src/scripts/os-type

   1 #! /bin/sh
   2 # $Cambridge: exim/src/scripts/os-type,v 1.2 2005/02/17 10:04:41 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
  17 case "$EXIM_OSTYPE" in ?*) os="$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
  22 case "$os" in '') os=`uname -s`;; esac
  23
  24 # Identify Glibc systems under different names.
  25
  26 case "$os" in GNU|GNU/*|Linux) os=Linux;; esac
  27
  28 # It is believed that all systems respond to uname -s, but just in case
  29 # there is one that doesn't, use the shell's $OSTYPE variable. It is known
  30 # to be unhelpful for some systems (under IRIX is it "irix" and under BSDI
  31 # 3.0 it may be "386BSD") but those systems respond to uname -s, so this
  32 # doesn't matter.
  33
  34 case "$os" in '') os="$OSTYPE";; esac
  35
  36 # Failed to find OS type.
  37
  38 case "$os" in
  39 '') echo "" 1>&2
  40     echo "*** Failed to determine the operating system type." 1>&2
  41     echo "" 1>&2
  42     echo UnKnown
  43     exit 1;;
  44 esac
  45
  46 # Clean out gash characters
  47
  48 os=`echo $os | sed 's,[^-+_.a-zA-Z0-9],,g'`
  49
  50 # A value has been obtained for the os. Some massaging may be needed in
  51 # some cases to get a uniform set of values. In earlier versions of this
  52 # script, $OSTYPE was looked at before uname -s, and various shells set it
  53 # to things that are subtly different. It is possible that some of this may
  54 # no longer be needed.
  55
  56 case "$os" in
  57 aix*)       os=AIX;;
  58 AIX*)       os=AIX;;
  59 bsdi*)      os=BSDI;;
  60 BSDOS)      os=BSDI;;
  61 BSD_OS)     os=BSDI;;
  62 CYGWIN*)    os=CYGWIN;;
  63 dgux)       os=DGUX;;
  64 freebsd*)   os=FreeBSD;;
  65 gnu)        os=GNU;;
  66 Irix5)      os=IRIX;;
  67 Irix6)      os=IRIX6;;
  68 IRIX64)     os=IRIX6;;
  69 irix6.5)    os=IRIX65;;
  70 IRIX)       version=`uname -r`
  71             case "$version" in
  72             5*)  os=IRIX;;
  73             6.5) version=`uname -R | awk '{print $NF}'`
  74                  version=`echo $version | sed 's,[^-+_a-zA-Z0-9],,g'`
  75                  os=IRIX$version;;
  76             6*)  os=IRIX632;;
  77             esac;;
  78 HI-OSF1-MJ) os=HI-OSF;;
  79 HI-UXMPP)   os=HI-OSF;;
  80 hpux*)      os=HP-UX;;
  81 linux)      os=Linux;;
  82 linux-*)    os=Linux;;
  83 Linux-*)    os=Linux;;
  84 netbsd*)    os=NetBSD;;
  85 openbsd*)   os=OpenBSD;;
  86 osf1)       os=OSF1;;
  87 qnx*)       os=QNX;;
  88 solaris*)   os=SunOS5;;
  89 sunos4*)    os=SunOS4;;
  90 UnixWare)   os=Unixware7;;
  91 Ultrix)     os=ULTRIX;;
  92 ultrix*)    os=ULTRIX;;
  93 esac
  94
  95 # In the case of SunOS we need to distinguish between SunOS4 and Solaris (aka
  96 # SunOS5); in the case of BSDI we need to distinguish between versions 3 and 4;
  97 # in the case of HP-UX we need to distinguish between version 9 and later.
  98
  99 case "$os" in
 100 SunOS)  case `uname -r` in
 101         5*)     os="${os}5";;
 102         4*)     os="${os}4";;
 103         esac;;
 104
 105 BSDI)   case `uname -r` in
 106         3*)     os="${os}3";;
 107         4.2*)   os="${os}4.2";;
 108         4*)     os="${os}4";;
 109         esac;;
 110
 111 HP-UX)  case `uname -r` in
 112         A.09*)  os="${os}-9";;
 113         esac;;
 114 esac
 115
 116 # Need to distinguish Solaris from the version on the HAL (64bit sparc,
 117 # CC=hcc -DV7). Also need to distinguish different versions of the OS
 118 # for building different binaries.
 119
 120 case "$os" in
 121 SunOS5) case `uname -m` in
 122         sun4H)  os="${os}-hal";;
 123             *)  os="${os}-`uname -r`";;
 124         esac
 125         ;;
 126
 127 # In the case of Linux we need to distinguish which libc is used.
 128 # This is more cautious than it needs to be. In practice libc5 will always
 129 # be a symlink, and libc6 will always be a linker control file, but it's
 130 # easy enough to do a better check, and check the symlink destination or the
 131 # control file contents and make sure.
 132
 133 Linux)  if [ -L /usr/lib/libc.so ]; then
 134             if [ x"$(file /usr/lib/libc.so | grep "libc.so.5")"x != xx ]; then
 135                     os=Linux-libc5
 136             fi
 137         else
 138             if grep -q libc.so.5 /usr/lib/libc.so; then
 139                     os=Linux-libc5
 140             fi
 141         fi
 142         ;;
 143
 144 # In the case of NetBSD we need to distinguish between a.out, ELF
 145 # and COFF binary formats.  However, a.out and COFF are the same
 146 # for our purposes, so both of them are defined as "a.out".
 147 # Todd Vierling of Wasabi Systems reported that NetBSD/sh3 (the
 148 # only NetBSD port that uses COFF binary format) will switch to
 149 # ELF soon.
 150
 151 NetBSD) if echo __ELF__ | ${CC-cc} -E - | grep -q __ELF__ ; then
 152             # Non-ELF system
 153             os="NetBSD-a.out"
 154         fi
 155         ;;
 156
 157 esac
 158
 159 # If a generic OS name is requested, some further massaging is needed
 160 # for some systems.
 161
 162 if [ "$1" = '-generic' ]; then
 163   case "$os" in
 164   SunOS5*) os=SunOS5;;
 165   BSDI*)   os=BSDI;;
 166   IRIX65*) os=IRIX65;;
 167   esac
 168 fi
 169
 170 # OK, the script seems to have worked. Pass the value back.
 171
 172 echo "$os"
 173
 174 # End of os-type