2 Bacula® - The Network Backup Solution
4 Copyright (C) 2003-2008 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of John Walker.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * Bacula low level File I/O routines. This routine simulates
30 * open(), read(), write(), and close(), but using native routines.
31 * I.e. on Windows, we use Windows APIs.
33 * Kern Sibbald, April MMIII
42 int (*plugin_bopen)(JCR *jcr, const char *fname, int flags, mode_t mode) = NULL;
43 int (*plugin_bclose)(JCR *jcr) = NULL;
44 ssize_t (*plugin_bread)(JCR *jcr, void *buf, size_t count) = NULL;
45 ssize_t (*plugin_bwrite)(JCR *jcr, void *buf, size_t count) = NULL;
46 boffset_t (*plugin_blseek)(JCR *jcr, boffset_t offset, int whence) = NULL;
50 #include <sys/paths.h>
53 #if !defined(HAVE_FDATASYNC)
58 /* ===============================================================
60 * U N I X AND W I N D O W S
62 * ===============================================================
65 bool is_win32_stream(int stream)
68 case STREAM_WIN32_DATA:
69 case STREAM_WIN32_GZIP_DATA:
70 case STREAM_ENCRYPTED_WIN32_DATA:
71 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
77 const char *stream_to_ascii(int stream)
82 case STREAM_UNIX_ATTRIBUTES:
83 return _("Unix attributes");
84 case STREAM_FILE_DATA:
85 return _("File data");
86 case STREAM_MD5_DIGEST:
87 return _("MD5 digest");
88 case STREAM_GZIP_DATA:
89 return _("GZIP data");
90 case STREAM_UNIX_ATTRIBUTES_EX:
91 return _("Extended attributes");
92 case STREAM_SPARSE_DATA:
93 return _("Sparse data");
94 case STREAM_SPARSE_GZIP_DATA:
95 return _("GZIP sparse data");
96 case STREAM_PROGRAM_NAMES:
97 return _("Program names");
98 case STREAM_PROGRAM_DATA:
99 return _("Program data");
100 case STREAM_SHA1_DIGEST:
101 return _("SHA1 digest");
102 case STREAM_WIN32_DATA:
103 return _("Win32 data");
104 case STREAM_WIN32_GZIP_DATA:
105 return _("Win32 GZIP data");
106 case STREAM_MACOS_FORK_DATA:
107 return _("MacOS Fork data");
108 case STREAM_HFSPLUS_ATTRIBUTES:
109 return _("HFS+ attribs");
110 case STREAM_UNIX_ACCESS_ACL:
111 return _("Standard Unix ACL attribs");
112 case STREAM_UNIX_DEFAULT_ACL:
113 return _("Default Unix ACL attribs");
114 case STREAM_SHA256_DIGEST:
115 return _("SHA256 digest");
116 case STREAM_SHA512_DIGEST:
117 return _("SHA512 digest");
118 case STREAM_SIGNED_DIGEST:
119 return _("Signed digest");
120 case STREAM_ENCRYPTED_FILE_DATA:
121 return _("Encrypted File data");
122 case STREAM_ENCRYPTED_WIN32_DATA:
123 return _("Encrypted Win32 data");
124 case STREAM_ENCRYPTED_SESSION_DATA:
125 return _("Encrypted session data");
126 case STREAM_ENCRYPTED_FILE_GZIP_DATA:
127 return _("Encrypted GZIP data");
128 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
129 return _("Encrypted Win32 GZIP data");
130 case STREAM_ENCRYPTED_MACOS_FORK_DATA:
131 return _("Encrypted MacOS fork data");
133 sprintf(buf, "%d", stream);
134 return (const char *)buf;
139 void int64_LE2BE(int64_t* pBE, const int64_t v)
141 /* convert little endian to big endian */
142 if (htonl(1) != 1L) { /* no work if on little endian machine */
143 memcpy(pBE, &v, sizeof(int64_t));
146 uint8_t rv[sizeof(int64_t)];
147 uint8_t *pv = (uint8_t *) &v;
149 for (i = 0; i < 8; i++) {
152 memcpy(pBE, &rv, sizeof(int64_t));
157 void int32_LE2BE(int32_t* pBE, const int32_t v)
159 /* convert little endian to big endian */
160 if (htonl(1) != 1L) { /* no work if on little endian machine */
161 memcpy(pBE, &v, sizeof(int32_t));
164 uint8_t rv[sizeof(int32_t)];
165 uint8_t *pv = (uint8_t *) &v;
167 for (i = 0; i < 4; i++) {
170 memcpy(pBE, &rv, sizeof(int32_t));
175 bool processWin32BackupAPIBlock (BFILE *bfd, void *pBuffer, ssize_t dwSize)
