Kernel

Reference Manual

Version 5.4.1

Table of Contents

kernel (App)
application
- Top of manual page
- ensure_all_started/1
- ensure_all_started/2
- ensure_started/1
- ensure_started/2
- get_all_env/0
- get_all_env/1
- get_all_key/0
- get_all_key/1
- get_application/0
- get_application/1
- get_env/1
- get_env/2
- get_env/3
- get_key/1
- get_key/2
- load/1
- load/2
- loaded_applications/0
- permit/2
- set_env/3
- set_env/4
- start/1
- start/2
- start_type/0
- stop/1
- takeover/2
- unload/1
- unset_env/2
- unset_env/3
- which_applications/0
- which_applications/1
- Module:config_change/3
- Module:prep_stop/1
- Module:start/2
- Module:start_phase/3
- Module:stop/1
auth
- Top of manual page
- cookie/0
- cookie/1
- is_auth/1
- node_cookie/1
- node_cookie/2
code
- Top of manual page
- add_path/1
- add_patha/1
- add_paths/1
- add_pathsa/1
- add_pathsz/1
- add_pathz/1
- all_loaded/0
- atomic_load/1
- clash/0
- compiler_dir/0
- del_path/1
- delete/1
- ensure_loaded/1
- ensure_modules_loaded/1
- finish_loading/1
- get_mode/0
- get_object_code/1
- get_path/0
- is_loaded/1
- is_module_native/1
- is_sticky/1
- lib_dir/0
- lib_dir/1
- lib_dir/2
- load_abs/1
- load_binary/3
- load_file/1
- modified_modules/0
- module_status/1
- objfile_extension/0
- prepare_loading/1
- priv_dir/1
- purge/1
- replace_path/2
- root_dir/0
- set_path/1
- soft_purge/1
- stick_dir/1
- unstick_dir/1
- where_is_file/1
- which/1
disk_log
- Top of manual page
- accessible_logs/0
- alog/2
- alog_terms/2
- balog/2
- balog_terms/2
- bchunk/2
- bchunk/3
- block/1
- block/2
- blog/2
- blog_terms/2
- breopen/3
- btruncate/2
- change_header/2
- change_notify/3
- change_size/2
- chunk/2
- chunk/3
- chunk_info/1
- chunk_step/3
- close/1
- format_error/1
- inc_wrap_file/1
- info/1
- lclose/1
- lclose/2
- log/2
- log_terms/2
- open/1
- pid2name/1
- reopen/2
- reopen/3
- sync/1
- truncate/1
- truncate/2
- unblock/1
erl_boot_server
- Top of manual page
- add_slave/1
- delete_slave/1
- start/1
- start_link/1
- which_slaves/0
erl_ddll
- Top of manual page
- demonitor/1
- format_error/1
- info/0
- info/1
- info/2
- load/2
- load_driver/2
- loaded_drivers/0
- monitor/2
- reload/2
- reload_driver/2
- try_load/3
- try_unload/2
- unload/1
- unload_driver/1
erl_prim_loader
erlang
error_handler
- Top of manual page
- raise_undef_exception/3
- undefined_function/3
- undefined_lambda/3
error_logger
- Top of manual page
- add_report_handler/1
- add_report_handler/2
- delete_report_handler/1
- error_msg/1
- error_msg/2
- error_report/1
- error_report/2
- format/2
- get_format_depth/0
- info_msg/1
- info_msg/2
- info_report/1
- info_report/2
- logfile/1
- tty/1
- warning_map/0
- warning_msg/1
- warning_msg/2
- warning_report/1
- warning_report/2
file
- Top of manual page
- advise/4
- allocate/3
- change_group/2
- change_mode/2
- change_owner/2
- change_owner/3
- change_time/2
- change_time/3
- close/1
- consult/1
- copy/2
- copy/3
- datasync/1
- del_dir/1
- delete/1
- eval/1
- eval/2
- format_error/1
- get_cwd/0
- get_cwd/1
- list_dir/1
- list_dir_all/1
- make_dir/1
- make_link/2
- make_symlink/2
- native_name_encoding/0
- open/2
- path_consult/2
- path_eval/2
- path_open/3
- path_script/2
- path_script/3
- pid2name/1
- position/2
- pread/2
- pread/3
- pwrite/2
- pwrite/3
- read/2
- read_file/1
- read_file_info/1
- read_file_info/2
- read_line/1
- read_link/1
- read_link_all/1
- read_link_info/1
- read_link_info/2
- rename/2
- script/1
- script/2
- sendfile/2
- sendfile/5
- set_cwd/1
- sync/1
- truncate/1
- write/2
- write_file/2
- write_file/3
- write_file_info/2
- write_file_info/3
gen_sctp
- Top of manual page
- abort/2
- close/1
- connect/4
- connect/5
- connect_init/4
- connect_init/5
- controlling_process/2
- eof/2
- error_string/1
- listen/2
- open/0
- open/1
- open/2
- peeloff/2
- recv/1
- recv/2
- send/3
- send/4
gen_tcp
- Top of manual page
- accept/1
- accept/2
- close/1
- connect/3
- connect/4
- controlling_process/2
