From: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Date: Thu, 20 May 2010 13:44:10 +0000 (-0400)
Subject: Added user space program to loop reading hello device.
X-Git-Url: http://git.cascardo.eti.br/?p=cascardo%2Fkernel%2Fsamples%2Fchar2%2F.git;a=commitdiff_plain;h=88178e01c428c528750fc29ff2576822aa6d7153

Added user space program to loop reading hello device.
---

diff --git a/usr.c b/usr.c
new file mode 100644
index 0000000..0829125
--- /dev/null
+++ b/usr.c
@@ -0,0 +1,37 @@
+/*
+ *  Copyright (C) 2010  Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
+ *
+ *  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.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
+#include <fcntl.h>
+#include <unistd.h>
+
+int main(void)
+{
+	int fd;
+	char buffer[16];
+	int r;
+	fd = open("/dev/hello", O_RDONLY);
+	if (fd < 0)
+		return 1;
+	while (1) {
+		lseek(fd, 0, SEEK_SET);
+		r = read(fd, buffer, sizeof(buffer));
+		write(1, buffer, r);
+	}
+	return 0;
+}