2 Removed Functionality

2.1 Introduction

This document lists all removed functionality in Erlang/OTP. For more information regarding the strategy regarding removals see the documentation of Support, Compatibility, Deprecations, and Removal.

2.2 otp 24

erl_interface registry

The registry functionality part of erl_interface was as of OTP 23 deprecated and was removed in OTP 24.

Compilation of Latin-1 Encoded Erlang Files

The Erlang compiler now refuses to compile source files encoded in Latin-1 without a %% coding: latin-1 comment at the beginning of the file.

igor and erl_tidy modules in syntax_tools

The igor and erl_tidy modules have been removed from OTP and is now maintained by their original author Richard Carlsson. They can be found at github.com/richcarl/igor and github.com/richcarl/erl_tidy, respectively.

Distributed Disk Logs

The distributed disk_log feature was as of OTP 23 deprecated and was removed in OTP 24.

Old Crypto API

The Old API was removed in OTP 24. The support was formally deprecated as of OTP 23.

For replacement functions see the New API.

Megaco version 3 encoding config

The pre-release version 3 encoding configs; prev3a, prev3b and prev3c was removed in OTP 24. Use the full version instead.

The (encoding) config option for the full version, {version3, 3}, will still be supported, even though its no longer necessary to specify it this way.

Functions Removed in OTP 24

crypto:block_decrypt/3 (use crypto:crypto_one_time/4 or crypto:crypto_init/3 + crypto:crypto_update/2 + crypto:crypto_final/1 instead)
crypto:block_decrypt/4 (use crypto:crypto_one_time/5, crypto:crypto_one_time_aead/6,7 or crypto:crypto_(dyn_iv)?_init + crypto:crypto_(dyn_iv)?_update + crypto:crypto_final instead)
crypto:block_encrypt/3 (use crypto:crypto_one_time/4 or crypto:crypto_init/3 + crypto:crypto_update/2 + crypto:crypto_final/1 instead)
crypto:block_encrypt/4 (use crypto:crypto_one_time/5, crypto:crypto_one_time_aead/6,7 or crypto:crypto_(dyn_iv)?_init + crypto:crypto_(dyn_iv)?_update + crypto:crypto_final instead)
crypto:cmac/3 (use crypto:mac/4 instead)
crypto:cmac/4 (use crypto:macN/5 instead)
crypto:hmac/3 (use crypto:mac/4 instead)
crypto:hmac/4 (use crypto:macN/5 instead)
crypto:hmac_final/1 (use crypto:mac_final/1 instead)
crypto:hmac_final_n/2 (use crypto:mac_finalN/2 instead)
crypto:hmac_init/2 (use crypto:mac_init/3 instead)
crypto:hmac_update/2 (use crypto:mac_update/2 instead)
crypto:next_iv/_ (see the 'New and Old API' chapter of the CRYPTO User's guide)
crypto:poly1305/2 (use crypto:mac/3 instead)
crypto:stream_decrypt/2 (use crypto:crypto_update/2 instead)
crypto:stream_encrypt/2 (use crypto:crypto_update/2 instead)
crypto:stream_init/_ (use crypto:crypto_init/3 + crypto:crypto_update/2 + crypto:crypto_final/1 or crypto:crypto_one_time/4 instead)
filename:find_src/_ (use filelib:find_source/1,3 instead)
pg2:_/_ (this module was removed in OTP 24. Use 'pg' instead)
ssl:cipher_suites/0 (use cipher_suites/2,3 instead)
ssl:cipher_suites/1 (use cipher_suites/2,3 instead)
ssl:ssl_accept/_ (use ssl_handshake/1,2,3 instead)

2.3 otp 23

VxWorks Support

Some parts of OTP has had limited VxWorks support, such as erl_interface. This support was removed in OTP 23. This limited support was formally deprecated as of OTP 22.

Legacy parts of erl_interface

The old legacy erl_interface library (functions with prefix erl_) was removed in OTP 23. These parts of erl_interface has been informally deprecated for a very long time, and was formally deprecated in OTP 22. You typically want to replace the usage of the erl_interface library with the use of the ei library which also is part of the erl_interface application.

httpd_conf module

API functions in the module called httpd_conf was deprecated in favor of standard modules such as lists, string, filelib, and erlang. Formally deprecated as of OTP 18.

inets - httpd Apache config files

Support for the Apache-compatible config files was removed in OTP 23. A new config file format was introduced in OTP 12.

SSL/TLS

For security reasons SSL-3.0 is no longer supported at all.

Functions Removed in OTP 23

erlang:get_stacktrace/0 (use the new try/catch syntax for retrieving the stack backtrace)
httpd_conf:check_enum/2 (use lists:member/2 instead)
httpd_conf:clean/1 (use sting:strip/1 instead or possibly the re module)
httpd_conf:custom_clean/3 (use sting:strip/1 instead or possibly the re module)
httpd_conf:is_directory/1 (use filelib:is_dir/1 instead)
httpd_conf:is_file/1 (use filelib:is_file/1 instead)
httpd_conf:make_integer/1 (use erlang:list_to_integer/1 instead)

2.4 otp 22

Functions Removed in OTP 22

os_mon_mib:_/_ (this module was removed in OTP 22.0)

2.5 otp 20

Functions Removed in OTP 20

asn1ct:decode/_ (use Mod:decode/2 instead)
asn1ct:encode/_ (use Mod:encode/2 instead)
erlang:hash/2 (use erlang:phash2/2 instead)
ssl:connection_info/1 (use ssl:connection_information/[1,2] instead)
ssl:negotiated_next_protocol/1 (use ssl:negotiated_protocol/1 instead)

2.6 otp 19

Functions Removed in OTP 19

core_lib:get_anno/1 (use cerl:get_ann/1 instead)
core_lib:is_literal/1 (use cerl:is_literal/1 instead)
core_lib:is_literal_list/1 (use cerl:is_literal_list/1 instead)
core_lib:literal_value/1 (use cerl:concrete/1 instead)
core_lib:set_anno/2 (use cerl:set_ann/2 instead)
erl_lint:modify_line/2 (use erl_parse:map_anno/2 instead)
erl_parse:get_attribute/2 (erl_anno:{column,line,location,text}/1 instead)
erl_parse:get_attributes/1 (erl_anno:{column,line,location,text}/1 instead)
erl_parse:set_line/2 (use erl_anno:set_line/2)
erl_scan:attributes_info/_ (use erl_anno:{column,line,location,text}/1 instead)
erl_scan:set_attribute/3 (use erl_anno:set_line/2 instead)
erl_scan:token_info/_ (use erl_scan:{category,column,line,location,symbol,text}/1 instead)
rpc:safe_multi_server_call/2 (use rpc:multi_server_call/2 instead)
rpc:safe_multi_server_call/3 (use rpc:multi_server_call/3 instead)