The default Dune.Allowlist module to be used to allow or restrict functions and macros that can be safely executed.

Examples

iex> Dune.Allowlist.Default.fun_status(Kernel, :+, 2)
:allowed

iex> Dune.Allowlist.Default.fun_status(String, :to_atom, 1)
:restricted

iex> Dune.Allowlist.Default.fun_status(Atom, :to_string, 1)
{:shimmed, Dune.Shims.Atom, :to_string}

iex> Dune.Allowlist.Default.fun_status(Kernel, :foo, 1)
:undefined_function

iex> Dune.Allowlist.Default.fun_status(Bar, :foo, 1)
:undefined_module

iex> Dune.Allowlist.Default.fun_status(Kernel.SpecialForms, :quote, 2)
:restricted

Allowed modules / functions

• Access
  • Allowed: all, at, at!, elem, fetch, fetch!, filter, find, get, get_and_update, key, key!, pop, slice, values
• Atom
  • Alernative implementation: to_charlist, to_string
  • Restricted: to_char_list
• Base
  • Allowed: decode16, decode16!, decode32, decode32!, decode64, decode64!, encode16, encode32, encode64, hex_decode32, hex_decode32!, hex_encode32, hex_valid32?, url_decode64, url_decode64!, url_encode64, url_valid64?, valid16?, valid32?, valid64?
• Bitwise
  • Allowed: &&&, <<<, >>>, ^^^, __using__, band, bnot, bor, bsl, bsr, bxor, |||, ~~~
• Calendar
  • Allowed: compatible_calendars?, get_time_zone_database, strftime, truncate
  • Restricted: put_time_zone_database
• Calendar.ISO
  • Allowed: add_day_fraction_to_iso_days, date_from_iso_days, date_to_iodata, date_to_iso_days, date_to_string, datetime_to_iodata, datetime_to_string, day_of_era, day_of_week, day_of_year, day_rollover_relative_to_midnight_utc, days_in_month, from_unix, gregorian_seconds_to_iso_days, iso_days_to_beginning_of_day, iso_days_to_day_of_week, iso_days_to_end_of_day, iso_days_to_unit, leap_year?, microseconds_to_iodata, months_in_year, naive_datetime_from_iso_days, naive_datetime_to_iodata, naive_datetime_to_iso_days, naive_datetime_to_string, offset_to_iodata, offset_to_string, parse_date, parse_duration, parse_naive_datetime, parse_time, parse_utc_datetime, quarter_of_year, shift_date, shift_days, shift_naive_datetime, shift_time, shift_time_unit, time_from_day_fraction, time_to_day_fraction, time_to_iodata, time_to_string, time_unit_to_precision, valid_date?, valid_time?, year_of_era
• Date
  • Allowed: __duration__!, __struct__, add, after?, before?, beginning_of_month, beginning_of_week, compare, convert, convert!, day_of_era, day_of_week, day_of_year, days_in_month, diff, end_of_month, end_of_week, from_erl, from_erl!, from_gregorian_days, from_iso8601, from_iso8601!, leap_year?, months_in_year, new, new!, quarter_of_year, range, shift, to_erl, to_gregorian_days, to_iso8601, to_iso_days, to_string, utc_today, year_of_era
• DateTime
  • Allowed: __duration__!, __struct__, add, after?, before?, compare, convert, convert!, diff, from_gregorian_seconds, from_iso8601, from_naive, from_naive!, from_unix, from_unix!, new, new!, now, now!, shift, shift_zone, shift_zone!, to_date, to_gregorian_seconds, to_iso8601, to_naive, to_string, to_time, to_unix, truncate, utc_now
• Duration
  • Allowed: __struct__, add, from_iso8601, from_iso8601!, multiply, negate, new!, subtract, to_iso8601, to_string
• Enum
  • Allowed: all?, any?, at, chunk, chunk_by, chunk_every, chunk_while, concat, count, count_until, dedup, dedup_by, drop, drop_every, drop_while, each, empty?, fetch, fetch!, filter, filter_map, find, find_index, find_value, flat_map, flat_map_reduce, frequencies, frequencies_by, group_by, intersperse, into, map, map_every, map_intersperse, map_reduce, max, max_by, member?, min, min_by, min_max, min_max_by, partition, product, product_by, random, reduce, reduce_while, reject, reverse, reverse_slice, scan, shuffle, slice, slide, sort, sort_by, split, split_while, split_with, sum, sum_by, take, take_every, take_random, take_while, to_list, uniq, uniq_by, unzip, with_index, zip, zip_reduce, zip_with
