diff options
Diffstat (limited to 'erts/preloaded/src')
| -rw-r--r-- | erts/preloaded/src/Makefile | 3 | ||||
| -rw-r--r-- | erts/preloaded/src/erl_prim_loader.erl | 20 | ||||
| -rw-r--r-- | erts/preloaded/src/erlang.erl | 201 | ||||
| -rw-r--r-- | erts/preloaded/src/erts.app.src | 3 | ||||
| -rw-r--r-- | erts/preloaded/src/erts_internal.erl | 127 | ||||
| -rw-r--r-- | erts/preloaded/src/init.erl | 9 | ||||
| -rw-r--r-- | erts/preloaded/src/prim_buffer.erl | 140 | ||||
| -rw-r--r-- | erts/preloaded/src/prim_file.erl | 1991 | ||||
| -rw-r--r-- | erts/preloaded/src/prim_inet.erl | 51 |
9 files changed, 1039 insertions, 1506 deletions
diff --git a/erts/preloaded/src/Makefile b/erts/preloaded/src/Makefile index edb9f35258..a2872082f2 100644 --- a/erts/preloaded/src/Makefile +++ b/erts/preloaded/src/Makefile @@ -36,6 +36,7 @@ include $(ERL_TOP)/lib/kernel/vsn.mk PRE_LOADED_ERL_MODULES = \ erl_prim_loader \ init \ + prim_buffer \ prim_file \ prim_inet \ zlib \ @@ -116,7 +117,7 @@ prim_eval.beam: prim_eval.S prim_eval.abstr # Include dependencies -- list below added by PaN $(EBIN)/erl_prim_loader.beam: $(KERNEL_SRC)/inet_boot.hrl $(KERNEL_INCLUDE)/file.hrl -$(EBIN)/prim_file.beam: $(KERNEL_INCLUDE)/file.hrl +$(EBIN)/prim_file.beam: $(KERNEL_SRC)/file_int.hrl $(KERNEL_INCLUDE)/file.hrl $(EBIN)/prim_inet.beam: $(KERNEL_SRC)/inet_int.hrl $(KERNEL_INCLUDE)/inet_sctp.hrl $(EBIN)/prim_zip.beam: zip_internal.hrl $(KERNEL_INCLUDE)/file.hrl $(STDLIB_INCLUDE)/zip.hrl $(EBIN)/init.erl: $(KERNEL_INCLUDE)/file.hrl diff --git a/erts/preloaded/src/erl_prim_loader.erl b/erts/preloaded/src/erl_prim_loader.erl index 1d09aeded9..d16fe5a0bc 100644 --- a/erts/preloaded/src/erl_prim_loader.erl +++ b/erts/preloaded/src/erl_prim_loader.erl @@ -151,9 +151,8 @@ start_inet(Parent) -> loop(State, Parent, []). start_efile(Parent) -> - {ok, Port} = prim_file:start(), %% Check that we started in a valid directory. - case prim_file:get_cwd(Port) of + case prim_file:get_cwd() of {error, _} -> %% At this point in the startup, we have no error_logger at all. Report = "Invalid current directory or invalid filename " @@ -165,7 +164,7 @@ start_efile(Parent) -> end, PS = prim_init(), State = #state {loader = efile, - data = Port, + data = noport, timeout = ?EFILE_IDLE_TIMEOUT, prim_state = PS}, loop(State, Parent, []). @@ -401,12 +400,12 @@ handle_get_cwd(State = #state{loader = inet}, Drive) -> ?SAFE2(inet_get_cwd(State, Drive), State). handle_stop(State = #state{loader = efile}) -> - efile_stop_port(State); + State; handle_stop(State = #state{loader = inet}) -> inet_stop_port(State). -handle_exit(State = #state{loader = efile}, Who, Reason) -> - efile_exit_port(State, Who, Reason); +handle_exit(State = #state{loader = efile}, _Who, _Reason) -> + State; handle_exit(State = #state{loader = inet}, Who, Reason) -> inet_exit_port(State, Who, Reason). @@ -475,15 +474,6 @@ efile_get_cwd(#state{prim_state = PS} = State, Drive) -> {Res, PS2} = prim_get_cwd(PS, Drive), {Res, State#state{prim_state = PS2}}. -efile_stop_port(#state{data=Port}=State) -> - prim_file:close(Port), - State#state{data=noport}. - -efile_exit_port(State, Port, Reason) when State#state.data =:= Port -> - exit({port_died,Reason}); -efile_exit_port(State, _Port, _Reason) -> - State. - efile_timeout_handler(State, _Parent) -> prim_purge_cache(), State. diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl