1 files changed, 111 insertions, 0 deletions
diff --git a/db/os/os_finit.c b/db/os/os_finit.c
new file mode 100644
index 000000000..23b606ecb
--- /dev/null
+++ b/db/os/os_finit.c
@@ -0,0 +1,111 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1998, 1999, 2000
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "db_config.h"
+
+#ifndef lint
+static const char revid[] = "$Id: os_finit.c,v 11.8 2000/11/30 00:58:42 ubell Exp $";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <string.h>
+#endif
+
+#include "db_int.h"
+
+/*
+ * __os_finit --
+ *	Initialize a regular file, optionally zero-filling it as well.
+ *
+ * PUBLIC: int __os_finit __P((DB_ENV *, DB_FH *, size_t, int));
+ */
+int
+__os_finit(dbenv, fhp, size, zerofill)
+	DB_ENV *dbenv;
+	DB_FH *fhp;
+	size_t size;
+	int zerofill;
+{
+	db_pgno_t pages;
+	size_t i;
+	size_t nw;
+	u_int32_t relative;
+	int ret;
+	char buf[OS_VMPAGESIZE];
+
+	/* Write nuls to the new bytes. */
+	memset(buf, 0, sizeof(buf));
+
+	/*
+	 * Extend the region by writing the last page.  If the region is >4Gb,
+	 * increment may be larger than the maximum possible seek "relative"
+	 * argument, as it's an unsigned 32-bit value.  Break the offset into
+	 * pages of 1MB each so that we don't overflow (2^20 + 2^32 is bigger
+	 * than any memory I expect to see for awhile).
+	 */
+	if ((ret = __os_seek(dbenv, fhp, 0, 0, 0, 0, DB_OS_SEEK_END)) != 0)
+		return (ret);
+	pages = (size - OS_VMPAGESIZE) / MEGABYTE;
+	relative = (size - OS_VMPAGESIZE) % MEGABYTE;
+	if ((ret = __os_seek(dbenv,
+	    fhp, MEGABYTE, pages, relative, 0, DB_OS_SEEK_CUR)) != 0)
+		return (ret);
+	if ((ret = __os_write(dbenv, fhp, buf, sizeof(buf), &nw)) != 0)
+		return (ret);
+	if (nw != sizeof(buf))
+		return (EIO);
+
+	/*
+	 * We may want to guarantee that there is enough disk space for the
+	 * file, so we also write a byte to each page.  We write the byte
+	 * because reading it is insufficient on systems smart enough not to
+	 * instantiate disk pages to satisfy a read (e.g., Solaris).
+	 */
+	if (zerofill) {
+		pages = size / MEGABYTE;
+		relative = size % MEGABYTE;
+		if ((ret = __os_seek(dbenv, fhp,
+		    MEGABYTE, pages, relative, 1, DB_OS_SEEK_END)) != 0)
+			return (ret);
+
+		/* Write a byte to each page. */
+		for (i = 0; i < size; i += OS_VMPAGESIZE) {
+			if ((ret = __os_write(dbenv, fhp, buf, 1, &nw)) != 0)
+				return (ret);
+			if (nw != 1)
+				return (EIO);
+			if ((ret = __os_seek(dbenv, fhp,
+			    0, 0, OS_VMPAGESIZE - 1, 0, DB_OS_SEEK_CUR)) != 0)
+				return (ret);
+		}
+	}
+	return (0);
+}
+
+/*
+ * __os_fpinit --
+ *	Initialize a page in a regular file.
+ *
+ * PUBLIC: int __os_fpinit __P((DB_ENV *, DB_FH *, db_pgno_t, int, int));
+ */
+int
+__os_fpinit(dbenv, fhp, pgno, pagecount, pagesize)
+	DB_ENV *dbenv;
+	DB_FH *fhp;
+	db_pgno_t pgno;
+	int pagecount, pagesize;
+{
+	COMPQUIET(dbenv, NULL);
+	COMPQUIET(fhp, NULL);
+	COMPQUIET(pgno, 0);
+	COMPQUIET(pagecount, 0);
+	COMPQUIET(pagesize, 0);
+
+	return (0);
+}