hauleth.dev
Pure Erlang implementation of 9p2000 protocol
filesystem
fs
9p2000
erlang
9p
Test sysfs implementation
+165
-11
+8
-8
flake.nix
+8
-8
flake.nix
···
34
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devenv.shells.default = {
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languages.erlang.enable = true;
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-
packages = [ kamid ];
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packages = [ kamid pkgs._9pfs ];
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env.ERL_FLAGS = ''
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-kernel logger_level debug
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-kernel logger '[
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{filters, log, [{no_progress, {fun logger_filters:progress/2, stop}}]}
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]'
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-kernel shell_history enabled
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'';
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# env.ERL_FLAGS = ''
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# -kernel logger_level debug
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# -kernel logger '[
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# {filters, log, [{no_progress, {fun logger_filters:progress/2, stop}}]}
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# ]'
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# -kernel shell_history enabled
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# '';
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};
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};
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};
+4
-1
rebar.config
+4
-1
rebar.config
+7
-2
src/e9p_server.erl
+7
-2
src/e9p_server.erl
···
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8
9
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-include_lib("kernel/include/logger.hrl").
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-export([start_link/2,
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setup_acceptor/3,
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-export([start/2,
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start_link/2]).
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-export([setup_acceptor/3,
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accept_loop/2,
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loop/1
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]).
···
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fids = #{},
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handler
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}).
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+
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start(Port, Handler) ->
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proc_lib:start(?MODULE, setup_acceptor, [self(), Port, Handler]).
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start_link(Port, Handler) ->
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proc_lib:start_link(?MODULE, setup_acceptor, [self(), Port, Handler]).
+146
test/e9p_sysfs_SUITE.erl
+146
test/e9p_sysfs_SUITE.erl
···
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+
% SPDX-FileCopyrightText: 2026 Łukasz Niemier <~@hauleth.dev>
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%
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% SPDX-License-Identifier: Apache-2.0
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+
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-module(e9p_sysfs_SUITE).
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+
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-compile(export_all).
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+
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-include_lib("stdlib/include/assert.hrl").
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-include_lib("common_test/include/ct.hrl").
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+
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all() -> [
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can_list_mount_content,
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current_process_is_listed,
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current_process_current_function,
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system_info_atom_count,
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applications_list,
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application_info,
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application_env
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].
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+
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init_per_suite(Config) ->
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PrivDir = ?config(priv_dir, Config),
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Path = filename:join(PrivDir, "sysfs"),
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Port = 19999,
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ok = file:make_dir(Path),
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{ok, PID} = e9p_server:start(Port, {e9p_sysfs, []}),
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ct:pal(Path),
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ct:sleep(1000),
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Cmd = io_lib:format("9pfs -p ~B localhost ~s",
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[Port, Path]),
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ct:pal(Cmd),
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_Out = os:cmd(Cmd, #{ exception_on_failure => true }),
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[{sysfs, PID}, {mount, Path} | Config].
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+
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end_per_suite(Config) ->
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PID = ?config(sysfs, Config),
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Mount = ?config(mount, Config),
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os:cmd(["umount ", Mount], #{exception_on_failure => true}),
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erlang:exit(PID, normal),
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Config.
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+
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can_list_mount_content(Config) ->
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Mount = ?config(mount, Config),
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ct:pal(Mount),
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?assertEqual([
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"applications",
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"processes",
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"system_info"
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], ls(Mount)).
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+
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current_process_is_listed(Config) ->
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Mount = ?config(mount, Config),
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Path = filename:join([Mount, "processes", pid_to_list(self())]),
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?assertEqual([
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"current_function",
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"dictionary",
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"error_handler",
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"garbage_collection",
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"group_leader",
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"heap_size",
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"initial_call",
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"links",
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"message_queue_len",
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"priority",
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"reductions",
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"stack_size",
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"status",
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"total_heap_size",
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"trap_exit"
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], ls(Path)).
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+
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current_process_current_function(Config) ->
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Mount = ?config(mount, Config),
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Path = filename:join([
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Mount,
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"processes",
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pid_to_list(self()),
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"current_function"
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]),
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{ok, Bin} = file:read_file(Path),
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?assertEqual(~"{gen,do_call,4}", Bin).
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+
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system_info_atom_count(Config) ->
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Mount = ?config(mount, Config),
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Path = filename:join([
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Mount,
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"system_info",
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"atom_count"
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]),
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{ok, Bin} = file:read_file(Path),
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?assertEqual(erlang:system_info(atom_count), binary_to_integer(Bin)).
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+
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applications_list(Config) ->
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Mount = ?config(mount, Config),
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Path = filename:join([
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Mount,
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"applications"
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]),
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List = ls(Path),
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Apps = lists:sort(lists:map(fun({AppName, _, _}) -> atom_to_list(AppName) end,
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application:loaded_applications())),
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?assertEqual(Apps, List).
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+
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application_info(Config) ->
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Mount = ?config(mount, Config),
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Path = filename:join([
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Mount,
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"applications",
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"kernel"
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]),
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List = ls(Path),
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?assertEqual([
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"applications",
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"description",
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"env",
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"id",
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"included_applications",
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"maxP",
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"maxT",
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"mod",
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"modules",
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"optional_applications",
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"registered",
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"start_phases",
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"vsn"
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], List).
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+
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application_env(Config) ->
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Mount = ?config(mount, Config),
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Path = filename:join([
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+
Mount,
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"applications",
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"kernel",
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"env"
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]),
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{ok, [Read]} = file:consult(Path),
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Env = application:get_all_env(kernel),
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?assertEqual(Read, Env).
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+
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%% Helpers
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+
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ls(Path) ->
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{ok, Files} = file:list_dir(Path),
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% Remove `.fscache` added on macOS
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+
lists:sort(Files) -- [".fscache"].