index f6410d9050..d352e11751 100644 --- a/erts/preloaded/src/erlang.erl +++ b/erts/preloaded/src/erlang.erl @@ -31,8 +31,7 @@ -export([localtime_to_universaltime/1]). -export([suspend_process/1]). -export([min/2, max/2]). --export([dlink/1, dunlink/1, dsend/2, dsend/3, dgroup_leader/2, - dexit/2, dmonitor_node/3, dmonitor_p/2]). +-export([dmonitor_node/3, dmonitor_p/2]). -export([delay_trap/2]). -export([set_cookie/2, get_cookie/0]). -export([nodes/0]). @@ -44,9 +43,13 @@ -export([memory/0, memory/1]). -export([alloc_info/1, alloc_sizes/1]). --export([gather_sched_wall_time_result/1, - await_sched_wall_time_modifications/2, - gather_gc_info_result/1]). +-export([gather_gc_info_result/1]). + +-export([dist_ctrl_input_handler/2, + dist_ctrl_put_data/2, + dist_ctrl_get_data/1, + dist_ctrl_get_data_notification/1, + dist_get_stat/1]). -deprecated([now/0]). @@ -87,6 +90,10 @@ -export_type([prepared_code/0]). +-opaque dist_handle() :: atom(). + +-export_type([dist_handle/0]). + -type iovec() :: [binary()]. -export_type([iovec/0]). @@ -114,7 +121,7 @@ -export([crc32/2, crc32_combine/3, date/0, decode_packet/3]). -export([delete_element/2]). -export([delete_module/1, demonitor/1, demonitor/2, display/1]). --export([display_nl/0, display_string/1, dist_exit/3, erase/0, erase/1]). +-export([display_nl/0, display_string/1, erase/0, erase/1]). -export([error/1, error/2, exit/1, exit/2, external_size/1]). -export([external_size/2, finish_after_on_load/2, finish_loading/1, float/1]). -export([float_to_binary/1, float_to_binary/2, @@ -417,9 +424,11 @@ binary_to_term(_Binary) -> erlang:nif_error(undefined). %% binary_to_term/2 --spec binary_to_term(Binary, Opts) -> term() when +-spec binary_to_term(Binary, Opts) -> term() | {term(), Used} when Binary :: ext_binary(), - Opts :: [safe]. + Opt :: safe | used, + Opts :: [Opt], + Used :: pos_integer(). binary_to_term(_Binary, _Opts) -> erlang:nif_error(undefined). @@ -692,14 +701,6 @@ display_nl() -> display_string(_P1) -> erlang:nif_error(undefined). -%% dist_exit/3 --spec erlang:dist_exit(P1, P2, P3) -> true when - P1 :: pid(), - P2 :: kill | noconnection | normal, - P3 :: pid() | port(). -dist_exit(_P1, _P2, _P3) -> - erlang:nif_error(undefined). - %% dt_append_vm_tag_data/1 -spec erlang:dt_append_vm_tag_data(IoData) -> IoDataRet when IoData :: iodata(), @@ -1651,7 +1652,7 @@ setnode(_P1, _P2) -> erlang:nif_error(undefined). %% setnode/3 --spec erlang:setnode(P1, P2, P3) -> true when +-spec erlang:setnode(P1, P2, P3) -> dist_handle() when P1 :: atom(), P2 :: port(), P3 :: {term(), term(), term(), term()}. @@ -2100,7 +2101,7 @@ nodes(_Arg) -> | stream | {line, L :: non_neg_integer()} | {cd, Dir :: string() | binary()} - | {env, Env :: [{Name :: string(), Val :: string() | false}]} + | {env, Env :: [{Name :: os:env_var_name(), Val :: os:env_var_value() | false}]} | {args, [string() | binary()]} | {arg0, string() | binary()} | exit_status @@ -2334,7 +2335,8 @@ spawn_opt(_Tuple) -> MSAcc_Thread :: #{ type := MSAcc_Thread_Type, id := MSAcc_Thread_Id, counters := MSAcc_Counters}, - MSAcc_Thread_Type :: scheduler | async | aux, + MSAcc_Thread_Type :: async | aux | dirty_io_scheduler + | dirty_cpu_scheduler | poll | scheduler, MSAcc_Thread_Id :: non_neg_integer(), MSAcc_Counters :: #{ MSAcc_Thread_State => non_neg_integer() }, MSAcc_Thread_State :: alloc | aux | bif | busy_wait | check_io | @@ -3218,33 +3220,51 @@ port_get_data(_Port) -> erlang:nif_error(undefined). %% -%% If the emulator wants to perform a distributed command and -%% a connection is not established to the actual node the following -%% functions are called in order to set up the connection and then -%% reactivate the command. +%% Distribution channel management %% --spec erlang:dlink(pid() | port()) -> 'true'. -dlink(Pid) -> - case net_kernel:connect(erlang:node(Pid)) of - true -> erlang:link(Pid); - false -> erlang:dist_exit(erlang:self(), noconnection, Pid), true - end. +-spec erlang:dist_ctrl_input_handler(DHandle, InputHandler) -> 'ok' when + DHandle :: dist_handle(), + InputHandler :: pid(). -%% Can this ever happen? --spec erlang:dunlink(identifier()) -> 'true'. -dunlink(Pid) -> - case net_kernel:connect(erlang:node(Pid)) of - true -> erlang:unlink(Pid); - false -> true - end. +dist_ctrl_input_handler(_DHandle, _InputHandler) -> + erlang:nif_error(undefined). -dmonitor_node(Node, Flag, []) -> - case net_kernel:connect(Node) of - true -> erlang:monitor_node(Node, Flag, []); - false -> erlang:self() ! {nodedown, Node}, true - end; +-spec erlang:dist_ctrl_put_data(DHandle, Data) -> 'ok' when + DHandle :: dist_handle(), + Data :: iodata(). + +dist_ctrl_put_data(_DHandle, _Data) -> + erlang:nif_error(undefined). + +-spec erlang:dist_ctrl_get_data(DHandle) -> Data | 'none' when + DHandle :: dist_handle(), + Data :: iodata(). + +dist_ctrl_get_data(_DHandle) -> + erlang:nif_error(undefined). + +-spec erlang:dist_ctrl_get_data_notification(DHandle) -> 'ok' when + DHandle :: dist_handle(). + +dist_ctrl_get_data_notification(_DHandle) -> + erlang:nif_error(undefined). + +-spec erlang:dist_get_stat(DHandle) -> Res when + DHandle :: dist_handle(), + InputPackets :: non_neg_integer(), + OutputPackets :: non_neg_integer(), + PendingOutputPackets :: boolean(), + Res :: {'ok', InputPackets, OutputPackets, PendingOutputPackets}. +dist_get_stat(_DHandle) -> + erlang:nif_error(undefined). + + +dmonitor_node(Node, _Flag, []) -> + %% Only called when auto-connect attempt failed early in VM + erlang:self() ! {nodedown, Node}, + true; dmonitor_node(Node, Flag, Opts) -> case lists:member(allow_passive_connect, Opts) of true -> @@ -3256,71 +3276,12 @@ dmonitor_node(Node, Flag, Opts) -> dmonitor_node(Node,Flag,[]) end. -dgroup_leader(Leader, Pid) -> - case net_kernel:connect(erlang:node(Pid)) of - true -> erlang:group_leader(Leader, Pid); - false -> true %% bad arg ? - end. - -dexit(Pid, Reason) -> - case net_kernel:connect(erlang:node(Pid)) of - true -> erlang:exit(Pid, Reason); - false -> true - end. - -dsend(Pid, Msg) when erlang:is_pid(Pid) -> - case net_kernel:connect(erlang:node(Pid)) of - true -> erlang:send(Pid, Msg); - false -> Msg - end; -dsend(Port, Msg) when erlang:is_port(Port) -> - case net_kernel:connect(erlang:node(Port)) of - true -> erlang:send(Port, Msg); - false -> Msg - end; -dsend({Name, Node}, Msg) -> - case net_kernel:connect(Node) of - true -> erlang:send({Name,Node}, Msg); - false -> Msg; - ignored -> Msg % Not distributed. - end. - -dsend(Pid, Msg, Opts) when erlang:is_pid(Pid) -> - case net_kernel:connect(erlang:node(Pid)) of - true -> erlang:send(Pid, Msg, Opts); - false -> ok - end; -dsend(Port, Msg, Opts) when