2 * Copyright (C) 1994-1999, Index Data
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.31 1999-02-18 12:49:33 adam
8 * Changed file naming scheme for register files as well as record
11 * Revision 1.30 1999/02/02 14:50:02 adam
12 * Updated WIN32 code specific sections. Changed header.
14 * Revision 1.29 1998/05/27 14:28:34 adam
15 * Fixed bug in mf_write. 'Cap off' byte written at wrong offset.
17 * Revision 1.28 1998/05/20 10:00:35 adam
18 * Fixed register spec so that colon isn't treated as size separator
19 * unless followed by [0-9+-] in order to allow DOS drive specifications.
21 * Revision 1.27 1998/02/10 11:55:07 adam
24 * Revision 1.26 1997/10/27 14:25:38 adam
27 * Revision 1.25 1997/09/18 08:59:16 adam
28 * Extra generic handle for the character mapping routines.
30 * Revision 1.24 1997/09/17 12:19:06 adam
31 * Zebra version corresponds to YAZ version 1.4.
32 * Changed Zebra server so that it doesn't depend on global common_resource.
34 * Revision 1.23 1997/09/09 13:37:53 adam
35 * Partial port to WIN95/NT.
37 * Revision 1.22 1997/09/04 13:56:39 adam
38 * Added O_BINARY to open calls.
40 * Revision 1.21 1996/10/29 13:56:18 adam
41 * Include of zebrautl.h instead of alexutil.h.
43 * Revision 1.20 1996/05/14 12:10:16 quinn
46 * Revision 1.19 1996/05/01 07:16:30 quinn
49 * Revision 1.18 1996/04/09 06:47:30 adam
50 * Function scan_areadef doesn't use sscanf (%n fails on this Linux).
52 * Revision 1.17 1996/03/20 13:29:11 quinn
55 * Revision 1.16 1995/12/12 15:57:57 adam
56 * Implemented mf_unlink. cf_unlink uses mf_unlink.
58 * Revision 1.15 1995/12/08 16:21:14 adam
59 * Work on commit/update.
61 * Revision 1.14 1995/12/05 13:12:37 quinn
64 * Revision 1.13 1995/11/30 17:00:50 adam
65 * Several bug fixes. Commit system runs now.
67 * Revision 1.12 1995/11/24 17:26:11 quinn
68 * Mostly about making some ISAM stuff in the config file optional.
70 * Revision 1.11 1995/11/13 09:32:43 quinn
73 * Revision 1.10 1995/09/04 12:33:22 adam
74 * Various cleanup. YAZ util used instead.
76 * Revision 1.9 1994/11/04 14:26:39 quinn
79 * Revision 1.8 1994/10/05 16:56:42 quinn
82 * Revision 1.7 1994/09/19 14:12:37 quinn
85 * Revision 1.6 1994/09/14 13:10:15 quinn
86 * Corrected some bugs in the init-phase
88 * Revision 1.5 1994/09/12 08:01:51 quinn
91 * Revision 1.4 1994/09/01 14:51:07 quinn
92 * Allowed mf_write to write beyond eof+1.
94 * Revision 1.3 1994/08/24 09:37:17 quinn
95 * Changed reaction to read return values.
97 * Revision 1.2 1994/08/23 14:50:48 quinn
100 * Revision 1.1 1994/08/23 14:41:33 quinn
101 * First functional version.
107 * TODO: The size estimates in init may not be accurate due to
108 * only partially written final blocks.
111 #include <sys/types.h>
125 #include <zebrautl.h>
128 static int scan_areadef(MFile_area ma, const char *name, const char *ad)
131 * If no definition is given, use current directory, unlimited.
133 char dirname[FILENAME_MAX+1];
134 mf_dir **dp = &ma->dirs, *dir = *dp;
140 const char *ad0 = ad;
141 int i = 0, fact = 1, multi, size = 0;
143 while (*ad == ' ' || *ad == '\t')
149 if (*ad == ':' && strchr ("+-0123456789", ad[1]))
151 if (i < FILENAME_MAX)
158 logf (LOG_FATAL, "Missing colon after path: %s", ad0);
163 logf (LOG_FATAL, "Empty path: %s", ad0);
166 while (*ad == ' ' || *ad == '\t')
176 if (*ad < '0' || *ad > '9')
178 logf (LOG_FATAL, "Missing size after path: %s", ad0);
182 while (*ad >= '0' && *ad <= '9')
183 size = size*10 + (*ad++ - '0');
186 case 'B': case 'b': multi = 1; break;
187 case 'K': case 'k': multi = 1024; break;
188 case 'M': case 'm': multi = 1048576; break;
190 logf (LOG_FATAL, "Missing unit: %s", ad0);
193 logf (LOG_FATAL, "Illegal unit: %c in %s", *ad, ad0);
197 *dp = dir = xmalloc(sizeof(mf_dir));
199 strcpy(dir->name, dirname);
200 dir->max_bytes = dir->avail_bytes = fact * size * multi;
206 static int file_position(MFile mf, int pos, int offset)
208 int off = 0, c = mf->cur_file, ps;
210 if ((c > 0 && pos <= mf->files[c-1].top) ||
211 (c < mf->no_files -1 && pos > mf->files[c].top))
214 while (c + 1 < mf->no_files && mf->files[c].top < pos)
216 off += mf->files[c].blocks;
219 assert(c < mf->no_files);
222 off = c ? (mf->files[c-1].top + 1) : 0;
223 if (mf->files[c].fd < 0 && (mf->files[c].fd = open(mf->files[c].path,
224 mf->wr ? (O_BINARY|O_RDWR|O_CREAT) : (O_BINARY|O_RDONLY), 0666)) < 0)
226 if (!mf->wr && errno == ENOENT && off == 0)
228 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", mf->files[c].path);
231 if (lseek(mf->files[c].fd, (ps = pos - off) * mf->blocksize + offset,
234 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s", mf->files[c].path);
241 static int cmp_part_file(const void *p1, const void *p2)
243 return ((part_file *)p1)->number - ((part_file *)p2)->number;
247 * Create a new area, cotaining metafiles in directories.