  • Alernative implementation: join, map_join
• Float
  • Allowed: ceil, floor, max_finite, min_finite, parse, pow, ratio, round, to_char_list, to_charlist, to_string
• Function
  • Allowed: identity
  • Restricted: capture, info
• IO
  • Allowed: iodata_length, iodata_to_binary
  • Alernative implementation: chardata_to_string, inspect, puts
  • Restricted: binread, binstream, binwrite, each_binstream, each_stream, getn, gets, read, stream, warn, warn_once, write
• Integer
  • Allowed: digits, extended_gcd, floor_div, gcd, is_even, is_odd, mod, parse, pow, to_char_list, to_charlist, to_string, undigits
• JSON
  • Allowed: decode, decode!
  • Alernative implementation: encode!, encode_to_iodata!, protocol_encode
• Kernel
  • Allowed: !, !=, !==, &&, *, **, +, ++, -, --, .., ..//, /, <, <=, <>, ==, ===, =~, >, >=, abs, and, binary_part, bit_size, byte_size, ceil, div, elem, floor, get_and_update_in, get_in, hd, if, in, is_atom, is_binary, is_bitstring, is_boolean, is_exception, is_float, is_function, is_integer, is_list, is_map, is_map_key, is_nil, is_non_struct_map, is_number, is_reference, is_struct, is_tuple, length, make_ref, map_size, match?, max, min, not, or, pop_in, put_elem, put_in, raise, rem, round, self, sigil_C, sigil_D, sigil_N, sigil_R, sigil_S, sigil_T, sigil_U, sigil_c, sigil_r, sigil_s, tap, then, tl, to_timeout, trunc, tuple_size, unless, update_in, |>, ||
  • Alernative implementation: apply, dbg, inspect, sigil_W, sigil_w, throw, to_charlist, to_string
  • Restricted: @, alias!, binary_slice, binding, def, defdelegate, defexception, defguard, defguardp, defimpl, defmacro, defmacrop, defmodule, defoverridable, defp, defprotocol, defstruct, destructure, exit, function_exported?, is_pid, is_port, macro_exported?, node, reraise, send, spawn, spawn_link, spawn_monitor, struct, struct!, to_char_list, use, var!
• Kernel.SpecialForms
  • Allowed: %{}, ::, <<>>, =, ^, __aliases__, case, cond, fn, for, with, {}
  • Restricted: %, &, ., __CALLER__, __DIR__, __ENV__, __MODULE__, __STACKTRACE__, __block__, __cursor__, alias, import, quote, receive, require, super, try, unquote, unquote_splicing
• Keyword
  • Allowed: delete, delete_first, drop, equal?, fetch, fetch!, filter, from_keys, get, get_and_update, get_and_update!, get_lazy, get_values, has_key?, intersect, keys, keyword?, map, merge, new, pop, pop!, pop_first, pop_lazy, pop_values, put, put_new, put_new_lazy, reject, replace, replace!, replace_lazy, size, split, split_with, take, to_list, update, update!, validate, validate!, values
• List
  • Allowed: ascii_printable?, delete, delete_at, duplicate, ends_with?, first, flatten, foldl, foldr, improper?, insert_at, keydelete, keyfind, keyfind!, keymember?, keyreplace, keysort, keystore, keytake, last, myers_difference, pop_at, replace_at, starts_with?, to_charlist, to_float, to_integer, to_tuple, update_at, wrap, zip
  • Alernative implementation: to_string
  • Restricted: to_atom, to_existing_atom
• Map
  • Allowed: delete, drop, equal?, fetch, fetch!, filter, from_keys, from_struct, get, get_and_update, get_and_update!, get_lazy, has_key?, intersect, keys, map, merge, new, pop, pop!, pop_lazy, put, put_new, put_new_lazy, reject, replace, replace!, replace_lazy, size, split, split_with, take, to_list, update, update!, values
• MapSet
