2 * Copyright (C) 1994-1997, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.26 1997-10-27 14:25:38 adam
10 * Revision 1.25 1997/09/18 08:59:16 adam
11 * Extra generic handle for the character mapping routines.
13 * Revision 1.24 1997/09/17 12:19:06 adam
14 * Zebra version corresponds to YAZ version 1.4.
15 * Changed Zebra server so that it doesn't depend on global common_resource.
17 * Revision 1.23 1997/09/09 13:37:53 adam
18 * Partial port to WIN95/NT.
20 * Revision 1.22 1997/09/04 13:56:39 adam
21 * Added O_BINARY to open calls.
23 * Revision 1.21 1996/10/29 13:56:18 adam
24 * Include of zebrautl.h instead of alexutil.h.
26 * Revision 1.20 1996/05/14 12:10:16 quinn
29 * Revision 1.19 1996/05/01 07:16:30 quinn
32 * Revision 1.18 1996/04/09 06:47:30 adam
33 * Function scan_areadef doesn't use sscanf (%n fails on this Linux).
35 * Revision 1.17 1996/03/20 13:29:11 quinn
38 * Revision 1.16 1995/12/12 15:57:57 adam
39 * Implemented mf_unlink. cf_unlink uses mf_unlink.
41 * Revision 1.15 1995/12/08 16:21:14 adam
42 * Work on commit/update.
44 * Revision 1.14 1995/12/05 13:12:37 quinn
47 * Revision 1.13 1995/11/30 17:00:50 adam
48 * Several bug fixes. Commit system runs now.
50 * Revision 1.12 1995/11/24 17:26:11 quinn
51 * Mostly about making some ISAM stuff in the config file optional.
53 * Revision 1.11 1995/11/13 09:32:43 quinn
56 * Revision 1.10 1995/09/04 12:33:22 adam
57 * Various cleanup. YAZ util used instead.
59 * Revision 1.9 1994/11/04 14:26:39 quinn
62 * Revision 1.8 1994/10/05 16:56:42 quinn
65 * Revision 1.7 1994/09/19 14:12:37 quinn
68 * Revision 1.6 1994/09/14 13:10:15 quinn
69 * Corrected some bugs in the init-phase
71 * Revision 1.5 1994/09/12 08:01:51 quinn
74 * Revision 1.4 1994/09/01 14:51:07 quinn
75 * Allowed mf_write to write beyond eof+1.
77 * Revision 1.3 1994/08/24 09:37:17 quinn
78 * Changed reaction to read return values.
80 * Revision 1.2 1994/08/23 14:50:48 quinn
83 * Revision 1.1 1994/08/23 14:41:33 quinn
84 * First functional version.
90 * TODO: The size estimates in init may not be accurate due to
91 * only partially written final blocks.
94 #include <sys/types.h>
108 #include <zebrautl.h>
111 static int scan_areadef(MFile_area ma, const char *name, const char *ad)
114 * If no definition is given, use current directory, unlimited.
116 char dirname[FILENAME_MAX+1];
117 mf_dir **dp = &ma->dirs, *dir = *dp;
123 const char *ad0 = ad;
124 int i = 0, fact = 1, multi, size = 0;
126 while (*ad == ' ' || *ad == '\t')
130 while (*ad && *ad != ':')
132 if (i < FILENAME_MAX)
139 logf (LOG_FATAL, "Missing colon after path: %s", ad0);
144 logf (LOG_FATAL, "Empty path: %s", ad0);
147 while (*ad == ' ' || *ad == '\t')
157 if (*ad < '0' || *ad > '9')
159 logf (LOG_FATAL, "Missing size after path: %s", ad0);
163 while (*ad >= '0' && *ad <= '9')
164 size = size*10 + (*ad++ - '0');
167 case 'B': case 'b': multi = 1; break;
168 case 'K': case 'k': multi = 1024; break;
169 case 'M': case 'm': multi = 1048576; break;
171 logf (LOG_FATAL, "Missing unit: %s", ad0);
174 logf (LOG_FATAL, "Illegal unit: %c in %s", *ad, ad0);
178 *dp = dir = xmalloc(sizeof(mf_dir));
180 strcpy(dir->name, dirname);
181 dir->max_bytes = dir->avail_bytes = fact * size * multi;
187 static int file_position(MFile mf, int pos, int offset)
189 int off = 0, c = mf->cur_file, ps;
191 if ((c > 0 && pos <= mf->files[c-1].top) ||
192 (c < mf->no_files -1 && pos > mf->files[c].top))
195 while (c + 1 < mf->no_files && mf->files[c].top < pos)
197 off += mf->files[c].blocks;
200 assert(c < mf->no_files);
203 off = c ? (mf->files[c-1].top + 1) : 0;
204 if (mf->files[c].fd < 0 && (mf->files[c].fd = open(mf->files[c].path,
205 mf->wr ? (O_BINARY|O_RDWR|O_CREAT) : (O_BINARY|O_RDONLY), 0666)) < 0)
207 if (!mf->wr && errno == ENOENT && off == 0)
209 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", mf->files[c].path);
212 if (lseek(mf->files[c].fd, (ps = pos - off) * mf->blocksize + offset,
215 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s", mf->files[c].path);
222 static int cmp_part_file(const void *p1, const void *p2)
224 return ((part_file *)p1)->number - ((part_file *)p2)->number;
228 * Create a new area, cotaining metafiles in directories.
