#!/bin/sh
##
##  shtool -- Portable Shell Tool
##  Copyright (c) 1999 Ralf S. Engelschall, All Rights Reserved. 
##  Version 1.2.3 (06-May-1999)
##

##
##  LICENSE
##  =======
##
##  ====================================================================
##  Copyright (c) 1994-1999 Ralf S. Engelschall. All rights reserved.
## 
##  Redistribution and use in source and binary forms, with or without
##  modification, are permitted provided that the following conditions
##  are met:
## 
##  1. Redistributions of source code must retain the above copyright
##     notice, this list of conditions and the following disclaimer. 
## 
##  2. Redistributions in binary form must reproduce the above copyright
##     notice, this list of conditions and the following disclaimer in
##     the documentation and/or other materials provided with the
##     distribution.
## 
##  3. All advertising materials mentioning features or use of this
##     software must display the following acknowledgment:
##     "This product includes software developed by
##      Ralf S. Engelschall <rse@engelschall.com>."
## 
##  4. Redistributions of any form whatsoever must retain the following
##     acknowledgment:
##     "This product includes software developed by
##      Ralf S. Engelschall <rse@engelschall.com>."
## 
##  THIS SOFTWARE IS PROVIDED BY RALF S. ENGELSCHALL ``AS IS'' AND ANY
##  EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
##  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
##  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL RALF S. ENGELSCHALL OR
##  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
##  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
##  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
##  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
##  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
##  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
##  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
##  OF THE POSSIBILITY OF SUCH DAMAGE.
##  ====================================================================
##
##  This product includes software developed by the Apache Group
##  for use in the Apache HTTP server project (http://www.apache.org/)
##

##
##  Usage: shtool <command> [<options>] [<args>]
##
##  Available commands:
##  echo         Print command with optional construct expansion
##  table        Pretty print a field-sperarated list as a table
##  prop         Display a process indication though a running propeller
##  move         Move files with simultan substitution and optimized movement
##  install      Install a program, script or datafile
##  mkdir        Make a directory
##  mkln         Extended ln(1) command which calculates relative links
##  mkshadow     Create a shadow tree
##  fixperm      Fix file permission inside a source tree
##  guessos      Simple OS/Platform guesser
##  arx          Archive (ar) wrapper command.
##  slo          Separate Linker Options by library class
##  version      Generate and maintain a version information file
##  path         Deal with $PATH variables
##

if [ $# -eq 0 ]; then
    echo "$0:Error: Invalid command line" 1>&2
fi
if [ $# -eq 0 -o ".$1" = .-h ]; then
    echo "$0:Usage: shtool <command> [<options>] [<args>]" 
    echo ""
    echo "Available commands are:"
    echo ""
    echo '  echo       [-n] [-e] <string> [<string> ...]'
    echo '  table      [-F <sep>] [-w <width>] [-c <cols>] [-s <strip>]'
    echo '             <str><sep><str><sep><str>...'
    echo '  prop       [-p <prefix>]'
    echo '  move       [-e] [-p] <src> <dst>'
    echo '  install    [-c] [-m <mode>] [-o <owner>] [-g <group>]'
    echo '             [-s] [-S <stripflags>] [-e <extension>] <file> <dir-or-file>'
    echo '  mkdir      [-f] [-p] [-m <mode>] <dir> [<dir> ...]'
    echo '  mkln       [-v] [-f] [-s] <src> [<src> ...] <dst>'
    echo '  mkshadow   <srcdir> <dstdir>'
    echo '  fixperm    <file-or-dir> [<file-or-dir> ...]'
    echo '  guessos    '
    echo '  arx        [-v] <ar-prg> <ar-cmd> <archive> <file> [<file>'
    echo '             ...]'
    echo '  slo        -Lxx -lxx [ -Lxx -lxx ... ]'
    echo '  version    [-l <lang>] [-n <name>] [-p <prefix>] [-s'
    echo '             <version>] [-i <knob>] [-d <type>] <file>'
    echo '  path       [-s] [-r] [-d] [-b] [-m] [-p <path>] <string>'
    echo '             [<string> ...]'
    echo ""
    exit 1
fi
if [ ".$1" = .-v ]; then
    echo "shtool 1.2.3 (06-May-1999)"
    exit 0
fi
util=$1
shift
case $util in

echo )
    #
    #   command line parsing
    #
    newline="\n"
    expand=no
    while [ ".$1" != . ]; do
        case $1 in
            -n ) newline=""; shift; continue ;;
            -e ) expand=yes; shift; continue ;;
            *  ) break ;;
        esac
    done
    text="$*"
    
    #
    #   check for broken escape sequence expansion
    #
    seo=''
    bytes=`echo '\1' | wc -c | awk '{ printf("%s", $1); }'`
    if [ ".$bytes" != .3 ]; then
        bytes=`echo -E '\1' | wc -c | awk '{ printf("%s", $1); }'`
        if [ ".$bytes" = .3 ]; then
            seo='-E'
        fi
    fi
    
    #
    #   determine terminal bold sequence
    #
    term_bold='' 
    tern_norm=''
    if [ $expand = yes -a ".`echo $text | egrep '%[Bb]'`" != . ]; then
        case $TERM in
            xterm|xterm*|vt220|vt220*)
                term_bold=`echo dummy | awk '{ printf("%c%c%c%c", 27, 91, 49, 109); }'`
                term_norm=`echo dummy | awk '{ printf("%c%c%c", 27, 91, 109); }'`
                ;;
            vt100|vt100*)
                term_bold=`echo dummy | awk '{ printf("%c%c%c%c%c%c", 27, 91, 49, 109, 0, 0); }'`
                term_norm=`echo dummy | awk '{ printf("%c%c%c%c%c", 27, 91, 109, 0, 0); }'`
                ;;
        esac
        if [ ".$term_bold" = . -o ".$term_norm" = . ]; then
            md="`tput md 2>/dev/null`"
            me="`tput me 2>/dev/null`"
            if [ ".$md" != . -a ".$me" != . ]; then
                term_bold="$xmd" 
                term_norm="$xme"
            fi
        fi
        if [ ".$term_bold" = . -o ".$term_norm" = . ]; then
            echo "$0:Warning: unable to determine terminal sequence for bold mode" 1>&2
        fi
    fi
    
    #
    #   determine user name
    #
    username=''
    if [ $expand = yes -a ".`echo $text | egrep '%[uU]'`" != . ]; then
        username="$LOGNAME"
        if [ ".$username" = . ]; then
            username="$USER"
            if [ ".$username" = . ]; then
                username="`(whoami) 2>/dev/null |\
                           awk '{ printf("%s", $1); }'`"
                if [ ".$username" = . ]; then
                    username="`(who am i) 2>/dev/null |\
                               awk '{ printf("%s", $1); }'`"
                    if [ ".$username" = . ]; then
                        username='unknown'
                    fi
                fi
            fi
        fi
    fi
    
    #
    #   determine user id
    #
    userid=''
    if [ $expand = yes -a ".`echo $text | egrep '%U'`" != . ]; then
        userid="`(id -u) 2>/dev/null`"
        if [ ".$userid" = . ]; then
            str="`(id) 2>/dev/null`"
            if [ ".`echo $str | grep '^uid[ 	]*=[ 	]*[0-9]*('`" != . ]; then
                userid=`echo $str | sed -e 's/^uid[ 	]*=[ 	]*//' -e 's/(.*//'`
            fi
            if [ ".$userid" = . ]; then
                userid=`egrep "^${username}:" /etc/passwd 2>/dev/null | \
                        sed -e 's/[^:]*:[^:]*://' -e 's/:.*$//'`
                if [ ".$userid" = . ]; then
                    userid=`(ypcat passwd) 2>/dev/null |
                            egrep "^${username}:" | \
                            sed -e 's/[^:]*:[^:]*://' -e 's/:.*$//'`
                    if [ ".$userid" = . ]; then
                        userid='?'
                    fi
                fi
            fi
        fi
    fi
    
    #
    #   determine host name
    #
    hostname=''
    if [ $expand = yes -a ".`echo $text | egrep '%h'`" != . ]; then
        hostname="`(uname -n) 2>/dev/null |\
                   awk '{ printf("%s", $1); }'`"
        if [ ".$hostname" = . ]; then
            hostname="`(hostname) 2>/dev/null |\
                       awk '{ printf("%s", $1); }'`"
            if [ ".$hostname" = . ]; then
                hostname='unknown'
            fi
        fi
        case $hostname in
            *.* )
                domainname=".`echo $hostname | cut -d. -f2-`"
                hostname="`echo $hostname | cut -d. -f1`"
                ;;
        esac
    fi
    
