2 * Copyright (C) 1994-1999, Index Data
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.33 1999-05-12 13:08:06 adam
8 * First version of ISAMS.
10 * Revision 1.32 1999/04/28 14:53:07 adam
11 * Fixed stupid bug regarding split-files.
13 * Revision 1.31 1999/02/18 12:49:33 adam
14 * Changed file naming scheme for register files as well as record
17 * Revision 1.30 1999/02/02 14:50:02 adam
18 * Updated WIN32 code specific sections. Changed header.
20 * Revision 1.29 1998/05/27 14:28:34 adam
21 * Fixed bug in mf_write. 'Cap off' byte written at wrong offset.
23 * Revision 1.28 1998/05/20 10:00:35 adam
24 * Fixed register spec so that colon isn't treated as size separator
25 * unless followed by [0-9+-] in order to allow DOS drive specifications.
27 * Revision 1.27 1998/02/10 11:55:07 adam
30 * Revision 1.26 1997/10/27 14:25:38 adam
33 * Revision 1.25 1997/09/18 08:59:16 adam
34 * Extra generic handle for the character mapping routines.
36 * Revision 1.24 1997/09/17 12:19:06 adam
37 * Zebra version corresponds to YAZ version 1.4.
38 * Changed Zebra server so that it doesn't depend on global common_resource.
40 * Revision 1.23 1997/09/09 13:37:53 adam
41 * Partial port to WIN95/NT.
43 * Revision 1.22 1997/09/04 13:56:39 adam
44 * Added O_BINARY to open calls.
46 * Revision 1.21 1996/10/29 13:56:18 adam
47 * Include of zebrautl.h instead of alexutil.h.
49 * Revision 1.20 1996/05/14 12:10:16 quinn
52 * Revision 1.19 1996/05/01 07:16:30 quinn
55 * Revision 1.18 1996/04/09 06:47:30 adam
56 * Function scan_areadef doesn't use sscanf (%n fails on this Linux).
58 * Revision 1.17 1996/03/20 13:29:11 quinn
61 * Revision 1.16 1995/12/12 15:57:57 adam
62 * Implemented mf_unlink. cf_unlink uses mf_unlink.
64 * Revision 1.15 1995/12/08 16:21:14 adam
65 * Work on commit/update.
67 * Revision 1.14 1995/12/05 13:12:37 quinn
70 * Revision 1.13 1995/11/30 17:00:50 adam
71 * Several bug fixes. Commit system runs now.
73 * Revision 1.12 1995/11/24 17:26:11 quinn
74 * Mostly about making some ISAM stuff in the config file optional.
76 * Revision 1.11 1995/11/13 09:32:43 quinn
79 * Revision 1.10 1995/09/04 12:33:22 adam
80 * Various cleanup. YAZ util used instead.
82 * Revision 1.9 1994/11/04 14:26:39 quinn
85 * Revision 1.8 1994/10/05 16:56:42 quinn
88 * Revision 1.7 1994/09/19 14:12:37 quinn
91 * Revision 1.6 1994/09/14 13:10:15 quinn
92 * Corrected some bugs in the init-phase
94 * Revision 1.5 1994/09/12 08:01:51 quinn
97 * Revision 1.4 1994/09/01 14:51:07 quinn
98 * Allowed mf_write to write beyond eof+1.
100 * Revision 1.3 1994/08/24 09:37:17 quinn
101 * Changed reaction to read return values.
103 * Revision 1.2 1994/08/23 14:50:48 quinn
106 * Revision 1.1 1994/08/23 14:41:33 quinn
107 * First functional version.
113 * TODO: The size estimates in init may not be accurate due to
114 * only partially written final blocks.
117 #include <sys/types.h>
131 #include <zebrautl.h>
134 static int scan_areadef(MFile_area ma, const char *name, const char *ad)
137 * If no definition is given, use current directory, unlimited.
