1 files changed, 74 insertions, 0 deletions
diff --git a/db2/os/os_rw.c b/db2/os/os_rw.c
new file mode 100644
index 0000000000..48f7fdc5b1
--- /dev/null
+++ b/db2/os/os_rw.c
@@ -0,0 +1,74 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)os_rw.c	10.6 (Sleepycat) 10/25/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <errno.h>
+#include <unistd.h>
+#endif
+
+#include "db_int.h"
+
+/*
+ * __db_read --
+ *	Read from a file handle.
+ *
+ * PUBLIC: int __db_read __P((int, void *, size_t, ssize_t *));
+ */
+int
+__db_read(fd, addr, len, nrp)
+	int fd;
+	void *addr;
+	size_t len;
+	ssize_t *nrp;
+{
+	size_t offset;
+	ssize_t nr;
+	u_int8_t *taddr;
+
+	for (taddr = addr,
+	    offset = 0; offset < len; taddr += nr, offset += nr) {
+		if ((nr = __os_read(fd, taddr, len - offset)) < 0)
+			return (errno);
+		if (nr == 0)
+			break;
+	}
+	*nrp = taddr - (u_int8_t *)addr;
+	return (0);
+}
+
+/*
+ * __db_write --
+ *	Write to a file handle.
+ *
+ * PUBLIC: int __db_write __P((int, void *, size_t, ssize_t *));
+ */
+int
+__db_write(fd, addr, len, nwp)
+	int fd;
+	void *addr;
+	size_t len;
+	ssize_t *nwp;
+{
+	size_t offset;
+	ssize_t nw;
+	u_int8_t *taddr;
+
+	for (taddr = addr,
+	    offset = 0; offset < len; taddr += nw, offset += nw)
+		if ((nw = __os_write(fd, taddr, len - offset)) < 0)
+			return (errno);
+	*nwp = len;
+	return (0);
+}