2 * Copyright (C) 1994, Index Data I/S
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.21 1996-10-29 13:56:13 adam
8 * Include of zebrautl.h instead of alexutil.h.
10 * Revision 1.20 1996/03/26 15:59:04 adam
11 * The directory of the shadow table file can be specified by the new
14 * Revision 1.19 1996/02/05 12:28:58 adam
15 * Removed a LOG_LOG message.
17 * Revision 1.18 1996/01/02 08:59:06 quinn
18 * Changed "commit" setting to "shadow".
20 * Revision 1.17 1995/12/11 09:03:51 adam
21 * New function: cf_unlink.
22 * New member of commit file head: state (0) deleted, (1) hash file.
24 * Revision 1.16 1995/12/08 16:21:13 adam
25 * Work on commit/update.
27 * Revision 1.15 1995/12/01 16:24:28 adam
28 * Commit files use separate meta file area.
30 * Revision 1.14 1995/12/01 11:37:21 adam
31 * Cached/commit files implemented as meta-files.
33 * Revision 1.13 1995/11/30 17:00:49 adam
34 * Several bug fixes. Commit system runs now.
36 * Revision 1.12 1995/11/30 08:33:10 adam
37 * Started work on commit facility.
39 * Revision 1.11 1995/09/04 12:33:21 adam
40 * Various cleanup. YAZ util used instead.
42 * Revision 1.10 1994/08/25 10:15:54 quinn
45 * Revision 1.9 1994/08/24 08:45:48 quinn
48 * Revision 1.8 1994/08/23 15:03:34 quinn
49 * *** empty log message ***
51 * Revision 1.7 1994/08/23 14:25:45 quinn
52 * Added O_CREAT because some geek wanted it. Sheesh.
54 * Revision 1.6 1994/08/23 14:21:38 quinn
57 * Revision 1.5 1994/08/18 08:10:08 quinn
60 * Revision 1.4 1994/08/17 14:27:32 quinn
63 * Revision 1.2 1994/08/17 14:09:32 quinn
64 * Compiles cleanly (still only dummy).
66 * Revision 1.1 1994/08/17 13:55:08 quinn
67 * New blocksystem. dummy only
81 static MFile_area commit_area = NULL;
82 static char *commit_lockDir = NULL;
84 static FILE *open_cache (const char *flags)
86 char cacheFilename[1024];
89 sprintf (cacheFilename, "%scache", commit_lockDir ? commit_lockDir : "");
90 file = fopen (cacheFilename, flags);
94 static void unlink_cache (void)
96 char cacheFilename[1024];
98 sprintf (cacheFilename, "%scache", commit_lockDir ? commit_lockDir : "");
99 unlink (cacheFilename);
102 void bf_lockDir (const char *lockDir)
106 xfree (commit_lockDir);
110 len = strlen(lockDir);
111 commit_lockDir = xmalloc (len+2);
112 strcpy (commit_lockDir, lockDir);
114 if (len > 0 && commit_lockDir[len-1] != '/')
115 strcpy (commit_lockDir + len, "/");
118 void bf_cache (int enableFlag)
123 if (res_get (common_resource, "shadow"))
125 commit_area = mf_init ("shadow");
129 logf (LOG_FATAL, "Shadow area must be defined if commit"
138 int bf_close (BFile bf)
147 BFile bf_open (const char *name, int block_size, int wflag)
149 BFile tmp = xmalloc(sizeof(BFile_struct));
155 tmp->mf = mf_open (0, name, block_size, 0);
156 tmp->cf = cf_open (tmp->mf, commit_area, name, block_size,
162 outf = open_cache ("a");
165 logf (LOG_FATAL|LOG_ERRNO, "open %scache",
166 commit_lockDir ? commit_lockDir : "");
169 fprintf (outf, "%s %d\n", name, block_size);
175 tmp->mf = mf_open(0, name, block_size, wflag);
180 logf (LOG_FATAL, "mf_open failed for %s", name);
187 int bf_read (BFile bf, int no, int offset, int num, void *buf)
191 if (bf->cf && (r=cf_read (bf->cf, no, offset, num, buf)) != -1)
193 return mf_read (bf->mf, no, offset, num, buf);
196 int bf_write (BFile bf, int no, int offset, int num, const void *buf)
199 return cf_write (bf->cf, no, offset, num, buf);
200 return mf_write (bf->mf, no, offset, num, buf);
203 int bf_commitExists (void)
207 inf = open_cache ("r");
216 void bf_commitExec (void)
225 assert (commit_area);
226 if (!(inf = open_cache ("r")))
228 logf (LOG_LOG, "No commit file");
231 while (fscanf (inf, "%s %d", path, &block_size) == 2)
233 mf = mf_open (0, path, block_size, 1);
234 cf = cf_open (mf, commit_area, path, block_size, 0, &first_time);
244 void bf_commitClean (void)
260 if (!(inf = open_cache ("r")))
262 while (fscanf (inf, "%s %d", path, &block_size) == 2)
264 mf = mf_open (0, path, block_size, 0);
265 cf = cf_open (mf, commit_area, path, block_size, 1, &firstTime);