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[PATCH 21/50] Simplified get_dso_deps

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This takes advantage of several bash specific constructs to make
get_dso_deps easier to read and understand.
This commit is contained in:
Victor Lowther 2009-02-13 04:42:20 -08:00 committed by Dave Jones
parent 375a5b4084
commit 8667f2b733
1 changed files with 27 additions and 58 deletions
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85
dracut-functions
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@ -21,73 +21,42 @@
# Peter Jones <pjones@redhat.com>
# Jeremy Katz <katzj@redhat.com>
# Jakub Jelinek <jakub@redhat.com>
#
#
IF_RTLD=""
IF_dynamic=""
get_dso_deps() {
local bin="$1" ; shift
local FILES=() LDSO NAME IO FILE ADDR I1 n f TLIBDIR
declare -a FILES
declare -a NAMES
LDSO=$(LANG=C eu-readelf -l $bin 2>/dev/null | \
awk '/interpreter/ {print $4}' |sed -e 's/]$//')
[[ $LDSO && $LDSO != $bin ]] || LDSO="$IF_RTLD"
[[ $LDSO && $LDSO != $bin ]] || return 1
[[ $IF_RTLD ]] || IF_RTLD="$LDSO"
local LDSO=$(LANG=C eu-readelf -l $bin 2>/dev/null |grep interpreter |awk {'print $4;'} |sed -e 's/]$//')
[ -z "$LDSO" -o "$LDSO" == "$bin" ] && local LDSO="$IF_RTLD"
[ -z "$LDSO" -o "$LDSO" == "$bin" ] && return 1
[ -z "$IF_RTLD" ] && IF_RTLD="$LDSO"
# I hate shell.
declare -i n=0
# I love bash!
while read NAME I0 FILE ADDR I1 ; do
[ "$FILE" == "not" ] && FILE="$FILE $ADDR"
[ "$NAME" == "not" ] && NAME="$NAME $I0"
NAMES[$n]="$NAME"
FILES[$n]="$FILE"
let n++
done << EOF
$(LD_TRACE_PRELINKING=1 LD_WARN= LD_TRACE_LOADED_OBJECTS=1 \
[[ $FILE = $bin ]] && continue
[[ $FILE = not || $NAME = not ]] && {
echo "Missing a shared library required by $bin." >&2
echo "dracut cannot create an initrd." >&2
return 1
}
# see if we are loading an optimized version of a shared lib.
[[ $FILE =~ '(/lib[^/]*).*' ]] && {
TLIBDIR=${BASH_REMATCH[1]}
BASE="${FILE##*/}"
# prefer nosegneg libs, then unoptimized ones.
for f in "$TLIBDIR/i686/nosegneg" "$TLIBDIR"; do
[[ -f $f/$BASE ]] || continue
FILE="$f/$BASE"
break
done
IF_dynamic="yes"
}
FILES+=("$FILE")
done < <(LD_TRACE_PRELINKING=1 LD_WARN= LD_TRACE_LOADED_OBJECTS=1 \
$LDSO $bin 2>/dev/null)
EOF
[ ${#FILES[*]} -eq 0 ] && return 1
# we don't want the name of the binary in the list
if [ "${FILES[0]}" == "$bin" ]; then
FILES[0]=""
NAMES[0]=""
[ ${#FILES[*]} -eq 1 ] && return 1
fi
declare -i n=0
while [ $n -lt ${#FILES[*]} ]; do
local FILE="${FILES[$n]}"
local NAME="${NAMES[$n]}"
if [ "$FILE" == "not found" -o "$NAME" == "not found" ]; then
cat 1>&2 <<EOF
There are missing files on your system. The dynamic object $bin
requires ${NAMES[$n]} n order to properly function. mkinitrd cannot continue.
EOF
return 1
fi
case "$FILE" in
/lib*)
TLIBDIR=`echo "$FILE" | sed 's,\(/lib[^/]*\)/.*$,\1,'`
BASE=`basename "$FILE"`
# Prefer nosegneg libs over direct segment accesses on i686.
if [ -f "$TLIBDIR/i686/nosegneg/$BASE" ]; then
FILE="$TLIBDIR/i686/nosegneg/$BASE"
# Otherwise, prefer base libraries rather than their optimized
# variants.
elif [ -f "$TLIBDIR/$BASE" ]; then
FILE="$TLIBDIR/$BASE"
fi
FILES[$n]="$FILE"
;;
esac
IF_dynamic="yes"
let n++
done
echo "${FILES[@]}"
}