2 * Bacula low level File I/O routines. This routine simulates
3 * open(), read(), write(), and close(), but using native routines.
4 * I.e. on Windows, we use Windows APIs.
6 * Kern Sibbald, April MMIII
12 Bacula® - The Network Backup Solution
14 Copyright (C) 2003-2007 Free Software Foundation Europe e.V.
16 The main author of Bacula is Kern Sibbald, with contributions from
17 many others, a complete list can be found in the file AUTHORS.
18 This program is Free Software; you can redistribute it and/or
19 modify it under the terms of version two of the GNU General Public
20 License as published by the Free Software Foundation and included
23 This program is distributed in the hope that it will be useful, but
24 WITHOUT ANY WARRANTY; without even the implied warranty of
25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 General Public License for more details.
28 You should have received a copy of the GNU General Public License
29 along with this program; if not, write to the Free Software
30 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
33 Bacula® is a registered trademark of John Walker.
34 The licensor of Bacula is the Free Software Foundation Europe
35 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
36 Switzerland, email:ftf@fsfeurope.org.
42 bool (*python_set_prog)(JCR *jcr, const char *prog) = NULL;
43 int (*python_open)(BFILE *bfd, const char *fname, int flags, mode_t mode) = NULL;
44 int (*python_close)(BFILE *bfd) = NULL;
45 ssize_t (*python_read)(BFILE *bfd, void *buf, size_t count) = NULL;
46 ssize_t (*python_write)(BFILE *bfd, void *buf, size_t count) = NULL;
49 #include <sys/paths.h>
52 #if !defined(HAVE_FDATASYNC)
57 /* ===============================================================
59 * U N I X AND W I N D O W S
61 * ===============================================================
64 bool is_win32_stream(int stream)
67 case STREAM_WIN32_DATA:
68 case STREAM_WIN32_GZIP_DATA:
69 case STREAM_ENCRYPTED_WIN32_DATA:
70 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
76 const char *stream_to_ascii(int stream)
81 case STREAM_UNIX_ATTRIBUTES:
82 return _("Unix attributes");
83 case STREAM_FILE_DATA:
84 return _("File data");
85 case STREAM_MD5_DIGEST:
86 return _("MD5 digest");
87 case STREAM_GZIP_DATA:
88 return _("GZIP data");
89 case STREAM_UNIX_ATTRIBUTES_EX:
90 return _("Extended attributes");
91 case STREAM_SPARSE_DATA:
92 return _("Sparse data");
93 case STREAM_SPARSE_GZIP_DATA:
94 return _("GZIP sparse data");
95 case STREAM_PROGRAM_NAMES:
96 return _("Program names");
97 case STREAM_PROGRAM_DATA:
98 return _("Program data");
99 case STREAM_SHA1_DIGEST:
100 return _("SHA1 digest");
101 case STREAM_WIN32_DATA:
102 return _("Win32 data");
103 case STREAM_WIN32_GZIP_DATA:
104 return _("Win32 GZIP data");
105 case STREAM_MACOS_FORK_DATA:
106 return _("MacOS Fork data");
107 case STREAM_HFSPLUS_ATTRIBUTES:
108 return _("HFS+ attribs");
109 case STREAM_UNIX_ATTRIBUTES_ACCESS_ACL:
110 return _("Standard Unix ACL attribs");
111 case STREAM_UNIX_ATTRIBUTES_DEFAULT_ACL:
112 return _("Default Unix ACL attribs");
113 case STREAM_SHA256_DIGEST:
114 return _("SHA256 digest");
115 case STREAM_SHA512_DIGEST:
116 return _("SHA512 digest");
117 case STREAM_SIGNED_DIGEST:
118 return _("Signed digest");
119 case STREAM_ENCRYPTED_FILE_DATA:
120 return _("Encrypted File data");
121 case STREAM_ENCRYPTED_WIN32_DATA:
122 return _("Encrypted Win32 data");
123 case STREAM_ENCRYPTED_SESSION_DATA:
124 return _("Encrypted session data");
125 case STREAM_ENCRYPTED_FILE_GZIP_DATA:
126 return _("Encrypted GZIP data");
127 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
128 return _("Encrypted Win32 GZIP data");
129 case STREAM_ENCRYPTED_MACOS_FORK_DATA:
130 return _("Encrypted MacOS fork data");
132 sprintf(buf, "%d", stream);
133 return (const char *)buf;