    #
    #   determine domain name
    #
    domainname=''
    if [ $expand = yes -a ".`echo $text | egrep '%d'`" != . ]; then
        if [ ".$domainname" = . ]; then
            if [ -f /etc/resolv.conf ]; then
                domainname="`egrep '^[ 	]*domain' /etc/resolv.conf | head -1 |\
                             sed -e 's/.*domain//' \
                                 -e 's/^[ 	]*//' -e 's/^ *//' -e 's/^	*//' \
                                 -e 's/^\.//' -e 's/^/./' |\
                             awk '{ printf("%s", $1); }'`"
                if [ ".$domainname" = . ]; then
                    domainname="`egrep '^[ 	]*search' /etc/resolv.conf | head -1 |\
                                 sed -e 's/.*search//' \
                                     -e 's/^[ 	]*//' -e 's/^ *//' -e 's/^	*//' \
                                     -e 's/ .*//' -e 's/	.*//' \
                                     -e 's/^\.//' -e 's/^/./' |\
                                 awk '{ printf("%s", $1); }'`"
                fi
            fi
        fi
    fi
    
    #
    #   determine current time
    #
    time_day=''
    time_month=''
    time_year=''
    time_monthname=''
    if [ $expand = yes -a ".`echo $text | egrep '%[DMYm]'`" != . ]; then
        time_day="`date '+%d' | awk '{ printf("%s", $1); }'`"
        time_month="`date '+%m' | awk '{ printf("%s", $1); }'`"
        time_year="`date '+%Y' 2>/dev/null | awk '{ printf("%s", $1); }'`"
        if test ".$time_year" = .; then
            time_year="`date '+%y' | awk '{ printf("%s", $1); }'`"
            case $time_year in
                9[0-9]*) time_year="19$time_year" ;;
                      *) time_year="20$time_year" ;;
            esac
        fi
        case $time_month in
            1|01) time_monthname='Jan' ;;
            2|02) time_monthname='Feb' ;;
            3|03) time_monthname='Mar' ;;
            4|04) time_monthname='Apr' ;;
            5|05) time_monthname='May' ;;
            6|06) time_monthname='Jun' ;;
            7|07) time_monthname='Jul' ;;
            8|08) time_monthname='Aug' ;;
            9|09) time_monthname='Sep' ;;
              10) time_monthname='Oct' ;;
              11) time_monthname='Nov' ;;
              12) time_monthname='Dec' ;;
        esac
    fi
    
    #
    #   expand special ``%x'' constructs
    #
    if [ $expand = yes ]; then
        text=`echo $seo "$text" |\
              sed -e "s;%B;${term_bold};g" \
                  -e "s;%b;${term_norm};g" \
                  -e "s;%u;${username};g" \
                  -e "s;%U;${userid};g" \
                  -e "s;%h;${hostname};g" \
                  -e "s;%d;${domainname};g" \
                  -e "s;%D;${time_day};g" \
                  -e "s;%M;${time_month};g" \
                  -e "s;%Y;${time_year};g" \
                  -e "s;%m;${time_monthname};g"`
    fi
    
    #
    #   create output
    #
    echo dummy |\
    awk '{ printf("%s%s", TEXT, NEWLINE); }' \
        TEXT="$text" NEWLINE="$newline"
;;

table )
    #
    #   command line parsing
    #
    width=15
    cols=3
    sep=':'
    strip=79
    while [ ".$1" != . ]; do
        case $1 in
            -F ) sep="$2";   shift; shift; continue ;;
            -w ) width="$2"; shift; shift; continue ;;
            -c ) cols="$2";  shift; shift; continue ;;
            -s ) strip="$2";   shift; shift; continue ;;
            *  ) break ;;
        esac
    done
    case x$sep in
        x? ) ;;
        *  ) echo "$0:Error: Invalid seperator (one char allowed only)" 1>&2; exit 1 ;;
    esac
    if [ $cols -gt 4 ]; then
        echo "$0:Error: Invalid number of colums (1..4 allowed only)" 1>&2
        exit 1
    fi
    
    #
    #   split the list into a table
    #
    list=`
        IFS="$sep"
        for entry in $*; do
            if [ ".$entry" != . ]; then
                echo "$entry"
            fi
        done |\
        awk "
            BEGIN { list = \"\"; n = 0; }
            { 
                list = list \\$1;
                n = n + 1;
                if (n < $cols) {
                    list = list \":\";
                }
                if (n == $cols) {
                    list = list \"\\n\";
                    n = 0;
                }
            }
            END { print list; }
         "
    `
    
    #
    #   format table cells and make sure table 
    #   doesn't exceed maximum width
    #
    IFS='
    '
    for entry in $list; do
        case $cols in
            1 ) eval "echo \"\${entry}\" | awk -F: '{ printf(\"%-${width}s\\n\", \$1); }'" ;;
            2 ) eval "echo \"\${entry}\" | awk -F: '{ printf(\"%-${width}s %-${width}s\\n\", \$1, \$2); }'" ;;
            3 ) eval "echo \"\${entry}\" | awk -F: '{ printf(\"%-${width}s %-${width}s %-${width}s\\n\", \$1, \$2, \$3); }'" ;;
            4 ) eval "echo \"\${entry}\" | awk -F: '{ printf(\"%-${width}s %-${width}s %-${width}s %-${width}s\\n\", \$1, \$2, \$3, \$4); }'" ;;
        esac
    done |\
    awk "{ 
        if (length(\$0) > $strip) { 
            printf(\"%s\\n\", substr(\$0, 0, $strip-1));
        } else { 
            print \$0; 
        }
    }"
;;

prop )
    #
    #   command line parsing
    #
    prefix=""
    while [ ".$1" != . ]; do
        case $1 in
            -p ) prefix="$2"; shift; shift; continue ;;
            *  ) break ;;
        esac
    done
    if [ $# -gt 0 ]; then
        echo "$0:Error: too much arguments" 1>&2
        exit 1
    fi
    
    perl=''
    for dir in `echo $PATH | sed -e 's/:/ /g'` .; do
        if [ -f "$dir/perl" ]; then
            perl="$dir/perl"
            break
        fi
    done
    if [ ".$perl" != . ]; then
        #   Perl is preferred because writing to STDERR in
        #   Perl really writes immediately as one would expect
        $perl -e '
            @p = ("|","/","-","\\"); 
            $i = 0; 
            while (<STDIN>) { 
                printf(STDERR "\r%s...%s\b", $ARGV[0], $p[$i++]);
                $i = 0 if ($i > 3); 
            }
            printf(STDERR "\r%s    \n", $ARGV[0]);
        ' "$prefix"
    else
        #   But when Perl doesn't exists we use Awk even
        #   some Awk's buffer even the /dev/stderr writing :-(
        awk '
            BEGIN { 
                split("|#/#-#\\", p, "#");
                i = 1; 
            } 
            { 
                printf("\r%s%c\b", prefix, p[i++]) > "/dev/stderr"; 
                if (i > 4) { i = 1; } 
            }
            END {
                printf("\r%s    \n", prefix) > "/dev/stderr";
            }
        ' "prefix=$prefix" 
    fi
;;

move )
    #
    #   command line parsing
    #
    expand=no
    preserve=no
    while [ ".$1" != . ]; do
        case $1 in
            -e ) expand=yes ; shift; continue ;;
            -p ) preserve=yes ; shift; continue ;;
            *  ) break ;;
        esac
    done
    if [ $# -ne 2 ]; then
        echo "$0:Usage: move [-e] [-p] <src> <dst>" 1>&2
        exit 1
    fi
    src=$1
    dst=$2
    
    #
    #   consistency checks
    #
    if [ ".$src" = . -o ".$dst" = . ]; then
        echo "$0:Error: Invalid arguments" 1>&2
        exit 1
    fi
    if [ ".$src" = ".$dst" ]; then
        echo "$0:Error: Source and destination files are the same" 1>&2
        exit 1
    fi
    expsrc="$src"
    if [ $expand = yes ]; then
        expsrc="`echo $expsrc`"
    fi
    if [ $expand = yes ]; then
        if [ ".`echo "$src" | sed -e 's;^.*\\*.*$;;'`" = ".$src" ]; then
            echo "$0:Error: Source doesn't contain wildcard ('*'): $dst" 1>&2
            exit 1
        fi
        if [ ".`echo "$dst" | sed -e 's;^.*%[1-9].*$;;'`" = ".$dst" ]; then
            echo "$0:Error: Destination doesn't contain substitution ('%N'): $dst" 1>&2
            exit 1
        fi
        if [ ".$expsrc" = ".$src" ]; then
            echo "$0:Error: Sources not found or no asterisk : $src" 1>&2
            exit 1
        fi
    else
        if [ ! -r "$src" ]; then
            echo "$0:Error: Source not found: $src" 1>&2
            exit 1
        fi
    fi
    
