Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=035ed7a49447bc8e15d4d9316fc6a359b2d94333
Commit: 035ed7a49447bc8e15d4d9316fc6a359b2d94333
Parent: 06a4bcae1ff2cd5f6f42bd74add85ec785a26343
Author: Thomas Maier <[EMAIL PROTECTED]>
AuthorDate: Sun Oct 22 19:17:47 2006 +0200
Committer: Greg Kroah-Hartman <[EMAIL PROTECTED]>
CommitDate: Fri Dec 1 14:52:01 2006 -0800
sysfs: sysfs_write_file() writes zero terminated data
since most of the files in sysfs are text files,
it would be nice, if the "store" function called
during sysfs_write_file() gets a zero terminated
string / data.
The current implementation seems not to ensure this.
(But only if it is the first time the zeroed buffer
page is allocated.)
So the buffer can be scanned by sscanf() easily,
for example.
This patch simply sets a \0 char behind the
data in buffer->page.
Signed-off-by: Thomas Maier <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
---
fs/sysfs/file.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 298303b..95c1651 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -190,6 +190,9 @@ fill_write_buffer(struct sysfs_buffer *
count = PAGE_SIZE - 1;
error = copy_from_user(buffer->page,buf,count);
buffer->needs_read_fill = 1;
+ /* if buf is assumed to contain a string, terminate it by \0,
+ so e.g. sscanf() can scan the string easily */
+ buffer->page[count] = 0;
return error ? -EFAULT : count;
}
-
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