- listen/2
- recv/2
- recv/3
- send/2
- shutdown/2
gen_udp
- Top of manual page
- close/1
- controlling_process/2
- open/1
- open/2
- recv/2
- recv/3
- send/4
global
- Top of manual page
- del_lock/1
- del_lock/2
- notify_all_name/3
- random_exit_name/3
- random_notify_name/3
- re_register_name/2
- re_register_name/3
- register_name/2
- register_name/3
- registered_names/0
- send/2
- set_lock/1
- set_lock/2
- set_lock/3
- sync/0
- trans/2
- trans/3
- trans/4
- unregister_name/1
- whereis_name/1
global_group
- Top of manual page
- global_groups/0
- info/0
- monitor_nodes/1
- own_nodes/0
- registered_names/1
- send/2
- send/3
- sync/0
- whereis_name/1
- whereis_name/2
heart
- Top of manual page
- clear_callback/0
- clear_cmd/0
- get_callback/0
- get_cmd/0
- get_options/0
- set_callback/2
- set_cmd/1
- set_options/1
inet
- Top of manual page
- close/1
- format_error/1
- get_rc/0
- getaddr/2
- getaddrs/2
- gethostbyaddr/1
- gethostbyname/1
- gethostbyname/2
- gethostname/0
- getifaddrs/0
- getopts/2
- getstat/1
- getstat/2
- ntoa/1
- parse_address/1
- parse_ipv4_address/1
- parse_ipv4strict_address/1
- parse_ipv6_address/1
- parse_ipv6strict_address/1
- parse_strict_address/1
- peername/1
- peernames/1
- peernames/2
- port/1
- setopts/2
- sockname/1
- socknames/1
- socknames/2
inet_res
- Top of manual page
- getbyname/2
- getbyname/3
- gethostbyaddr/1
- gethostbyaddr/2
- gethostbyname/1
- gethostbyname/2
- gethostbyname/3
- lookup/3
- lookup/4
- lookup/5
- nnslookup/4
- nnslookup/5
- nslookup/3
- nslookup/4
- resolve/3
- resolve/4
- resolve/5
init
logger
- Top of manual page
- add_handler/3
- add_handler_filter/3
- add_logger_filter/2
- alert/1
- alert/2
- alert/2
- compare_levels/2
- critical/1
- critical/2
- critical/2
- debug/1
- debug/2
- debug/2
- emergency/1
- emergency/2
- emergency/2
- error/1
- error/2
- error/2
- get_handler_config/1
- get_logger_config/0
- get_process_metadata/0
- i/0
- i/1
- info/1
- info/2
- info/2
- log/2
- log/3
- log/4
- notice/1
- notice/2
- notice/2
- remove_handler/1
- remove_handler_filter/2
- remove_logger_filter/1
- reset_module_level/1
- set_handler_config/2
- set_handler_config/3
- set_logger_config/1
- set_logger_config/2
- set_module_level/2
- set_process_metadata/1
- unset_process_metadata/0
- warning/1
- warning/2
- warning/2
logger_filters
- Top of manual page
- domain/2
- level/2
- progress/2
- remote_gl/2
logger_formatter
- Top of manual page
- format/2
logger_std_h
net_adm
- Top of manual page
- dns_hostname/1
- host_file/0
- localhost/0
- names/0
- names/1
- ping/1
- world/0
- world/1
- world_list/1
- world_list/2
net_kernel
- Top of manual page
- allow/1
- connect_node/1
- get_net_ticktime/0
- getopts/2
- monitor_nodes/1
- monitor_nodes/2
- set_net_ticktime/1
- set_net_ticktime/2
- setopts/2
- start/1
- start/1
- start/1
- stop/0
os
- Top of manual page
- cmd/1
- find_executable/1
- find_executable/2
- getenv/0
- getenv/1
- getenv/2
- getpid/0
- perf_counter/0
- perf_counter/1
- putenv/2
- set_signal/2
- system_time/0
- system_time/1
- timestamp/0
- type/0
- unsetenv/1
- version/0
pg2
- Top of manual page
- create/1
- delete/1
- get_closest_pid/1
- get_local_members/1
- get_members/1
- join/2
- leave/2
- start/0
- start_link/0
- which_groups/0
rpc
- Top of manual page
- abcast/2
- abcast/3
- async_call/4
- block_call/4
- block_call/5
- call/4
- call/5
- cast/4
- eval_everywhere/3
- eval_everywhere/4
- multi_server_call/2
- multi_server_call/3
- multicall/3
- multicall/4
- multicall/5
- nb_yield/1
- nb_yield/2
- parallel_eval/1
- pinfo/1
- pinfo/2
- pmap/3
- sbcast/2
- sbcast/3
- server_call/4
- yield/1
seq_trace
- Top of manual page
- get_system_tracer/0
- get_token/0
- get_token/1
- print/1
- print/2
- reset_trace/0
- set_system_tracer/1
- set_token/1
- set_token/2
user
wrap_log_reader
- Top of manual page
- chunk/1
- chunk/2
- close/1
- open/1
- open/2
zlib
app
config

Kernel Reference Manual

Version 5.4.1

October 7, 2026