From: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Date: Wed, 19 May 2010 16:23:22 +0000 (-0400)
Subject: Check truncate and append flags.
X-Git-Url: http://git.cascardo.info/?p=cascardo%2Fkernel%2Fsamples%2Fchar2%2F.git;a=commitdiff_plain;h=5b94b5e132c4e676bfbbe9bf61249d2893bae429

Check truncate and append flags.
---

diff --git a/hellochar.c b/hellochar.c
index ee09b1e..71605f6 100644
--- a/hellochar.c
+++ b/hellochar.c
@@ -37,6 +37,12 @@ struct hello_buffer *hello;
 
 static int hello_open(struct inode *ino, struct file *fp)
 {
+	if (fp->f_flags & O_TRUNC) {
+		memset(hello->buffer, 0, MAXLEN);
+		hello->len = 0;
+	}
+	if (fp->f_flags & O_APPEND)
+		fp->f_pos = hello->len;
 	return 0;
 }