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Initialize database with version number.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@3169 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Johan Danielsson
1997-08-26 22:27:52 +00:00
parent 14f6dc9063
commit f37eb7386a
1 changed files with 55 additions and 3 deletions
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58
lib/hdb/hdb.c
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@@ -255,17 +255,69 @@ hdb_foreach(krb5_context context,
return ret;
}
krb5_error_code
hdb_check_db_format(krb5_context context, HDB *db)
{
krb5_data tag;
krb5_data version;
krb5_error_code ret;
unsigned ver;
tag.data = HDB_DB_FORMAT_ENTRY;
tag.length = strlen(tag.data);
ret = (*db->_get)(context, db, tag, &version);
if(ret)
return ret;
if(sscanf(version.data, "%u", &ver) != 1)
return HDB_ERR_BADVERSION;
if(ver != HDB_DB_FORMAT)
return HDB_ERR_BADVERSION;
return 0;
}
krb5_error_code
hdb_init_db(krb5_context context, HDB *db)
{
krb5_error_code ret;
krb5_data tag;
krb5_data version;
char ver[32];
ret = hdb_check_db_format(context, db);
if(ret != HDB_ERR_NOENTRY)
return ret;
tag.data = HDB_DB_FORMAT_ENTRY;
tag.length = strlen(tag.data);
snprintf(ver, sizeof(ver), "%u", HDB_DB_FORMAT);
version.data = ver;
version.length = strlen(version.data) + 1; /* zero terminated */
ret = (*db->_put)(context, db, 0, tag, version);
return ret;
}
krb5_error_code
hdb_open(krb5_context context, HDB **db,
const char *filename, int flags, mode_t mode)
{
krb5_error_code ret = 0;
if(filename == NULL)
filename = HDB_DEFAULT_DB;
initialize_hdb_error_table(&context->et_list);
#ifdef HAVE_DB_H
return hdb_db_open(context, db, filename, flags, mode);
ret = hdb_db_open(context, db, filename, flags, mode);
#elif HAVE_NDBM_H
return hdb_ndbm_open(context, db, filename, flags, mode);
ret = hdb_ndbm_open(context, db, filename, flags, mode);
#else
#error No suitable database library
krb5_errx(context, 1, "No database support! (hdb_open)");
#endif
if(ret == 0){
if(((flags & O_ACCMODE) == O_WRONLY || (flags & O_ACCMODE) == O_RDWR) &&
(flags & O_CREAT))
ret = hdb_init_db(context, *db);
else
ret = hdb_check_db_format(context, *db);
if(ret)
(*db)->close(context, *db);
}
return ret;
}