    #
    #   determine substitution patterns
    #
    if [ $expand = yes ]; then
        srcpat=`echo "$src" | sed -e 's/\\./\\\\./g' -e 's/;/\\;/g' -e 's;\\*;\\\\(.*\\\\);g'`
        dstpat=`echo "$dst" | sed -e 's;%\([1-9]\);\\\\\1;g'`
    fi
    
    #
    #   iterate over source(s)
    #
    for onesrc in $expsrc; do
        if [ $expand = yes ]; then
            onedst=`echo $onesrc | sed -e "s;$srcpat;$dstpat;"`
        else
            onedst="$dst"
        fi
        errorstatus=0
        if [ -r $onedst ]; then
            if cmp -s $onesrc $onedst; then
                rm -f $onesrc || errstatus=$?
            else
                mv -f $onesrc $onedst || errstatus=$?
            fi
        else
            mv -f $onesrc $onedst || errstatus=$?
        fi
        if [ $errorstatus -ne 0 ]; then
            break;
        fi
    done
    
    #   die gracefully
    exit $errorstatus
;;

install )
    #
    #   put in absolute paths if you don't have them in your path; 
    #   or use env. vars.
    #
    mvprog="${MVPROG-mv}"
    cpprog="${CPPROG-cp}"
    chmodprog="${CHMODPROG-chmod}"
    chownprog="${CHOWNPROG-chown}"
    chgrpprog="${CHGRPPROG-chgrp}"
    stripprog="${STRIPPROG-strip}"
    rmprog="${RMPROG-rm}"
    
    #
    #   parse argument line
    #
    instcmd="$mvprog"
    chmodcmd=""
    chowncmd=""
    chgrpcmd=""
    stripcmd=""
    rmcmd="$rmprog -f"
    mvcmd="$mvprog"
    ext=""
    src=""
    dst=""
    while [ ".$1" != . ]; do
        case $1 in
            -c) instcmd="$cpprog"
                shift; continue
                ;;
            -m) chmodcmd="$chmodprog $2"
                shift; shift; continue
                ;;
            -o) chowncmd="$chownprog $2"
                shift; shift; continue
                ;;
            -g) chgrpcmd="$chgrpprog $2"
                shift; shift; continue
                ;;
            -s) stripcmd="$stripprog"
                shift; continue;;
            -S) stripcmd="$stripprog $2"
                shift; shift; continue ;;
            -e) ext="$2"
                shift; shift; continue
                ;;
            *)  if [ ".$src" = . ]; then
                    src=$1
                else
                    dst=$1
                fi
                shift; continue
                ;;
        esac
    done
    if [ ".$src" = . ]; then
         echo "install.sh: no input file specified"
         exit 1
    fi
    if [ ".$dst" = . ]; then
         echo "install.sh: no destination specified"
         exit 1
    fi
    
    #
    #  If destination is a directory, append the input filename; if
    #  your system does not like double slashes in filenames, you may
    #  need to add some logic
    #
    if [ -d $dst ]; then
        dst="$dst/`basename $src`"
    fi
    
    #  Add a possible extension (such as ".exe") to src and dst
    src="$src$ext"
    dst="$dst$ext"
    
    #  Make a temp file name in the proper directory.
    dstdir=`dirname $dst`
    dsttmp=$dstdir/#inst.$$#
    
    #  Move or copy the file name to the temp name
    $instcmd $src $dsttmp
    
    #  And set any options; do chmod last to preserve setuid bits
    if [ ".$chowncmd" != . ]; then $chowncmd $dsttmp; fi
    if [ ".$chgrpcmd" != . ]; then $chgrpcmd $dsttmp; fi
    if [ ".$stripcmd" != . ]; then $stripcmd $dsttmp; fi
    if [ ".$chmodcmd" != . ]; then $chmodcmd $dsttmp; fi
    
    #  Now rename the file to the real destination.
    $rmcmd $dst
    $mvcmd $dsttmp $dst
    
    exit 0
;;

mkdir )
    #   command line parsing
    mode=""
    force=0
    parent=0
    while [ ".$1" != . ]; do
        case $1 in
            -f)  force=1;          shift; continue ;; 
            -p)  parent=1;         shift; continue ;;
            -m)  mode="$2"; shift; shift; continue ;;
             *)  break ;;
        esac
    done
    if [ $# -eq 0 ]; then
        echo "$0:Usage: mkdir [-f] [-p] [-m <mode>] <dir> [<dir> ...]" 1>&2
        exit 1
    fi
    
    errstatus=0
    for p in ${1+"$@"}; do 
        #   when the directory already exists...
        if [ -d "$p" ]; then
            if [ $force = 0 ]; then
                echo "$0:Error: file exists: $p" 1>&2
                errstatus=1
                break
            else
                continue
            fi
        fi
        #   when the directory has to be created
        if [ $parent = 0 ]; then
            mkdir $p || errstatus=$?
        else
            #   the smart situation
            set fnord `echo ":$p" |\
                       sed -e 's/^:\//%/' \
                           -e 's/^://' \
                           -e 's/\// /g' \
                           -e 's/^%/\//'`
            shift
            pathcomp=
            for d in ${1+"$@"}; do
                pathcomp="$pathcomp$d"
                case "$pathcomp" in
                    -* ) pathcomp="./$pathcomp" ;;
                esac
                if [ ! -d "$pathcomp" ]; then
                    mkdir $pathcomp || errstatus=$?
                    if [ ".$mode" != . ]; then
                        chmod $mode $pathcomp || errstatus=$?
                    fi
                fi
                pathcomp="$pathcomp/"
            done
        fi
    done
    exit $errstatus
;;

mkln )
    #
    #   command line parsing
    #
    verbose=no
    force=no
    symbolic=no
    while [ ".$1" != . ]; do
        case $1 in
            -v)  verbose=yes; shift; continue ;; 
            -f)  force=yes; shift; continue ;; 
            -s)  symbolic=yes; shift; continue ;; 
             *)  break ;;
        esac
    done
    if [ $# -lt 2 ]; then
        echo "$0:Usage: mkln [-v] [-f] [-s] <from> [<from> ...] <to>" 1>&2
        exit 1
    fi
    args=$?
    srcs=""
    while [ $# -gt 1 ]; do
        srcs="$srcs $1"
        shift
    done
    dst="$1"
    if [ ! -d $dst ]; then
        if [ $args -gt 2 ]; then
            echo "$0:Error: multiple sources not allowed when destination isn't a directory" 1>&2
            exit 1
        fi
    fi
    
    #
    #   determine link options
    #
    lnopt=""
    if [ $force = yes ]; then
        lnopt="$lnopt -f"
    fi
    if [ $symbolic = yes ]; then
        lnopt="$lnopt -s"
    fi
    
    #
    #   iterate over sources
    #
    for src in $srcs; do
        #   debugging
        if [ $verbose = yes ]; then
            echo "src=\"$src\" dst=\"$dst\":"
        fi
    
        #   determine if one of the paths is an absolute path,
        #   because then we _have_ to use an absolute symlink
        oneisabs=0
        srcisabs=0
        dstisabs=0
        case $src in
            /* ) oneisabs=1; srcisabs=1 ;;
        esac
        case $dst in
            /* ) oneisabs=1; dstisabs=1 ;;
        esac
    
        #   split source and destination into dir and base name
        if [ -d $src ]; then
            srcdir=`echo $src | sed -e 's;/*$;;'`
            srcbase=""
        else
            srcdir=`echo  $src | sed -e 's;^[^/]*$;;' -e 's;^\(.*/\)[^/]*$;\1;' -e 's;\(.\)/$;\1;'`
            srcbase=`echo $src | sed -e 's;.*/\([^/]*\)$;\1;'`
        fi
        if [ -d $dst ]; then
            dstdir=`echo $dst | sed -e 's;/*$;;'`
            dstbase=""
        else
            dstdir=`echo  $dst | sed -e 's;^[^/]*$;;' -e 's;^\(.*/\)[^/]*$;\1;' -e 's;\(.\)/$;\1;'`
            dstbase=`echo $dst | sed -e 's;.*/\([^/]*\)$;\1;'`
        fi
    
