1 files changed, 56 insertions, 0 deletions
diff --git a/compat/dbminit.c b/compat/dbminit.c
new file mode 100644
index 0000000..94ddc22
--- /dev/null
+++ b/compat/dbminit.c
@@ -0,0 +1,56 @@
+/* dbminit.c - Open the file for dbm operations. This looks like the
+   DBM interface. */
+
+/* This file is part of GDBM, the GNU data base manager.
+   Copyright (C) 1990, 1991, 1993, 2007, 2011 Free Software Foundation,
+   Inc.
+
+   GDBM is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GDBM is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GDBM. If not, see <http://www.gnu.org/licenses/>.   */
+
+/* Include system configuration before all else. */
+#include "autoconf.h"
+#include "dbm-priv.h"
+
+DBM *_gdbm_file;
+
+/* Initialize dbm system.  FILE is a pointer to the file name.  In
+   standard dbm, the database is found in files called FILE.pag and
+   FILE.dir.  To make gdbm compatable with dbm using the dbminit call,
+   the same file names are used.  Specifically, dbminit will use the file
+   name FILE.pag in its call to gdbm open.  If the file (FILE.pag) has a
+   size of zero bytes, a file initialization procedure is performed,
+   setting up the initial structure in the file.  Any error detected will
+   cause a return value of -1.  No errors cause the return value of 0.
+   NOTE: file.dir will be linked to file.pag. */
+
+int
+dbminit (char *file)
+{
+  if (_gdbm_file != NULL)
+    dbm_close (_gdbm_file);
+  /* Try to open the file as a writer.  DBM never created a file. */
+  _gdbm_file = dbm_open (file, O_RDWR, 0644);
+  /* If it was not opened, try opening it as a reader. */
+  if (_gdbm_file == NULL)
+    {
+      _gdbm_file = dbm_open (file, O_RDONLY, 0644);
+      /* Did we successfully open the file? */
+      if (_gdbm_file == NULL)
+	{
+	  gdbm_errno = GDBM_FILE_OPEN_ERROR;
+	  return -1;
+	}
+    }
+  return 0;
+}