139 char dirname[FILENAME_MAX+1];
140 mf_dir **dp = &ma->dirs, *dir = *dp;
146 const char *ad0 = ad;
147 int i = 0, fact = 1, multi, size = 0;
149 while (*ad == ' ' || *ad == '\t')
155 if (*ad == ':' && strchr ("+-0123456789", ad[1]))
157 if (i < FILENAME_MAX)
164 logf (LOG_FATAL, "Missing colon after path: %s", ad0);
169 logf (LOG_FATAL, "Empty path: %s", ad0);
172 while (*ad == ' ' || *ad == '\t')
182 if (*ad < '0' || *ad > '9')
184 logf (LOG_FATAL, "Missing size after path: %s", ad0);
188 while (*ad >= '0' && *ad <= '9')
189 size = size*10 + (*ad++ - '0');
192 case 'B': case 'b': multi = 1; break;
193 case 'K': case 'k': multi = 1024; break;
194 case 'M': case 'm': multi = 1048576; break;
196 logf (LOG_FATAL, "Missing unit: %s", ad0);
199 logf (LOG_FATAL, "Illegal unit: %c in %s", *ad, ad0);
203 *dp = dir = xmalloc(sizeof(mf_dir));
205 strcpy(dir->name, dirname);
206 dir->max_bytes = dir->avail_bytes = fact * size * multi;
212 static int file_position(MFile mf, int pos, int offset)
214 int off = 0, c = mf->cur_file, ps;
216 if ((c > 0 && pos <= mf->files[c-1].top) ||
217 (c < mf->no_files -1 && pos > mf->files[c].top))
220 while (c + 1 < mf->no_files && mf->files[c].top < pos)
222 off += mf->files[c].blocks;
225 assert(c < mf->no_files);
228 off = c ? (mf->files[c-1].top + 1) : 0;
229 if (mf->files[c].fd < 0 && (mf->files[c].fd = open(mf->files[c].path,
230 mf->wr ? (O_BINARY|O_RDWR|O_CREAT) : (O_BINARY|O_RDONLY), 0666)) < 0)
232 if (!mf->wr && errno == ENOENT && off == 0)
234 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", mf->files[c].path);
237 if (lseek(mf->files[c].fd, (ps = pos - off) * mf->blocksize + offset,
240 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s", mf->files[c].path);
247 static int cmp_part_file(const void *p1, const void *p2)
249 return ((part_file *)p1)->number - ((part_file *)p2)->number;
253 * Create a new area, cotaining metafiles in directories.
254 * Find the part-files in each directory, and inventory the existing metafiles.
256 MFile_area mf_init(const char *name, const char *spec)
258 MFile_area ma = xmalloc(sizeof(*ma));
261 part_file *part_f = 0;
265 char metaname[FILENAME_MAX+1], tmpnam[FILENAME_MAX+1];
267 logf (LOG_DEBUG, "mf_init(%s)", name);
268 strcpy(ma->name, name);
271 if (scan_areadef(ma, name, spec) < 0)
273 logf (LOG_FATAL, "Failed to access description of '%s'", name);
276 /* look at each directory */
277 for (dirp = ma->dirs; dirp; dirp = dirp->next)
279 if (!(dd = opendir(dirp->name)))
281 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", dirp->name);
284 /* look at each file */
285 while ((dent = readdir(dd)))
287 if (*dent->d_name == '.')
289 if (sscanf(dent->d_name, "%[^-]-%d.mf", metaname, &number) != 2)
291 logf (LOG_DEBUG, "bf: %s is not a part-file.", dent->d_name);
294 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
297 if (!strcmp(meta_f->name, metaname))
299 part_f = &meta_f->files[meta_f->no_files++];
306 meta_f = xmalloc(sizeof(*meta_f));
308 meta_f->next = ma->mfiles;
310 meta_f->cur_file = -1;
312 strcpy(meta_f->name, metaname);
313 part_f = &meta_f->files[0];
314 meta_f->no_files = 1;
316 part_f->number = number;
319 sprintf(tmpnam, "%s/%s", dirp->name, dent->d_name);
320 part_f->path = xstrdup(tmpnam);
322 if ((fd = open(part_f->path, O_BINARY|O_RDONLY)) < 0)
324 logf (LOG_FATAL|LOG_ERRNO, "Failed to access %s",
328 if ((part_f->bytes = lseek(fd, 0, SEEK_END)) < 0)
330 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s",
335 if (dirp->max_bytes >= 0)
336 dirp->avail_bytes -= part_f->bytes;
340 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
342 logf (LOG_DEBUG, "mf_init: %s consists of %d part(s)", meta_f->name,
344 qsort(meta_f->files, meta_f->no_files, sizeof(part_file),
350 void mf_destroy(MFile_area ma)
368 meta_file *m = meta_f;
370 for (i = 0; i<m->no_files; i++)
372 xfree (m->files[i].path);
374 meta_f = meta_f->next;
382 * If !ma, Use MF_DEFAULT_AREA.
384 MFile mf_open(MFile_area ma, const char *name, int block_size, int wflag)
386 struct meta_file *mnew;
388 char tmp[FILENAME_MAX+1];
391 logf(LOG_DEBUG, "mf_open(%s bs=%d, %s)", name, block_size,
392 wflag ? "RW" : "RDONLY");
394 for (mnew = ma->mfiles; mnew; mnew = mnew->next)
395 if (!strcmp(name, mnew->name))
404 mnew = xmalloc(sizeof(*mnew));
405 strcpy(mnew->name, name);
406 /* allocate one, empty file */
408 mnew->files[0].bytes = mnew->files[0].blocks = 0;
409 mnew->files[0].top = -1;
410 mnew->files[0].number = 0;
411 mnew->files[0].fd = -1;
412 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
413 for (dp = ma->dirs; dp && dp->max_bytes >= 0 && dp->avail_bytes <
414 mnew->min_bytes_creat; dp = dp->next);
417 logf (LOG_FATAL, "Insufficient space for new mfile.");
420 mnew->files[0].dir = dp;
421 sprintf(tmp, "%s/%s-%d.mf", dp->name, mnew->name, 0);
422 mnew->files[0].path = xstrdup(tmp);
424 mnew->next = ma->mfiles;
429 for (i = 0; i < mnew->no_files; i++)
431 if (mnew->files[i].bytes % block_size)
432 mnew->files[i].bytes += block_size - mnew->files[i].bytes %
434 mnew->files[i].blocks = mnew->files[i].bytes / block_size;
438 mnew->blocksize = block_size;
439 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
444 for (i = 0; i < mnew->no_files; i++)
446 mnew->files[i].blocks = mnew->files[i].bytes / mnew->blocksize;
447 if (i == mnew->no_files - 1)
448 mnew->files[i].top = -1;
451 i ? (mnew->files[i-1].top + mnew->files[i].blocks)
452 : (mnew->files[i].blocks - 1);
460 int mf_close(MFile mf)
464 logf (LOG_DEBUG, "mf_close(%s)", mf->name);
466 for (i = 0; i < mf->no_files; i++)
467 if (mf->files[i].fd >= 0)
469 close(mf->files[i].fd);
470 mf->files[i].fd = -1;
477 * Read one block from a metafile. Interface mirrors bfile.
