1 files changed, 53 insertions, 0 deletions

diff --git a/busybox/libbb/device_open.c b/busybox/libbb/device_open.c
new file mode 100644
index 000000000..61f954f46
--- /dev/null
+++ b/busybox/libbb/device_open.c
@@ -0,0 +1,53 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include "libbb.h"
+
+
+/* try to open up the specified device */
+extern int device_open(const char *device, int mode)
+{
+        int m, f, fd = -1;
+
+        m = mode | O_NONBLOCK;
+
+        /* Retry up to 5 times */
+        for (f = 0; f < 5; f++)
+                if ((fd = open(device, m, 0600)) >= 0)
+                        break;
+        if (fd < 0)
+                return fd;
+        /* Reset original flags. */
+        if (m != mode)
+                fcntl(fd, F_SETFL, mode);
+        return fd;
+}
+
+/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/