248 * Find the part-files in each directory, and inventory the existing metafiles.
250 MFile_area mf_init(const char *name, const char *spec)
252 MFile_area ma = xmalloc(sizeof(*ma));
255 part_file *part_f = 0;
259 char metaname[FILENAME_MAX+1], tmpnam[FILENAME_MAX+1];
261 logf (LOG_DEBUG, "mf_init(%s)", name);
262 strcpy(ma->name, name);
265 if (scan_areadef(ma, name, spec) < 0)
267 logf (LOG_FATAL, "Failed to access description of '%s'", name);
270 /* look at each directory */
271 for (dirp = ma->dirs; dirp; dirp = dirp->next)
273 if (!(dd = opendir(dirp->name)))
275 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", dirp->name);
278 /* look at each file */
279 while ((dent = readdir(dd)))
281 if (*dent->d_name == '.')
283 if (sscanf(dent->d_name, "%[^-]-%d.mf", metaname, &number) != 2)
285 logf (LOG_DEBUG, "bf: %s is not a part-file.", dent->d_name);
288 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
291 if (!strcmp(meta_f->name, metaname))
293 part_f = &meta_f->files[meta_f->no_files++];
300 meta_f = xmalloc(sizeof(*meta_f));
302 meta_f->next = ma->mfiles;
304 meta_f->cur_file = -1;
306 strcpy(meta_f->name, metaname);
307 part_f = &meta_f->files[0];
308 meta_f->no_files = 1;
310 part_f->number = number;
313 sprintf(tmpnam, "%s/%s", dirp->name, dent->d_name);
314 part_f->path = xstrdup(tmpnam);
316 if ((fd = open(part_f->path, O_BINARY|O_RDONLY)) < 0)
318 logf (LOG_FATAL|LOG_ERRNO, "Failed to access %s",
322 if ((part_f->bytes = lseek(fd, 0, SEEK_END)) < 0)
324 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s",
329 if (dirp->max_bytes >= 0)
330 dirp->avail_bytes -= part_f->bytes;
334 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
336 logf (LOG_DEBUG, "mf_init: %s consists of %d part(s)", meta_f->name,
338 qsort(meta_f->files, meta_f->no_files, sizeof(part_file),
344 void mf_destroy(MFile_area ma)
362 meta_file *m = meta_f;
364 for (i = 0; i<m->no_files; i++)
366 xfree (m->files[i].path);
368 meta_f = meta_f->next;
376 * If !ma, Use MF_DEFAULT_AREA.
378 MFile mf_open(MFile_area ma, const char *name, int block_size, int wflag)
380 struct meta_file *mnew;
382 char tmp[FILENAME_MAX+1];
385 logf(LOG_DEBUG, "mf_open(%s bs=%d, %s)", name, block_size,
386 wflag ? "RW" : "RDONLY");
388 for (mnew = ma->mfiles; mnew; mnew = mnew->next)
389 if (!strcmp(name, mnew->name))
396 mnew = xmalloc(sizeof(*mnew));
397 strcpy(mnew->name, name);
398 /* allocate one, empty file */
400 mnew->files[0].bytes = mnew->files[0].blocks = 0;
401 mnew->files[0].top = -1;
402 mnew->files[0].number = 0;
403 mnew->files[0].fd = -1;
404 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
405 for (dp = ma->dirs; dp && dp->max_bytes >= 0 && dp->avail_bytes <
406 mnew->min_bytes_creat; dp = dp->next);
409 logf (LOG_FATAL, "Insufficient space for new mfile.");
412 mnew->files[0].dir = dp;
413 sprintf(tmp, "%s/%s-%d.mf", dp->name, mnew->name, 0);
414 mnew->files[0].path = xstrdup(tmp);
416 mnew->next = ma->mfiles;
421 for (i = 0; i < mnew->no_files; i++)
423 if (mnew->files[i].bytes % block_size)
424 mnew->files[i].bytes += block_size - mnew->files[i].bytes %
426 mnew->files[i].blocks = mnew->files[i].bytes / block_size;
430 mnew->blocksize = block_size;
431 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
436 for (i = 0; i < mnew->no_files; i++)
438 mnew->files[i].blocks = mnew->files[i].bytes / mnew->blocksize;
439 if (i == mnew->no_files - 1)
440 mnew->files[i].top = -1;
443 i ? (mnew->files[i-1].top + mnew->files[i].blocks)
444 : (mnew->files[i].blocks - 1);
452 int mf_close(MFile mf)
456 logf (LOG_DEBUG, "mf_close(%s)", mf->name);
458 for (i = 0; i < mf->no_files; i++)
459 if (mf->files[i].fd >= 0)
461 close(mf->files[i].fd);
462 mf->files[i].fd = -1;
469 * Read one block from a metafile. Interface mirrors bfile.