        #   debugging
        if [ $verbose = yes ]; then
            echo "  STATE 1:"
            echo "  srcisabs=$srcisabs srcdir=\"$srcdir\" srcbase=\"$srcbase\""
            echo "  dstisabs=$dstisabs dstdir=\"$dstdir\" dstbase=\"$dstbase\""
            echo "  oneisabs=$oneisabs"
        fi
    
        #   consistency check
        if [ ".$dstdir" != . ]; then
            if [ ! -d $dstdir ]; then
                echo "$0:Error: destination directory not found: $dstdir" 1>&2
                exit 1
            fi
        fi
    
        #   make sure the source is reachable from the destination
        if [ $dstisabs = 1 ]; then
            if [ $srcisabs = 0 ]; then
                if [ -d $srcdir ]; then
                    srcdir="`cd $srcdir; pwd | sed -e 's;/*$;;'`"
                    srcisabs=1
                    oneisabs=1
                    #   debugging
                    if [ $verbose = yes ]; then
                        echo "  STATE 2:"
                        echo "  srcisabs=$srcisabs srcdir=\"$srcdir\" srcbase=\"$srcbase\""
                        echo "  dstisabs=$dstisabs dstdir=\"$dstdir\" dstbase=\"$dstbase\""
                        echo "  oneisabs=$oneisabs"
                    fi
                fi
            fi
        fi
    
        #   split away a common prefix
        prefix=""
        if [ ".$srcdir" = ".$dstdir" ] && [ ".$srcdir" != . ]; then
            prefix="$srcdir/"
            srcdir=""
            dstdir=""
        else
            while [ ".$srcdir" != . ] && [ ".$dstdir" != . ]; do
                presrc=`echo $srcdir | sed -e 's;^\([^/]*\)/.*;\1;'`
                predst=`echo $dstdir | sed -e 's;^\([^/]*\)/.*;\1;'`
                if [ ".$presrc" != ".$predst" ]; then
                    break
                fi
                prefix="$prefix$presrc/"
                srcdir=`echo $srcdir | sed -e 's;^[^/]*/*;;'`
                dstdir=`echo $dstdir | sed -e 's;^[^/]*/*;;'`
            done
        fi
    
        #   debugging
        if [ $verbose = yes ]; then
            echo "  STATE 3:"
            echo "  prefix=$prefix"
            echo "  srcisabs=$srcisabs srcdir=\"$srcdir\" srcbase=\"$srcbase\""
            echo "  dstisabs=$dstisabs dstdir=\"$dstdir\" dstbase=\"$dstbase\""
            echo "  oneisabs=$oneisabs"
        fi
    
        #   destination prefix is just the common prefix
        dstpre="$prefix"
    
        #   determine source prefix which is the reverse directory
        #   step-up corresponding to the destination directory
        srcpre=""
        if [ $oneisabs = 0 ] || [ ".$prefix" != . -a ".$prefix" != ./ ]; then
            pl="$dstdir/"
            OIFS="$IFS"; IFS='/'
            for pe in $pl; do
                [ ".$pe" = . ] && continue
                srcpre="../$srcpre"
            done
            IFS="$OIFS"
        else
            if [ $srcisabs = 1 ]; then
                srcpre="$prefix"
            fi
        fi
    
        #   debugging
        if [ $verbose = yes ]; then
            echo "  STATE 4:"
            echo "  prefix=$prefix"
            echo "  srcisabs=$srcisabs srcpre=\"$srcpre\" srcdir=\"$srcdir\" srcbase=\"$srcbase\""
            echo "  dstisabs=$dstisabs dstpre=\"$dstpre\" dstdir=\"$dstdir\" dstbase=\"$dstbase\""
            echo "  oneisabs=$oneisabs"
        fi
    
        #   determine destination symlink name
        if [ ".$dstbase" = . ]; then
            if [ ".$srcbase" != . ]; then
                dstbase="$srcbase"
            else
                dstbase=`echo "$prefix$srcdir" | sed -e 's;/*$;;' -e 's;.*/\([^/]*\)$;\1;'`
            fi
        fi
    
        #   now finalize source and destination directory paths
        srcdir=`echo $srcdir | sed -e 's;\([^/]\)$;\1/;'`
        dstdir=`echo $dstdir | sed -e 's;\([^/]\)$;\1/;'`
    
        #   debugging
        if [ $verbose = yes ]; then
            echo "  STATE 5:"
            echo "  prefix=$prefix"
            echo "  srcisabs=$srcisabs srcpre=\"$srcpre\" srcdir=\"$srcdir\" srcbase=\"$srcbase\""
            echo "  dstisabs=$dstisabs dstpre=\"$dstpre\" dstdir=\"$dstdir\" dstbase=\"$dstbase\""
            echo "  oneisabs=$oneisabs"
        fi
    
        #   run the final link command
        if [ $verbose = yes ]; then
            echo "  RESULT:"
            echo "ln$lnopt $srcpre$srcdir$srcbase $dstpre$dstdir$dstbase"
        fi
        eval ln$lnopt $srcpre$srcdir$srcbase $dstpre$dstdir$dstbase
    done
    exit 0
;;

mkshadow )
    #   default IFS
    DIFS=' 	
    '
    
    #   command line check
    if [ $# -ne 2 ]; then
        echo "$0:Error: Invalid aruments" 1>&2
        exit 1
    fi
    
    #   source and destination directory
    src=`echo $1 | sed -e 's:/$::'`
    dst=`echo $2 | sed -e 's:/$::'`
    
    #   check whether source exists
    if [ ! -d $src ]; then
        echo "$0:Error: source directory not found" 1>&2
        exit 1
    fi
    
    #   determine if one of the paths is an absolute path,
    #   because then we have to use an absolute symlink
    oneisabs=0
    case $src in
        /* ) oneisabs=1 ;;
    esac
    case $dst in
        /* ) oneisabs=1 ;;
    esac
    
    #   determine reverse directory for destination directory
    dstrevdir=''
    if [ $oneisabs = 0 ]; then
        #   (inlined fp2rp)
        OIFS="$IFS"; IFS='/'
        for pe in $dst; do
            dstrevdir="../$dstrevdir"
        done
        IFS="$OIFS"
    else
        src="`cd $src; pwd`";
    fi
    
    #   create directory tree at destination
    if [ ! -d $dst ]; then
        mkdir $dst
    fi
    DIRS="`cd $src
           find . -type d -print |\
           sed -e '/\/CVS/d' \
               -e '/^\.$/d' \
               -e 's:^\./::'`"
    OIFS="$IFS" IFS="$DIFS"
    for dir in $DIRS; do
        mkdir $dst/$dir
    done
    IFS="$OIFS"
    
    #   fill directory tree with symlinks to files
    FILES="`cd $src
            find . -depth -print |\
            sed -e '/\.o$/d' \
                -e '/\.a$/d' \
                -e '/\.so$/d' \
                -e '/\.so-o$/d' \
                -e '/\.cvsignore$/d' \
                -e '/\/CVS/d' \
                -e '/\.indent\.pro$/d' \
                -e '/\.apaci.*/d' \
                -e '/Makefile$/d' \
                -e '/\/\.#/d' \
                -e '/\.orig$/d' \
                -e 's/^\.\///'`"
    OIFS="$IFS" IFS="$DIFS"
    for file in $FILES; do
         #  don't use `-type f' above for find because of symlinks
         if [ -d $file ]; then
             continue
         fi
         basename=`echo $file | sed -e 's:^.*/::'`
         dir=`echo $file | sed -e 's:[^/]*$::' -e 's:/$::' -e 's:$:/:' -e 's:^/$::'`
         from="$src/$file"
         to="$dst/$dir$basename"
         if [ $oneisabs = 0 ]; then
             if [ ".$dir" != . ]; then
                 subdir=`echo $dir | sed -e 's:/$::'`
                 #   (inlined fp2rp)
                 revdir=''
                 OIFS2="$IFS"; IFS='/'
                 for pe in $subdir; do
                     revdir="../$revdir"
                 done
                 IFS="$OIFS2"
                 #   finalize from
                 from="$revdir$from"
             fi
             from="$dstrevdir$from"
         fi
         echo "    $to"
         ln -s $from $to
    done
    IFS="$OIFS"
;;

fixperm )
    for p in $*; do
        for file in `find $p -depth -print`; do
            if [ -f $file ]; then
                if [ -x $file ]; then
                    echo "    $file (FILE/EXEC)"
                    chmod 775 $file
                else
                    echo "    $file (FILE/REGULAR)"
                    chmod 664 $file
                fi
                continue
            fi
            if [ -d $file ]; then
                echo "    $file (DIR)"
                chmod 775 $file
                continue
            fi
            echo "    $file (UNKNOWN)"
        done
    done
;;

guessos )
    MACHINE=`(uname -m) 2>/dev/null` || MACHINE="unknown"
    RELEASE=`(uname -r) 2>/dev/null` || RELEASE="unknown"
     SYSTEM=`(uname -s) 2>/dev/null` ||  SYSTEM="unknown"
    VERSION=`(uname -v) 2>/dev/null` || VERSION="unknown"
    
