(OpenBSD) stat: unknown option -- c

[dspruell]

OpenBSD 6.8 amd64
clamav-unofficial-sigs v7.2.2 -> v7.2.5 (upgrade)

Noticed the following errors when running --upgrade:

# /usr/local/sbin/clamav-unofficial-sigs.sh --upgrade
################################################################################
 eXtremeSHOK.com ClamAV Unofficial Signature Updater
 Version: v7.2.2 (2020-12-20)
 Required Configuration Version: v95
 Copyright (c) Adrian Jon Kriel :: admin@extremeshok.com
################################################################################
Loading config: /etc/clamav-unofficial-sigs/master.conf
Loading config: /etc/clamav-unofficial-sigs/os.conf
Loading config: /etc/clamav-unofficial-sigs/user.conf
+++++++++++++++++++++++++++++++++++++++++++++++
NOTICE: GnuPG / signature verification disabled
+++++++++++++++++++++++++++++++++++++++++++++++
Checking for updates ...
***************************************
ALERT: Upgrading config from v95 to v97
***************************************
Downloading https://raw.githubusercontent.com/extremeshok/clamav-unofficial-sigs/master/config/master.conf
stat: unknown option -- c
usage: stat [-FLnq] [-f format | -l | -r | -s | -x] [-t timefmt] [file ...]
Running update process
chmod: invalid file mode: 
===========================================================================
ERROR: unable to set permissions on /etc/clamav-unofficial-sigs/master.conf
===========================================================================

GNU coreutils stat(1) supports -c --format=FORMAT but this is not portable; BSD uses -f format.

I think this may provide the same output format as coreutils stat(1):

stat -f "%OLp" /etc/clamav-unofficial-sigs/master.conf
644

This syntax seems to work in OpenBSD, FreeBSD, and macOS. It matches the manual pages for NetBSD, DragonFly BSD and MirBSD.