471 int mf_read(MFile mf, int no, int offset, int num, void *buf)
475 if ((rd = file_position(mf, no, offset)) < 0)
480 toread = num ? num : mf->blocksize;
481 if ((rd = read(mf->files[mf->cur_file].fd, buf, toread)) < 0)
483 logf (LOG_FATAL|LOG_ERRNO, "mf_read: Read failed (%s)",
484 mf->files[mf->cur_file].path);
487 else if (rd < toread)
496 int mf_write(MFile mf, int no, int offset, int num, const void *buf)
498 int ps, nblocks, towrite;
500 char tmp[FILENAME_MAX+1];
501 unsigned char dummych = '\xff';
503 if ((ps = file_position(mf, no, offset)) < 0)
505 /* file needs to grow */
506 while (ps >= mf->files[mf->cur_file].blocks)
508 /* file overflow - allocate new file */
509 if (mf->files[mf->cur_file].dir->max_bytes >= 0 &&
510 (ps - mf->files[mf->cur_file].blocks + 1) * mf->blocksize >
511 mf->files[mf->cur_file].dir->avail_bytes)
514 if ((nblocks = mf->files[mf->cur_file].dir->avail_bytes /
517 logf (LOG_DEBUG, "Capping off file %s at pos %d",
518 mf->files[mf->cur_file].path, nblocks);
519 if ((ps = file_position(mf,
520 (mf->cur_file ? mf->files[mf->cur_file-1].top : 0) +
521 mf->files[mf->cur_file].blocks + nblocks - 1, 0)) < 0)
523 logf (LOG_DEBUG, "ps = %d", ps);
524 if (write(mf->files[mf->cur_file].fd, &dummych, 1) < 1)
526 logf (LOG_ERRNO|LOG_FATAL, "write dummy");
529 mf->files[mf->cur_file].blocks += nblocks;
530 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
531 mf->files[mf->cur_file].dir->avail_bytes -= nblocks *
535 logf (LOG_DEBUG, "Creating new file.");
536 for (dp = mf->ma->dirs; dp && dp->max_bytes >= 0 &&
537 dp->avail_bytes < mf->min_bytes_creat; dp = dp->next);
540 logf (LOG_FATAL, "Cannot allocate more space for %s",
544 mf->files[mf->cur_file].top = (mf->cur_file ?
545 mf->files[mf->cur_file-1].top : -1) +
546 mf->files[mf->cur_file].blocks;
547 mf->files[++(mf->cur_file)].top = -1;
548 mf->files[mf->cur_file].dir = dp;
549 mf->files[mf->cur_file].number =
550 mf->files[mf->cur_file-1].number + 1;
551 mf->files[mf->cur_file].blocks =
552 mf->files[mf->cur_file].bytes = 0;
553 mf->files[mf->cur_file].fd = -1;
554 sprintf(tmp, "%s/%s.mf.%d", dp->name, mf->name,
555 mf->files[mf->cur_file].number);
556 mf->files[mf->cur_file].path = xstrdup(tmp);
558 /* open new file and position at beginning */
559 if ((ps = file_position(mf, no, offset)) < 0)
564 nblocks = ps - mf->files[mf->cur_file].blocks + 1;
565 mf->files[mf->cur_file].blocks += nblocks;
566 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
567 if (mf->files[mf->cur_file].dir->max_bytes >= 0)
568 mf->files[mf->cur_file].dir->avail_bytes -=
569 nblocks * mf->blocksize;
572 towrite = num ? num : mf->blocksize;
573 if (write(mf->files[mf->cur_file].fd, buf, towrite) < towrite)
575 logf (LOG_FATAL|LOG_ERRNO, "Write failed for file %s part %d",
576 mf->name, mf->cur_file);
583 * Destroy a metafile, unlinking component files. File must be open.
585 int mf_unlink(MFile mf)
589 for (i = 0; i < mf->no_files; i++)
590 unlink (mf->files[i].path);
595 * Unlink the file by name, rather than MFile-handle. File should be closed.
597 int mf_unlink_name(MFile_area ma, const char *name)