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#!/bin/bash
# License: Unspecified
. "$(librelib messages)"
set -e
shopt -s extglob
IGNORE_INTERNAL=0
if [[ $1 = "--ignore-internal" ]]; then
IGNORE_INTERNAL=1
shift
fi
script_mode=${0##*/find-lib}
case $script_mode in
deps|provides) true;;
*) die "Unknown mode %s" "$script_mode" ;;
esac
usage() {
print "Usage: find-lib(deps|provides) [options] <package file|extracted package dir>"
print "Find library dependencies or provides of a package."
echo
prose 'Prints a list of library dependencies in the format:'
echo
print ' <soname>=<soversion>-<soarch>'
echo
prose 'Where <soversion> is the shared library version, or
<soname> repeated if there is no version attached; and
<soarch> is the architecture of the library (either `32`
or `64`, based on the ELF Class).'
echo
print "Options:"
flag "--ignore-internal" "Ignore internal libraries; libraries
without a version attached"
flag "-h" "Show this message"
}
if [[ -z $1 ]]; then
usage >&2
exit 1
fi
if [[ $1 = '-h' ]]; then
usage
exit 0
fi
if [[ -d $1 ]]; then
pushd "$1" >/dev/null
else
setup_workdir
case ${script_mode} in
deps) bsdtar -C "$WORKDIR" -xf "$1";;
provides) bsdtar -C "$WORKDIR" -xf "$1" --include="*.so*";;
esac
pushd "$WORKDIR" >/dev/null
fi
process_sofile() {
# extract the library name: libfoo.so
soname="${sofile%.so?(+(.+([0-9])))}".so
# extract the major version: 1
soversion="${sofile##*\.so\.}"
if [[ "$soversion" = "$sofile" ]] && ((IGNORE_INTERNAL)); then
continue
fi
if ! in_array "${soname}=${soversion}-${soarch}" "${soobjects[@]}"; then
# libfoo.so=1-64
echo "${soname}=${soversion}-${soarch}"
soobjects+=("${soname}=${soversion}-${soarch}")
fi
}
case $script_mode in
deps) find_args=(-perm -u+x);;
provides) find_args=(-name '*.so*');;
esac
find . -type f "${find_args[@]}" | while read -r filename; do
if [[ $script_mode = "provides" ]]; then
# ignore if we don't have a shared object
if ! LC_ALL=C readelf -h "$filename" 2>/dev/null | grep -q '.*Type:.*DYN (Shared object file).*'; then
continue
fi
fi
# get architecture of the file; if soarch is empty it's not an ELF binary
soarch=$(LC_ALL=C readelf -h "$filename" 2>/dev/null | sed -n 's/.*Class.*ELF\(32\|64\)/\1/p')
[[ -n $soarch ]] || continue
if [[ $script_mode = "provides" ]]; then
# get the string binaries link to: libfoo.so.1.2 -> libfoo.so.1
sofile=$(LC_ALL=C readelf -d "$filename" 2>/dev/null | sed -n 's/.*Library soname: \[\(.*\)\].*/\1/p')
[[ -z $sofile ]] && sofile="${filename##*/}"
process_sofile
elif [[ $script_mode = "deps" ]]; then
# process all libraries needed by the binary
for sofile in $(LC_ALL=C readelf -d "$filename" 2>/dev/null | sed -nr 's/.*Shared library: \[(.*)\].*/\1/p'); do
process_sofile
done
fi
done
popd >/dev/null
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