno = EIO;
766 bool truncate_dvd(DCR *dcr)
768 DEVICE* dev = dcr->dev;
771 memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
773 if (!unmount_dvd(dev, 1)) {
774 Dmsg0(400, "truncate_dvd: Failed to unmount DVD\n");
778 /* Set num_dvd_parts to zero (on disk) */
779 dev->num_dvd_parts = 0;
780 dcr->VolCatInfo.VolCatParts = 0;
781 dev->VolCatInfo.VolCatParts = 0;
783 Dmsg0(400, "truncate_dvd: Opening first part (1)...\n");
785 dev->truncating = true;
786 if (dvd_open_first_part(dcr, CREATE_READ_WRITE) < 0) {
787 Dmsg0(400, "truncate_dvd: Error while opening first part (1).\n");
788 dev->truncating = false;
792 Dmsg0(400, "truncate_dvd: Truncating...\n");
794 /* If necessary, truncate it spool file. */
795 if (ftruncate(dev->fd, 0) != 0) {
797 Mmsg2(dev->errmsg, _("Unable to truncate device %s. ERR=%s\n"),
798 dev->print_name(), be.strerror());
799 dev->truncating = false;
804 memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
806 Dmsg0(400, "truncate_dvd: Opening first part (2)...\n");
809 * Now actually truncate the DVD
810 * This is really kludgy, why not an argument or a separate
813 if (!dvd_write_part(dcr)) {
814 Dmsg0(400, "truncate_dvd: Error while writing to DVD.\n");
815 dev->truncating = false;
818 dev->truncating = false;
820 /* Set num_dvd_parts to zero (on disk) */
821 dev->num_dvd_parts = 0;
822 dcr->VolCatInfo.VolCatParts = 0;
823 dev->VolCatInfo.VolCatParts = 0;
826 if (!dir_update_volume_info(dcr, false)) {
830 if (dvd_open_first_part(dcr, OPEN_READ_WRITE) < 0) {
831 Dmsg0(400, "truncate_dvd: Error while opening first part (2).\n");
838 /* Checks if we can write on a non-blank DVD: meaning that it just have been
839 * truncated (there is only one zero-sized file on the DVD, with the right
842 * Note! Normally if we can mount the device, which should be the case
843 * when we get here, it is not a blank DVD. Hence we check if
844 * there is a zero length file with the right name, in which case
846 * This seems terribly kludgie to me. KES
848 bool check_can_write_on_non_blank_dvd(DCR *dcr)
850 DEVICE* dev = dcr->dev;
852 struct dirent *entry, *result;
855 bool matched = false;
856 struct stat filestat;
858 name_max = pathconf(".", _PC_NAME_MAX);
859 if (name_max < 1024) {
863 if (!(dp = opendir(dev->device->mount_point))) {
865 dev->dev_errno = errno;
866 Dmsg3(29, "check_can_write_on_non_blank_dvd: failed to open dir %s (dev=%s), ERR=%s\n",
867 dev->device->mount_point, dev->print_name(), be.strerror());
871 entry = (struct dirent *)malloc(sizeof(struct dirent) + name_max + 1000);
873 if ((readdir_r(dp, entry, &result) != 0) || (result == NULL)) {
874 dev->dev_errno = EIO;
875 Dmsg2(129, "check_can_write_on_non_blank_dvd: no more files in dir %s (dev=%s)\n",
876 dev->device->mount_point, dev->print_name());
879 Dmsg2(99, "check_can_write_on_non_blank_dvd: found %s (versus %s)\n",
880 result->d_name, dev->VolCatInfo.VolCatName);
881 if (strcmp(result->d_name, dev->VolCatInfo.VolCatName) == 0) {
882 /* Found the file, checking it is empty */
883 POOL_MEM filename(PM_FNAME);
884 pm_strcpy(filename, dev->device->mount_point);
885 if (filename.c_str()[strlen(filename.c_str())-1] != '/') {
886 pm_strcat(filename, "/");
888 pm_strcat(filename, dev->VolCatInfo.VolCatName);
889 if (stat(filename.c_str(), &filestat) < 0) {
891 dev->dev_errno = errno;
892 Dmsg2(29, "check_can_write_on_non_blank_dvd: cannot stat file (file=%s), ERR=%s\n",
893 filename.c_str(), be.strerror());
896 Dmsg2(99, "check_can_write_on_non_blank_dvd: size of %s is %d\n",
897 filename.c_str(), filestat.st_size);
898 matched = filestat.st_size == 0;
907 /* There are more than 3 files (., .., and the volume file) */
908 Dmsg1(29, "Cannot write on blank DVD too many files %d greater than 3\n", count);
912 Dmsg2(29, "OK can_write_on_non_blank_dvd: got %d files in the mount point (matched=%d)\n", count, matched);