erlang:is_port(Port) -> - case net_kernel:connect(erlang:node(Port)) of - true -> erlang:send(Port, Msg, Opts); - false -> ok - end; -dsend({Name, Node}, Msg, Opts) -> - case net_kernel:connect(Node) of - true -> erlang:send({Name,Node}, Msg, Opts); - false -> ok; - ignored -> ok % Not distributed. - end. - -spec erlang:dmonitor_p('process', pid() | {atom(),atom()}) -> reference(). dmonitor_p(process, ProcSpec) -> - %% ProcSpec = pid() | {atom(),atom()} - %% ProcSpec CANNOT be an atom because a locally registered process - %% is never handled here. - Node = case ProcSpec of - {S,N} when erlang:is_atom(S), - erlang:is_atom(N), - N =/= erlang:node() -> N; - _ when erlang:is_pid(ProcSpec) -> erlang:node(ProcSpec) - end, - case net_kernel:connect(Node) of - true -> - erlang:monitor(process, ProcSpec); - false -> - Ref = erlang:make_ref(), - erlang:self() ! {'DOWN', Ref, process, ProcSpec, noconnection}, - Ref - end. + %% Only called when auto-connect attempt failed early in VM + Ref = erlang:make_ref(), + erlang:self() ! {'DOWN', Ref, process, ProcSpec, noconnection}, + Ref. %% %% Trap function used when modified timing has been enabled. @@ -4020,38 +3981,6 @@ receive_allocator(Ref, N, Acc) -> receive_allocator(Ref, N-1, insert_info(InfoList, Acc)) end. --spec erlang:await_sched_wall_time_modifications(Ref, Result) -> boolean() when - Ref :: reference(), - Result :: boolean(). - -await_sched_wall_time_modifications(Ref, Result) -> - sched_wall_time(Ref, erlang:system_info(schedulers)), - Result. - --spec erlang:gather_sched_wall_time_result(Ref) -> [{pos_integer(), - non_neg_integer(), - non_neg_integer()}] when - Ref :: reference(). - -gather_sched_wall_time_result(Ref) when erlang:is_reference(Ref) -> - sched_wall_time(Ref, erlang:system_info(schedulers), []). - -sched_wall_time(_Ref, 0) -> - ok; -sched_wall_time(Ref, N) -> - receive Ref -> sched_wall_time(Ref, N-1) end. - -sched_wall_time(_Ref, 0, Acc) -> - Acc; -sched_wall_time(Ref, N, undefined) -> - receive {Ref, _} -> sched_wall_time(Ref, N-1, undefined) end; -sched_wall_time(Ref, N, Acc) -> - receive - {Ref, undefined} -> sched_wall_time(Ref, N-1, undefined); - {Ref, SWTL} when erlang:is_list(SWTL) -> sched_wall_time(Ref, N-1, Acc ++ SWTL); - {Ref, SWT} -> sched_wall_time(Ref, N-1, [SWT|Acc]) - end. - -spec erlang:gather_gc_info_result(Ref) -> {number(),number(),0} when Ref :: reference(). diff --git a/erts/preloaded/src/erts.app.src b/erts/preloaded/src/erts.app.src index 7ab06164b4..338f168158 100644 --- a/erts/preloaded/src/erts.app.src +++ b/erts/preloaded/src/erts.app.src @@ -28,6 +28,7 @@ init, otp_ring0, erts_code_purger, + prim_buffer, prim_eval, prim_file, prim_inet, @@ -37,7 +38,7 @@ {registered, []}, {applications, []}, {env, []}, - {runtime_dependencies, ["stdlib-3.0", "kernel-5.0", "sasl-3.0.1"]} + {runtime_dependencies, ["stdlib-3.5", "kernel-6.0", "sasl-3.0.1"]} ]}. %% vim: ft=erlang diff --git a/erts/preloaded/src/erts_internal.erl b/erts/preloaded/src/erts_internal.erl index 26fb1458af..a083e9ac2f 100644 --- a/erts/preloaded/src/erts_internal.erl +++ b/erts/preloaded/src/erts_internal.erl @@ -32,7 +32,7 @@ -export([await_port_send_result/3]). -export([cmp_term/2]). -export([map_to_tuple_keys/1, term_type/1, map_hashmap_children/1, - maps_to_list/2]). + map_next/3]). -export([open_port/2, port_command/3, port_connect/2, port_close/1, port_control/3, port_call/3, port_info/1, port_info/2]). @@ -61,6 +61,15 @@ -export([trace/3, trace_pattern/3]). +-export([dist_ctrl_put_data/2]). + +-export([new_connection/1]). +-export([abort_connection/2]). + +-export([scheduler_wall_time/1, system_flag_scheduler_wall_time/1, + gather_sched_wall_time_result/1, + await_sched_wall_time_modifications/2]). + %% Auto import name clash -export([check_process_code/1]). @@ -365,20 +374,23 @@ term_type(_T) -> map_hashmap_children(_M) -> erlang:nif_error(undefined). +%% return the next assoc in the iterator and a new iterator +-spec map_next(I, M, A) -> {K,V,NI} | list() when + I :: non_neg_integer(), + M :: map(), + K :: term(), + V :: term(), + A :: iterator | list(), + NI :: maps:iterator(). + +map_next(_I, _M, _A) -> + erlang:nif_error(undefined). + -spec erts_internal:flush_monitor_messages(Ref, Multi, Res) -> term() when Ref :: reference(), Multi :: boolean(), Res :: term(). -%% return a list of key value pairs, at most of length N --spec maps_to_list(M,N) -> Pairs when - M :: map(), - N :: integer(), - Pairs :: list(). - -maps_to_list(_M, _N) -> - erlang:nif_error(undefined). - %% erlang:demonitor(Ref, [flush]) traps to %% erts_internal:flush_monitor_messages(Ref, Res) when %% it needs to flush monitor messages. @@ -461,3 +473,98 @@ trace(_PidSpec, _How, _FlagList) -> FlagList :: [ ]. trace_pattern(_MFA, _MatchSpec, _FlagList) -> erlang:nif_error(undefined). + +-spec dist_ctrl_put_data(DHandle, Data) -> 'ok' when + DHandle :: erlang:dist_handle(), + Data :: iolist(). + +dist_ctrl_put_data(DHandle, IoList) -> + %% + %% Helper for erlang:dist_ctrl_put_data/2 + %% + %% erlang:dist_ctrl_put_data/2 traps to + %% this function if second argument is + %% a list... + %% + try + Binary = erlang:iolist_to_binary(IoList), + %% Restart erlang:dist_ctrl_put_data/2 + %% with the iolist converted to a binary... + erlang:dist_ctrl_put_data(DHandle, Binary) + catch + Class : Reason -> + %% Throw exception as if thrown from + %% erlang:dist_ctrl_put_data/2 ... + RootST = try erlang:error(Reason) + catch + error:Reason -> + case erlang:get_stacktrace() of + [] -> []; + ST -> tl(ST) + end + end, + StackTrace = [{erlang, dist_ctrl_put_data, + [DHandle, IoList], []} + | RootST], + erlang:raise(Class, Reason, StackTrace) + end. + + +-spec erts_internal:new_connection(Node) -> ConnId when + Node :: atom(), + ConnId :: {integer(), erlang:dist_handle()}. +new_connection(_Node) -> + erlang:nif_error(undefined). + +-spec erts_internal:abort_connection(Node, ConnId) -> boolean() when + Node :: atom(), + ConnId :: {integer(), erlang:dist_handle()}. +abort_connection(_Node, _ConnId) -> + erlang:nif_error(undefined). + +%% Scheduler wall time + +-spec erts_internal:system_flag_scheduler_wall_time(Enable) -> boolean() when + Enable :: boolean(). + +system_flag_scheduler_wall_time(Bool) -> + kernel_refc:scheduler_wall_time(Bool). + + +-spec erts_internal:await_sched_wall_time_modifications(Ref, Result) -> boolean() when + Ref :: reference(), + Result :: boolean(). + +-spec erts_internal:scheduler_wall_time(Enable) -> boolean() when + Enable :: boolean(). + +scheduler_wall_time(_Enable) -> + erlang:nif_error(undefined). + +await_sched_wall_time_modifications(Ref, Result) -> + sched_wall_time(Ref, erlang:system_info(schedulers)), + Result. + +-spec