diff options
| author | Bart Van Assche <bvanassche@acm.org> | 2010-12-21 13:09:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-03 15:10:18 -0800 |
| commit | d3f70befd9a6ab79413f303109e2c701472e2785 (patch) | |
| tree | 1a271b9744ac3b42355026e2cef7d9f97f9e8537 /Documentation | |
| parent | 5480bcdd60603f834b7c0c252213ca1932c28bfc (diff) | |
docs/sysfs: show() methods should use scnprintf().
Since snprintf() may return a value that exceeds its second argument,
show() methods should use scnprintf() instead of snprintf(). This patch
updates the example in the sysfs documentation accordingly.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/sysfs.txt | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt index 2ed95f9b770a..f806e50aaa63 100644 --- a/Documentation/filesystems/sysfs.txt +++ b/Documentation/filesystems/sysfs.txt @@ -210,9 +210,9 @@ Other notes: is 4096. - show() methods should return the number of bytes printed into the - buffer. This is the return value of snprintf(). + buffer. This is the return value of scnprintf(). -- show() should always use snprintf(). +- show() should always use scnprintf(). - store() should return the number of bytes used from the buffer. If the entire buffer has been used, just return the count argument. @@ -231,7 +231,7 @@ A very simple (and naive) implementation of a device attribute is: static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) { - return snprintf(buf, PAGE_SIZE, "%s\n", dev->name); + return scnprintf(buf, PAGE_SIZE, "%s\n", dev->name); } static ssize_t store_name(struct device *dev, struct device_attribute *attr, |