177 /* pByte contains the buffer
178 dwSize the len to be processed. function assumes to be
179 called in successive incremental order over the complete
180 BackupRead stream beginning at pos 0 and ending at the end.
183 PROCESS_WIN32_BACKUPAPIBLOCK_CONTEXT* pContext = &(bfd->win32DecompContext);
184 bool bContinue = false;
185 int64_t dwDataOffset = 0;
188 /* Win32 Stream Header size without name of stream.
189 * = sizeof (WIN32_STREAM_ID)- sizeof(WCHAR*);
191 int32_t dwSizeHeader = 20;
194 if (pContext->liNextHeader >= dwSize) {
195 dwDataLen = dwSize-dwDataOffset;
196 bContinue = false; /* 1 iteration is enough */
198 dwDataLen = pContext->liNextHeader-dwDataOffset;
199 bContinue = true; /* multiple iterations may be necessary */
203 /* copy block of real DATA */
204 if (pContext->bIsInData) {
205 if (bwrite(bfd, ((char *)pBuffer)+dwDataOffset, dwDataLen) != (ssize_t)dwDataLen)
209 if (pContext->liNextHeader < dwSize) {/* is a header in this block ? */
210 int32_t dwOffsetTarget;
211 int32_t dwOffsetSource;
213 if (pContext->liNextHeader < 0) {
214 /* start of header was before this block, so we
215 * continue with the part in the current block
217 dwOffsetTarget = -pContext->liNextHeader;
220 /* start of header is inside of this block */
222 dwOffsetSource = pContext->liNextHeader;
225 int32_t dwHeaderPartLen = dwSizeHeader-dwOffsetTarget;
226 bool bHeaderIsComplete;
228 if (dwHeaderPartLen <= dwSize-dwOffsetSource) {
229 /* header (or rest of header) is completely available
232 bHeaderIsComplete = true;
234 /* header will continue in next block */
235 bHeaderIsComplete = false;
236 dwHeaderPartLen = dwSize-dwOffsetSource;
239 /* copy the available portion of header to persistent copy */
240 memcpy(((char *)&pContext->header_stream)+dwOffsetTarget, ((char *)pBuffer)+dwOffsetSource, dwHeaderPartLen);
242 /* recalculate position of next header */
243 if (bHeaderIsComplete) {
244 /* convert stream name size (32 bit little endian) to machine type */
246 int32_LE2BE (&dwNameSize, pContext->header_stream.dwStreamNameSize);
247 dwDataOffset = dwNameSize+pContext->liNextHeader+dwSizeHeader;
249 /* convert stream size (64 bit little endian) to machine type */
250 int64_LE2BE (&(pContext->liNextHeader), pContext->header_stream.Size);
251 pContext->liNextHeader += dwDataOffset;
253 pContext->bIsInData = pContext->header_stream.dwStreamId == WIN32_BACKUP_DATA;
254 if (dwDataOffset == dwSize)
257 /* stop and continue with next block */
259 pContext->bIsInData = false;
264 /* set "NextHeader" relative to the beginning of the next block */
265 pContext->liNextHeader-= dwSize;
272 /* ===============================================================
276 * ===============================================================
279 #if defined(HAVE_WIN32)
281 void unix_name_to_win32(POOLMEM **win32_name, char *name);
282 extern "C" HANDLE get_osfhandle(int fd);
285 void binit(BFILE *bfd)
287 memset(bfd, 0, sizeof(BFILE));
289 bfd->mode = BF_CLOSED;
290 bfd->use_backup_api = have_win32_api();
291 bfd->cmd_plugin = false;
295 * Enables using the Backup API (win32_data).
