#! /bin/sh
-# $Cambridge: exim/src/scripts/os-type,v 1.3 2005/04/06 10:53:47 ph10 Exp $
+
+# Copyright (c) The Exim Maintainters 2022
+# SPDX-License-Identifier: GPL-2.0-or-later
# Shell script to determine the operating system type. Some of the heuristics
# herein have accumulated over the years and may not strictly be needed now,
linux-*) os=Linux;;
Linux-*) os=Linux;;
netbsd*) os=NetBSD;;
+NetBSD*) os=NetBSD;;
openbsd*) os=OpenBSD;;
osf1) os=OSF1;;
qnx*) os=QNX;;
esac
;;
-# In the case of Linux we need to distinguish which libc is used.
-# This is more cautious than it needs to be. In practice libc5 will always
-# be a symlink, and libc6 will always be a linker control file, but it's
-# easy enough to do a better check, and check the symlink destination or the
-# control file contents and make sure.
-
-Linux) if [ -L /usr/lib/libc.so ]; then
- if [ x"$(file /usr/lib/libc.so | grep "libc.so.5")"x != xx ]; then
- os=Linux-libc5
- fi
- else
- if grep -q libc.so.5 /usr/lib/libc.so; then
- os=Linux-libc5
- fi
- fi
- ;;
+# In the case of Linux we used to distinguish which libc was used so that
+# the old libc5 was supported as well as the current glibc. This support
+# was giving some people problems, so it was removed in June 2005, under
+# the assumption that nobody would be using libc5 any more (it is over seven
+# years old).
# In the case of NetBSD we need to distinguish between a.out, ELF
# and COFF binary formats. However, a.out and COFF are the same