Merge from EXISCAN branch.
[exim.git] / src / scripts / os-type
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1#! /bin/sh
2# $Cambridge: exim/src/scripts/os-type,v 1.1 2004/10/06 15:07:40 ph10 Exp $
3
4# Shell script to determine the operating system type. Some of the heuristics
5# herein have accumulated over the years and may not strictly be needed now,
6# but they are left in under the principle of "If it ain't broke, don't fix
7# it."
8
9# For some OS there are two variants: a full name, which is used for the
10# build directory, and a generic name, which is used to identify the OS-
11# specific scripts, and which can be the same for different versions of
12# the OS. Solaris 2 is one such OS. The option -generic specifies the
13# latter type of output.
14
15# If EXIM_OSTYPE is set, use it. This allows a manual override.
16
17case "$EXIM_OSTYPE" in ?*) os="$EXIM_OSTYPE";; esac
18
19# Otherwise, try to get a value from the uname command. Use an explicit
20# option just in case there are any systems where -s is not the default.
21
22case "$os" in '') os=`uname -s`;; esac
23
24# It is believed that all systems respond to uname -s, but just in case
25# there is one that doesn't, use the shell's $OSTYPE variable. It is known
26# to be unhelpful for some systems (under IRIX is it "irix" and under BSDI
27# 3.0 it may be "386BSD") but those systems respond to uname -s, so this
28# doesn't matter.
29
30case "$os" in '') os="$OSTYPE";; esac
31
32# Failed to find OS type.
33
34case "$os" in
35'') echo "" 1>&2
36 echo "*** Failed to determine the operating system type." 1>&2
37 echo "" 1>&2
38 echo UnKnown
39 exit 1;;
40esac
41
42# Clean out gash characters
43
44os=`echo $os | sed 's,[^-+_.a-zA-Z0-9],,g'`
45
46# A value has been obtained for the os. Some massaging may be needed in
47# some cases to get a uniform set of values. In earlier versions of this
48# script, $OSTYPE was looked at before uname -s, and various shells set it
49# to things that are subtly different. It is possible that some of this may
50# no longer be needed.
51
52case "$os" in
53aix*) os=AIX;;
54AIX*) os=AIX;;
55bsdi*) os=BSDI;;
56BSDOS) os=BSDI;;
57BSD_OS) os=BSDI;;
58CYGWIN*) os=CYGWIN;;
59dgux) os=DGUX;;
60freebsd*) os=FreeBSD;;
61gnu) os=GNU;;
62Irix5) os=IRIX;;
63Irix6) os=IRIX6;;
64IRIX64) os=IRIX6;;
65irix6.5) os=IRIX65;;
66IRIX) version=`uname -r`
67 case "$version" in
68 5*) os=IRIX;;
69 6.5) version=`uname -R | awk '{print $NF}'`
70 version=`echo $version | sed 's,[^-+_a-zA-Z0-9],,g'`
71 os=IRIX$version;;
72 6*) os=IRIX632;;
73 esac;;
74HI-OSF1-MJ) os=HI-OSF;;
75HI-UXMPP) os=HI-OSF;;
76hpux*) os=HP-UX;;
77linux) os=Linux;;
78linux-*) os=Linux;;
79Linux-*) os=Linux;;
80netbsd*) os=NetBSD;;
81openbsd*) os=OpenBSD;;
82osf1) os=OSF1;;
83qnx*) os=QNX;;
84solaris*) os=SunOS5;;
85sunos4*) os=SunOS4;;
86UnixWare) os=Unixware7;;
87Ultrix) os=ULTRIX;;
88ultrix*) os=ULTRIX;;
89esac
90
91# In the case of SunOS we need to distinguish between SunOS4 and Solaris (aka
92# SunOS5); in the case of BSDI we need to distinguish between versions 3 and 4;
93# in the case of HP-UX we need to distinguish between version 9 and later.
94
95case "$os" in
96SunOS) case `uname -r` in
97 5*) os="${os}5";;
98 4*) os="${os}4";;
99 esac;;
100
101BSDI) case `uname -r` in
102 3*) os="${os}3";;
103 4.2*) os="${os}4.2";;
104 4*) os="${os}4";;
105 esac;;
106
107HP-UX) case `uname -r` in
108 A.09*) os="${os}-9";;
109 esac;;
110esac
111
112# Need to distinguish Solaris from the version on the HAL (64bit sparc,
113# CC=hcc -DV7). Also need to distinguish different versions of the OS
114# for building different binaries.
115
116case "$os" in
117SunOS5) case `uname -m` in
118 sun4H) os="${os}-hal";;
119 *) os="${os}-`uname -r`";;
120 esac
121 ;;
122
123# In the case of Linux we need to distinguish which libc is used.
124# This is more cautious than it needs to be. In practice libc5 will always
125# be a symlink, and libc6 will always be a linker control file, but it's
126# easy enough to do a better check, and check the symlink destination or the
127# control file contents and make sure.
128
129Linux) if [ -L /usr/lib/libc.so ]; then
130 if [ x"$(file /usr/lib/libc.so | grep "libc.so.5")"x != xx ]; then
131 os=Linux-libc5
132 fi
133 else
134 if grep -q libc.so.5 /usr/lib/libc.so; then
135 os=Linux-libc5
136 fi
137 fi
138 ;;
139
140# In the case of NetBSD we need to distinguish between a.out, ELF
141# and COFF binary formats. However, a.out and COFF are the same
142# for our purposes, so both of them are defined as "a.out".
143# Todd Vierling of Wasabi Systems reported that NetBSD/sh3 (the
144# only NetBSD port that uses COFF binary format) will switch to
145# ELF soon.
146
147NetBSD) if echo __ELF__ | ${CC-cc} -E - | grep -q __ELF__ ; then
148 # Non-ELF system
149 os="NetBSD-a.out"
150 fi
151 ;;
152
153esac
154
155# If a generic OS name is requested, some further massaging is needed
156# for some systems.
157
158if [ "$1" = '-generic' ]; then
159 case "$os" in
160 SunOS5*) os=SunOS5;;
161 BSDI*) os=BSDI;;
162 IRIX65*) os=IRIX65;;
163 esac
164fi
165
166# OK, the script seems to have worked. Pass the value back.
167
168echo "$os"
169
170# End of os-type