296 * Returns 1 if function worked
297 * Returns 0 if failed (i.e. do not have Backup API on this machine)
299 bool set_win32_backup(BFILE *bfd)
301 /* We enable if possible here */
302 bfd->use_backup_api = have_win32_api();
303 return bfd->use_backup_api;
307 bool set_portable_backup(BFILE *bfd)
309 bfd->use_backup_api = false;
313 bool set_cmd_plugin(BFILE *bfd, JCR *jcr)
315 bfd->cmd_plugin = true;
321 * Return 1 if we are NOT using Win32 BackupWrite()
324 bool is_portable_backup(BFILE *bfd)
326 return !bfd->use_backup_api;
329 bool have_win32_api()
331 return p_BackupRead && p_BackupWrite;
336 * Return true if we support the stream
337 * false if we do not support the stream
339 * This code is running under Win32, so we
340 * do not need #ifdef on MACOS ...
342 bool is_restore_stream_supported(int stream)
346 /* Streams known not to be supported */
348 case STREAM_GZIP_DATA:
349 case STREAM_SPARSE_GZIP_DATA:
350 case STREAM_WIN32_GZIP_DATA:
352 case STREAM_MACOS_FORK_DATA:
353 case STREAM_HFSPLUS_ATTRIBUTES:
354 case STREAM_ENCRYPTED_MACOS_FORK_DATA:
359 case STREAM_GZIP_DATA:
360 case STREAM_SPARSE_GZIP_DATA:
361 case STREAM_WIN32_GZIP_DATA:
363 case STREAM_WIN32_DATA:
364 case STREAM_UNIX_ATTRIBUTES:
365 case STREAM_FILE_DATA:
366 case STREAM_MD5_DIGEST:
367 case STREAM_UNIX_ATTRIBUTES_EX:
368 case STREAM_SPARSE_DATA:
369 case STREAM_PROGRAM_NAMES:
370 case STREAM_PROGRAM_DATA:
371 case STREAM_SHA1_DIGEST:
373 case STREAM_SHA256_DIGEST:
374 case STREAM_SHA512_DIGEST:
377 case STREAM_SIGNED_DIGEST:
378 case STREAM_ENCRYPTED_FILE_DATA:
379 case STREAM_ENCRYPTED_FILE_GZIP_DATA:
380 case STREAM_ENCRYPTED_WIN32_DATA:
381 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
383 case 0: /* compatibility with old tapes */
389 HANDLE bget_handle(BFILE *bfd)
394 int bopen(BFILE *bfd, const char *fname, int flags, mode_t mode)
396 POOLMEM *win32_fname;
397 POOLMEM *win32_fname_wchar;
399 DWORD dwaccess, dwflags, dwshare;
401 /* Convert to Windows path format */
402 win32_fname = get_pool_memory(PM_FNAME);
403 win32_fname_wchar = get_pool_memory(PM_FNAME);
405 unix_name_to_win32(&win32_fname, (char *)fname);
407 if (!(p_CreateFileA || p_CreateFileW))
410 if (p_CreateFileW && p_MultiByteToWideChar)
411 make_win32_path_UTF8_2_wchar(&win32_fname_wchar, fname);
413 if (flags & O_CREAT) { /* Create */
414 if (bfd->use_backup_api) {
415 dwaccess = GENERIC_WRITE|FILE_ALL_ACCESS|WRITE_OWNER|WRITE_DAC|ACCESS_SYSTEM_SECURITY;
416 dwflags = FILE_FLAG_BACKUP_SEMANTICS;
418 dwaccess = GENERIC_WRITE;
422 if (p_CreateFileW && p_MultiByteToWideChar) {
423 // unicode open for create write
424 bfd->fh = p_CreateFileW((LPCWSTR)win32_fname_wchar,
425 dwaccess, /* Requested access */
427 NULL, /* SecurityAttributes */
428 CREATE_ALWAYS, /* CreationDisposition */
429 dwflags, /* Flags and attributes */
430 NULL); /* TemplateFile */
433 bfd->fh = p_CreateFileA(win32_fname,
434 dwaccess, /* Requested access */
436 NULL, /* SecurityAttributes */
437 CREATE_ALWAYS, /* CreationDisposition */
438 dwflags, /* Flags and attributes */
