2 * Copyright (C) 1994-1998, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.27 1998-02-10 11:55:07 adam
10 * Revision 1.26 1997/10/27 14:25:38 adam
13 * Revision 1.25 1997/09/18 08:59:16 adam
14 * Extra generic handle for the character mapping routines.
16 * Revision 1.24 1997/09/17 12:19:06 adam
17 * Zebra version corresponds to YAZ version 1.4.
18 * Changed Zebra server so that it doesn't depend on global common_resource.
20 * Revision 1.23 1997/09/09 13:37:53 adam
21 * Partial port to WIN95/NT.
23 * Revision 1.22 1997/09/04 13:56:39 adam
24 * Added O_BINARY to open calls.
26 * Revision 1.21 1996/10/29 13:56:18 adam
27 * Include of zebrautl.h instead of alexutil.h.
29 * Revision 1.20 1996/05/14 12:10:16 quinn
32 * Revision 1.19 1996/05/01 07:16:30 quinn
35 * Revision 1.18 1996/04/09 06:47:30 adam
36 * Function scan_areadef doesn't use sscanf (%n fails on this Linux).
38 * Revision 1.17 1996/03/20 13:29:11 quinn
41 * Revision 1.16 1995/12/12 15:57:57 adam
42 * Implemented mf_unlink. cf_unlink uses mf_unlink.
44 * Revision 1.15 1995/12/08 16:21:14 adam
45 * Work on commit/update.
47 * Revision 1.14 1995/12/05 13:12:37 quinn
50 * Revision 1.13 1995/11/30 17:00:50 adam
51 * Several bug fixes. Commit system runs now.
53 * Revision 1.12 1995/11/24 17:26:11 quinn
54 * Mostly about making some ISAM stuff in the config file optional.
56 * Revision 1.11 1995/11/13 09:32:43 quinn
59 * Revision 1.10 1995/09/04 12:33:22 adam
60 * Various cleanup. YAZ util used instead.
62 * Revision 1.9 1994/11/04 14:26:39 quinn
65 * Revision 1.8 1994/10/05 16:56:42 quinn
68 * Revision 1.7 1994/09/19 14:12:37 quinn
71 * Revision 1.6 1994/09/14 13:10:15 quinn
72 * Corrected some bugs in the init-phase
74 * Revision 1.5 1994/09/12 08:01:51 quinn
77 * Revision 1.4 1994/09/01 14:51:07 quinn
78 * Allowed mf_write to write beyond eof+1.
80 * Revision 1.3 1994/08/24 09:37:17 quinn
81 * Changed reaction to read return values.
83 * Revision 1.2 1994/08/23 14:50:48 quinn
86 * Revision 1.1 1994/08/23 14:41:33 quinn
87 * First functional version.
93 * TODO: The size estimates in init may not be accurate due to
94 * only partially written final blocks.
97 #include <sys/types.h>
111 #include <zebrautl.h>
114 static int scan_areadef(MFile_area ma, const char *name, const char *ad)
117 * If no definition is given, use current directory, unlimited.
119 char dirname[FILENAME_MAX+1];
120 mf_dir **dp = &ma->dirs, *dir = *dp;
126 const char *ad0 = ad;
127 int i = 0, fact = 1, multi, size = 0;
129 while (*ad == ' ' || *ad == '\t')
133 while (*ad && *ad != ':')
135 if (i < FILENAME_MAX)
142 logf (LOG_FATAL, "Missing colon after path: %s", ad0);
147 logf (LOG_FATAL, "Empty path: %s", ad0);
150 while (*ad == ' ' || *ad == '\t')
160 if (*ad < '0' || *ad > '9')
162 logf (LOG_FATAL, "Missing size after path: %s", ad0);
166 while (*ad >= '0' && *ad <= '9')
167 size = size*10 + (*ad++ - '0');
170 case 'B': case 'b': multi = 1; break;
171 case 'K': case 'k': multi = 1024; break;
172 case 'M': case 'm': multi = 1048576; break;
174 logf (LOG_FATAL, "Missing unit: %s", ad0);
177 logf (LOG_FATAL, "Illegal unit: %c in %s", *ad, ad0);
181 *dp = dir = xmalloc(sizeof(mf_dir));
183 strcpy(dir->name, dirname);
184 dir->max_bytes = dir->avail_bytes = fact * size * multi;
190 static int file_position(MFile mf, int pos, int offset)
192 int off = 0, c = mf->cur_file, ps;
194 if ((c > 0 && pos <= mf->files[c-1].top) ||
195 (c < mf->no_files -1 && pos > mf->files[c].top))
198 while (c + 1 < mf->no_files && mf->files[c].top < pos)
200 off += mf->files[c].blocks;
203 assert(c < mf->no_files);
206 off = c ? (mf->files[c-1].top + 1) : 0;
207 if (mf->files[c].fd < 0 && (mf->files[c].fd = open(mf->files[c].path,
208 mf->wr ? (O_BINARY|O_RDWR|O_CREAT) : (O_BINARY|O_RDONLY), 0666)) < 0)
210 if (!mf->wr && errno == ENOENT && off == 0)
212 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", mf->files[c].path);
215 if (lseek(mf->files[c].fd, (ps = pos - off) * mf->blocksize + offset,
218 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s", mf->files[c].path);
225 static int cmp_part_file(const void *p1, const void *p2)
227 return ((part_file *)p1)->number - ((part_file *)p2)->number;
231 * Create a new area, cotaining metafiles in directories.
