src/scripts/os-type

   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
  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 # 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 $OSTYPE variable. It is known
  26 # to be unhelpful for some systems (under IRIX is it "irix" and under BSDI
  27 # 3.0 it may be "386BSD") but those systems respond to uname -s, so this
  28 # doesn't matter.
  29
  30 case "$os" in '') os="$OSTYPE";; esac
  31
  32 # Failed to find OS type.
  33
  34 case "$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;;
  40 esac
  41
  42 # Clean out gash characters
  43
  44 os=`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, $OSTYPE was looked at before uname -s, and various shells set it
  49 # to things that are subtly different. It is possible that some of this may
  50 # no longer be needed.
  51
  52 case "$os" in
  53 aix*)       os=AIX;;
  54 AIX*)       os=AIX;;
  55 bsdi*)      os=BSDI;;
  56 BSDOS)      os=BSDI;;
  57 BSD_OS)     os=BSDI;;
  58 CYGWIN*)    os=CYGWIN;;
  59 dgux)       os=DGUX;;
  60 freebsd*)   os=FreeBSD;;
  61 gnu)        os=GNU;;
  62 Irix5)      os=IRIX;;
  63 Irix6)      os=IRIX6;;
  64 IRIX64)     os=IRIX6;;
  65 irix6.5)    os=IRIX65;;
  66 IRIX)       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;;
  74 HI-OSF1-MJ) os=HI-OSF;;
  75 HI-UXMPP)   os=HI-OSF;;
  76 hpux*)      os=HP-UX;;
  77 linux)      os=Linux;;
  78 linux-*)    os=Linux;;
  79 Linux-*)    os=Linux;;
  80 netbsd*)    os=NetBSD;;
  81 openbsd*)   os=OpenBSD;;
  82 osf1)       os=OSF1;;
  83 qnx*)       os=QNX;;
  84 solaris*)   os=SunOS5;;
  85 sunos4*)    os=SunOS4;;
  86 UnixWare)   os=Unixware7;;
  87 Ultrix)     os=ULTRIX;;
  88 ultrix*)    os=ULTRIX;;
  89 esac
  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
  95 case "$os" in
  96 SunOS)  case `uname -r` in
  97         5*)     os="${os}5";;
  98         4*)     os="${os}4";;
  99         esac;;
 100
 101 BSDI)   case `uname -r` in
 102         3*)     os="${os}3";;
 103         4.2*)   os="${os}4.2";;
 104         4*)     os="${os}4";;
 105         esac;;
 106
 107 HP-UX)  case `uname -r` in
 108         A.09*)  os="${os}-9";;
 109         esac;;
 110 esac
 111
 112 # Need to distinguish Solaris from the version on the HAL (64bit sparc,
 113 # CC=hcc -DV7). Also need to distinguish different versions of the OS
 114 # for building different binaries.
 115
 116 case "$os" in
 117 SunOS5) 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
 129 Linux)  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
 147 NetBSD) if echo __ELF__ | ${CC-cc} -E - | grep -q __ELF__ ; then
 148             # Non-ELF system
 149             os="NetBSD-a.out"
 150         fi
 151         ;;
 152
 153 esac
 154
 155 # If a generic OS name is requested, some further massaging is needed
 156 # for some systems.
 157
 158 if [ "$1" = '-generic' ]; then
 159   case "$os" in
 160   SunOS5*) os=SunOS5;;
 161   BSDI*)   os=BSDI;;
 162   IRIX65*) os=IRIX65;;
 163   esac
 164 fi
 165
 166 # OK, the script seems to have worked. Pass the value back.
 167
 168 echo "$os"
 169
 170 # End of os-type