439 NULL); /* TemplateFile */
442 bfd->mode = BF_WRITE;
444 } else if (flags & O_WRONLY) { /* Open existing for write */
445 if (bfd->use_backup_api) {
446 dwaccess = GENERIC_WRITE|WRITE_OWNER|WRITE_DAC;
447 dwflags = FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT;
449 dwaccess = GENERIC_WRITE;
453 if (p_CreateFileW && p_MultiByteToWideChar) {
454 // unicode open for open existing write
455 bfd->fh = p_CreateFileW((LPCWSTR)win32_fname_wchar,
456 dwaccess, /* Requested access */
458 NULL, /* SecurityAttributes */
459 OPEN_EXISTING, /* CreationDisposition */
460 dwflags, /* Flags and attributes */
461 NULL); /* TemplateFile */
464 bfd->fh = p_CreateFileA(win32_fname,
465 dwaccess, /* Requested access */
467 NULL, /* SecurityAttributes */
468 OPEN_EXISTING, /* CreationDisposition */
469 dwflags, /* Flags and attributes */
470 NULL); /* TemplateFile */
474 bfd->mode = BF_WRITE;
477 if (bfd->use_backup_api) {
478 dwaccess = GENERIC_READ|READ_CONTROL|ACCESS_SYSTEM_SECURITY;
479 dwflags = FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_SEQUENTIAL_SCAN |
480 FILE_FLAG_OPEN_REPARSE_POINT;
481 dwshare = FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE;
483 dwaccess = GENERIC_READ;
485 dwshare = FILE_SHARE_READ|FILE_SHARE_WRITE;
488 if (p_CreateFileW && p_MultiByteToWideChar) {
489 // unicode open for open existing read
490 bfd->fh = p_CreateFileW((LPCWSTR)win32_fname_wchar,
491 dwaccess, /* Requested access */
492 dwshare, /* Share modes */
493 NULL, /* SecurityAttributes */
494 OPEN_EXISTING, /* CreationDisposition */
495 dwflags, /* Flags and attributes */
496 NULL); /* TemplateFile */
499 bfd->fh = p_CreateFileA(win32_fname,
500 dwaccess, /* Requested access */
501 dwshare, /* Share modes */
502 NULL, /* SecurityAttributes */
503 OPEN_EXISTING, /* CreationDisposition */
504 dwflags, /* Flags and attributes */
505 NULL); /* TemplateFile */
511 if (bfd->fh == INVALID_HANDLE_VALUE) {
512 bfd->lerror = GetLastError();
513 bfd->berrno = b_errno_win32;
514 errno = b_errno_win32;
515 bfd->mode = BF_CLOSED;
518 bfd->lpContext = NULL;
519 bfd->win32DecompContext.bIsInData = false;
520 bfd->win32DecompContext.liNextHeader = 0;
521 free_pool_memory(win32_fname_wchar);
522 free_pool_memory(win32_fname);
523 return bfd->mode == BF_CLOSED ? -1 : 1;
527 * Returns 0 on success
530 int bclose(BFILE *bfd)
535 free_pool_memory(bfd->errmsg);
538 if (bfd->mode == BF_CLOSED) {
541 if (bfd->use_backup_api && bfd->mode == BF_READ) {
543 if (!bfd->lpContext && !p_BackupRead(bfd->fh,
545 (DWORD)0, /* bytes to read */
546 &bfd->rw_bytes, /* bytes read */
548 1, /* ProcessSecurity */
549 &bfd->lpContext)) { /* Read context */
550 errno = b_errno_win32;
553 } else if (bfd->use_backup_api && bfd->mode == BF_WRITE) {
555 if (!bfd->lpContext && !p_BackupWrite(bfd->fh,
557 (DWORD)0, /* bytes to read */
558 &bfd->rw_bytes, /* bytes written */
560 1, /* ProcessSecurity */
561 &bfd->lpContext)) { /* Write context */
562 errno = b_errno_win32;
566 if (!CloseHandle(bfd->fh)) {
568 errno = b_errno_win32;
570 bfd->mode = BF_CLOSED;
571 bfd->lpContext = NULL;
