#!/bin/ksh
#h
#h setup_gnu - fetches and installs VOL & pkgadd packages on osr5/osr6
#h Version: 2.3
#h
#h usage:
#h
#h ./setup_gnu
#h ./setup_gnu help
#h ./setup_gnu -h
#h displays this help text
#h
#h ./setup_gnu list
#h lists all the packages available from the skunkware site
#h names are shown the same way they should be used on setup_gnu command-lines
#h (you can cut & paste the names to make a valid setup_gnu command-line)
#h
#h ./setup_gnu wget
#h special case that just installs the latest version of wget if there is not
#h any version installed already. setup_gnu always does this anyways before
#h doing anything else, since it uses wget internally to download the packages
#h you asked for. This is just a way to get wget installed without having to get
#h anything else.
#h
#h ./setup_gnu <url>
#h installs VOLs and/or pkgadds from an ftp or http url
#h url may point to:
#h   a VOL.000.000 or pkgadd file (even if it's not named that way)
#h   a directory of VOL.* or pkgadd files
#h   a tar of VOL.* or pkgadd files
#h   a compressed tar of VOL.* or pkgadd files (compress, gzip, bzip2)
#h
#h some examples:
#h
#h install the latest version of "ImageMagick" 
#h   ./setup_gnu `./setup_gnu list |grep "^ImageMagick-" |tail -1`
#h 
#h note, the above trick for finding the latest version would not work
#h for all packages because the "sort -n" used by the "list" option is not
#h smart enough to handle the way some packages are named. "Eterm" and "prngd"
#h are examples of packages whose version numbers would not sort correctly.
#h so generally you want to do two steps, first list the available names:
#h   ./setup_gnu list |grep prngd
#h then decide which one is the right one, and then specify it explicitly:
#h   ./setup_gnu prngd-0.9.23
#h
#h   two examples of simple, single VOL files
#h   ./setup_gnu ftp://ftp.sco.com/pub/openserver5/oss642a
#h   ./setup_gnu ftp://ftp.sco.com/pub/openserver5/oss497c
#h
#h   two examples of directories with VOL files
#h   ./setup_gnu ftp://ftp.sco.com/pub/openserver5/oss640a/VOL.*
#h   ./setup_gnu ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.39/VOL.*
#h
#h   example of a tar of VOL files
#h   ./setup_gnu ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.10/openssh-3.1p1-VOLS.tar
#h
#h   example of a compressed pkgadd file
#h   /setup_gnu ftp://ftp.caldera.com/pub/openserver5/oss630a.Z
#h
#h this makes it very painless to just browse the available suppliments at:
#h   http://www.sco.com/support/ftplists/osr5list.html
#h   http://www.sco.com/support/security/
#h   ftp://ftp2.caldera.com/pub/skunkware/osr5/vols
#h and most of them can be installed by just pasting the link from the
#h "properties" or "copy-shortcut" options from the right-click menu in a
#h web browser into an xterm or telnet session by doing:
#h ./setup_gnu <paste> [enter]
#h 
#h it also makes it possible to write scripts that can download and install
#h sco patches and gnu packages and some commercial software packages 
#h with little or no user interaction necessary.
#h
#h it also provides a way give directions for the non-adept to install
#h something like a sco patch or update without having to explain the
#h whole procedure and all the ins & outs of downloading, unpacking and
#h installing a VOL or pkgadd package the normal way.
#h
#h There is a one-line instruction using "rftp" to install setup_gnu itself
#h from Tony Lawrence's ftp site:
#h    rftp -g -bh ftp.pcunix.com /pub/bkw setup_gnu ;chmod 755 setup_gnu
#h once that's done the instructions for installing most packages is one line:
#h    /setup_gnu url_to_package
#h
#h 20061110 v2.3 - updated to handle osr6 skunkware path and VOLS.cpio files
#h
#h TODO
#h * use curl if available in place of wget/rftp
#h
#h Brian K. White - brian@aljex.com - Aljex Software

###############################################################################
#
# user-definable defaults section
#

