Mini Shell

#!/usr/bin/bash
# module-setup for url-lib

# called by dracut
check() {
    require_binaries curl || return 1
    return 255
}

# called by dracut
depends() {
    echo network
    return 0
}

# called by dracut
install() {
    local _dir _crt _crts _found _lib _nssckbi _p11roots _p11root
    inst_simple "$moddir/url-lib.sh" "/lib/url-lib.sh"
    inst_multiple -o ctorrent
    inst_multiple curl sed
    if curl --version | grep -qi '\bNSS\b'; then
        # also install libs for curl https
        inst_libdir_file "libnsspem.so*"
        inst_libdir_file "libnsssysinit.so*"
        inst_libdir_file "libsoftokn3.so*"
        inst_libdir_file "libsqlite3.so*"
    fi

    for _dir in $libdirs; do
        [[ -d $dracutsysrootdir$_dir ]] || continue
        for _lib in "$dracutsysrootdir$_dir"/libcurl.so.* "$dracutsysrootdir$_dir"/libcrypto.so.*; do
            [[ -e $_lib ]] || continue
            if ! [[ $_nssckbi ]]; then
                read -r -d '' _nssckbi < <(grep -F --binary-files=text -z libnssckbi "$_lib")
            fi
            read -r -d '' _crt < <(grep -E --binary-files=text -z "\.(pem|crt)" "$_lib" | sed 's/\x0//g')
            [[ $_crt ]] || continue
            [[ $_crt == /*/* ]] || continue
            if [[ -e $_crt ]]; then
                _crts="$_crts $_crt"
                _found=1
            fi
        done
    done
    if [[ $_found ]] && [[ -n $_crts ]]; then
        for _crt in $_crts; do
            if ! inst "${_crt#$dracutsysrootdir}"; then
                dwarn "Couldn't install '$_crt' SSL CA cert bundle; HTTPS might not work."
                continue
            fi
        done
    fi
    # If we found no cert bundle files referenced in libcurl but we
    # *did* find a mention of libnssckbi (checked above), install it.
    # If its truly NSS libnssckbi, it includes its own trust bundle,
    # but if it's really p11-kit-trust.so, we need to find the dirs
    # where it will look for a trust bundle and install them too.
    if ! [[ $_found ]] && [[ $_nssckbi ]]; then
        _found=1
        inst_libdir_file "libnssckbi.so*" || _found=
        for _dir in $libdirs; do
            [[ -e $dracutsysrootdir$_dir/libnssckbi.so ]] || continue
            # this looks for directory-ish strings in the file
            grep -z -o --binary-files=text '/[[:alpha:]][[:print:]]*' "${dracutsysrootdir}${_dir}"/libnssckbi.so \
                | while read -r -d '' _p11roots || [[ $_p11roots ]]; do
                    IFS=":" read -r -a _p11roots <<< "$_p11roots"
                    # the string can be a :-separated list of dirs
                    for _p11root in "${_p11roots[@]}"; do
                        # check if it's actually a directory (there are
                        # several false positives in the results)
                        [[ -d "$dracutsysrootdir$_p11root" ]] || continue
                        # check if it has some specific subdirs that all
                        # p11-kit trust dirs have
                        [[ -d "$dracutsysrootdir${_p11root}/anchors" ]] || continue
                        [[ -d "$dracutsysrootdir${_p11root}/blacklist" ]] || continue
                        # so now we know it's really a p11-kit trust dir;
                        # install everything in it
                        mkdir -p -- "${initdir}/${_p11root}"
                        if ! $DRACUT_CP -L -t "${initdir}/${_p11root}" "${dracutsysrootdir}${_p11root}"/*; then
                            dwarn "Couldn't install from p11-kit trust dir '${_p11root#$dracutsysrootdir}'; HTTPS might not work."
                        fi
                    done
                done
        done
    fi
    [[ $_found ]] || dwarn "Couldn't find SSL CA cert bundle or libnssckbi.so; HTTPS won't work."
}