1 files changed, 147 insertions, 0 deletions
diff --git a/db2/os/db_os_open.c b/db2/os/db_os_open.c
new file mode 100644
index 0000000000..1d67ef9508
--- /dev/null
+++ b/db2/os/db_os_open.c
@@ -0,0 +1,147 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)db_os_open.c	10.14 (Sleepycat) 7/5/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#endif
+
+#include "db_int.h"
+#include "os_ext.h"
+
+/*
+ * __db_oflags --
+ *	Convert open(2) flags to DB flags.
+ *
+ * PUBLIC: int __db_oflags __P((int));
+ */
+int
+__db_oflags(oflags)
+	int oflags;
+{
+	int dbflags;
+
+	/*
+	 * XXX
+	 * Convert POSIX 1003.1 open(2) flags to DB flags.  Not an exact
+	 * science as most POSIX implementations don't have a flag value
+	 * for O_RDONLY, it's simply the lack of a write flag.
+	 */
+	dbflags = 0;
+	if (oflags & O_CREAT)
+		dbflags |= DB_CREATE;
+	if (!(oflags & (O_RDWR | O_WRONLY)) || oflags & O_RDONLY)
+		dbflags |= DB_RDONLY;
+	if (oflags & O_TRUNC)
+		dbflags |= DB_TRUNCATE;
+	return (dbflags);
+}
+
+/*
+ * __db_fdopen --
+ *	Open a file descriptor.
+ *
+ * PUBLIC: int __db_fdopen __P((const char *, int, int, int, int *));
+ */
+int
+__db_fdopen(name, arg_flags, ok_flags, mode, fdp)
+	const char *name;
+	int arg_flags, ok_flags, mode, *fdp;
+{
+	int fd, flags;
+
+	if (arg_flags & ~ok_flags)
+		return (EINVAL);
+
+	flags = 0;
+	if (arg_flags & DB_CREATE)
+		flags |= O_CREAT;
+
+	if (arg_flags & DB_EXCL)
+		flags |= O_EXCL;
+
+	if (arg_flags & DB_RDONLY)
+		flags |= O_RDONLY;
+	else
+		flags |= O_RDWR;
+
+#ifdef _WIN32
+#ifdef _MSC_VER
+	if (arg_flags & DB_SEQUENTIAL)
+		flags |= _O_SEQUENTIAL;
+	else
+		flags |= _O_RANDOM;
+
+	if (arg_flags & DB_TEMPORARY)
+		flags |= _O_TEMPORARY;
+#endif
+	flags |= O_BINARY | O_NOINHERIT;
+#endif
+
+	if (arg_flags & DB_TRUNCATE)
+		flags |= O_TRUNC;
+
+	/* Open the file. */
+	if ((fd = open(name, flags, mode)) == -1)
+		return (errno);
+
+#ifndef _WIN32
+	/* Delete any temporary file; done for Win32 by _O_TEMPORARY. */
+	if (arg_flags & DB_TEMPORARY)
+		(void)unlink(name);
+#endif
+
+#if !defined(_WIN32) && !defined(macintosh)
+	/*
+	 * Deny access to any child process; done for Win32 by O_NOINHERIT,
+	 * MacOS has neither child processes nor fd inheritance.
+	 */
+	if (fcntl(fd, F_SETFD, 1) == -1) {
+		int ret = errno;
+
+		(void)__db_close(fd);
+		return (ret);
+	}
+#endif
+	*fdp = fd;
+	return (0);
+}
+
+/*
+ * __db_fsync --
+ *	Flush a file descriptor.
+ *
+ * PUBLIC: int __db_fsync __P((int));
+ */
+int
+__db_fsync(fd)
+	int fd;
+{
+	return (fsync(fd) ? errno : 0);
+}
+
+/*
+ * __db_close --
+ *	Close a file descriptor.
+ *
+ * PUBLIC: int __db_close __P((int));
+ */
+int
+__db_close(fd)
+	int fd;
+{
+	return (close(fd) ? errno : 0);
+}