    XREL=`(uname -X) 2>/dev/null | grep "^Release" | awk '{print $3}'`
    if [ "x$XREL" != "x" ]; then
        if [ -f /etc/kconfig ]; then
            case "$XREL" in
                4.0|4.1) echo "${MACHINE}-whatever-isc4"; exit 0 ;;
            esac
        else
        case "$XREL" in
            3.2v4.2) 
                echo "whatever-whatever-sco3"; exit 0 
                ;;
            3.2v5.0*) 
                echo "whatever-whatever-sco5"; exit 0 
                ;;
            4.2MP)
                if [ "x$VERSION" = "x2.1.1" ]; then
                    echo "${MACHINE}-whatever-unixware211"; exit 0
                elif [ "x$VERSION" = "x2.1.2" ]; then
                    echo "${MACHINE}-whatever-unixware212"; exit 0
                else
                    echo "${MACHINE}-whatever-unixware2"; exit 0
                fi
                ;;
            4.2) 
                echo "whatever-whatever-unixware1"; exit 0 
                ;;
            5)
                case "$VERSION" in
                    7*) echo "${MACHINE}-whatever-unixware7"; exit 0 ;;
                esac
                ;;
        esac
        fi
    fi
    case "${SYSTEM}:${RELEASE}:${VERSION}:${MACHINE}" in
        MiNT:*)
            echo "m68k-atari-mint"; exit 0
            ;;
        A/UX:*)
            echo "m68k-apple-aux3"; exit 0
            ;;
        AIX:*)
            echo "${MACHINE}-ibm-aix${VERSION}.${RELEASE}"; exit 0
            ;;
        dgux:*)
            echo "${MACHINE}-dg-dgux"; exit 0
            ;;
        HI-UX:*)
            echo "${MACHINE}-hi-hiux"; exit 0
            ;;
        HP-UX:*)
            HPUXVER=`echo ${RELEASE}|sed -e 's/[^.]*.[0B]*//'`
            echo "${MACHINE}-hp-hpux${HPUXVER}"; exit 0
            ;;
        IRIX:*)
            if [ -f /usr/lib32/mips4/libm.so ]; then
                echo "${MACHINE}-sgi-irix32"; exit 0
            else
                echo "${MACHINE}-sgi-irix"; exit 0
            fi
            ;;
        IRIX64:*)
            echo "${MACHINE}-sgi-irix64"; exit 0
            ;;
        Linux:[2-9].*)
            echo "${MACHINE}-whatever-linux2"; exit 0
            ;;
        Linux:1.*)
            echo "${MACHINE}-whatever-linux1"; exit 0
            ;;
        LynxOS:*)
            echo "${MACHINE}-lynx-lynxos"; exit 0
            ;;
        BSD/386:*:*:*486*|BSD/OS:*:*:*:*486*)
            echo "i486-whatever-bsdi"; exit 0
            ;;
        BSD/386:*|BSD/OS:*)
            echo "${MACHINE}-whatever-bsdi"; exit 0
            ;;
        FreeBSD:*)
            VERS=`echo ${RELEASE} | sed -e 's/[-(].*//'`
            MACH=`sysctl -n hw.model`
            ARCH='whatever'
            case ${MACH} in
               *386*       ) MACH="i386"     ;;
               *486*       ) MACH="i486"     ;;
               Pentium\ II*) MACH="i686"     ;;
               Pentium*    ) MACH="i586"     ;;
               Alpha*      ) MACH="alpha"    ;;
               *           ) MACH="$MACHINE" ;;
            esac
            case ${MACH} in
               i[0-9]86 ) ARCH="pc" ;;
            esac
            echo "${MACH}-${ARCH}-freebsd${VERS}"; exit 0
            ;;
        NetBSD:*:*:*486*)
            echo "i486-whatever-netbsd"; exit 0
            ;;
        NetBSD:*)
            echo "${MACHINE}-whatever-netbsd"; exit 0
            ;;
        OpenBSD:*)
            echo "${MACHINE}-whatever-openbsd"; exit 0
            ;;
        OSF1:*:*:*alpha*)
            echo "${MACHINE}-dec-osf"; exit 0
            ;;
        QNX:*)
            if [ "$VERSION" -gt 422 ]; then
                echo "${MACHINE}-qssl-qnx32"
            else
                echo "${MACHINE}-qssl-qnx"
            fi
            exit 0
            ;;
        Paragon*:*:*:*)
            echo "i860-intel-osf1"; exit 0
            ;;
        SunOS:5.*)
            SOLVER=`echo ${RELEASE}|awk -F. '{
            if (NF < 3)
                printf "2%s0\n",$2
            else
                printf "2%s%s\n",$2,$3
            }'`
            echo "${MACHINE}-sun-solaris2.${SOLVER}"; exit 0
            ;;
        SunOS:*)
            echo "${MACHINE}-sun-sunos4"; exit 0
            ;;
        UNIX_System_V:4.*:*)
            echo "${MACHINE}-whatever-sysv4"; exit 0
            ;;
        unix:3.0.9*:*:88k)
            echo "${MACHINE}-encore-sysv4"; exit 0
            ;;
        *:4*:R4*:m88k)
            echo "${MACHINE}-whatever-sysv4"; exit 0
            ;;
        UnixWare:5:99*:*)
            # Gemini, beta release of next rev of unixware
            echo "${MACHINE}-whatever-unixware212"; exit 0
            ;;
        DYNIX/ptx:4*:*)
            echo "${MACHINE}-whatever-sysv4"; exit 0
            ;;
        *:4.0:3.0:[345][0-9]?? | *:4.0:3.0:3[34]??[/,]* | library:*)
            echo "x86-ncr-sysv4"; exit 0
            ;;
        ULTRIX:*)
            echo "${MACHINE}-unknown-ultrix"; exit 0
            ;;
        SINIX-?:* | ReliantUNIX-?:*)
            echo "${MACHINE}-siemens-sysv4"; exit 0
            ;;
        POSIX*BS2000)
            echo "${MACHINE}-siemens-sysv4"; exit 0
            ;;
        machten:*)
           echo "${MACHINE}-tenon-${SYSTEM}"; exit 0;
           ;;
        ConvexOS:*:11.*:*)
           echo "${MACHINE}-v11-${SYSTEM}"; exit 0;
           ;;
        UNIX_SV:*:*:maxion)
           echo "${MACHINE}-ccur-sysv4"; exit 0;
           ;;
        PowerMAX_OS:*:*:Night_Hawk)
           MACHINE=`uname -p`
           echo "${MACHINE}-concurrent-powermax"; exit 0;
           ;;
        UNIX_SV:*)
           if [ -d /usr/nec ];then
               echo "mips-nec-sysv4"; exit 0;
           fi
           ;;
        NonStop-UX:4.[02]*:[BC]*:*)
           echo "${MACHINE}-tandem-sysv4"; exit 0;
           ;;
        Rhapsody:*:*:*)
           case "${MACHINE}" in
               Power*) MACHINE=powerpc ;;
           esac
           echo "${MACHINE}-apple-rhapsody${RELEASE}"; exit 0
           ;;
        "RISC iX":*)
           echo "arm-whatever-riscix"; exit 0;
           ;;
        *:4.0:2:*)
           echo "whatever-unisys-sysv4"; exit 0;
           ;;
        *:*:dcosx:NILE*)
           echo "pyramid-pyramid-svr4"; exit 0;
           ;;
        *:*:*:"DRS 6000")
           echo "drs6000-whatever-whatever"; exit 0;
           ;;
    esac
    # existance of the /usr/apollo directory is proof enough for Apollo
    if [ -d /usr/apollo ]; then
        echo "whatever-apollo-whatever"
        exit 0
    fi
    # Now NeXT
    ISNEXT=`hostinfo 2>/dev/null`
    case "$ISNEXT" in
        *NeXT*)
             # Swiped from a friendly uname clone for NEXT/OPEN Step.
             NEXTOSVER="`hostinfo | sed -n 's/.*NeXT Mach \([0-9\.]*\).*/\1/p'`"
             if [ "$NEXTOSVER" -gt 3.3 ]; then
                 NEXTOS="openstep"
             else
                 NEXTOS="nextstep"
             fi
             NEXTREL="`hostinfo | sed -n 's/.*NeXT Mach \([0-9\.]*\).*/\1/p'`" 
             NEXTARCH=`arch`
             echo "${NEXTARCH}-next-${NEXTOS}${NEXTREL}" ; exit 0
             ;;
    esac
    
    echo "${MACHINE}-whatever-${SYSTEM}|${RELEASE}|${VERSION}"
;;

arx )
    #
    #   command line parsing
    #
    verbose=no
    while [ ".$1" != . ]; do
        case $1 in
            -v)  verbose=yes; shift; continue ;; 
             *)  break ;;
        esac
    done
    if [ $# -le 4 ]; then
        echo "$0:Usage: arx [-v] <ar-prg> <ar-cmd> <archive> <file> [<file> ...]" 1>&2
        exit 1
    fi
    ar_prg=$1;  shift
    ar_cmd=$1;  shift
    archive=$1; shift
    files="$*"
    
