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|
#! /bin/sh
# 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,
# but they are left in under the principle of "If it ain't broke, don't fix
# it."
# For some OS there are two variants: a full name, which is used for the
# build directory, and a generic name, which is used to identify the OS-
# specific scripts, and which can be the same for different versions of
# the OS. Solaris 2 is one such OS. The option -generic specifies the
# latter type of output.
# If EXIM_OSTYPE is set, use it. This allows a manual override.
case "$EXIM_OSTYPE" in ?*) os="$EXIM_OSTYPE";; esac
# Otherwise, try to get a value from the uname command. Use an explicit
# option just in case there are any systems where -s is not the default.
case "$os" in '') os=`uname -s`;; esac
# It is believed that all systems respond to uname -s, but just in case
# there is one that doesn't, use the shell's $OSTYPE variable. It is known
# to be unhelpful for some systems (under IRIX is it "irix" and under BSDI
# 3.0 it may be "386BSD") but those systems respond to uname -s, so this
# doesn't matter.
case "$os" in '') os="$OSTYPE";; esac
# Failed to find OS type.
case "$os" in
'') echo "" 1>&2
echo "*** Failed to determine the operating system type." 1>&2
echo "" 1>&2
echo UnKnown
exit 1;;
esac
# Clean out gash characters
os=`echo $os | sed 's,[^-+_.a-zA-Z0-9],,g'`
# A value has been obtained for the os. Some massaging may be needed in
# some cases to get a uniform set of values. In earlier versions of this
# script, $OSTYPE was looked at before uname -s, and various shells set it
# to things that are subtly different. It is possible that some of this may
# no longer be needed.
case "$os" in
aix*) os=AIX;;
AIX*) os=AIX;;
bsdi*) os=BSDI;;
BSDOS) os=BSDI;;
BSD_OS) os=BSDI;;
dgux) os=DGUX;;
freebsd*) os=FreeBSD;;
gnu) os=GNU;;
Irix5) os=IRIX;;
Irix6) os=IRIX6;;
IRIX64) os=IRIX6;;
irix6.5) os=IRIX65;;
IRIX) version=`uname -r`
case "$version" in
5*) os=IRIX;;
6.5) version=`uname -R | awk '{print $NF}'`
version=`echo $version | sed 's,[^-+_a-zA-Z0-9],,g'`
os=IRIX$version;;
6*) os=IRIX632;;
esac;;
HI-OSF1-MJ) os=HI-OSF;;
HI-UXMPP) os=HI-OSF;;
hpux*) os=HP-UX;;
linux) os=Linux;;
linux-*) os=Linux;;
Linux-*) os=Linux;;
netbsd*) os=NetBSD;;
openbsd*) os=OpenBSD;;
osf1) os=OSF1;;
qnx*) os=QNX;;
solaris*) os=SunOS5;;
sunos4*) os=SunOS4;;
UnixWare) os=Unixware7;;
Ultrix) os=ULTRIX;;
ultrix*) os=ULTRIX;;
esac
# In the case of SunOS we need to distinguish between SunOS4 and Solaris (aka
# SunOS5); in the case of BSDI we need to distinguish between versions 3 and 4;
# in the case of HP-UX we need to distinguish between version 9 and later.
case "$os" in
SunOS) case `uname -r` in
5*) os="${os}5";;
4*) os="${os}4";;
esac;;
BSDI) case `uname -r` in
3*) os="${os}3";;
4*) os="${os}4";;
esac;;
HP-UX) case `uname -r` in
A.09*) os="${os}-9";;
esac;;
esac
# Need to distinguish Solaris from the version on the HAL (64bit sparc,
# CC=hcc -DV7). Also need to distinguish different versions of the OS
# for building different binaries.
case "$os" in
SunOS5) case `uname -m` in
sun4H) os="${os}-hal";;
*) os="${os}-`uname -r`";;
esac
;;
# In the case of Linux we need to distinguish which libc is used.
# This is more cautious than it needs to be. In practice libc5 will always
# be a symlink, and libc6 will always be a linker control file, but it's
# easy enough to do a better check, and check the symlink destination or the
# control file contents and make sure.
Linux) if [ -L /usr/lib/libc.so ]; then
if [ x"$(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 NetBSD we need to distinguish between a.out, ELF
# and COFF binary formats. However, a.out and COFF are the same
# for our purposes, so both of them are defined as "a.out".
# Todd Vierling of Wasabi Systems reported that NetBSD/sh3 (the
# only NetBSD port that uses COFF binary format) will switch to
# ELF soon.
NetBSD) if echo __ELF__ | ${CC-cc} -E - | grep -q __ELF__ ; then
# Non-ELF system
os="NetBSD-a.out"
fi
;;
esac
# If a generic OS name is requested, some further massaging is needed
# for some systems.
if [ "$1" = '-generic' ]; then
case "$os" in
SunOS5*) os=SunOS5;;
BSDI*) os=BSDI;;
IRIX65*) os=IRIX65;;
esac
fi
# OK, the script seems to have worked. Pass the value back.
echo "$os"
# End of os-type
|