  • Allowed: __struct__, delete, difference, disjoint?, equal?, filter, intersection, member?, new, put, reject, size, split_with, subset?, symmetric_difference, to_list, union
• NaiveDateTime
  • Allowed: __duration__!, __struct__, add, after?, before?, beginning_of_day, compare, convert, convert!, diff, end_of_day, from_erl, from_erl!, from_gregorian_seconds, from_iso8601, from_iso8601!, local_now, new, new!, shift, to_date, to_erl, to_gregorian_seconds, to_iso8601, to_string, to_time, truncate, utc_now
• Process
  • Allowed: sleep
  • Restricted: alias, alive?, cancel_timer, delete, demonitor, exit, flag, get, get_keys, group_leader, hibernate, info, link, list, monitor, put, read_timer, register, registered, send, send_after, set_label, spawn, unalias, unlink, unregister, whereis
• Range
  • Allowed: __struct__, disjoint?, new, range?, shift, size, split, to_list
• Regex
  • Allowed: __escape__, __import_pattern__, __struct__, compile, compile!, escape, match?, named_captures, names, opts, re_pattern, recompile, recompile!, regex?, replace, run, scan, source, split, to_embed, version
• Stream
  • Allowed: __struct__, chunk, chunk_by, chunk_every, chunk_while, concat, cycle, dedup, dedup_by, drop, drop_every, drop_while, duplicate, each, filter, filter_map, flat_map, from_index, intersperse, interval, into, iterate, map, map_every, reject, repeatedly, resource, run, scan, take, take_every, take_while, timer, transform, unfold, uniq, uniq_by, with_index, zip, zip_with
• String
  • Allowed: at, bag_distance, byte_slice, capitalize, chunk, codepoints, contains?, count, downcase, duplicate, ends_with?, equivalent?, first, graphemes, jaro_distance, last, length, ljust, lstrip, match?, myers_difference, next_codepoint, next_grapheme, next_grapheme_size, normalize, pad_leading, pad_trailing, printable?, replace, replace_invalid, replace_leading, replace_prefix, replace_suffix, replace_trailing, reverse, rjust, rstrip, slice, split, split_at, splitter, starts_with?, strip, to_char_list, to_charlist, to_float, to_integer, trim, trim_leading, trim_trailing, upcase, valid?, valid_character?
  • Restricted: to_atom, to_existing_atom
• Time
  • Allowed: __duration__!, __struct__, add, after?, before?, compare, convert, convert!, diff, from_erl, from_erl!, from_iso8601, from_iso8601!, from_seconds_after_midnight, new, new!, shift, to_erl, to_iso8601, to_seconds_after_midnight, to_string, truncate, utc_now
• Tuple
  • Allowed: append, delete_at, duplicate, insert_at, product, sum, to_list
• URI
  • Allowed: __struct__, append_path, append_query, char_reserved?, char_unescaped?, char_unreserved?, decode, decode_query, decode_www_form, default_port, encode, encode_query, encode_www_form, merge, new, new!, parse, query_decoder, to_string
• Version
  • Allowed: __struct__, compare, compile_requirement, match?, parse, parse!, parse_requirement, parse_requirement!, to_string
• :array
  • Allowed: default, fix, foldl, foldr, from_list, from_orddict, get, is_array, is_fix, map, new, relax, reset, resize, set, size, sparse_foldl, sparse_foldr, sparse_map, sparse_size, sparse_to_list, sparse_to_orddict, to_list, to_orddict
• :binary
  • Allowed: at, bin_to_list, compile_pattern, copy, decode_hex, decode_unsigned, encode_hex, encode_unsigned, first, join, last, list_to_bin, longest_common_prefix, longest_common_suffix, match, matches, part, referenced_byte_size, replace, split
• :erlang