479 int mf_read(MFile mf, int no, int offset, int nbytes, void *buf)
483 if ((rd = file_position(mf, no, offset)) < 0)
490 toread = nbytes ? nbytes : mf->blocksize;
491 if ((rd = read(mf->files[mf->cur_file].fd, buf, toread)) < 0)
493 logf (LOG_FATAL|LOG_ERRNO, "mf_read: Read failed (%s)",
494 mf->files[mf->cur_file].path);
497 else if (rd < toread)
506 int mf_write(MFile mf, int no, int offset, int nbytes, const void *buf)
508 int ps, nblocks, towrite;
510 char tmp[FILENAME_MAX+1];
511 unsigned char dummych = '\xff';
513 if ((ps = file_position(mf, no, offset)) < 0)
515 /* file needs to grow */
516 while (ps >= mf->files[mf->cur_file].blocks)
518 /* file overflow - allocate new file */
519 if (mf->files[mf->cur_file].dir->max_bytes >= 0 &&
520 (ps - mf->files[mf->cur_file].blocks + 1) * mf->blocksize >
521 mf->files[mf->cur_file].dir->avail_bytes)
524 if ((nblocks = mf->files[mf->cur_file].dir->avail_bytes /
527 logf (LOG_DEBUG, "Capping off file %s at pos %d",
528 mf->files[mf->cur_file].path, nblocks);
529 if ((ps = file_position(mf,
530 (mf->cur_file ? mf->files[mf->cur_file-1].top : 0) +
531 mf->files[mf->cur_file].blocks + nblocks - 1, 0)) < 0)
533 logf (LOG_DEBUG, "ps = %d", ps);
534 if (write(mf->files[mf->cur_file].fd, &dummych, 1) < 1)
536 logf (LOG_ERRNO|LOG_FATAL, "write dummy");
539 mf->files[mf->cur_file].blocks += nblocks;
540 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
541 mf->files[mf->cur_file].dir->avail_bytes -= nblocks *
545 logf (LOG_DEBUG, "Creating new file.");
546 for (dp = mf->ma->dirs; dp && dp->max_bytes >= 0 &&
547 dp->avail_bytes < mf->min_bytes_creat; dp = dp->next);
550 logf (LOG_FATAL, "Cannot allocate more space for %s",
554 mf->files[mf->cur_file].top = (mf->cur_file ?
555 mf->files[mf->cur_file-1].top : -1) +
556 mf->files[mf->cur_file].blocks;
557 mf->files[++(mf->cur_file)].top = -1;
558 mf->files[mf->cur_file].dir = dp;
559 mf->files[mf->cur_file].number =
560 mf->files[mf->cur_file-1].number + 1;
561 mf->files[mf->cur_file].blocks =
562 mf->files[mf->cur_file].bytes = 0;
563 mf->files[mf->cur_file].fd = -1;
564 sprintf(tmp, "%s/%s-%d.mf", dp->name, mf->name,
565 mf->files[mf->cur_file].number);
566 mf->files[mf->cur_file].path = xstrdup(tmp);
568 /* open new file and position at beginning */
569 if ((ps = file_position(mf, no, offset)) < 0)
574 nblocks = ps - mf->files[mf->cur_file].blocks + 1;
575 mf->files[mf->cur_file].blocks += nblocks;
576 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
577 if (mf->files[mf->cur_file].dir->max_bytes >= 0)
578 mf->files[mf->cur_file].dir->avail_bytes -=
579 nblocks * mf->blocksize;
582 towrite = nbytes ? nbytes : mf->blocksize;
583 if (write(mf->files[mf->cur_file].fd, buf, towrite) < towrite)
585 logf (LOG_FATAL|LOG_ERRNO, "Write failed for file %s part %d",
586 mf->name, mf->cur_file);
593 * Destroy a metafile, unlinking component files. File must be open.
595 int mf_unlink(MFile mf)
599 for (i = 0; i < mf->no_files; i++)
600 unlink (mf->files[i].path);
605 * Unlink the file by name, rather than MFile-handle. File should be closed.
607 int mf_unlink_name(MFile_area ma, const char *name)