Hi Stuart, greetings all.

As per https://man.openbsd.org/sem_init.3

sem_init(sem_t *sem, int pshared, unsigned int value)
A non-zero value for pshared specifies a shared semaphore that can be used by 
multiple processes, which this implementation is not capable of.

Please consider having this patch in file-attach (patch-ualpn_c) applied so the 
alpn daemon can at least be used with a single worker (default is to use 2 
workers) on openbsd. Tested on 7.2 .

This fixes the EPERM error message on startup:
frontend# /tmp/ualpn -v -d -u nobody:nogroup -b 
127.0.0.1@10443<mailto:127.0.0.1@10443> -c 
127.0.0.1@8443<mailto:127.0.0.1@8443> -S 666
Dec 06 18:29:39 ualpn/53393: [NOTICE] version 1.7.1 starting
Dec 06 18:29:39 ualpn/53393: [NOTICE] control interface listening to 
unix:///var/run/ualpn.sock
Dec 06 18:29:39 ualpn/53393: [ERR] sem_init failed: Operation not permitted
Dec 06 18:29:39 ualpn/88515: [ERR] daemon failed to start

Once applied:
frontend# /tmp/ualpn -v -d -u nobody:nogroup -b 
127.0.0.1@10443<mailto:127.0.0.1@10443> -c 
127.0.0.1@8443<mailto:127.0.0.1@8443> -S 666 -n 1
Dec 06 18:29:42 ualpn/41102: [NOTICE] version 1.7.1 starting
Dec 06 18:29:42 ualpn/41102: [NOTICE] control interface listening to 
unix:///var/run/ualpn.sock
Dec 06 18:29:42 ualpn/41102: [NOTICE] frontend listening to 127.0.0.1:10443
Dec 06 18:29:42 ualpn/41102: [NOTICE] changing group (nogroup)
Dec 06 18:29:42 ualpn/41102: [NOTICE] changing user (nobody)
Dec 06 18:29:42 ualpn/33466: [NOTICE] daemon started (pid 41102)

Thank you

Attachment: patch-ualpn_c
Description: patch-ualpn_c

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