138 void int64_LE2BE(int64_t* pBE, const int64_t v)
140 /* convert little endian to big endian */
141 if (htonl(1) != 1L) { /* no work if on little endian machine */
142 memcpy(pBE, &v, sizeof(int64_t));
145 uint8_t rv[sizeof(int64_t)];
146 uint8_t *pv = (uint8_t *) &v;
148 for (i = 0; i < 8; i++) {
151 memcpy(pBE, &rv, sizeof(int64_t));
156 void int32_LE2BE(int32_t* pBE, const int32_t v)
158 /* convert little endian to big endian */
159 if (htonl(1) != 1L) { /* no work if on little endian machine */
160 memcpy(pBE, &v, sizeof(int32_t));
163 uint8_t rv[sizeof(int32_t)];
164 uint8_t *pv = (uint8_t *) &v;
166 for (i = 0; i < 4; i++) {
169 memcpy(pBE, &rv, sizeof(int32_t));
174 bool processWin32BackupAPIBlock (BFILE *bfd, void *pBuffer, ssize_t dwSize)
176 /* pByte contains the buffer
177 dwSize the len to be processed. function assumes to be
178 called in successive incremental order over the complete
179 BackupRead stream beginning at pos 0 and ending at the end.
182 PROCESS_WIN32_BACKUPAPIBLOCK_CONTEXT* pContext = &(bfd->win32DecompContext);
183 bool bContinue = false;
184 int64_t dwDataOffset = 0;
187 /* Win32 Stream Header size without name of stream.
188 * = sizeof (WIN32_STREAM_ID)- sizeof(WCHAR*);
190 int32_t dwSizeHeader = 20;
193 if (pContext->liNextHeader >= dwSize) {
194 dwDataLen = dwSize-dwDataOffset;
195 bContinue = false; /* 1 iteration is enough */
197 dwDataLen = pContext->liNextHeader-dwDataOffset;
198 bContinue = true; /* multiple iterations may be necessary */
202 /* copy block of real DATA */
203 if (pContext->bIsInData) {
204 if (bwrite(bfd, ((char *)pBuffer)+dwDataOffset, dwDataLen) != (ssize_t)dwDataLen)
208 if (pContext->liNextHeader < dwSize) {/* is a header in this block ? */
209 int32_t dwOffsetTarget;
210 int32_t dwOffsetSource;
212 if (pContext->liNextHeader < 0) {
213 /* start of header was before this block, so we
214 * continue with the part in the current block
216 dwOffsetTarget = -pContext->liNextHeader;
219 /* start of header is inside of this block */
221 dwOffsetSource = pContext->liNextHeader;
224 int32_t dwHeaderPartLen = dwSizeHeader-dwOffsetTarget;
225 bool bHeaderIsComplete;
227 if (dwHeaderPartLen <= dwSize-dwOffsetSource) {
228 /* header (or rest of header) is completely available
231 bHeaderIsComplete = true;
233 /* header will continue in next block */
234 bHeaderIsComplete = false;
235 dwHeaderPartLen = dwSize-dwOffsetSource;
238 /* copy the available portion of header to persistent copy */
239 memcpy(((char *)&pContext->header_stream)+dwOffsetTarget, ((char *)pBuffer)+dwOffsetSource, dwHeaderPartLen);
241 /* recalculate position of next header */
242 if (bHeaderIsComplete) {
243 /* convert stream name size (32 bit little endian) to machine type */
245 int32_LE2BE (&dwNameSize, pContext->header_stream.dwStreamNameSize);
246 dwDataOffset = dwNameSize+pContext->liNextHeader+dwSizeHeader;
248 /* convert stream size (64 bit little endian) to machine type */
249 int64_LE2BE (&(pContext->liNextHeader), pContext->header_stream.Size);
250 pContext->liNextHeader += dwDataOffset;
252 pContext->bIsInData = pContext->header_stream.dwStreamId == WIN32_BACKUP_DATA;
253 if (dwDataOffset == dwSize)
256 /* stop and continue with next block */
258 pContext->bIsInData = false;
263 /* set "NextHeader" relative to the beginning of the next block */
264 pContext->liNextHeader-= dwSize;
271 /* ===============================================================
275 * ===============================================================
278 #if defined(HAVE_WIN32)
280 void unix_name_to_win32(POOLMEM **win32_name, char *name);
281 extern "C" HANDLE get_osfhandle(int fd);
284 void binit(BFILE *bfd)
286 memset(bfd, 0, sizeof(BFILE));
288 bfd->mode = BF_CLOSED;
289 bfd->use_backup_api = have_win32_api();
293 * Enables using the Backup API (win32_data).