erts_internal:gather_sched_wall_time_result(Ref) -> [{pos_integer(), + non_neg_integer(), + non_neg_integer()}] when + Ref :: reference(). + +gather_sched_wall_time_result(Ref) when erlang:is_reference(Ref) -> + sched_wall_time(Ref, erlang:system_info(schedulers), []). + +sched_wall_time(_Ref, 0) -> + ok; +sched_wall_time(Ref, N) -> + receive Ref -> sched_wall_time(Ref, N-1) end. + +sched_wall_time(_Ref, 0, Acc) -> + Acc; +sched_wall_time(Ref, N, undefined) -> + receive {Ref, _} -> sched_wall_time(Ref, N-1, undefined) end; +sched_wall_time(Ref, N, Acc) -> + receive + {Ref, undefined} -> sched_wall_time(Ref, N-1, undefined); + {Ref, SWTL} when erlang:is_list(SWTL) -> sched_wall_time(Ref, N-1, Acc ++ SWTL); + {Ref, SWT} -> sched_wall_time(Ref, N-1, [SWT|Acc]) + end. diff --git a/erts/preloaded/src/init.erl b/erts/preloaded/src/init.erl index 34a9f6b8b9..e0ae6b1656 100644 --- a/erts/preloaded/src/init.erl +++ b/erts/preloaded/src/init.erl @@ -32,8 +32,8 @@ %% (Optional - default efile) %% -hosts [Node] : List of hosts from which we can boot. %% (Mandatory if -loader inet) -%% -mode embedded : Load all modules at startup, no automatic loading -%% -mode interactive : Auto load modules (default system behaviour). +%% -mode interactive : Auto load modules not needed at startup (default system behaviour). +%% -mode embedded : Load all modules in the boot script, disable auto loading. %% -path : Override path in bootfile. %% -pa Path+ : Add my own paths first. %% -pz Path+ : Add my own paths last. @@ -200,10 +200,11 @@ boot(BootArgs) -> register(init, self()), process_flag(trap_exit, true), - %% Load the zlib nif + %% Load the static nifs zlib:on_load(), - %% Load the tracer nif erl_tracer:on_load(), + prim_buffer:on_load(), + prim_file:on_load(), {Start0,Flags,Args} = parse_boot_args(BootArgs), %% We don't get to profile parsing of BootArgs diff --git a/erts/preloaded/src/prim_buffer.erl b/erts/preloaded/src/prim_buffer.erl new file mode 100644 index 0000000000..e0d35a6792 --- /dev/null +++ b/erts/preloaded/src/prim_buffer.erl @@ -0,0 +1,140 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2017. All Rights Reserved. +%% +%% Licensed under the Apache License, Version 2.0 (the "License"); +%% you may not use this file except in compliance with the License. +%% You may obtain a copy of the License at +%% +%% http://www.apache.org/licenses/LICENSE-2.0 +%% +%% Unless required by applicable law or agreed to in writing, software +%% distributed under the License is distributed on an "AS IS" BASIS, +%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +%% See the License for the specific language governing permissions and +%% limitations under the License. +%% +%% %CopyrightEnd% +%% +-module(prim_buffer). + +-export([on_load/0]). + +%% This is a mutable binary buffer that helps break out buffering logic from +%% NIFs/drivers, which is often the only thing that prevents the C code from +%% being reduced to bare system call wrappers. +%% +%% All operations in this file are thread-unsafe and risk crashing the emulator +%% if you're not careful. + +-export([new/0, size/1, wipe/1, read/2, read_iovec/2, write/2, skip/2]). + +-export([find_byte_index/2]). + +-export([try_lock/1, unlock/1]). + +-type prim_buffer() :: term(). + +%% Controls when to copy rather than extract sub-binaries