>Synopsis: Shared semaphores not supported despite sem_init.3
>Category: docummentation
>Environment:
System : OpenBSD 6.8
Details : OpenBSD 6.8 (GENERIC.MP) #4: Mon Jan 11 10:35:56 MST 2021
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
Architecture: OpenBSD.amd64
Machine : amd64
>Description:
The manpage for sem_init says that "A non-zero value for pshared
specifies a shared semaphore that can be used by multiple processes."
However, the code at /lib/librthread/rthread_sem.c suggests that non
zero values for pthread force sem_init() to return a failure instead, implying
this feature is not supported.
>How-To-RepeAt:
>Fix:
Have the man page specify that a pthread value other than 0 is not
currently supported. (SEM_INIT(3))
