2 * Copyright (C) 1994-1998, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.28 1998-05-20 10:00:35 adam
8 * Fixed register spec so that colon isn't treated as size separator
9 * unless followed by [0-9+-] in order to allow DOS drive specifications.
11 * Revision 1.27 1998/02/10 11:55:07 adam
14 * Revision 1.26 1997/10/27 14:25:38 adam
17 * Revision 1.25 1997/09/18 08:59:16 adam
18 * Extra generic handle for the character mapping routines.
20 * Revision 1.24 1997/09/17 12:19:06 adam
21 * Zebra version corresponds to YAZ version 1.4.
22 * Changed Zebra server so that it doesn't depend on global common_resource.
24 * Revision 1.23 1997/09/09 13:37:53 adam
25 * Partial port to WIN95/NT.
27 * Revision 1.22 1997/09/04 13:56:39 adam
28 * Added O_BINARY to open calls.
30 * Revision 1.21 1996/10/29 13:56:18 adam
31 * Include of zebrautl.h instead of alexutil.h.
33 * Revision 1.20 1996/05/14 12:10:16 quinn
36 * Revision 1.19 1996/05/01 07:16:30 quinn
39 * Revision 1.18 1996/04/09 06:47:30 adam
40 * Function scan_areadef doesn't use sscanf (%n fails on this Linux).
42 * Revision 1.17 1996/03/20 13:29:11 quinn
45 * Revision 1.16 1995/12/12 15:57:57 adam
46 * Implemented mf_unlink. cf_unlink uses mf_unlink.
48 * Revision 1.15 1995/12/08 16:21:14 adam
49 * Work on commit/update.
51 * Revision 1.14 1995/12/05 13:12:37 quinn
54 * Revision 1.13 1995/11/30 17:00:50 adam
55 * Several bug fixes. Commit system runs now.
57 * Revision 1.12 1995/11/24 17:26:11 quinn
58 * Mostly about making some ISAM stuff in the config file optional.
60 * Revision 1.11 1995/11/13 09:32:43 quinn
63 * Revision 1.10 1995/09/04 12:33:22 adam
64 * Various cleanup. YAZ util used instead.
66 * Revision 1.9 1994/11/04 14:26:39 quinn
69 * Revision 1.8 1994/10/05 16:56:42 quinn
72 * Revision 1.7 1994/09/19 14:12:37 quinn
75 * Revision 1.6 1994/09/14 13:10:15 quinn
76 * Corrected some bugs in the init-phase
78 * Revision 1.5 1994/09/12 08:01:51 quinn
81 * Revision 1.4 1994/09/01 14:51:07 quinn
82 * Allowed mf_write to write beyond eof+1.
84 * Revision 1.3 1994/08/24 09:37:17 quinn
85 * Changed reaction to read return values.
87 * Revision 1.2 1994/08/23 14:50:48 quinn
90 * Revision 1.1 1994/08/23 14:41:33 quinn
91 * First functional version.
97 * TODO: The size estimates in init may not be accurate due to
98 * only partially written final blocks.
101 #include <sys/types.h>
115 #include <zebrautl.h>
118 static int scan_areadef(MFile_area ma, const char *name, const char *ad)
121 * If no definition is given, use current directory, unlimited.
123 char dirname[FILENAME_MAX+1];
124 mf_dir **dp = &ma->dirs, *dir = *dp;
130 const char *ad0 = ad;
131 int i = 0, fact = 1, multi, size = 0;
133 while (*ad == ' ' || *ad == '\t')
139 if (*ad == ':' && strchr ("+-0123456789", ad[1]))
141 if (i < FILENAME_MAX)
148 logf (LOG_FATAL, "Missing colon after path: %s", ad0);
153 logf (LOG_FATAL, "Empty path: %s", ad0);
156 while (*ad == ' ' || *ad == '\t')
166 if (*ad < '0' || *ad > '9')
168 logf (LOG_FATAL, "Missing size after path: %s", ad0);
172 while (*ad >= '0' && *ad <= '9')
173 size = size*10 + (*ad++ - '0');
176 case 'B': case 'b': multi = 1; break;
177 case 'K': case 'k': multi = 1024; break;
178 case 'M': case 'm': multi = 1048576; break;
180 logf (LOG_FATAL, "Missing unit: %s", ad0);
183 logf (LOG_FATAL, "Illegal unit: %c in %s", *ad, ad0);
187 *dp = dir = xmalloc(sizeof(mf_dir));
189 strcpy(dir->name, dirname);
190 dir->max_bytes = dir->avail_bytes = fact * size * multi;
196 static int file_position(MFile mf, int pos, int offset)
198 int off = 0, c = mf->cur_file, ps;
200 if ((c > 0 && pos <= mf->files[c-1].top) ||
201 (c < mf->no_files -1 && pos > mf->files[c].top))
204 while (c + 1 < mf->no_files && mf->files[c].top < pos)
206 off += mf->files[c].blocks;
209 assert(c < mf->no_files);
212 off = c ? (mf->files[c-1].top + 1) : 0;
213 if (mf->files[c].fd < 0 && (mf->files[c].fd = open(mf->files[c].path,
214 mf->wr ? (O_BINARY|O_RDWR|O_CREAT) : (O_BINARY|O_RDONLY), 0666)) < 0)
216 if (!mf->wr && errno == ENOENT && off == 0)
218 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", mf->files[c].path);
221 if (lseek(mf->files[c].fd, (ps = pos - off) * mf->blocksize + offset,
224 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s", mf->files[c].path);
231 static int cmp_part_file(const void *p1, const void *p2)
233 return ((part_file *)p1)->number - ((part_file *)p2)->number;
237 * Create a new area, cotaining metafiles in directories.