572 bfd->cmd_plugin = false;
576 /* Returns: bytes read on success
580 ssize_t bread(BFILE *bfd, void *buf, size_t count)
584 if (bfd->use_backup_api) {
585 if (!p_BackupRead(bfd->fh,
590 1, /* Process Security */
591 &bfd->lpContext)) { /* Context */
592 bfd->lerror = GetLastError();
593 bfd->berrno = b_errno_win32;
594 errno = b_errno_win32;
598 if (!ReadFile(bfd->fh,
603 bfd->lerror = GetLastError();
604 bfd->berrno = b_errno_win32;
605 errno = b_errno_win32;
610 return (ssize_t)bfd->rw_bytes;
613 ssize_t bwrite(BFILE *bfd, void *buf, size_t count)
617 if (bfd->use_backup_api) {
618 if (!p_BackupWrite(bfd->fh,
623 1, /* Process Security */
624 &bfd->lpContext)) { /* Context */
625 bfd->lerror = GetLastError();
626 bfd->berrno = b_errno_win32;
627 errno = b_errno_win32;
631 if (!WriteFile(bfd->fh,
636 bfd->lerror = GetLastError();
637 bfd->berrno = b_errno_win32;
638 errno = b_errno_win32;
642 return (ssize_t)bfd->rw_bytes;
645 bool is_bopen(BFILE *bfd)
647 return bfd->mode != BF_CLOSED;
650 boffset_t blseek(BFILE *bfd, boffset_t offset, int whence)
652 LONG offset_low = (LONG)offset;
653 LONG offset_high = (LONG)(offset >> 32);
656 dwResult = SetFilePointer(bfd->fh, offset_low, &offset_high, whence);
658 if (dwResult == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
659 return (boffset_t)-1;
662 return ((boffset_t)offset_high << 32) | dwResult;
665 #else /* Unix systems */
667 /* ===============================================================
671 * ===============================================================
673 void binit(BFILE *bfd)
675 memset(bfd, 0, sizeof(BFILE));
679 bool have_win32_api()
681 return false; /* no can do */
685 * Enables using the Backup API (win32_data).
686 * Returns true if function worked
687 * Returns false if failed (i.e. do not have Backup API on this machine)
689 bool set_win32_backup(BFILE *bfd)
691 return false; /* no can do */
695 bool set_portable_backup(BFILE *bfd)
697 return true; /* no problem */
701 * Return true if we are writing in portable format
702 * return false if not
704 bool is_portable_backup(BFILE *bfd)
706 return true; /* portable by definition */
709 bool set_prog(BFILE *bfd, char *prog, JCR *jcr)
714 bool set_cmd_plugin(BFILE *bfd, JCR *jcr)
716 bfd->cmd_plugin = true;
722 * This code is running on a non-Win32 machine
724 bool is_restore_stream_supported(int stream)
726 /* No Win32 backup on this machine */
729 case STREAM_GZIP_DATA:
730 case STREAM_SPARSE_GZIP_DATA:
731 case STREAM_WIN32_GZIP_DATA:
733 #ifndef HAVE_DARWIN_OS
734 case STREAM_MACOS_FORK_DATA:
735 case STREAM_HFSPLUS_ATTRIBUTES:
741 case STREAM_GZIP_DATA:
742 case STREAM_SPARSE_GZIP_DATA:
743 case STREAM_WIN32_GZIP_DATA:
745 case STREAM_WIN32_DATA:
746 case STREAM_UNIX_ATTRIBUTES:
747 case STREAM_FILE_DATA:
748 case STREAM_MD5_DIGEST:
749 case STREAM_UNIX_ATTRIBUTES_EX:
750 case STREAM_SPARSE_DATA:
751 case STREAM_PROGRAM_NAMES:
752 case STREAM_PROGRAM_DATA:
753 case STREAM_SHA1_DIGEST:
755 case STREAM_SHA256_DIGEST:
756 case STREAM_SHA512_DIGEST:
759 case STREAM_SIGNED_DIGEST:
760 case STREAM_ENCRYPTED_FILE_DATA:
761 case STREAM_ENCRYPTED_FILE_GZIP_DATA:
762 case STREAM_ENCRYPTED_WIN32_DATA:
763 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
765 #ifdef HAVE_DARWIN_OS
766 case STREAM_MACOS_FORK_DATA:
767 case STREAM_HFSPLUS_ATTRIBUTES:
769 case STREAM_ENCRYPTED_MACOS_FORK_DATA:
770 #endif /* HAVE_CRYPTO */
771 #endif /* HAVE_DARWIN_OS */
772 case 0: /* compatibility with old tapes */
779 int bopen(BFILE *bfd, const char *fname, int flags, mode_t mode)
781 if (bfd->cmd_plugin && plugin_bopen) {
782 Dmsg1(000, "call plugin_bopen fname=%s\n", fname);
783 return plugin_bopen(bfd->jcr, fname, flags, mode);
786 /* Normal file open */
787 Dmsg1(100, "open file %s\n", fname);
788 /* We use fnctl to set O_NOATIME if requested to avoid open error */
789 bfd->fid = open(fname, flags & ~O_NOATIME, mode);
790 /* Set O_NOATIME if possible */
791 if (bfd->fid != -1 && flags & O_NOATIME) {
792 int oldflags = fcntl(bfd->fid, F_GETFL, 0);
793 if (oldflags == -1) {
798 int ret = fcntl(bfd->fid, F_SETFL, oldflags | O_NOATIME);
799 /* EPERM means setting O_NOATIME was not allowed */
800 if (ret == -1 && errno != EPERM) {
808 bfd->m_flags = flags;
809 Dmsg1(400, "Open file %d\n", bfd->fid);
812 bfd->win32DecompContext.bIsInData = false;
813 bfd->win32DecompContext.liNextHeader = 0;
815 #if defined(HAVE_POSIX_FADVISE) && defined(POSIX_FADV_WILLNEED)
816 if (bfd->fid != -1 && flags & O_RDONLY) {
817 int stat = posix_fadvise(bfd->fid, 0, 0, POSIX_FADV_WILLNEED);
818 Dmsg2(400, "Did posix_fadvise on %s stat=%d\n", fname, stat);
825 #ifdef HAVE_DARWIN_OS
826 /* Open the resource fork of a file. */
827 int bopen_rsrc(BFILE *bfd, const char *fname, int flags, mode_t mode)
831 rsrc_fname = get_pool_memory(PM_FNAME);
832 pm_strcpy(rsrc_fname, fname);
833 pm_strcat(rsrc_fname, _PATH_RSRCFORKSPEC);
834 bopen(bfd, rsrc_fname, flags, mode);
835 free_pool_memory(rsrc_fname);
841 int bclose(BFILE *bfd)
845 Dmsg1(400, "Close file %d\n", bfd->fid);
847 if (bfd->cmd_plugin && plugin_bclose) {
848 return plugin_bclose(bfd->jcr);
851 if (bfd->fid == -1) {
854 #if defined(HAVE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)
855 if (bfd->m_flags & O_RDONLY) {
856 fdatasync(bfd->fid); /* sync the file */
857 /* Tell OS we don't need it any more */
858 posix_fadvise(bfd->fid, 0, 0, POSIX_FADV_DONTNEED);
862 /* Close normal file */
863 stat = close(bfd->fid);
866 bfd->cmd_plugin = false;
870 ssize_t bread(BFILE *bfd, void *buf, size_t count)
874 if (bfd->cmd_plugin && plugin_bread) {
875 return plugin_bread(bfd->jcr, buf, count);
878 stat = read(bfd->fid, buf, count);
883 ssize_t bwrite(BFILE *bfd, void *buf, size_t count)
887 if (bfd->cmd_plugin && plugin_bwrite) {
888 return plugin_bwrite(bfd->jcr, buf, count);
890 stat = write(bfd->fid, buf, count);
895 bool is_bopen(BFILE *bfd)
897 return bfd->fid >= 0;
900 boffset_t blseek(BFILE *bfd, boffset_t offset, int whence)
904 if (bfd->cmd_plugin && plugin_bwrite) {
905 return plugin_blseek(bfd->jcr, offset, whence);
907 pos = (boffset_t)lseek(bfd->fid, (off_t)offset, whence);