from the buffer, +%% reducing the risk of small reads keeping a large binary alive. +-define(COPYING_READ_LIMIT, 512). + +%% Reads that fit into heap binaries are always copied since the cost of +%% peeking binaries that short is largely equivalent to copying. +-define(ERL_ONHEAP_BIN_LIMIT, 64). + +on_load() -> + case erlang:load_nif(atom_to_list(?MODULE), 0) of + ok -> ok + end. + +-spec new() -> prim_buffer(). +new() -> + erlang:nif_error(undef). + +-spec size(Buffer :: prim_buffer()) -> non_neg_integer(). +size(_Buffer) -> + erlang:nif_error(undef). + +%% Reads data as a binary from the front of the buffer. This will almost always +%% result in copying so it should be avoided unless you absolutely must have a +%% binary. +-spec read(Buffer :: prim_buffer(), Size :: non_neg_integer()) -> binary(). +read(Buffer, Size) when Size =< ?ERL_ONHEAP_BIN_LIMIT -> + copying_read(Buffer, Size); +read(Buffer, Size) when Size > ?ERL_ONHEAP_BIN_LIMIT -> + iolist_to_binary(read_iovec(Buffer, Size)). + +%% Reads data as an erlang:iovec() binary from the front of the buffer, +%% avoiding copying if reasonable. +-spec read_iovec(Buffer, Size) -> IOVec when + Buffer :: prim_buffer(), + Size :: non_neg_integer(), + IOVec :: erlang:iovec(). +read_iovec(Buffer, Size) when Size =< ?ERL_ONHEAP_BIN_LIMIT -> + [copying_read(Buffer, Size)]; +read_iovec(Buffer, Size) when Size > ?ERL_ONHEAP_BIN_LIMIT -> + Head = peek_head(Buffer), + HeadSize = byte_size(Head), + if + (HeadSize - Size) > ?COPYING_READ_LIMIT, Size =< ?COPYING_READ_LIMIT -> + [copying_read(Buffer, Size)]; + HeadSize > Size -> + skip(Buffer, Size), + {First, _Rest} = split_binary(Head, Size), + [First]; + HeadSize < Size -> + skip(Buffer, HeadSize), + [Head | read_iovec(Buffer, Size - HeadSize)]; + HeadSize =:= Size -> + skip(Buffer, Size), + [Head] + end. + +%% Writes an erlang:iovec() to the back of the buffer. +-spec write(Buffer :: prim_buffer(), IOVec :: erlang:iovec()) -> ok. +write(_Buffer, _IOVec) -> + erlang:nif_error(undef). + +%% Removes data from the front of the buffer without reading it. +-spec skip(Buffer :: prim_buffer(), Size :: non_neg_integer()) -> ok. +skip(_Buffer, _Size) -> + erlang:nif_error(undef). + +-spec wipe(Buffer :: prim_buffer()) -> ok. +wipe(Buffer) -> + skip(Buffer, prim_buffer:size(Buffer)). + +%% Finds the start-index of the first occurence of Needle, for implementing +%% read_line and similar. +-spec find_byte_index(Buffer, Needle) -> Result when + Buffer :: prim_buffer(), + Needle :: non_neg_integer(), + Result :: {ok, non_neg_integer()} | + not_found. +find_byte_index(_Buffer, _Needle) -> + erlang:nif_error(undef). + +%% Attempts to take a unique lock on the buffer. Failure handling is left to +%% the user. +-spec try_lock(Buffer :: prim_buffer()) -> acquired | busy. +try_lock(_Buffer) -> + erlang:nif_error(undef). + +-spec unlock(Buffer :: prim_buffer()) -> ok. +unlock(_Buffer) -> + erlang:nif_error(undef). + +%% Unexported helper functions: + +%% Reads data from the front of the buffer, returning a copy of the data to +%% avoid holding references. +-spec copying_read(Buffer :: prim_buffer(), Size :: non_neg_integer()) -> binary(). +copying_read(_Buffer, _Size) -> + erlang:nif_error(undef). + +%% Returns the binary at the front of the buffer without modifying the buffer. +-spec peek_head(Buffer :: prim_buffer()) -> binary(). +peek_head(_Buffer) -> + erlang:nif_error(undef). diff --git a/erts/preloaded/src/prim_file.erl b/erts/preloaded/src/prim_file.erl index ab5359ebbc..35042a7c72 100644 --- a/erts/preloaded/src/prim_file.erl +++ b/erts/preloaded/src/prim_file.