* Sebastian Hammer, Adam Dickmeiss
*
* $Log: bfile.c,v $
- * Revision 1.1 1994-08-17 13:55:08 quinn
- * Deleted
+ * Revision 1.20 1996-03-26 15:59:04 adam
+ * The directory of the shadow table file can be specified by the new
+ * bf_lockDir call.
+ *
+ * Revision 1.19 1996/02/05 12:28:58 adam
+ * Removed a LOG_LOG message.
+ *
+ * Revision 1.18 1996/01/02 08:59:06 quinn
+ * Changed "commit" setting to "shadow".
+ *
+ * Revision 1.17 1995/12/11 09:03:51 adam
+ * New function: cf_unlink.
+ * New member of commit file head: state (0) deleted, (1) hash file.
+ *
+ * Revision 1.16 1995/12/08 16:21:13 adam
+ * Work on commit/update.
+ *
+ * Revision 1.15 1995/12/01 16:24:28 adam
+ * Commit files use separate meta file area.
+ *
+ * Revision 1.14 1995/12/01 11:37:21 adam
+ * Cached/commit files implemented as meta-files.
+ *
+ * Revision 1.13 1995/11/30 17:00:49 adam
+ * Several bug fixes. Commit system runs now.
+ *
+ * Revision 1.12 1995/11/30 08:33:10 adam
+ * Started work on commit facility.
+ *
+ * Revision 1.11 1995/09/04 12:33:21 adam
+ * Various cleanup. YAZ util used instead.
+ *
+ * Revision 1.10 1994/08/25 10:15:54 quinn
+ * Trivial
+ *
+ * Revision 1.9 1994/08/24 08:45:48 quinn
+ * Using mfile.
+ *
+ * Revision 1.8 1994/08/23 15:03:34 quinn
+ * *** empty log message ***
+ *
+ * Revision 1.7 1994/08/23 14:25:45 quinn
+ * Added O_CREAT because some geek wanted it. Sheesh.
+ *
+ * Revision 1.6 1994/08/23 14:21:38 quinn
+ * Fixed call to log
+ *
+ * Revision 1.5 1994/08/18 08:10:08 quinn
+ * Minimal changes
+ *
+ * Revision 1.4 1994/08/17 14:27:32 quinn
+ * last mods
+ *
+ * Revision 1.2 1994/08/17 14:09:32 quinn
+ * Compiles cleanly (still only dummy).
+ *
+ * Revision 1.1 1994/08/17 13:55:08 quinn
+ * New blocksystem. dummy only
*
*/
-#include <util.h>
-#include <sys/types.h>
-#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
#include <unistd.h>
+#include <alexutil.h>
+#include <bfile.h>
+#include "cfile.h"
+
+static MFile_area commit_area = NULL;
+static char *commit_lockDir = NULL;
+
+static FILE *open_cache (const char *flags)
+{
+ char cacheFilename[1024];
+ FILE *file;
+
+ sprintf (cacheFilename, "%scache", commit_lockDir ? commit_lockDir : "");
+ file = fopen (cacheFilename, flags);
+ return file;
+}
+
+static void unlink_cache (void)
+{
+ char cacheFilename[1024];
+
+ sprintf (cacheFilename, "%scache", commit_lockDir ? commit_lockDir : "");
+ unlink (cacheFilename);
+}
+
+void bf_lockDir (const char *lockDir)
+{
+ size_t len;
+
+ xfree (commit_lockDir);
+
+ if (lockDir == NULL)
+ lockDir = "";
+ len = strlen(lockDir);
+ commit_lockDir = xmalloc (len+2);
+ strcpy (commit_lockDir, lockDir);
+
+ if (len > 0 && commit_lockDir[len-1] != '/')
+ strcpy (commit_lockDir + len, "/");
+}
+
+void bf_cache (int enableFlag)
+{
+ if (enableFlag)
+ {
+ if (!commit_area)
+ if (res_get (common_resource, "shadow"))
+ {
+ commit_area = mf_init ("shadow");
+ }
+ else
+ {
+ logf (LOG_FATAL, "Shadow area must be defined if commit"