    #
    #   walk through the file list and expand archives members
    #
    tmpdir=`echo $archive | sed -e 's;[^/]*$;.arx;'`
    nfiles=""
    for file in $files; do
        if [ ! -f $file ]; then
            echo "$0:Error: input file not found: $file" 1>&2
            exit 1
        fi
        case $file in
            *.a ) 
                if [ ! -d $tmpdir ]; then
                    if [ $verbose = yes ]; then
                        echo "mkdir $tmpdir"
                    fi
                    mkdir $tmpdir
                fi
                case $tmpdir in
                     .arx ) 
                         from="../$file"
                         ;;
                     * )
                         dir=`echo $file | sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;' -e 's;^$;.;'`
                         base=`echo $file | sed -e 's;.*/\([^/]*\)$;\1;'`
                         from="`cd $dir; pwd`/$base"
                         ;;
                esac
                if [ $verbose = yes ]; then
                    echo "(cd $tmpdir && $ar_prg x $from)"
                fi
                (cd $tmpdir && eval $ar_prg x $from)
                if [ $? -ne 0 ]; then
                    echo "$0:Error: member extraction failed for archive: $file" 1>&2
                    exit 1
                fi
                for member in - `eval $ar_prg t $file`; do
                    [ ".$member" = .- ] && continue
                    nfiles="$nfiles $tmpdir/$member"
                done
                ;;
            * )
                nfiles="$nfiles $file"
                ;;
        esac
    done
    
    #
    #   run the final archive command
    #
    if [ $verbose = yes ]; then
        echo "$ar_prg $ar_cmd $archive $nfiles"
    fi
    eval $ar_prg $ar_cmd $archive $nfiles
    if [ $? -ne 0 ]; then
        echo "$0:Error: archive command failed" 1>&2
        exit $?
    fi
    
    #
    #   cleanup and die gracefully
    #
    if [ -d $tmpdir ]; then
        if [ $verbose = yes ]; then
            echo "rm -rf $tmpdir"
        fi
        rm -rf $tmpdir
    fi
    exit 0
;;

slo )
    DIFS=' 	
    '
    
    #   
    #   parse out -L and -l options from command line
    #
    DIRS=''
    LIBS=''
    ARGV=''
    optprev=""
    OIFS="$IFS" IFS="$DIFS"
    for opt
    do
        #   concatenate with previous option if exists
        if [ ".$optprev" != . ]; then
            opt="${optprev}${opt}";
            optprev=''
        fi
        #   remember options for arg when used stand-alone
        if [ ".$opt" = ".-L" -o ".$opt" = ".-l" ]; then
            optprev="$opt"
            continue;
        fi
        #   split argument into option plus option argument
        arg="`echo $opt | cut -c3-`"
        opt="`echo $opt | cut -c1-2`"
        #   store into containers
        case $opt in
            -L) DIRS="$DIRS:$arg" ;;
            -l) LIBS="$LIBS:$arg" ;;
             *) ARGV="$ARGV $opt" ;;
        esac
    done
    IFS="$OIFS"
    
    #
    #   set linker default directories
    #
    DIRS_DEFAULT='/lib:/usr/lib'
    if [ ".$LD_LIBRARY_PATH" != . ]; then
        DIRS_DEFAULT="$DIRS_DEFAULT:$LD_LIBRARY_PATH"
    fi
    
    #
    #   sort options by class
    #
    DIRS_OBJ=''
    LIBS_OBJ=''
    DIRS_PIC=''
    LIBS_PIC=''
    DIRS_DSO=''
    LIBS_DSO=''
    
    #    for each library...
    OIFS="$IFS" IFS=':'
    for lib in $LIBS; do
        [ ".$lib" = . ] && continue
    
        found='no'
        found_indefdir='no'
        found_type=''
        found_dir=''
    
        #    for each directory...
        OIFS2="$IFS" IFS=":$DIFS"
        for dir in ${DIRS} switch-to-defdirs ${DIRS_DEFAULT}; do
            [ ".$dir" = . ] && continue
            [ ".$dir" = .switch-to-defdirs ] && found_indefdir=yes
            [ ! -d $dir ] && continue
    
            #    search the file
            OIFS3="$IFS" IFS="$DIFS"
            for file in '' `cd $dir && ls lib${lib}.* 2>/dev/null`; do
                 [ ".$file" = . ] && continue
                 case $file in
                     *.so|*.so.[0-9]*|*.sl|*.sl.[0-9]* )
                          found=yes;
                          found_type=DSO; 
                          break 
                          ;;
                     *.lo|*.la )
                          found=yes;
                          found_type=PIC 
                          ;;
                     *.a )
                          if [ ".$found_type" = . ]; then
                              found=yes
                              found_type=OBJ 
                          fi
                          ;;
                 esac
            done
            IFS="$OIFS3"
            if [ ".$found" = .yes ]; then
                found_dir="$dir"
                break
            fi
        done
        IFS="$OIFS2"
    
        if [ ".$found" = .yes ]; then
            if [ ".$found_indefdir" != .yes ]; then
                eval "dirlist=\"\${DIRS_${found_type}}:\""
                if [ ".`echo \"$dirlist\" | fgrep :$found_dir:`" = . ]; then
                    eval "DIRS_${found_type}=\"\$DIRS_${found_type}:${found_dir}\""
                fi
                eval "LIBS_${found_type}=\"\$LIBS_${found_type}:$lib\""
            else
                eval "LIBS_${found_type}=\"\$LIBS_${found_type}:$lib\""
            fi
        else
            LIBS_OBJ="$LIBS_OBJ:$lib"
            #dirlist="`echo $DIRS $DIRS_DEFAULT | sed -e 's/:/ /g'`"
            #echo "slo:Warning: library \"$lib\" not found in any of the following dirs:" 2>&1
            #echo "slo:Warning: $dirlist" 1>&1
        fi
    done
    IFS="$OIFS"
    
    #
    #   also pass-through unused dirs even if it's useless
    #
    OIFS="$IFS" IFS=':'
    for dir in $DIRS; do
        dirlist="${DIRS_OBJ}:${DIRS_PIC}:${DIRS_DSO}:"
        if [ ".`echo \"$dirlist\" | fgrep :$dir:`" = . ]; then
            DIRS_OBJ="$DIRS_OBJ:$dir"
        fi
    done
    IFS="$OIFS"
    
    #
    #   reassemble the options but seperated by type
    #
    OIFS="$IFS" IFS="$DIFS"
    for type in OBJ PIC DSO; do
        OIFS2="$IFS" IFS=':'
        eval "libs=\"\$LIBS_${type}\""
        opts=''
        for lib in $libs; do
            [ ".$lib" = . ] && continue
            opts="$opts -l$lib"
        done
        eval "LIBS_${type}=\"$opts\""
    
        eval "dirs=\"\$DIRS_${type}\""
        opts=''
        for dir in $dirs; do
            [ ".$dir" = . ] && continue
            opts="$opts -L$dir"
        done
        eval "DIRS_${type}=\"$opts\""
        IFS="$OIFS2"
    done
    IFS="$OIFS"
    