238 * Find the part-files in each directory, and inventory the existing metafiles.
240 MFile_area mf_init(const char *name, const char *spec)
242 MFile_area ma = xmalloc(sizeof(*ma));
245 part_file *part_f = 0;
249 char metaname[FILENAME_MAX+1], tmpnam[FILENAME_MAX+1];
251 logf (LOG_DEBUG, "mf_init(%s)", name);
252 strcpy(ma->name, name);
255 if (scan_areadef(ma, name, spec) < 0)
257 logf (LOG_FATAL, "Failed to access description of '%s'", name);
260 /* look at each directory */
261 for (dirp = ma->dirs; dirp; dirp = dirp->next)
263 if (!(dd = opendir(dirp->name)))
265 logf (LOG_FATAL|LOG_ERRNO, "Failed to open %s", dirp->name);
268 /* look at each file */
269 while ((dent = readdir(dd)))
271 if (*dent->d_name == '.')
273 if (sscanf(dent->d_name, "%[^.].mf.%d", metaname, &number) != 2)
275 logf (LOG_DEBUG, "bf: %s is not a part-file.", dent->d_name);
278 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
281 if (!strcmp(meta_f->name, metaname))
283 part_f = &meta_f->files[meta_f->no_files++];
290 meta_f = xmalloc(sizeof(*meta_f));
292 meta_f->next = ma->mfiles;
294 meta_f->cur_file = -1;
296 strcpy(meta_f->name, metaname);
297 part_f = &meta_f->files[0];
298 meta_f->no_files = 1;
300 part_f->number = number;
303 sprintf(tmpnam, "%s/%s", dirp->name, dent->d_name);
304 part_f->path = xstrdup(tmpnam);
306 if ((fd = open(part_f->path, O_BINARY|O_RDONLY)) < 0)
308 logf (LOG_FATAL|LOG_ERRNO, "Failed to access %s",
312 if ((part_f->bytes = lseek(fd, 0, SEEK_END)) < 0)
314 logf (LOG_FATAL|LOG_ERRNO, "Failed to seek in %s",
319 if (dirp->max_bytes >= 0)
320 dirp->avail_bytes -= part_f->bytes;
324 for (meta_f = ma->mfiles; meta_f; meta_f = meta_f->next)
326 logf (LOG_DEBUG, "mf_init: %s consists of %d part(s)", meta_f->name,
328 qsort(meta_f->files, meta_f->no_files, sizeof(part_file),
334 void mf_destroy(MFile_area ma)
352 meta_file *m = meta_f;
354 for (i = 0; i<m->no_files; i++)
356 xfree (m->files[i].path);
358 meta_f = meta_f->next;
366 * If !ma, Use MF_DEFAULT_AREA.
368 MFile mf_open(MFile_area ma, const char *name, int block_size, int wflag)
370 struct meta_file *mnew;
372 char tmp[FILENAME_MAX+1];
375 logf(LOG_DEBUG, "mf_open(%s bs=%d, %s)", name, block_size,
376 wflag ? "RW" : "RDONLY");
378 for (mnew = ma->mfiles; mnew; mnew = mnew->next)
379 if (!strcmp(name, mnew->name))
386 mnew = xmalloc(sizeof(*mnew));
387 strcpy(mnew->name, name);
388 /* allocate one, empty file */
390 mnew->files[0].bytes = mnew->files[0].blocks = 0;
391 mnew->files[0].top = -1;
392 mnew->files[0].number = 0;
393 mnew->files[0].fd = -1;
394 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
395 for (dp = ma->dirs; dp && dp->max_bytes >= 0 && dp->avail_bytes <
396 mnew->min_bytes_creat; dp = dp->next);
399 logf (LOG_FATAL, "Insufficient space for new mfile.");
402 mnew->files[0].dir = dp;
403 sprintf(tmp, "%s/%s.mf.%d", dp->name, mnew->name, 0);
404 mnew->files[0].path = xstrdup(tmp);
406 mnew->next = ma->mfiles;
411 for (i = 0; i < mnew->no_files; i++)
413 if (mnew->files[i].bytes % block_size)
414 mnew->files[i].bytes += block_size - mnew->files[i].bytes %
416 mnew->files[i].blocks = mnew->files[i].bytes / block_size;
420 mnew->blocksize = block_size;
421 mnew->min_bytes_creat = MF_MIN_BLOCKS_CREAT * block_size;
426 for (i = 0; i < mnew->no_files; i++)
428 mnew->files[i].blocks = mnew->files[i].bytes / mnew->blocksize;
429 if (i == mnew->no_files - 1)
430 mnew->files[i].top = -1;
433 i ? (mnew->files[i-1].top + mnew->files[i].blocks)
434 : (mnew->files[i].blocks - 1);
442 int mf_close(MFile mf)
446 logf (LOG_DEBUG, "mf_close(%s)", mf->name);
448 for (i = 0; i < mf->no_files; i++)
449 if (mf->files[i].fd >= 0)
451 close(mf->files[i].fd);
452 mf->files[i].fd = -1;
459 * Read one block from a metafile. Interface mirrors bfile.
