On 09/21/2016 04:11 PM, William Roberts wrote:
> On Sep 21, 2016 13:06, "Stephen Smalley" <s...@tycho.nsa.gov
> <mailto:s...@tycho.nsa.gov>> wrote:
>> On 09/21/2016 03:57 PM, Roberts, William C wrote:
>> > Correction, it’s just fgets_unlocked, it appears to support the others.
>> Seems like a bug in bionic, but we can work around it by:
>> #ifdef ANDROID
>> #define fgets_unlocked(x) fgets(x)
>> #endif
>> in selinux_internal.h or some similar internal header.
>> It avoids unnecessary locking overheads when dealing with FILE
>> descriptors that are only used locally and guaranteed to not be shared
>> by multiple threads.
> I know what it does and why, but was it really that necessary?

The patch came from Red Hat.  Anyway, we use the _unlocked functions
throughout, and the fact that bionic supports all of them except that
one function suggests that we should just use a fix like the above
rather than dropping it.

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