# OSR 5.0.4 - 5.x.x
#    skunkware vols dir = skunkware/osr5/vols
#    skunkware vols extension = ...-VOLS.tar
# OSR 6.x.x
#    skunkware vols dir = skunkware/osr6/vols
#    skunkware vols extension = ...-VOLS.cpio

case `uname -v` in
	2|5.*) VDIR=osr5 ; VEXT=tar ;;
	6.*) VDIR=osr6 ; VEXT=cpio ;;
	*) printf "Unrecognized system.\nIf this is osr 5.x.x, and less than 5.0.4, then please run uname -v\nand email brian@aljex.com with the result so it can be added to this script." ; exit 1 ;;
esac

# where do we find the main skunkware ftp repository these days?
DEFAULTHOST=ftp2.sco.com
DEFAULTPATH=/skunkware/${VDIR}/vols
DEFAULTURL=ftp://${DEFAULTHOST}${DEFAULTPATH}
PASSIVE_FTP=false

# programs that might be installed in /usr/local/bin with the same name as
# ones that already exist in /bin or /usr/bin which we would like renamed
# to "g<name>" so that you can use the the gnu version of a program by saying
# for example, "gdate" instead of having to say "/usr/local/bin/date"
# NOTE: these & more already exist now, in /usr/gnu/bin & sbin by installing
# gnutools and gwxlibs
GLIST="\
	tar \
	date \
	awk \
	sed \
"

##### TO DO #####
#
# automatically add /usr/local/bin to PATH in /etc/profile
#
# automatically determine the latest version available of a given package
# instead of having to know the exact version numbers
# idea:  rftp -l ... |sort |awk <script that examines version numbers>
#

###############################################################################
#
# non user-defineable defaults and function definitions
#

CWD=`pwd`
VOLS=/tmp/vols$$
echo $PATH |grep -q "/usr/local/bin" || PATH=$PATH:/usr/local/bin
PKGTYPE=CUSTOM
export CWD VOLS PATH PKGTYPE

unset PWGET PRFTP
$PASSIVE_FTP && {
	PWGET=--passive-ftp
	PRFTP=-P
	# if asking for passive mode, make sure rftp has -P (stock doesn't)
	rftp -H 2>&1 |grep -q passive && {
		cd /usr/bin
		wget http://www.aljex.com/bkw/sco/rftpp
		[ -s rftpp ] && {
			mv rftp "rftp#"
			mv rftpp rftp
			chmod 755 rftp
		} || {
			echo "You have configured setup_gnu with PASSIVE_FTP=true,"
			echo "but your rftp does not have the passive option (-P)"
			echo "and you don't have wget installed so I can't automatically update rftp."
			echo "Somehow you must get http://www.aljex.com/bkw/sco/rftpp or"
			echo "or ftp://ftp.pcunix.com/pub/bkw/rftpp and replace /usr/bin/rftp"
			exit 1
		}
	}
}

# function to fetch and install a pakage. uses wget or rftp.
# usage:
#   install_vol <package>
# or 
#   install_vol <full url to VOLS tar file>
# or
#   install_vol <url to a VOL.000.000 file>
# or
#   install_vol <url to a directory>/VOL.*
#   to get a directory of VOLs like CSSA-2002-SCO.39
#
# Feb 2003 - added pkgadd to all of above
#
# if you give just a package name and not a full url like the first example,
# it will attempt to use: $DEFAULTURL/<package>-VOLS.tar

install_vol () {
    # set up temporary working directory
    [ "x${VOLS}" = "x" -o "x${VOLS}" = "x/" ] && exit 1
    [ -d ${VOLS} ] || mkdir ${VOLS}
    cd ${VOLS}
    rm -f ${VOLS}/* 2>&1 >/dev/null

    # download the files
    case ${1} in
	http://*|ftp://*) wget $PWGET ${1} ;;
	rftp) rftp -g -bh $PRFTP ${DEFAULTHOST} ${DEFAULTPATH} ${2}-VOLS.$VEXT ;;
	*) wget $PWGET ${DEFAULTURL}/${1}-VOLS.$VEXT ;;
    esac
    