229 * Find the part-files in each directory, and inventory the existing metafiles.
231 MFile_area mf_init(const char *name, const char *spec)
233 MFile_area ma = xmalloc(sizeof(*ma));
236 part_file *part_f = 0;
240 char metaname[FILENAME_MAX+1], tmpnam[FILENAME_MAX+1];
242 logf (LOG_DEBUG, "mf_init(%s)", name);
243 strcpy(ma->name, name);
246 if (scan_areadef(ma, name, spec) < 0)
248 logf (LOG_FATAL, "Failed to access description of '%s'", name);
251 /* look at each directory */
252 for (dirp = ma->dirs; dirp; dirp = dirp->next)
254 if (!(dd = opendir(dirp->name)))
256 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", dirp->name);
259 /* look at each file */
260 while ((dent = readdir(dd)))
262 if (*dent->d_name == '.')
264 if (sscanf(dent->d_name, "%[^.].mf.%d", metaname, &number) != 2)
266 logf (LOG_DEBUG, "bf: %s is not a part-file.", dent->d_name);
269 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
272 if (!strcmp(meta_f->name, metaname))
274 part_f = &meta_f->files[meta_f->no_files++];
281 meta_f = xmalloc(sizeof(*meta_f));
283 meta_f->next = ma->mfiles;
285 meta_f->cur_file = -1;
287 strcpy(meta_f->name, metaname);
288 part_f = &meta_f->files[0];
289 meta_f->no_files = 1;
291 part_f->number = number;
294 sprintf(tmpnam, "%s/%s", dirp->name, dent->d_name);
295 part_f->path = xstrdup(tmpnam);
297 if ((fd = open(part_f->path, O_BINARY|O_RDONLY)) < 0)
299 logf (LOG_FATAL|LOG_ERRNO, "Failed to access %s",
303 if ((part_f->bytes = lseek(fd, 0, SEEK_END)) < 0)
305 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s",
310 if (dirp->max_bytes >= 0)
311 dirp->avail_bytes -= part_f->bytes;
315 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
317 logf (LOG_DEBUG, "mf_init: %s consists of %d part(s)", meta_f->name,
319 qsort(meta_f->files, meta_f->no_files, sizeof(part_file),
325 void mf_destroy(MFile_area ma)
343 meta_file *m = meta_f;
345 for (i = 0; i<m->no_files; i++)
347 xfree (m->files[i].path);
349 meta_f = meta_f->next;
357 * If !ma, Use MF_DEFAULT_AREA.
359 MFile mf_open(MFile_area ma, const char *name, int block_size, int wflag)
361 struct meta_file *mnew;
363 char tmp[FILENAME_MAX+1];
366 logf(LOG_DEBUG, "mf_open(%s bs=%d, %s)", name, block_size,
367 wflag ? "RW" : "RDONLY");
369 for (mnew = ma->mfiles; mnew; mnew = mnew->next)
370 if (!strcmp(name, mnew->name))
377 mnew = xmalloc(sizeof(*mnew));
378 strcpy(mnew->name, name);
379 /* allocate one, empty file */
381 mnew->files[0].bytes = mnew->files[0].blocks = 0;
382 mnew->files[0].top = -1;
383 mnew->files[0].number = 0;
384 mnew->files[0].fd = -1;
385 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
386 for (dp = ma->dirs; dp && dp->max_bytes >= 0 && dp->avail_bytes <
387 mnew->min_bytes_creat; dp = dp->next);
390 logf (LOG_FATAL, "Insufficient space for new mfile.");
393 mnew->files[0].dir = dp;
394 sprintf(tmp, "%s/%s.mf.%d", dp->name, mnew->name, 0);
395 mnew->files[0].path = xstrdup(tmp);
397 mnew->next = ma->mfiles;
402 for (i = 0; i < mnew->no_files; i++)
404 if (mnew->files[i].bytes % block_size)
405 mnew->files[i].bytes += block_size - mnew->files[i].bytes %
407 mnew->files[i].blocks = mnew->files[i].bytes / block_size;
411 mnew->blocksize = block_size;
412 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
417 for (i = 0; i < mnew->no_files; i++)
419 mnew->files[i].blocks = mnew->files[i].bytes / mnew->blocksize;
420 if (i == mnew->no_files - 1)
421 mnew->files[i].top = -1;
424 i ? (mnew->files[i-1].top + mnew->files[i].blocks)
425 : (mnew->files[i].blocks - 1);
433 int mf_close(MFile mf)
437 logf (LOG_DEBUG, "mf_close(%s)", mf->name);
439 for (i = 0; i < mf->no_files; i++)
440 if (mf->files[i].fd >= 0)
442 close(mf->files[i].fd);
443 mf->files[i].fd = -1;
450 * Read one block from a metafile. Interface mirrors bfile.
