Re: [PATCH] driver core: Add the ability to unbind drivers to devices from userspace

[Jon Smirl <jonsmirl@gmail.com>]

New, simplified version of the sysfs whitespace strip patch...

-- 
Jon Smirl
jonsmirl@gmail.com

Remove leading and trailing whitespace when text sysfs attribute is set
signed-off-by: Jon Smirl <jonsmirl@gmail.com>

diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -6,6 +6,7 @@
 #include <linux/fsnotify.h>
 #include <linux/kobject.h>
 #include <linux/namei.h>
+#include <linux/ctype.h>
 #include <asm/uaccess.h>
 #include <asm/semaphore.h>
 
@@ -207,8 +208,22 @@ flush_write_buffer(struct dentry * dentr
 	struct attribute * attr = to_attr(dentry);
 	struct kobject * kobj = to_kobj(dentry->d_parent);
 	struct sysfs_ops * ops = buffer->ops;
+	char *x;
 
-	return ops->store(kobj,attr,buffer->page,count);
+	/* locate trailing white space */
+	while ((count > 0) && isspace(buffer->page[count - 1]))
+		count--;
+
+	/* locate leading white space */
+	x = buffer->page;
+	while (isspace(*x) && (x - buffer->page < count))
+		x++;
+	count -= (x - buffer->page);
+
+	/* terminate the string */
+	x[count] = '\0';
+
+	return ops->store(kobj, attr, x, count);
 }