294 * Returns 1 if function worked
295 * Returns 0 if failed (i.e. do not have Backup API on this machine)
297 bool set_win32_backup(BFILE *bfd)
299 /* We enable if possible here */
300 bfd->use_backup_api = have_win32_api();
301 return bfd->use_backup_api;
305 bool set_portable_backup(BFILE *bfd)
307 bfd->use_backup_api = false;
311 bool set_prog(BFILE *bfd, char *prog, JCR *jcr)
319 * Return 1 if we are NOT using Win32 BackupWrite()
322 bool is_portable_backup(BFILE *bfd)
324 return !bfd->use_backup_api;
327 bool have_win32_api()
329 return p_BackupRead && p_BackupWrite;
334 * Return true if we support the stream
335 * false if we do not support the stream
337 * This code is running under Win32, so we
338 * do not need #ifdef on MACOS ...
340 bool is_restore_stream_supported(int stream)
344 /* Streams known not to be supported */
346 case STREAM_GZIP_DATA:
347 case STREAM_SPARSE_GZIP_DATA:
348 case STREAM_WIN32_GZIP_DATA:
350 case STREAM_MACOS_FORK_DATA:
351 case STREAM_HFSPLUS_ATTRIBUTES:
352 case STREAM_ENCRYPTED_MACOS_FORK_DATA:
357 case STREAM_GZIP_DATA:
358 case STREAM_SPARSE_GZIP_DATA:
359 case STREAM_WIN32_GZIP_DATA:
361 case STREAM_WIN32_DATA:
362 case STREAM_UNIX_ATTRIBUTES:
363 case STREAM_FILE_DATA:
364 case STREAM_MD5_DIGEST:
365 case STREAM_UNIX_ATTRIBUTES_EX:
366 case STREAM_SPARSE_DATA:
367 case STREAM_PROGRAM_NAMES:
368 case STREAM_PROGRAM_DATA:
369 case STREAM_SHA1_DIGEST:
371 case STREAM_SHA256_DIGEST:
372 case STREAM_SHA512_DIGEST:
375 case STREAM_SIGNED_DIGEST:
376 case STREAM_ENCRYPTED_FILE_DATA:
377 case STREAM_ENCRYPTED_FILE_GZIP_DATA:
378 case STREAM_ENCRYPTED_WIN32_DATA:
379 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
381 case 0: /* compatibility with old tapes */
387 HANDLE bget_handle(BFILE *bfd)
392 int bopen(BFILE *bfd, const char *fname, int flags, mode_t mode)
394 POOLMEM *win32_fname;
395 POOLMEM *win32_fname_wchar;
397 DWORD dwaccess, dwflags, dwshare;
399 /* Convert to Windows path format */
400 win32_fname = get_pool_memory(PM_FNAME);
401 win32_fname_wchar = get_pool_memory(PM_FNAME);
403 unix_name_to_win32(&win32_fname, (char *)fname);
405 if (!(p_CreateFileA || p_CreateFileW))
408 if (p_CreateFileW && p_MultiByteToWideChar)
409 make_win32_path_UTF8_2_wchar(&win32_fname_wchar, fname);
411 if (flags & O_CREAT) { /* Create */
412 if (bfd->use_backup_api) {
413 dwaccess = GENERIC_WRITE|FILE_ALL_ACCESS|WRITE_OWNER|WRITE_DAC|ACCESS_SYSTEM_SECURITY;
414 dwflags = FILE_FLAG_BACKUP_SEMANTICS;
416 dwaccess = GENERIC_WRITE;
420 // unicode or ascii open for create write
421 if (p_CreateFileW && p_MultiByteToWideChar) {
422 bfd->fh = p_CreateFileW((LPCWSTR)win32_fname_wchar,
423 dwaccess, /* Requested access */
425 NULL, /* SecurityAttributes */
426 CREATE_ALWAYS, /* CreationDisposition */
427 dwflags, /* Flags and attributes */
428 NULL); /* TemplateFile */
430 bfd->fh = p_CreateFileA(win32_fname,
431 dwaccess, /* Requested access */
433 NULL, /* SecurityAttributes */
434 CREATE_ALWAYS, /* CreationDisposition */
