* Sebastian Hammer, Adam Dickmeiss
*
* $Log: bfile.c,v $
- * Revision 1.12 1995-11-30 08:33:10 adam
+ * Revision 1.21 1996-10-29 13:56:13 adam
+ * Include of zebrautl.h instead of alexutil.h.
+ *
+ * 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
*/
#include <stdio.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <unistd.h>
#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <unistd.h>
-#include <alexutil.h>
+#include <zebrautl.h>
#include <bfile.h>
#include "cfile.h"
-static const char *cache_name = NULL;
+static MFile_area commit_area = NULL;
+static char *commit_lockDir = NULL;
-void bf_cache (const char *name)
+static FILE *open_cache (const char *flags)
{
- cache_name = name;
+ 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)
{
BFile tmp = xmalloc(sizeof(BFile_struct));
- if (cache_name)
+ if (commit_area)
{
- FILE *outf;
int first_time;
- logf (LOG_LOG, "cf,mf_open %s, cache_name=%s", name, cache_name);
- tmp->mf = mf_open(0, name, block_size, wflag);
- tmp->cf = cf_open(tmp->mf, cache_name, name, block_size, wflag,
- &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)
{
- outf = fopen (cache_name, "a");
+ 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);
}
return mf_write (bf->mf, no, offset, num, buf);
}
-void bf_commit (const char *name)
+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;
CFile cf;
int first_time;
- if (!(inf = fopen (name, "r")))
+ assert (commit_area);
+ if (!(inf = open_cache ("r")))
{
- logf (LOG_FATAL|LOG_ERRNO, "cannot open commit %s", name);
- exit (1);
+ logf (LOG_LOG, "No commit file");
+ return ;
}
- while (fscanf (inf, "%s %d", path, &block_size) == 1)
+ while (fscanf (inf, "%s %d", path, &block_size) == 2)
{
- mf = mf_open(0, path, block_size, 1);
- cf = cf_open(mf, name, path, block_size, 0, &first_time);
+ mf = mf_open (0, path, block_size, 1);
+ cf = cf_open (mf, commit_area, path, block_size, 0, &first_time);
cf_commit (cf);
}
fclose (inf);
}
+
+void bf_commitClean (void)
+{
+ 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);
+}
projects / idzebra-moved-to-github.git / blobdiff