svn commit: r345563 - projects/fuse2/tests/sys/fs/fusefs

[Enji Cooper]

> On Mar 26, 2019, at 5:24 PM, Alan Somers <asomers at FreeBSD.org> wrote:
> 
> Author: asomers
> Date: Wed Mar 27 00:24:57 2019
> New Revision: 345563
> URL: https://svnweb.freebsd.org/changeset/base/345563
> 
> Log:
>  fusefs: fix a race condition in the allow_other test
> 
>  The test could occasionally hang if the parent's SIGUSR2 signal arrived
>  before the child had pause()d.  Using POSIX semaphores precludes that
>  possibility.
> 
>  Sponsored by:	The FreeBSD Foundation

…

> +	sem = (sem_t*)mmap(NULL, sizeof(*sem), mprot, mflags, -1, 0);
> +	ASSERT_NE(NULL, sem) << strerror(errno);

mmap will return “MAP_FAILED”, not NULL, on error.

Thanks,
-Enji