  • Allowed: *, +, ++, -, --, /, /=, <, =/=, =:=, =<, ==, >, >=, abs, adler32, adler32_combine, and, append_element, band, binary_part, binary_to_float, binary_to_integer, binary_to_list, bit_size, bitstring_to_list, bnot, bor, bsl, bsr, bxor, byte_size, ceil, convert_time_unit, crc32, crc32_combine, date, delete_element, div, element, float, float_to_binary, float_to_list, floor, hd, insert_element, integer_to_binary, integer_to_list, iolist_size, iolist_to_binary, iolist_to_iovec, is_atom, is_binary, is_bitstring, is_boolean, is_float, is_function, is_integer, is_list, is_map, is_map_key, is_number, is_pid, is_port, is_record, is_reference, is_tuple, length, list_to_binary, list_to_bitstring, list_to_float, list_to_integer, localtime, localtime_to_universaltime, make_ref, make_tuple, map_get, map_size, max, md5, md5_final, md5_init, md5_update, min, monotonic_time, not, or, phash2, ref_to_list, rem, round, setelement, size, split_binary, system_time, time, time_offset, timestamp, tl, trunc, tuple_size, tuple_to_list, unique_integer, universaltime, universaltime_to_localtime, xor
  • Alernative implementation: apply
  • Restricted: !, alias, alloc_info, alloc_sizes, append, atom_to_binary, atom_to_list, binary_to_atom, binary_to_existing_atom, binary_to_term, bump_reductions, call_on_load_function, cancel_timer, check_old_code, check_process_code, decode_packet, delay_trap, delete_module, demonitor, disconnect_node, display, display_string, dist_ctrl_get_data, dist_ctrl_get_data_notification, dist_ctrl_get_opt, dist_ctrl_input_handler, dist_ctrl_put_data, dist_ctrl_set_opt, dist_get_stat, dmonitor_node, dt_append_vm_tag_data, dt_get_tag, dt_get_tag_data, dt_prepend_vm_tag_data, dt_put_tag, dt_restore_tag, dt_spread_tag, erase, error, exit, exit_signal, external_size, finish_after_on_load, finish_loading, format_cpu_topology, fun_info, fun_info_mfa, fun_to_list, function_exported, garbage_collect, garbage_collect_message_area, gather_gc_info_result, get, get_cookie, get_keys, get_module_info, group_leader, halt, has_prepared_code_on_load, hibernate, is_alive, is_builtin, is_process_alive, link, list_to_atom, list_to_existing_atom, list_to_pid, list_to_port, list_to_ref, list_to_tuple, load_module, load_nif, loaded, make_fun, match_spec_test, memory, module_loaded, monitor, monitor_node, nif_error, node, nodes, now, open_port, phash, pid_to_list, port_call, port_close, port_command, port_connect, port_control, port_get_data, port_info, port_set_data, port_to_list, ports, posixtime_to_universaltime, pre_loaded, prepare_loading, process_display, process_flag, process_info, processes, processes_iterator, processes_next, purge_module, put, raise, read_timer, register, registered, resume_process, self, send, send_after, send_nosuspend, seq_trace, seq_trace_info, seq_trace_print, set_cookie, set_cpu_topology, setnode, spawn, spawn_link, spawn_monitor, spawn_opt, spawn_request, spawn_request_abandon, start_timer, statistics, subtract, suspend_process, system_flag, system_info, system_monitor, system_profile, term_to_binary, term_to_iovec, throw, trace, trace_delivered, trace_info, trace_pattern, unalias, universaltime_to_posixtime, unlink, unregister, whereis, yield
• :erts_debug
  • Allowed: same, size, size_shared
  • Restricted: alloc_blocks_size, breakpoint, copy_shared, df, dirty, dirty_cpu, dirty_io, dis_to_file, disassemble, dist_ext_to_term, flat_size, get_internal_state, ic, instructions, interpreter_size, lc_graph, lc_graph_merge, lc_graph_to_dot, lcnt_clear, lcnt_collect, lcnt_control, map_info, set_internal_state, unaligned_bitstring
• :gb_sets
  • Allowed: add, add_element, balance, del_element, delete, delete_any, difference, empty, filter, filtermap, fold, from_list, from_ordset, insert, intersection, is_disjoint, is_element, is_empty, is_equal, is_member, is_set, is_subset, iterator, iterator_from, larger, largest, map, new, next, singleton, size, smaller, smallest, subtract, take_largest, take_smallest, to_list, union