    #
    #   give back results
    #
    OIFS="$IFS" IFS="$DIFS"
    for var in ARGV DIRS_OBJ LIBS_OBJ DIRS_PIC LIBS_PIC DIRS_DSO LIBS_DSO; do
        eval "val=\"\$${var}\""
        val="`echo $val | sed -e 's/^ *//'`"
        echo "SLO_${var}=\"${val}\""
    done
    IFS="$OIFS"
;;

version )
    LANGUAGE=txt
    NAME=unknown
    PREFIX=unknown
    FULLVERSION=unknown
    REPORT=NO
    INCREASE=P
    USAGE=NO
    FILE=""
    while [ ".$1" != . ]; do
        case $1 in
            -l) LANGUAGE=$2; shift; shift; continue ;;
            -n) NAME=$2; shift; shift; continue ;;
            -p) PREFIX=$2; shift; shift; continue ;;
            -s) FULLVERSION=$2; shift; shift; continue ;;
            -i) INCREASE=$2; shift; shift; continue ;;
            -d) REPORT=$2; shift; shift; continue ;;
            -h) USAGE=YES; shift; continue ;;
             *) break;
        esac
    done
    if [ $# -ne 1 ]; then
        USAGE=YES
    else
        FILE=$1
    fi
    
    if [ ".$USAGE" = .YES ]; then
        echo "$0:Usage: version [options] file"
        echo "Options are:"
        echo "-l <lang>                 set language to one of 'txt', 'c' or 'perl'" 
        echo "-n <name>                 set program name"
        echo "-p <prefix>               set symbol prefix"
        echo "-s <v>.<r>[.pb]<p>        set version string"
        echo "-i v|r|P|p|b|a|s          increase version, revision or {alpha,batch,patch,snap} level"
        echo "-d short|long|libtool|hex display current version only"
        echo "-h                        print this page"
        exit 0
    fi
    
    #   determine language
    if [ ".$LANGUAGE" = .unknown ]; then
        case $FILE in
            *.txt )       LANGUAGE=txt  ;;
            *.c )         LANGUAGE=c    ;;
            *.pl | *.pm ) LANGUAGE=perl ;;
            * )           echo "$0:Error: Unknown language type" 1>&2; exit 1 ;;
        esac
    fi
    
    #   determine prefix from name and vice versa
    if [ ".$PREFIX" = . -o ".$PREFIX" = .unknown ]; then
        if [ ".$NAME" != . -a ".$NAME" != .unknown ]; then
            PREFIX="$NAME"
        fi
    fi
    if [ ".$NAME" = . -o ".$NAME" = .unknown ]; then
        if [ ".$PREFIX" != . -a ".$PREFIX" != .unknown ]; then
            NAME="$PREFIX"
        fi
    fi
    
    #   determine version
    date=unknown
    if [ ".$FULLVERSION" = .unknown ]; then
        if [ -r "$FILE" ]; then
            #   grep out current information
            id=`grep 'Version [0-9]*.[0-9]*[.abps][0-9]* ([0-9]*-[a-zA-Z]*-[0-9]*)' $FILE | \
                head -1 | \
                sed -e 's%.*Version \([0-9]*\)\.\([0-9]*\)\([.abps]\)\([0-9]*\) (\([0-9]*-[a-zA-Z]*-[0-9]*\)).*%\1:\2:\3:\4:\5%'`
            version=`echo $id | awk -F: '{ print $1 }'`
            revision=`echo $id | awk -F: '{ print $2 }'`
            bptype=`echo $id | awk -F: '{ print $3 }'`
            bplevel=`echo $id | awk -F: '{ print $4 }'`
            date=`echo $id | awk -F: '{ print $5 }'`
            if [ .$REPORT = .NO ]; then
                case $INCREASE in
                    b ) bplevel=`expr $bplevel + 1`
                        bptype=b
                        ;;
                    a ) bplevel=`expr $bplevel + 1`
                        bptype=a
                        ;;
                    s ) bplevel=`expr $bplevel + 1`
                        bptype=s
                        ;;
                    P ) bplevel=`expr $bplevel + 1`
                        bptype=.
                        ;;
                    p ) bplevel=`expr $bplevel + 1`
                        bptype=p
                        ;;
                    r ) revision=`expr $revision + 1`
                        bplevel=0
                        ;;
                    v ) version=`expr $version + 1`
                        revision=0
                        bplevel=0
                        ;;
                esac
                date=calc
            fi
            FULLVERSION="$version.$revision$bptype$bplevel"
        else
            #   intialise to first version
            version=0
            revision=5
            bptype=b
            bplevel=0
            date=calc
        fi
    else
        #   take given version
        V=`echo $FULLVERSION | sed -e 's%\([0-9]*\)\.\([0-9]*\)\([.abps]\)\([0-9]*\).*%\1:\2:\3:\4%'`
        version=`echo $V | awk -F: '{ print $1 }'`
        revision=`echo $V | awk -F: '{ print $2 }'`
        bptype=`echo $V | awk -F: '{ print $3 }'`
        bplevel=`echo $V | awk -F: '{ print $4 }'`
        date=calc
    fi
    
    #   determine hex value of version
    case $FULLVERSION in
        *.*a* )
            HEX=`echo "$FULLVERSION" | sed -e 's/a.*//' | awk -F. '{ printf("%d%02d", $1, $2); }' &&
                 echo "$FULLVERSION" | sed -e 's/.*a//' | awk '{ printf("0%02d", $1); }'`
            ;;
        *.*b* )
            HEX=`echo "$FULLVERSION" | sed -e 's/b.*//' | awk -F. '{ printf("%d%02d", $1, $2); }' &&
                 echo "$FULLVERSION" | sed -e 's/.*b//' | awk '{ printf("1%02d", $1); }'`
            ;;
        *.*.* )
            HEX=`echo "$FULLVERSION" | awk -F. '{ printf("%d%02d2%02d", $1, $2, $3); }'`
            ;;
    esac
    
    #   determine libtool version
    case $FULLVERSION in
        *.*a* )
            LTV=`echo "$FULLVERSION" | sed -e 's/a.*//' | awk -F. '{ printf("%d:0", $1*10+$2); }'`
            ;;
        *.*b* )
            LTV=`echo "$FULLVERSION" | sed -e 's/b.*//' | awk -F. '{ printf("%d:0", $1*10+$2); }'`
            ;;
        *.*.* )
            LTV=`echo "$FULLVERSION" | awk -F. '{ printf("%d:%d", $1*10+$2, $3); }'`
            ;;
    esac
    
    #   determine string out of filename
    FILESTR=`echo "$FILE" | tr 'abcdefghijklmnopqrstuvwxyz./%+-' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_____'`
    
    #   determine date
    if [ ".$date" = .calc ]; then
        day="`date '+%d' | awk '{ printf("%s", $1); }'`"
        month="`date '+%m' | awk '{ printf("%s", $1); }'`"
        year="`date '+%Y' 2>/dev/null | awk '{ printf("%s", $1); }'`"
        if test ".$time_year" = .; then
            year="`date '+%y' | awk '{ printf("%s", $1); }'`"
            case $year in
                9[0-9]*) year="19$year" ;;
                      *) year="20$year" ;;
            esac
        fi
        case $month in
            1|01) month='Jan' ;;
            2|02) month='Feb' ;;
            3|03) month='Mar' ;;
            4|04) month='Apr' ;;
            5|05) month='May' ;;
            6|06) month='Jun' ;;
            7|07) month='Jul' ;;
            8|08) month='Aug' ;;
            9|09) month='Sep' ;;
              10) month='Oct' ;;
              11) month='Nov' ;;
              12) month='Dec' ;;
        esac
        date="${day}-${month}-${year}"
    fi
    
    if [ .$REPORT != .NO ]; then
        case $REPORT in
            long )
                echo "$version.$revision$bptype$bplevel ($date)"
                ;;
            short )
                echo "$version.$revision$bptype$bplevel"
                ;;
            libtool )
                echo "$LTV"
                ;;
            hex )
                echo "0x$HEX"
                ;;
        esac
        exit 0
    fi
    
    #   create the version file according the the selected language  
    echo "new version: $version.$revision$bptype$bplevel ($date)"
    tmpfile="version.tmp.$$"
    rm -f $tmpfile >/dev/null 2>&1
    case $LANGUAGE in
        txt )
            cat >$tmpfile <<'EOT'
    
  This is @NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)
EOT
            ;;
        c )
            cat >$tmpfile <<'EOT'
/*
**  @FILE@ -- Version File (automatically generated and maintained by shtool)
*/

#ifdef AS_HEADER

#ifndef @FILESTR@
#define @FILESTR@
#define @PREFIX@_VERSION 0x@HEX@
extern const int  @PREFIX@_Version;
extern const char @PREFIX@_VersionStr[];
extern const char @PREFIX@_Hello[];
extern const char @PREFIX@_GNUVersion[];
extern const char @PREFIX@_WhatID[];
extern const char @PREFIX@_RCSIdentID[];
extern const char @PREFIX@_WebID[];
extern const char @PREFIX@_PlainID[];
#endif

