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|
#! /bin/sh
# Shell script to determine the operating system type by various heuristics.
# 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 OSTYPE is set, use it. This allows a manual override.
case "$OSTYPE" in ?*) os="$OSTYPE";; esac
# For some shells running under IRIX the value of $OSTYPE is just "irix",
# which isn't very helpful. We know that uname works under IRIX, so in
# this case just unset os and fall through. BSDI 3.0 sets $OSTYPE to
# "386BSD" which is something other OS may also use, so unset that too.
case "$os" in
irix) os='';;
386BSD) os='';;
esac
# If os is still unset, try to get a value from the uname command.
case "$os" in '') os=`uname -s`;; esac
# ... what else can be tried? Insert here any other bright ideas that might
# come to mind ...
# Failed to find OS by automatic means.
case "$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 $os | sed 's,[^-+_.a-zA-Z0-9],,g'`
# A value has been obtained for the os. Some massaging may be needed in
# some cases to get a uniform set of values. Various shells set OSTYPE to
# things that aren't quite the same as each other. It is all a huge mess.
case "$os" in
aix*) os=AIX;;
AIX*) os=AIX;;
bsdi) os=BSDI;;
BSDOS) os=BSDI;;
BSD_OS) os=BSDI;;
dgux) os=DGUX;;
freebsd*) os=FreeBSD;;
Irix5) os=IRIX;;
Irix6) os=IRIX6;;
IRIX64) os=IRIX6;;
irix6.5) os=IRIX65;;
IRIX) version=`uname -r`
case "$version" in
5*) os=IRIX;;
6.5) os=IRIX65;;
6*) os=IRIX632;;
esac;;
HI-OSF1-MJ) os=HI-OSF;;
HI-UXMPP) os=HI-OSF;;
hpux*) os=HP-UX;;
linux) os=Linux;;
linux-*) os=Linux;;
Linux-*) os=Linux;;
openbsd*) os=OpenBSD;;
osf1) os=OSF1;;
qnx*) os=QNX;;
solaris*) os=SunOS5;;
sunos4) os=SunOS4;;
Ultrix) os=ULTRIX;;
ultrix*) os=ULTRIX;;
esac
# In the case of SunOS we need to distinguish between SunOS4 and SunOS5,
# and in the case of BSDI we need to distinguish between versions 3 and 4.
case "$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;;
esac
# Need to distinguish SunOS5 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="${os}-`uname -r`";;
esac;;
esac
# In the case of Linux we need to distinguish which libc is used.
# This is more cautious than it needs to be. In practice libc5 will always
# be a symlink, and libc6 will always be a linker control file, but it's
# easy enough to do a better check, and check the symlink destination or the
# control file contents and make sure.
case "$os" in
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
;;
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;;
esac
fi
# OK, the script seems to have worked. Pass the value back.
echo "$os"
# End of os-type
|
