The trick: Use grep -q and check the return code to see only those that match.

When I would use it: I need to find a symbol in a bunch of shared objects.

Example:

#/bin/sh

if [ $# -ne 2 ]
then
echo usage: $0 DIR SYMBOL
exit 1
fi

DIR=$1
SYMBOL=$2

for lib in $DIR/*.so.*
do
if [ -r $lib ]
then
objdump -t $lib | grep -q $SYMBOL
if [ $? -eq 0 ]
then echo $lib
fi
fi
done
To run it:

./find-symbol.sh /usr/lib64 sendmsg