Avoid certain functions in C/C++

Dr Andrew John Hughes ahughes at redhat.com
Fri Apr 8 00:49:40 UTC 2011

On 08:50 Wed 06 Apr     , Kelly O'Hair wrote:
> Just an FYI...
> Anyone working with C/C++ should be well aware of the functions we should be avoiding:
>   http://hub.opensolaris.org/bin/view/Community+Group+security/funclist
> Microsoft has used the term "banned" and has a much more extensive list:
>   http://msdn.microsoft.com/en-us/library/bb288454.aspx
> Unfortunately, we often cannot use the recommended replacements unless we know that the
> replacement is available on all platforms, however, some are fairly obvious, like using snprintf
> instead of sprintf.
> Functions like sprintf, vsprintf, strcat, strcpy, access, chmod, chown, lchown, chdir, ...
> all have know issues or have caused too many common mistakes over the years, we need to
> avoid the use of these functions.

Thanks for the list.  That'll surely prove a useful reference.

Have you considered using autoconf in OpenJDK?  It was pretty much designed for just this
scenario (checking the availability of functions).

> -kto

Andrew :)

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