435 dwflags, /* Flags and attributes */
436 NULL); /* TemplateFile */
439 bfd->mode = BF_WRITE;
441 } else if (flags & O_WRONLY) { /* Open existing for write */
442 if (bfd->use_backup_api) {
443 dwaccess = GENERIC_WRITE|WRITE_OWNER|WRITE_DAC;
444 dwflags = FILE_FLAG_BACKUP_SEMANTICS;
446 dwaccess = GENERIC_WRITE;
450 // unicode or ascii open for open existing write
451 if (p_CreateFileW && p_MultiByteToWideChar) {
452 bfd->fh = p_CreateFileW((LPCWSTR)win32_fname_wchar,
453 dwaccess, /* Requested access */
455 NULL, /* SecurityAttributes */
456 OPEN_EXISTING, /* CreationDisposition */
457 dwflags, /* Flags and attributes */
458 NULL); /* TemplateFile */
460 bfd->fh = p_CreateFileA(win32_fname,
461 dwaccess, /* Requested access */
463 NULL, /* SecurityAttributes */
464 OPEN_EXISTING, /* CreationDisposition */
465 dwflags, /* Flags and attributes */
466 NULL); /* TemplateFile */
470 bfd->mode = BF_WRITE;
473 if (bfd->use_backup_api) {
474 dwaccess = GENERIC_READ|READ_CONTROL|ACCESS_SYSTEM_SECURITY;
475 dwflags = FILE_FLAG_BACKUP_SEMANTICS;
476 dwshare = FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE;
478 dwaccess = GENERIC_READ;
480 dwshare = FILE_SHARE_READ|FILE_SHARE_WRITE;
483 // unicode or ascii open for open existing read
484 if (p_CreateFileW && p_MultiByteToWideChar) {
485 bfd->fh = p_CreateFileW((LPCWSTR)win32_fname_wchar,
486 dwaccess, /* Requested access */
487 dwshare, /* Share modes */
488 NULL, /* SecurityAttributes */
489 OPEN_EXISTING, /* CreationDisposition */
490 dwflags, /* Flags and attributes */
491 NULL); /* TemplateFile */
493 bfd->fh = p_CreateFileA(win32_fname,
494 dwaccess, /* Requested access */
495 dwshare, /* Share modes */
496 NULL, /* SecurityAttributes */
497 OPEN_EXISTING, /* CreationDisposition */
498 dwflags, /* Flags and attributes */
499 NULL); /* TemplateFile */
505 if (bfd->fh == INVALID_HANDLE_VALUE) {
506 bfd->lerror = GetLastError();
507 bfd->berrno = b_errno_win32;
508 errno = b_errno_win32;
509 bfd->mode = BF_CLOSED;
512 bfd->lpContext = NULL;
513 bfd->win32DecompContext.bIsInData = false;
514 bfd->win32DecompContext.liNextHeader = 0;
515 free_pool_memory(win32_fname_wchar);
516 free_pool_memory(win32_fname);
517 return bfd->mode == BF_CLOSED ? -1 : 1;
521 * Returns 0 on success
524 int bclose(BFILE *bfd)
529 free_pool_memory(bfd->errmsg);
532 if (bfd->mode == BF_CLOSED) {
535 if (bfd->use_backup_api && bfd->mode == BF_READ) {
537 if (!bfd->lpContext && !p_BackupRead(bfd->fh,
539 (DWORD)0, /* bytes to read */
540 &bfd->rw_bytes, /* bytes read */
542 1, /* ProcessSecurity */
543 &bfd->lpContext)) { /* Read context */
544 errno = b_errno_win32;
547 } else if (bfd->use_backup_api && bfd->mode == BF_WRITE) {
549 if (!bfd->lpContext && !p_BackupWrite(bfd->fh,
551 (DWORD)0, /* bytes to read */
552 &bfd->rw_bytes, /* bytes written */
554 1, /* ProcessSecurity */
555 &bfd->lpContext)) { /* Write context */
556 errno = b_errno_win32;
560 if (!CloseHandle(bfd->fh)) {
562 errno = b_errno_win32;