232 * Find the part-files in each directory, and inventory the existing metafiles.
234 MFile_area mf_init(const char *name, const char *spec)
236 MFile_area ma = xmalloc(sizeof(*ma));
239 part_file *part_f = 0;
243 char metaname[FILENAME_MAX+1], tmpnam[FILENAME_MAX+1];
245 logf (LOG_DEBUG, "mf_init(%s)", name);
246 strcpy(ma->name, name);
249 if (scan_areadef(ma, name, spec) < 0)
251 logf (LOG_FATAL, "Failed to access description of '%s'", name);
254 /* look at each directory */
255 for (dirp = ma->dirs; dirp; dirp = dirp->next)
257 if (!(dd = opendir(dirp->name)))
259 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", dirp->name);
262 /* look at each file */
263 while ((dent = readdir(dd)))
265 if (*dent->d_name == '.')
267 if (sscanf(dent->d_name, "%[^.].mf.%d", metaname, &number) != 2)
269 logf (LOG_DEBUG, "bf: %s is not a part-file.", dent->d_name);
272 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
275 if (!strcmp(meta_f->name, metaname))
277 part_f = &meta_f->files[meta_f->no_files++];
284 meta_f = xmalloc(sizeof(*meta_f));
286 meta_f->next = ma->mfiles;
288 meta_f->cur_file = -1;
290 strcpy(meta_f->name, metaname);
291 part_f = &meta_f->files[0];
292 meta_f->no_files = 1;
294 part_f->number = number;
297 sprintf(tmpnam, "%s/%s", dirp->name, dent->d_name);
298 part_f->path = xstrdup(tmpnam);
300 if ((fd = open(part_f->path, O_BINARY|O_RDONLY)) < 0)
302 logf (LOG_FATAL|LOG_ERRNO, "Failed to access %s",
306 if ((part_f->bytes = lseek(fd, 0, SEEK_END)) < 0)
308 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s",
313 if (dirp->max_bytes >= 0)
314 dirp->avail_bytes -= part_f->bytes;
318 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
320 logf (LOG_DEBUG, "mf_init: %s consists of %d part(s)", meta_f->name,
322 qsort(meta_f->files, meta_f->no_files, sizeof(part_file),
328 void mf_destroy(MFile_area ma)
346 meta_file *m = meta_f;
348 for (i = 0; i<m->no_files; i++)
350 xfree (m->files[i].path);
352 meta_f = meta_f->next;
360 * If !ma, Use MF_DEFAULT_AREA.
362 MFile mf_open(MFile_area ma, const char *name, int block_size, int wflag)
364 struct meta_file *mnew;
366 char tmp[FILENAME_MAX+1];
369 logf(LOG_DEBUG, "mf_open(%s bs=%d, %s)", name, block_size,
370 wflag ? "RW" : "RDONLY");
372 for (mnew = ma->mfiles; mnew; mnew = mnew->next)
373 if (!strcmp(name, mnew->name))
380 mnew = xmalloc(sizeof(*mnew));
381 strcpy(mnew->name, name);
382 /* allocate one, empty file */
384 mnew->files[0].bytes = mnew->files[0].blocks = 0;
385 mnew->files[0].top = -1;
386 mnew->files[0].number = 0;
387 mnew->files[0].fd = -1;
388 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
389 for (dp = ma->dirs; dp && dp->max_bytes >= 0 && dp->avail_bytes <
390 mnew->min_bytes_creat; dp = dp->next);
393 logf (LOG_FATAL, "Insufficient space for new mfile.");
396 mnew->files[0].dir = dp;
397 sprintf(tmp, "%s/%s.mf.%d", dp->name, mnew->name, 0);
398 mnew->files[0].path = xstrdup(tmp);
400 mnew->next = ma->mfiles;
405 for (i = 0; i < mnew->no_files; i++)
407 if (mnew->files[i].bytes % block_size)
408 mnew->files[i].bytes += block_size - mnew->files[i].bytes %
410 mnew->files[i].blocks = mnew->files[i].bytes / block_size;
414 mnew->blocksize = block_size;
415 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
420 for (i = 0; i < mnew->no_files; i++)
422 mnew->files[i].blocks = mnew->files[i].bytes / mnew->blocksize;
423 if (i == mnew->no_files - 1)
424 mnew->files[i].top = -1;
427 i ? (mnew->files[i-1].top + mnew->files[i].blocks)
428 : (mnew->files[i].blocks - 1);
436 int mf_close(MFile mf)
440 logf (LOG_DEBUG, "mf_close(%s)", mf->name);
442 for (i = 0; i < mf->no_files; i++)
443 if (mf->files[i].fd >= 0)
445 close(mf->files[i].fd);
446 mf->files[i].fd = -1;
453 * Read one block from a metafile. Interface mirrors bfile.