• :gb_trees
  • Allowed: balance, delete, delete_any, empty, enter, from_orddict, get, insert, is_defined, is_empty, iterator, iterator_from, keys, larger, largest, lookup, map, next, size, smaller, smallest, take, take_any, take_largest, take_smallest, to_list, update, values
• :lists
  • Allowed: all, any, append, concat, delete, droplast, dropwhile, duplicate, enumerate, filter, filtermap, flatlength, flatmap, flatten, foldl, foldr, foreach, join, keydelete, keyfind, keymap, keymember, keymerge, keyreplace, keysearch, keysort, keystore, keytake, last, map, mapfoldl, mapfoldr, max, member, merge, merge3, min, nth, nthtail, partition, prefix, reverse, rkeymerge, rmerge, rmerge3, rukeymerge, rumerge, rumerge3, search, seq, sort, split, splitwith, sublist, subtract, suffix, sum, takewhile, ukeymerge, ukeysort, umerge, umerge3, uniq, unzip, unzip3, usort, zf, zip, zip3, zipwith, zipwith3
• :maps
  • Allowed: filter, filtermap, find, fold, foreach, from_keys, from_list, get, groups_from_list, intersect, intersect_with, is_iterator_valid, is_key, iterator, keys, map, merge, merge_with, new, next, put, remove, size, take, to_list, update, update_with, values, with, without
• :math
  • Allowed: acos, acosh, asin, asinh, atan, atan2, atanh, ceil, cos, cosh, erf, erfc, exp, floor, fmod, log, log10, log2, pi, pow, sin, sinh, sqrt, tan, tanh, tau
• :orddict
  • Allowed: append, append_list, erase, fetch, fetch_keys, filter, find, fold, from_list, is_empty, is_key, map, merge, new, size, store, take, to_list, update, update_counter
• :ordsets
  • Allowed: add_element, del_element, filter, filtermap, fold, from_list, intersection, is_disjoint, is_element, is_empty, is_equal, is_set, is_subset, map, new, size, subtract, to_list, union
• :proplists
  • Allowed: append_values, compact, delete, expand, from_map, get_all_values, get_bool, get_keys, get_value, is_defined, lookup, lookup_all, normalize, property, split, substitute_aliases, substitute_negations, to_map, unfold
• :queue
  • Allowed: all, any, cons, daeh, delete, delete_r, delete_with, delete_with_r, drop, drop_r, filter, filtermap, fold, from_list, get, get_r, head, in, in_r, init, is_empty, is_queue, join, lait, last, len, liat, member, new, out, out_r, peek, peek_r, reverse, snoc, split, tail, to_list
• :rand
  • Allowed: bc64, bytes, bytes_s, export_seed, export_seed_s, exro928_jump_2pow20, exro928_jump_2pow512, exro928_next, exro928_next_state, exro928_seed, exsp_jump, exsp_next, float2str, format_jumpconst58, jump, make_float, mwc59, mwc59_float, mwc59_seed, mwc59_value, mwc59_value32, normal, normal_s, seed, seed58, seed_s, splitmix64_next, uniform, uniform_real, uniform_real_s, uniform_s
• :string
  • Allowed: casefold, centre, chars, chomp, chr, concat, copies, cspan, equal, find, is_empty, jaro_similarity, join, left, len, length, lexemes, list_to_float, list_to_integer, lowercase, next_codepoint, next_grapheme, nth_lexeme, pad, prefix, rchr, replace, reverse, right, rstr, slice, span, split, str, strip, sub_string, sub_word, substr, take, titlecase, to_float, to_graphemes, to_integer, to_lower, to_upper, tokens, trim, uppercase, words
• :zlib
  • Allowed: compress, gunzip, gzip, uncompress, unzip, zip
  • Restricted: close, deflate, deflateEnd, deflateInit, deflateParams, deflateReset, deflateSetDictionary, inflate, inflateEnd, inflateGetDictionary, inflateInit, inflateReset, inflateSetDictionary, on_load, open, safeInflate, set_controlling_process