+ "is to be enabled");
+ exit (1);
+ }
+ }
+ else
+ commit_area = NULL;
+}
+
int bf_close (BFile bf)
{
- close(bf->fd);
- xfree(bf);
- return(0);
+ if (bf->cf)
+ cf_close (bf->cf);
+ mf_close (bf->mf);
+ xfree (bf);
+ return 0;
}
-BFile bf_open (const char *name, int block_size, int cache, wflag)
+BFile bf_open (const char *name, int block_size, int wflag)
{
BFile tmp = xmalloc(sizeof(BFile_struct));
- if ((tmp->fd = open(name, wflag ? O_RDWR : O_RDONLY, 0666)) < 0)
+ if (commit_area)
+ {
+ int first_time;
+
+ tmp->mf = mf_open (0, name, block_size, 0);
+ tmp->cf = cf_open (tmp->mf, commit_area, name, block_size,
+ wflag, &first_time);
+ if (first_time)
+ {
+ FILE *outf;
+
+ outf = open_cache ("a");
+ if (!outf)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "open %scache",
+ commit_lockDir ? commit_lockDir : "");
+ exit (1);
+ }
+ fprintf (outf, "%s %d\n", name, block_size);
+ fclose (outf);
+ }
+ }
+ else
{
- log(LOG_FATAL, "open: %s");
- return(-1);
+ tmp->mf = mf_open(0, name, block_size, wflag);
+ tmp->cf = NULL;
+ }
+ if (!tmp->mf)
+ {
+ logf (LOG_FATAL, "mf_open failed for %s", name);
+ xfree (tmp);
+ return 0;
}
return(tmp);
}
-int bf_read (BFile bf, int no, int offset, int no, void *buf);
+int bf_read (BFile bf, int no, int offset, int num, void *buf)
+{
+ int r;
+
+ if (bf->cf && (r=cf_read (bf->cf, no, offset, num, buf)) != -1)
+ return r;
+ return mf_read (bf->mf, no, offset, num, buf);
+}
+
+int bf_write (BFile bf, int no, int offset, int num, const void *buf)
+{
+ if (bf->cf)
+ return cf_write (bf->cf, no, offset, num, buf);
+ return mf_write (bf->mf, no, offset, num, buf);
+}
+
+int bf_commitExists (void)
+{
+ FILE *inf;
+
+ inf = open_cache ("r");
+ if (inf)
+ {
+ fclose (inf);
+ return 1;
+ }
+ return 0;
+}
+
+void bf_commitExec (void)
+{
+ FILE *inf;
+ int block_size;
+ char path[256];
+ MFile mf;
+ CFile cf;
+ int first_time;
+
+ assert (commit_area);
+ if (!(inf = open_cache ("r")))
+ {
+ logf (LOG_LOG, "No commit file");
+ return ;
+ }
+ while (fscanf (inf, "%s %d", path, &block_size) == 2)
+ {
+ mf = mf_open (0, path, block_size, 1);
+ cf = cf_open (mf, commit_area, path, block_size, 0, &first_time);
+
+ cf_commit (cf);
+
+ cf_close (cf);
+ mf_close (mf);
+ }
+ fclose (inf);
+}
+
+void bf_commitClean (void)
{
- if (seek
+ FILE *inf;
+ int block_size;
+ char path[256];
+ MFile mf;
+ CFile cf;
+ int mustDisable = 0;
+ int firstTime;
+
+ if (!commit_area)
+ {
+ bf_cache (1);
+ mustDisable = 1;
+ }
+
+ if (!(inf = open_cache ("r")))
+ return ;
+ while (fscanf (inf, "%s %d", path, &block_size) == 2)
+ {
+ mf = mf_open (0, path, block_size, 0);
+ cf = cf_open (mf, commit_area, path, block_size, 1, &firstTime);
+ cf_unlink (cf);
+ cf_close (cf);
+ mf_close (mf);
+ }
+ fclose (inf);
+ unlink_cache ();
+ if (mustDisable)
+ bf_cache (0);
}
-int bf_write (BFile bf, int no, int offset, int no, const void *buf);
projects / idzebra-moved-to-github.git / blobdiff