#else

const int  @PREFIX@_Version      = 0x@HEX@;
const char @PREFIX@_VersionStr[] = "@VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)";
const char @PREFIX@_Hello[]      = "This is @NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)";
const char @PREFIX@_GNUVersion[] = "@NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@";
const char @PREFIX@_WhatID[]     = "@(#)@NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)";
const char @PREFIX@_RCSIdentID[] = "$Id$";
const char @PREFIX@_WebID[]      = "@NAME@/@VERSION@.@REVISION@@BPTYPE@@BPLEVEL@";
const char @PREFIX@_PlainID[]    = "@VERSION@.@REVISION@@BPTYPE@@BPLEVEL@";

#endif
EOT
            ;;
        perl )
            cat >$tmpfile <<'EOT'
##
##  @FILE@ -- Version File (automatically generated and maintained by shtool)
##

$@PREFIX@_Version    = 0x@HEX@;
$@PREFIX@_VersionStr = "@VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)";
$@PREFIX@_Hello      = "This is @NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)";
$@PREFIX@_GNUVersion = "@NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@";
$@PREFIX@_WhatID     = "@(#)@NAME@ Version @VERSION@.@REVISION@@BPTYPE@@BPLEVEL@ (@DAY@-@MONTH@-@YEAR@)";
$@PREFIX@_RCSIdentID = "\$Id$";
$@PREFIX@_WebID      = "@NAME@/@VERSION@.@REVISION@@BPTYPE@@BPLEVEL@";
$@PREFIX@_PlainID    = "@VERSION@.@REVISION@@BPTYPE@@BPLEVEL@";

1;
EOT
            ;;
    esac
    
    #   now create the version file
    rm -f $FILE >/dev/null 2>&1
    sed \
        -e "s|@FILE@|$FILE|g" \
        -e "s|@FILESTR@|$FILESTR|g" \
        -e "s|@PREFIX@|$PREFIX|g" \
        -e "s|@NAME@|$NAME|g" \
        -e "s|@HEX@|$HEX|g" \
        -e "s|@VERSION@|$version|g" \
        -e "s|@REVISION@|$revision|g" \
        -e "s|@BPTYPE@|$bptype|g" \
        -e "s|@BPLEVEL@|$bplevel|g" \
        -e "s|@YEAR@|$year|g" \
        -e "s|@MONTH@|$month|g" \
        -e "s|@DAY@|$day|g" <$tmpfile >$FILE
    rm -f $tmpfile >/dev/null 2>&1
    exit 0
;;

path )
    #
    #   parse argument line
    #
    silent=no
    reverse=no
    magic=no
    dirname=no
    basename=no
    pathlist="$PATH"
    namelist=""
    tmpfile="path.tmp.$$"
    while [ ".$1" != . ]; do
        case $1 in
            -s ) silent=yes   ; shift; continue ;;
            -r ) reverse=yes  ; shift; continue ;;
            -d ) dirname=yes  ; shift; continue ;;
            -b ) basename=yes ; shift; continue ;;
            -m ) magic=yes    ; shift; continue ;;
            -p ) pathlist="$2"; shift; shift; continue ;;
            *  ) break ;;
        esac
    done
    if [ $# -eq 0 ]; then
        echo "$0:Usage: path [-s] [-r] [-d] [-b] [-p <path>] <string> [<string> ...]" 1>&2
        exit 1
    fi
    namelist="$*"
    
    #
    #   check whether the test command supports the -x option
    #
    cat >$tmpfile <<EOT
if [ -x / ] || [ -x /bin ] || [ -x /bin/ls ]; then
    exit 0
fi
exit 1
EOT
    if sh $tmpfile 2>/dev/null; then
        minusx="-x"
    else
        minusx="-r"
    fi
    rm -f $tmpfile
    
    #
    #   split path string
    #
    paths="`echo $pathlist |\
            sed -e 's/^:/.:/' \
                -e 's/::/:.:/g' \
                -e 's/:$/:./' \
                -e 's/:/ /g'`"
    
    #
    #   SPECIAL REQUEST
    #   translate forward to reverse path
    #
    if [ $reverse = yes ]; then
        if [ "x$namelist" = "x." ]; then
            rp='.'
        else
            rp=''
            for pe in `IFS="$IFS/"; echo $namelist`; do
                rp="../$rp"
            done
        fi
        echo $rp | sed -e 's:/$::'
        exit 0
    fi
    
    #
    #   SPECIAL REQUEST
    #   strip out directory or base name
    #
    if [ $dirname = yes ]; then
        echo "$namelist" |\
        sed -e 's;[^/]*$;;' -e 's;\(.\)/$;\1;'
        exit 0
    fi
    if [ $basename = yes ]; then
        echo "$namelist" |\
        sed -e 's;.*/\([^/]*\)$;\1;'
        exit 0
    fi
    
    #
    #   MAGIC SITUATION
    #   Perl Interpreter (perl)
    #
    if [ ".$magic" = .yes ] && [ ".$namelist" = .perl ]; then
        rm -f $tmpfile
        touch $tmpfile
        c=0
        found=0
        for dir in $paths; do
            dir=`echo $dir | sed -e 's;/*$;;'`
            for perl in perl5 perl miniperl; do
                 if [ $minusx "$dir/$perl" ]; then
                     perl="$dir/$perl"
                     version=`$perl -v | grep version |\
                              sed -e 's/.* version //' -e 's/ built.*//' -e 's/ with.*//'`
                     versionnum="`echo $version | sed -e 's/\.//g' -e 's/_//g'`"
                     versionnum=`expr $versionnum - $c`
                     echo "$versionnum $perl" >>$tmpfile
                     found=1
                 fi
            done
            c=`expr $c + 1`
        done
        if [ $found = 1 ]; then
            perl="`cat $tmpfile | sort -u | tail -1 | cut '-d ' -f2`"
            rm -f $tmpfile
            echo "$perl"
            exit 0
        fi
        exit 1
    fi
    
    #
    #   MAGIC SITUATION
    #   C pre-processor (cpp)
    #
    if [ ".$magic" = .yes ] && [ ".$namelist" = .cpp ]; then
        cat >$tmpfile.c <<EOT
#include <assert.h>
    Syntax Error
EOT
        #   1. try the standard cc -E approach
        cpp="${CC-cc} -E"
        (eval "$cpp $tmpfile.c >/dev/null") 2>$tmpfile.out
        my_error=`grep -v '^ *+' $tmpfile.out`
        if [ ".$my_error" != . ]; then
            #   2. try the cc -E approach and GCC's -traditional-ccp option
            cpp="${CC-cc} -E -traditional-cpp"
            (eval "$cpp $tmpfile.c >/dev/null") 2>$tmpfile.out
            my_error=`grep -v '^ *+' $tmpfile.out`
            if [ ".$my_error" != . ]; then
                #   3. try a standalone cpp command in path and lib dirs
                for path in $paths /lib /usr/lib /usr/local/lib; do
                    path=`echo $path | sed -e 's;/*$;;'`
                    if [ $minusx "$path/cpp" ] && [ ! -d "$path/cpp" ]; then
                        cpp="$path/cpp"
                        break
                    fi
                done
                if [ ".$cpp" != . ]; then
                    (eval "$cpp $tmpfile.c >/dev/null") 2>$tmpfile.out
                    my_error=`grep -v '^ *+' $tmpfile.out`
                    if [ ".$my_error" != . ]; then
                        #   ok, we gave up...
                        cpp=''
                    fi
                fi
            fi
        fi
        rm -f $tmpfile.c $tmpfile.out
        if [ ".$cpp" != . ]; then
            echo "$cpp"
            exit 0
        fi
        exit 1
    fi
    
    #
    #   STANDARD SITUATION
    #   iterate over names
    #
    for name in $namelist; do
        #   iterate over paths
        for path in $paths; do
            path=`echo $path | sed -e 's;/*$;;'`
            if [ $minusx "$path/$name" ] && [ ! -d "$path/$name" ]; then
                if [ "$silent" != "yes" ]; then
                    echo "$path/$name"
                fi
                exit 0
            fi
        done
    done
    exit 1
;;

* )
    echo "$0:Error: Unknown command" 2>&1
    echo "$0:Hint:  Run 'shtool.gen -h' for usage" 2>&1
    exit 1
    ;;
esac

##EOF##