src/scripts/os-type

   1 #! /bin/sh
   2 # $Cambridge: exim/src/scripts/os-type,v 1.6 2009/11/13 12:18:35 nm4 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) os=GNU;; esac
  27 case "$os" in GNU/*|Linux) os=Linux;; esac
  28
  29 # It is believed that all systems respond to uname -s, but just in case
  30 # there is one that doesn't, use the shell's $OSTYPE variable. It is known
  31 # to be unhelpful for some systems (under IRIX is it "irix" and under BSDI
  32 # 3.0 it may be "386BSD") but those systems respond to uname -s, so this
  33 # doesn't matter.
  34
  35 case "$os" in '') os="$OSTYPE";; esac
  36
  37 # Failed to find OS type.
  38
  39 case "$os" in
  40 '') echo "" 1>&2
  41     echo "*** Failed to determine the operating system type." 1>&2
  42     echo "" 1>&2
  43     echo UnKnown
  44     exit 1;;
  45 esac
  46
  47 # Clean out gash characters
  48
  49 os=`echo $os | sed 's,[^-+_.a-zA-Z0-9],,g'`
  50
  51 # A value has been obtained for the os. Some massaging may be needed in
  52 # some cases to get a uniform set of values. In earlier versions of this
  53 # script, $OSTYPE was looked at before uname -s, and various shells set it
  54 # to things that are subtly different. It is possible that some of this may
  55 # no longer be needed.
  56
  57 case "$os" in
  58 aix*)       os=AIX;;
  59 AIX*)       os=AIX;;
  60 bsdi*)      os=BSDI;;
  61 BSDOS)      os=BSDI;;
  62 BSD_OS)     os=BSDI;;
  63 CYGWIN*)    os=CYGWIN;;
  64 dgux)       os=DGUX;;
  65 freebsd*)   os=FreeBSD;;
  66 gnu)        os=GNU;;
  67 Irix5)      os=IRIX;;
  68 Irix6)      os=IRIX6;;
  69 IRIX64)     os=IRIX6;;
  70 irix6.5)    os=IRIX65;;
  71 IRIX)       version=`uname -r`
  72             case "$version" in
  73             5*)  os=IRIX;;
  74             6.5) version=`uname -R | awk '{print $NF}'`
  75                  version=`echo $version | sed 's,[^-+_a-zA-Z0-9],,g'`
  76                  os=IRIX$version;;
  77             6*)  os=IRIX632;;
  78             esac;;
  79 HI-OSF1-MJ) os=HI-OSF;;
  80 HI-UXMPP)   os=HI-OSF;;
  81 hpux*)      os=HP-UX;;
  82 linux)      os=Linux;;
  83 linux-*)    os=Linux;;
  84 Linux-*)    os=Linux;;
  85 netbsd*)    os=NetBSD;;
  86 NetBSD*)    os=NetBSD;;
  87 openbsd*)   os=OpenBSD;;
  88 osf1)       os=OSF1;;
  89 qnx*)       os=QNX;;
  90 solaris*)   os=SunOS5;;
  91 sunos4*)    os=SunOS4;;
  92 UnixWare)   os=Unixware7;;
  93 Ultrix)     os=ULTRIX;;
  94 ultrix*)    os=ULTRIX;;
  95 esac
  96
  97 # In the case of SunOS we need to distinguish between SunOS4 and Solaris (aka
  98 # SunOS5); in the case of BSDI we need to distinguish between versions 3 and 4;
  99 # in the case of HP-UX we need to distinguish between version 9 and later.
 100
 101 case "$os" in
 102 SunOS)  case `uname -r` in
 103         5*)     os="${os}5";;
 104         4*)     os="${os}4";;
 105         esac;;
 106
 107 BSDI)   case `uname -r` in
 108         3*)     os="${os}3";;
 109         4.2*)   os="${os}4.2";;
 110         4*)     os="${os}4";;
 111         esac;;
 112
 113 HP-UX)  case `uname -r` in
 114         A.09*)  os="${os}-9";;
 115         esac;;
 116 esac
 117
 118 # Need to distinguish Solaris from the version on the HAL (64bit sparc,
 119 # CC=hcc -DV7). Also need to distinguish different versions of the OS
 120 # for building different binaries.
 121
 122 case "$os" in
 123 SunOS5) case `uname -m` in
 124         sun4H)  os="${os}-hal";;
 125             *)  os="${os}-`uname -r`";;
 126         esac
 127         ;;
 128
 129 # In the case of Linux we used to distinguish which libc was used so that
 130 # the old libc5 was supported as well as the current glibc. This support
 131 # was giving some people problems, so it was removed in June 2005, under
 132 # the assumption that nobody would be using libc5 any more (it is over seven
 133 # years old).
 134
 135 # In the case of NetBSD we need to distinguish between a.out, ELF
 136 # and COFF binary formats.  However, a.out and COFF are the same
 137 # for our purposes, so both of them are defined as "a.out".
 138 # Todd Vierling of Wasabi Systems reported that NetBSD/sh3 (the
 139 # only NetBSD port that uses COFF binary format) will switch to
 140 # ELF soon.
 141
 142 NetBSD) if echo __ELF__ | ${CC-cc} -E - | grep -q __ELF__ ; then
 143         # Non-ELF system
 144         os="NetBSD-a.out"
 145         fi
 146         ;;
 147
 148 esac
 149
 150 # If a generic OS name is requested, some further massaging is needed
 151 # for some systems.
 152
 153 if [ "$1" = '-generic' ]; then
 154   case "$os" in
 155   SunOS5*) os=SunOS5;;
 156   BSDI*)   os=BSDI;;
 157   IRIX65*) os=IRIX65;;
 158   esac
 159 fi
 160
 161 # OK, the script seems to have worked. Pass the value back.
 162
 163 echo "$os"
 164
 165 # End of os-type