    # rename/unzip/untar as necessary until we have VOL files 
    until ls VOL.000.000 >/dev/null 2>&1 ; do
	for FILE in * ; do
            case "`file $FILE |cut -d: -f2`" in
		*cpio*)
		    case $FILE in
			*-VOLS.cpio) cpio -iAdvI $FILE ;;
			*) mv $FILE VOL.000.000 ;;
		    esac
		    ;;
	        *gzip*) gunzip $FILE ;;
		*bzip2*) bunzip2 $FILE ;;
		*compress*) uncompress $FILE ;;
		*tar*)
		    # this handles tar-on-a-floppy like BackupEdge & some TLS's
		    tar tvf $FILE 2>/dev/null |grep -q "/_lbl/" && {
			mv $FILE VOL.000.000
			PKGTYPE=CUSTOM_TAR
		    } || {
		        tar xvAf $FILE
			rm $FILE
		    }
		    ;;
		*)
		    head -1 $FILE |grep -q "PaCkAgE DaTaStReAm" && {
			# it's really a pkgadd file, but naming it VOL*
			# is just a trick to keep this loop simple
			mv $FILE VOL.000.000
			PKGTYPE=PKGADD
		    } || {
			echo "I don't know what to do with $FILE !"
			exit 1
		    }
		    ;;
	    esac
	done
    done

    # detect floppy-tar style of custom image
    file VOL.000.000 |grep -q "tar archive" && {
	eval `tar -tvf VOL.000.000 ./tmp/_lbl 2>/dev/null |tr / "\n" |grep "^prd=" `
	PKGTYPE=CUSTOM_TAR
    }

    # install the package
    case $PKGTYPE in
        PKGADD) pkgadd -qd ${VOLS}/VOL.000.000 all ;;
        CUSTOM) custom -i -p `grep "^PROD:" VOL.000.000 |head -1 |cut -d: -f2,3` -z ${VOLS} ;;
	CUSTOM_TAR) #custom -i -p misc:$prd -z ${VOLS} 
	    echo "setup_gnu cannot automatically install this type of package yet."
	    echo "During the next few screens, select:"
	    echo "  Software"
	    echo "  Install New..."
	    echo "     From: `uname -n`"
	    echo "     Media Device: Media Images"
	    echo "     Image Directory: $VOLS"
	    echo
	    echo "Write this down, then press [Enter] to proceed...\c" ; read junk
	    custom
	    ;;
    esac

    # remove the temp directory & files
    cd ${CWD}
    rm -rf ${VOLS}
}

ListVols () {
    rftp -l $PRFTP $DEFAULTHOST $DEFAULTPATH |awk '{sub(E,"",$9);print $9}' E="-VOLS.$VEXT" |sort -n
}

ShowHelp () {
    grep "^#h" $1 |sed "s/#h//" |pg -nsfp "[Enter]-next, [Q]-quit :"
}

###############################################################################
#
# Main section
#

# if help appears anywhere in argv, do nothing but show help
# same for list
for arg in $@ ; do
    case $arg in
	""|help|-help|--help|h|-h) ShowHelp $0 ; exit ;;
	list) ListVols ; exit ;;
    esac
done

# if wget is not installed, install it first
# get it's version number in either case
whence wget >/dev/null 2>&1 && {
    WGETVER=wget-`wget -V |awk '{print $3 ; exit ;}'`
} || {
    WGETVER=`ListVols |grep "^wget-" |tail -1`
    install_vol rftp ${WGETVER}
} 

# install the package(s)... (avoid reinstalling wget)
for P in ${@:-${DEFAULTPKG}} ; do
    case ${P} in
	wget|${WGETVER}) : ;;
	*) install_vol $P ;;
    esac
done

###############################################################################
#
# post-install tweaks
#

cd /usr/local/bin

# change /usr/local/bin/tar date awk etc...  to gtar gdate gawk etc... 
for G in ${GLIST} ; do [ -f $G ] && mv -f $G g$G ; done

# skunkware mc is ok on osr6
exit
# make the skunkware version of midnight commander work better
ls -l mc |grep -q SKUNK && {
    ls -l mc |awk '{print "exec "$11" -ca \"\$@\""}' >mc.sh
    rm -f mc
    mv -f mc.sh mc
    chmod 755 mc
}