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      1 #!/bin/sh
      2 #
      3 #	$NetBSD: rump_wmd.sh,v 1.4 2014/01/28 13:58:25 pooka Exp $
      4 #
      5 # Copyright (c) 2014 Antti Kantee <pooka (at] iki.fi>
      6 #
      7 # Redistribution and use in source and binary forms, with or without
      8 # modification, are permitted provided that the following conditions
      9 # are met:
     10 # 1. Redistributions of source code must retain the above copyright
     11 #    notice, this list of conditions and the following disclaimer.
     12 # 2. Redistributions in binary form must reproduce the above copyright
     13 #    notice, this list of conditions and the following disclaimer in the
     14 #    documentation and/or other materials provided with the distribution.
     15 #
     16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     17 # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     18 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     19 # DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     22 # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26 # SUCH DAMAGE.
     27 #
     28 
     29 : ${CC:=cc}
     30 DEBUGLEVEL=0
     31 LIBDIR=/usr/lib
     32 
     33 die ()
     34 {
     35 
     36 	echo $* >&2
     37 	exit 1
     38 }
     39 
     40 usage ()
     41 {
     42 
     43 	die "Usage: $0 [-hv] [-L libdir] -lrump_component [...]"
     44 }
     45 
     46 unset FIRSTLIB
     47 while getopts 'hl:L:v' opt; do
     48 	case "${opt}" in
     49 	l)
     50 		: ${FIRSTLIB:=${OPTIND}}
     51 		;;
     52 	L)
     53 		[ -z "${FIRSTLIB}" ] || usage
     54 		LIBDIR=${OPTARG}
     55 		;;
     56 	v)
     57 		[ -z "${FIRSTLIB}" ] || usage
     58 		DEBUGLEVEL=$((DEBUGLEVEL + 1))
     59 		;;
     60 	-h|*)
     61 		usage
     62 		;;
     63 	esac
     64 done
     65 [ -z "${FIRSTLIB}" ] && usage
     66 shift $((${FIRSTLIB} - 2))
     67 [ $# -eq 0 ] && usage
     68 
     69 debug ()
     70 {
     71 
     72 	[ ${DEBUGLEVEL} -ge ${1} ] && \
     73 	    { lvl=$1; shift; echo DEBUG${lvl}: $* >&2; }
     74 }
     75 
     76 # filters from list
     77 filter ()
     78 {
     79 
     80 	filtee=$1
     81 	vname=$2
     82 	tmplist=''
     83 	found=false
     84 	for x in $(eval echo \${${vname}}); do
     85 		if [ "${filtee}" = "${x}" ]; then
     86 			found=true
     87 		else
     88 			tmplist="${tmplist} ${x}"
     89 		fi
     90 	done
     91 	${found} || die \"${1}\" not found in \$${2}
     92 
     93 	eval ${vname}="\${tmplist}"
     94 }
     95 
     96 SEEDPROG='int rump_init(void); int main() { rump_init(); }'
     97 CCPARAMS='-Wl,--no-as-needed -o /dev/null -x c -'
     98 
     99 # sanity-check
    100 for lib in $* ; do
    101 	[ "${lib#-l}" = "${lib}" -o -z "${lib#-l}" ] \
    102 	    && die Param \"${lib}\" is not of format -llib
    103 done
    104 
    105 # starting set and available components
    106 WANTEDCOMP="$*"
    107 RUMPBASE='-lrump -lrumpuser'
    108 CURCOMP="${WANTEDCOMP}"
    109 NEEDEDCOMP=''
    110 ALLCOMP=$(ls ${LIBDIR} 2>/dev/null \
    111     | sed -n '/^librump.*.so$/{s/lib/-l/;s/\.so//p;}')
    112 [ -z "${ALLCOMP}" ] && die No rump kernel components in \"${LIBDIR}\"
    113 
    114 # filter out ones we'll definitely not use
    115 for f in ${CURCOMP} -lrumphijack -lrumpclient; do
    116 	filter ${f} ALLCOMP
    117 done
    118 
    119 # put the factions first so that they'll be tried first.
    120 # this is an optimization to minimize link attempts.
    121 FACTIONS='-lrumpvfs -lrumpnet -lrumpdev'
    122 for f in ${FACTIONS}; do
    123 	filter ${f} ALLCOMP
    124 done
    125 ALLCOMP="${FACTIONS} ${ALLCOMP}"
    126 
    127 debug 0 Searching component combinations.  This may take a while ...
    128 while :; do
    129 	debug 1 Current components: ${CURCOMP}
    130 
    131 	IFS=' '
    132 	out=$(echo ${SEEDPROG} \
    133 	    | ${CC} -L${LIBDIR} ${CCPARAMS} ${CURCOMP} ${RUMPBASE} 2>&1)
    134 	[ -z "${out}" ] && break
    135 	undef=$(echo ${out} \
    136 	    | sed -n '/undefined reference to/{s/.*`//;s/.$//p;q;}')
    137 	[ -z "${undef}" ] && break
    138 
    139 	debug 1 Trying to find ${undef}
    140 	for attempt in ${ALLCOMP}; do
    141 		debug 2 Component attempt: ${attempt}
    142 		unset IFS
    143 		nowundef=$(echo ${SEEDPROG}				\
    144 		    | ${CC} -L${LIBDIR} ${CCPARAMS}			\
    145 		      ${attempt} ${CURCOMP} ${RUMPBASE} 2>&1		\
    146 		    | sed -n '/undefined reference to/{s/.*`//;s/.$//p;}')
    147 		for one in ${nowundef}; do
    148 			[ "${one}" = "${undef}" ] && continue 2
    149 		done
    150 		CURCOMP="${attempt} ${CURCOMP}"
    151 		filter ${attempt} ALLCOMP
    152 		debug 1 Found ${undef} from ${attempt}
    153 		continue 2
    154 	done
    155 	die Internal error: unreachable statement
    156 done
    157 
    158 [ ! -z "${out}" ] && { echo 'ERROR:' >&2 ; echo ${out} >&2 ; exit 1 ; }
    159 debug 0 Found a set
    160 echo ${CURCOMP}
    161 exit 0
    162