461 int mf_read(MFile mf, int no, int offset, int num, void *buf)
465 if ((rd = file_position(mf, no, offset)) < 0)
470 toread = num ? num : mf->blocksize;
471 if ((rd = read(mf->files[mf->cur_file].fd, buf, toread)) < 0)
473 logf (LOG_FATAL|LOG_ERRNO, "mf_read: Read failed (%s)",
474 mf->files[mf->cur_file].path);
477 else if (rd < toread)
486 int mf_write(MFile mf, int no, int offset, int num, const void *buf)
488 int ps, nblocks, towrite;
490 char tmp[FILENAME_MAX+1];
491 unsigned char dummych = '\xff';
493 if ((ps = file_position(mf, no, offset)) < 0)
495 /* file needs to grow */
496 while (ps >= mf->files[mf->cur_file].blocks)
498 /* file overflow - allocate new file */
499 if (mf->files[mf->cur_file].dir->max_bytes >= 0 &&
500 (ps - mf->files[mf->cur_file].blocks + 1) * mf->blocksize >
501 mf->files[mf->cur_file].dir->avail_bytes)
504 if ((nblocks = mf->files[mf->cur_file].dir->avail_bytes /
507 logf (LOG_DEBUG, "Capping off file %s at pos %d",
508 mf->files[mf->cur_file].path, nblocks);
509 if ((ps = file_position(mf,
510 (mf->cur_file ? mf->files[mf->cur_file-1].top : 0) +
511 mf->files[mf->cur_file].blocks + nblocks, 0)) < 0)
513 if (write(mf->files[mf->cur_file].fd, &dummych, 1) < 1)
515 logf (LOG_ERRNO|LOG_FATAL, "write dummy");
518 mf->files[mf->cur_file].blocks += nblocks;
519 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
520 mf->files[mf->cur_file].dir->avail_bytes -= nblocks *
524 logf (LOG_DEBUG, "Creating new file.");
525 for (dp = mf->ma->dirs; dp && dp->max_bytes >= 0 &&
526 dp->avail_bytes < mf->min_bytes_creat; dp = dp->next);
529 logf (LOG_FATAL, "Cannot allocate more space for %s",
533 mf->files[mf->cur_file].top = (mf->cur_file ?
534 mf->files[mf->cur_file-1].top : -1) +
535 mf->files[mf->cur_file].blocks;
536 mf->files[++(mf->cur_file)].top = -1;
537 mf->files[mf->cur_file].dir = dp;
538 mf->files[mf->cur_file].number =
539 mf->files[mf->cur_file-1].number + 1;
540 mf->files[mf->cur_file].blocks =
541 mf->files[mf->cur_file].bytes = 0;
542 mf->files[mf->cur_file].fd = -1;
543 sprintf(tmp, "%s/%s.mf.%d", dp->name, mf->name,
544 mf->files[mf->cur_file].number);
545 mf->files[mf->cur_file].path = xstrdup(tmp);
547 /* open new file and position at beginning */
548 if ((ps = file_position(mf, no, offset)) < 0)
553 nblocks = ps - mf->files[mf->cur_file].blocks + 1;
554 mf->files[mf->cur_file].blocks += nblocks;
555 mf->files[mf->cur_file].bytes += nblocks * mf->blocksize;
556 if (mf->files[mf->cur_file].dir->max_bytes >= 0)
557 mf->files[mf->cur_file].dir->avail_bytes -=
558 nblocks * mf->blocksize;
561 towrite = num ? num : mf->blocksize;
562 if (write(mf->files[mf->cur_file].fd, buf, towrite) < towrite)
564 logf (LOG_FATAL|LOG_ERRNO, "Write failed for file %s part %d",
565 mf->name, mf->cur_file);
572 * Destroy a metafile, unlinking component files. File must be open.
574 int mf_unlink(MFile mf)
578 for (i = 0; i < mf->no_files; i++)
579 unlink (mf->files[i].path);
584 * Unlink the file by name, rather than MFile-handle. File should be closed.
586 int mf_unlink_name(MFile_area ma, const char *name)