564 bfd->mode = BF_CLOSED;
565 bfd->lpContext = NULL;
569 /* Returns: bytes read on success
573 ssize_t bread(BFILE *bfd, void *buf, size_t count)
577 if (bfd->use_backup_api) {
578 if (!p_BackupRead(bfd->fh,
583 1, /* Process Security */
584 &bfd->lpContext)) { /* Context */
585 bfd->lerror = GetLastError();
586 bfd->berrno = b_errno_win32;
587 errno = b_errno_win32;
591 if (!ReadFile(bfd->fh,
596 bfd->lerror = GetLastError();
597 bfd->berrno = b_errno_win32;
598 errno = b_errno_win32;
603 return (ssize_t)bfd->rw_bytes;
606 ssize_t bwrite(BFILE *bfd, void *buf, size_t count)
610 if (bfd->use_backup_api) {
611 if (!p_BackupWrite(bfd->fh,
616 1, /* Process Security */
617 &bfd->lpContext)) { /* Context */
618 bfd->lerror = GetLastError();
619 bfd->berrno = b_errno_win32;
620 errno = b_errno_win32;
624 if (!WriteFile(bfd->fh,
629 bfd->lerror = GetLastError();
630 bfd->berrno = b_errno_win32;
631 errno = b_errno_win32;
635 return (ssize_t)bfd->rw_bytes;
638 bool is_bopen(BFILE *bfd)
640 return bfd->mode != BF_CLOSED;
643 boffset_t blseek(BFILE *bfd, boffset_t offset, int whence)
645 LONG offset_low = (LONG)offset;
646 LONG offset_high = (LONG)(offset >> 32);
649 dwResult = SetFilePointer(bfd->fh, offset_low, &offset_high, whence);
651 if (dwResult == INVALID_SET_FILE_POINTER && GetLastError() != NO_ERROR) {
652 return (boffset_t)-1;
655 return ((boffset_t)offset_high << 32) | dwResult;
658 #else /* Unix systems */
660 /* ===============================================================
664 * ===============================================================
666 void binit(BFILE *bfd)
668 memset(bfd, 0, sizeof(BFILE));
672 bool have_win32_api()
674 return false; /* no can do */
678 * Enables using the Backup API (win32_data).
679 * Returns true if function worked
680 * Returns false if failed (i.e. do not have Backup API on this machine)
682 bool set_win32_backup(BFILE *bfd)
684 return false; /* no can do */
688 bool set_portable_backup(BFILE *bfd)
690 return true; /* no problem */
694 * Return true if we are writing in portable format
695 * return false if not
697 bool is_portable_backup(BFILE *bfd)
699 return true; /* portable by definition */
702 bool set_prog(BFILE *bfd, char *prog, JCR *jcr)
705 if (bfd->prog && strcmp(prog, bfd->prog) == 0) {
706 return true; /* already setup */
709 if (python_set_prog(jcr, prog)) {
710 Dmsg1(000, "Set prog=%s\n", prog);
716 Dmsg0(000, "No prog set\n");
723 * This code is running on a non-Win32 machine
725 bool is_restore_stream_supported(int stream)
727 /* No Win32 backup on this machine */
730 case STREAM_GZIP_DATA:
731 case STREAM_SPARSE_GZIP_DATA:
732 case STREAM_WIN32_GZIP_DATA:
734 #ifndef HAVE_DARWIN_OS
735 case STREAM_MACOS_FORK_DATA:
736 case STREAM_HFSPLUS_ATTRIBUTES:
742 case STREAM_GZIP_DATA:
743 case STREAM_SPARSE_GZIP_DATA:
744 case STREAM_WIN32_GZIP_DATA:
746 case STREAM_WIN32_DATA:
747 case STREAM_UNIX_ATTRIBUTES:
748 case STREAM_FILE_DATA:
749 case STREAM_MD5_DIGEST:
750 case STREAM_UNIX_ATTRIBUTES_EX:
751 case STREAM_SPARSE_DATA:
752 case STREAM_PROGRAM_NAMES:
753 case STREAM_PROGRAM_DATA:
754 case STREAM_SHA1_DIGEST:
756 case STREAM_SHA256_DIGEST:
757 case STREAM_SHA512_DIGEST:
760 case STREAM_SIGNED_DIGEST:
761 case STREAM_ENCRYPTED_FILE_DATA:
762 case STREAM_ENCRYPTED_FILE_GZIP_DATA:
763 case STREAM_ENCRYPTED_WIN32_DATA:
764 case STREAM_ENCRYPTED_WIN32_GZIP_DATA:
766 #ifdef HAVE_DARWIN_OS
767 case STREAM_MACOS_FORK_DATA:
768 case STREAM_HFSPLUS_ATTRIBUTES:
770 case STREAM_ENCRYPTED_MACOS_FORK_DATA:
771 #endif /* HAVE_CRYPTO */
772 #endif /* HAVE_DARWIN_OS */
773 case 0: /* compatibility with old tapes */
780 int bopen(BFILE *bfd, const char *fname, int flags, mode_t mode)
782 /* Open reader/writer program */
784 Dmsg1(000, "Open file %d\n", bfd->fid);
785 return python_open(bfd, fname, flags, mode);
788 /* Normal file open */
789 Dmsg1(400, "open file %s\n", fname);
790 /* We use fnctl to set O_NOATIME if requested to avoid open error */
791 bfd->fid = open(fname, flags & ~O_NOATIME, mode);
792 /* Set O_NOATIME if possible */
793 if (bfd->fid != -1 && flags & O_NOATIME) {
794 int oldflags = fcntl(bfd->fid, F_GETFL, 0);
795 if (oldflags == -1) {
800 int ret = fcntl(bfd->fid, F_SETFL, oldflags | O_NOATIME);
801 /* EPERM means setting O_NOATIME was not allowed */
802 if (ret == -1 && errno != EPERM) {
810 bfd->m_flags = flags;
811 Dmsg1(400, "Open file %d\n", bfd->fid);
814 bfd->win32DecompContext.bIsInData = false;
815 bfd->win32DecompContext.liNextHeader = 0;
817 #if defined(HAVE_POSIX_FADVISE) && defined(POSIX_FADV_WILLNEED)
818 if (bfd->fid != -1 && flags & O_RDONLY) {
819 int stat = posix_fadvise(bfd->fid, 0, 0, POSIX_FADV_WILLNEED);
820 Dmsg2(400, "Did posix_fadvise on %s stat=%d\n", fname, stat);
827 #ifdef HAVE_DARWIN_OS
828 /* Open the resource fork of a file. */
829 int bopen_rsrc(BFILE *bfd, const char *fname, int flags, mode_t mode)
833 rsrc_fname = get_pool_memory(PM_FNAME);
834 pm_strcpy(rsrc_fname, fname);
835 pm_strcat(rsrc_fname, _PATH_RSRCFORKSPEC);
836 bopen(bfd, rsrc_fname, flags, mode);
837 free_pool_memory(rsrc_fname);
843 int bclose(BFILE *bfd)
847 Dmsg1(400, "Close file %d\n", bfd->fid);
849 /* Close reader/writer program */
851 return python_close(bfd);
854 if (bfd->fid == -1) {
857 #if defined(HAVE_POSIX_FADVISE) && defined(POSIX_FADV_DONTNEED)
858 if (bfd->m_flags & O_RDONLY) {
859 fdatasync(bfd->fid); /* sync the file */
860 /* Tell OS we don't need it any more */
861 posix_fadvise(bfd->fid, 0, 0, POSIX_FADV_DONTNEED);
865 /* Close normal file */
866 stat = close(bfd->fid);
872 ssize_t bread(BFILE *bfd, void *buf, size_t count)
877 return python_read(bfd, buf, count);
879 stat = read(bfd->fid, buf, count);
884 ssize_t bwrite(BFILE *bfd, void *buf, size_t count)
889 return python_write(bfd, buf, count);
891 stat = write(bfd->fid, buf, count);
896 bool is_bopen(BFILE *bfd)
898 return bfd->fid >= 0;
901 boffset_t blseek(BFILE *bfd, boffset_t offset, int whence)
904 pos = (boffset_t)lseek(bfd->fid, (off_t)offset, whence);