455 int mf_read(MFile mf, int no, int offset, int num, void *buf)
459 if ((rd = file_position(mf, no, offset)) < 0)
464 toread = num ? num : mf->blocksize;
465 if ((rd = read(mf->files[mf->cur_file].fd, buf, toread)) < 0)
467 logf (LOG_FATAL|LOG_ERRNO, "mf_read: Read failed (%s)",
468 mf->files[mf->cur_file].path);
471 else if (rd < toread)
480 int mf_write(MFile mf, int no, int offset, int num, const void *buf)
482 int ps, nblocks, towrite;
484 char tmp[FILENAME_MAX+1];
485 unsigned char dummych = '\xff';
487 if ((ps = file_position(mf, no, offset)) < 0)
489 /* file needs to grow */
490 while (ps >= mf->files[mf->cur_file].blocks)
492 /* file overflow - allocate new file */
493 if (mf->files[mf->cur_file].dir->max_bytes >= 0 &&
494 (ps - mf->files[mf->cur_file].blocks + 1) * mf->blocksize >
495 mf->files[mf->cur_file].dir->avail_bytes)
498 if ((nblocks = mf->files[mf->cur_file].dir->avail_bytes /
501 logf (LOG_DEBUG, "Capping off file %s at pos %d",
502 mf->files[mf->cur_file].path, nblocks);
503 if ((ps = file_position(mf,
504 (mf->cur_file ? mf->files[mf->cur_file-1].top : 0) +
505 mf->files[mf->cur_file].blocks + nblocks, 0)) < 0)
507 if (write(mf->files[mf->cur_file].fd, &dummych, 1) < 1)
509 logf (LOG_ERRNO|LOG_FATAL, "write dummy");
512 mf->files[mf->cur_file].blocks += nblocks;
513 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
514 mf->files[mf->cur_file].dir->avail_bytes -= nblocks *
518 logf (LOG_DEBUG, "Creating new file.");
519 for (dp = mf->ma->dirs; dp && dp->max_bytes >= 0 &&
520 dp->avail_bytes < mf->min_bytes_creat; dp = dp->next);
523 logf (LOG_FATAL, "Cannot allocate more space for %s",
527 mf->files[mf->cur_file].top = (mf->cur_file ?
528 mf->files[mf->cur_file-1].top : -1) +
529 mf->files[mf->cur_file].blocks;
530 mf->files[++(mf->cur_file)].top = -1;
531 mf->files[mf->cur_file].dir = dp;
532 mf->files[mf->cur_file].number =
533 mf->files[mf->cur_file-1].number + 1;
534 mf->files[mf->cur_file].blocks =
535 mf->files[mf->cur_file].bytes = 0;
536 mf->files[mf->cur_file].fd = -1;
537 sprintf(tmp, "%s/%s.mf.%d", dp->name, mf->name,
538 mf->files[mf->cur_file].number);
539 mf->files[mf->cur_file].path = xstrdup(tmp);
541 /* open new file and position at beginning */
542 if ((ps = file_position(mf, no, offset)) < 0)
547 nblocks = ps - mf->files[mf->cur_file].blocks + 1;
548 mf->files[mf->cur_file].blocks += nblocks;
549 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
550 if (mf->files[mf->cur_file].dir->max_bytes >= 0)
551 mf->files[mf->cur_file].dir->avail_bytes -=
552 nblocks * mf->blocksize;
555 towrite = num ? num : mf->blocksize;
556 if (write(mf->files[mf->cur_file].fd, buf, towrite) < towrite)
558 logf (LOG_FATAL|LOG_ERRNO, "Write failed for file %s part %d",
559 mf->name, mf->cur_file);
566 * Destroy a metafile, unlinking component files. File must be open.
568 int mf_unlink(MFile mf)
572 for (i = 0; i < mf->no_files; i++)
573 unlink (mf->files[i].path);
578 * Unlink the file by name, rather than MFile-handle. File should be closed.
580 int mf_unlink_name(MFile_area ma, const char *name)