452 int mf_read(MFile mf, int no, int offset, int num, void *buf)
456 if ((rd = file_position(mf, no, offset)) < 0)
461 toread = num ? num : mf->blocksize;
462 if ((rd = read(mf->files[mf->cur_file].fd, buf, toread)) < 0)
464 logf (LOG_FATAL|LOG_ERRNO, "mf_read: Read failed (%s)",
465 mf->files[mf->cur_file].path);
468 else if (rd < toread)
477 int mf_write(MFile mf, int no, int offset, int num, const void *buf)
479 int ps, nblocks, towrite;
481 char tmp[FILENAME_MAX+1];
482 unsigned char dummych = '\xff';
484 if ((ps = file_position(mf, no, offset)) < 0)
486 /* file needs to grow */
487 while (ps >= mf->files[mf->cur_file].blocks)
489 /* file overflow - allocate new file */
490 if (mf->files[mf->cur_file].dir->max_bytes >= 0 &&
491 (ps - mf->files[mf->cur_file].blocks + 1) * mf->blocksize >
492 mf->files[mf->cur_file].dir->avail_bytes)
495 if ((nblocks = mf->files[mf->cur_file].dir->avail_bytes /
498 logf (LOG_DEBUG, "Capping off file %s at pos %d",
499 mf->files[mf->cur_file].path, nblocks);
500 if ((ps = file_position(mf,
501 (mf->cur_file ? mf->files[mf->cur_file-1].top : 0) +
502 mf->files[mf->cur_file].blocks + nblocks, 0)) < 0)
504 if (write(mf->files[mf->cur_file].fd, &dummych, 1) < 1)
506 logf (LOG_ERRNO|LOG_FATAL, "write dummy");
509 mf->files[mf->cur_file].blocks += nblocks;
510 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
511 mf->files[mf->cur_file].dir->avail_bytes -= nblocks *
515 logf (LOG_DEBUG, "Creating new file.");
516 for (dp = mf->ma->dirs; dp && dp->max_bytes >= 0 &&
517 dp->avail_bytes < mf->min_bytes_creat; dp = dp->next);
520 logf (LOG_FATAL, "Cannot allocate more space for %s",
524 mf->files[mf->cur_file].top = (mf->cur_file ?
525 mf->files[mf->cur_file-1].top : -1) +
526 mf->files[mf->cur_file].blocks;
527 mf->files[++(mf->cur_file)].top = -1;
528 mf->files[mf->cur_file].dir = dp;
529 mf->files[mf->cur_file].number =
530 mf->files[mf->cur_file-1].number + 1;
531 mf->files[mf->cur_file].blocks =
532 mf->files[mf->cur_file].bytes = 0;
533 mf->files[mf->cur_file].fd = -1;
534 sprintf(tmp, "%s/%s.mf.%d", dp->name, mf->name,
535 mf->files[mf->cur_file].number);
536 mf->files[mf->cur_file].path = xstrdup(tmp);
538 /* open new file and position at beginning */
539 if ((ps = file_position(mf, no, offset)) < 0)
544 nblocks = ps - mf->files[mf->cur_file].blocks + 1;
545 mf->files[mf->cur_file].blocks += nblocks;
546 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
547 if (mf->files[mf->cur_file].dir->max_bytes >= 0)
548 mf->files[mf->cur_file].dir->avail_bytes -=
549 nblocks * mf->blocksize;
552 towrite = num ? num : mf->blocksize;
553 if (write(mf->files[mf->cur_file].fd, buf, towrite) < towrite)
555 logf (LOG_FATAL|LOG_ERRNO, "Write failed");
562 * Destroy a metafile, unlinking component files. File must be open.
564 int mf_unlink(MFile mf)
568 for (i = 0; i < mf->no_files; i++)
569 unlink (mf->files[i].path);
574 * Unlink the file by name, rather than MFile-handle. File should be closed.
576 int mf_unlink_name(MFile_area ma, const char *name)