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2000-2016. All Rights Reserved. +%% Copyright Ericsson AB 2000-2017. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. @@ -19,147 +19,45 @@ %% -module(prim_file). -%% Interface module to the file driver. +-export([on_load/0]). +-export([open/2, close/1, + sync/1, datasync/1, truncate/1, advise/4, allocate/3, + read_line/1, read/2, write/2, position/2, + pread/2, pread/3, pwrite/2, pwrite/3]). +%% OTP internal. +-export([ipread_s32bu_p32bu/3, sendfile/8, altname/1, get_handle/1]). -%%% Interface towards a single file's contents. Uses ?FD_DRV. +-export([read_file/1, write_file/2]). -%% Generic file contents operations --export([open/2, close/1, datasync/1, sync/1, advise/4, position/2, truncate/1, - write/2, pwrite/2, pwrite/3, read/2, read_line/1, pread/2, pread/3, - copy/3, sendfile/8, allocate/3]). +-export([read_link/1, read_link_all/1, + read_link_info/1, read_link_info/2, + read_file_info/1, read_file_info/2, + write_file_info/2, write_file_info/3]). -%% Specialized file operations --export([open/1, open/3]). --export([read_file/1, read_file/2, write_file/2]). --export([ipread_s32bu_p32bu/3]). +-export([list_dir/1, list_dir_all/1]). +-export([get_cwd/0, get_cwd/1, set_cwd/1, + delete/1, rename/2, + make_dir/1, del_dir/1, + make_link/2, make_symlink/2]). - -%%% Interface towards file system and metadata. Uses ?DRV. - -%% Takes an optional port (opens a ?DRV port per default) as first argument. --export([get_cwd/0, get_cwd/1, get_cwd/2, - set_cwd/1, set_cwd/2, - delete/1, delete/2, - rename/2, rename/3, - make_dir/1, make_dir/2, - del_dir/1, del_dir/2, - read_file_info/1, read_file_info/2, read_file_info/3, - altname/1, altname/2, - write_file_info/2, write_file_info/3, write_file_info/4, - make_link/2, make_link/3, - make_symlink/2, make_symlink/3, - read_link/1, read_link/2, read_link_all/1, read_link_all/2, - read_link_info/1, read_link_info/2, read_link_info/3, - list_dir/1, list_dir/2, list_dir_all/1, list_dir_all/2]). -%% How to start and stop the ?DRV port. --export([start/0, stop/1]). - -%% Debug exports --export([open_int/4, open_mode/1, open_mode/4]). - -%%%----------------------------------------------------------------- -%%% Includes and defines - --include("file.hrl"). - --define(DRV, "efile"). --define(FD_DRV, "efile"). - +-define(MIN_READLINE_SIZE, 256). -define(LARGEFILESIZE, (1 bsl 63)). -%% Driver commands --define(FILE_OPEN, 1). --define(FILE_READ, 2). --define(FILE_LSEEK, 3). --define(FILE_WRITE, 4). --define(FILE_FSTAT, 5). --define(FILE_PWD, 6). --define(FILE_READDIR, 7). --define(FILE_CHDIR, 8). --define(FILE_FSYNC, 9). --define(FILE_MKDIR, 10). --define(FILE_DELETE, 11). --define(FILE_RENAME, 12). --define(FILE_RMDIR, 13). --define(FILE_TRUNCATE, 14). --define(FILE_READ_FILE, 15). --define(FILE_WRITE_INFO, 16). --define(FILE_LSTAT, 19). --define(FILE_READLINK, 20). --define(FILE_LINK, 21). --define(FILE_SYMLINK, 22). --define(FILE_CLOSE, 23). --define(FILE_PWRITEV, 24). --define(FILE_PREADV, 25). --define(FILE_SETOPT, 26). --define(FILE_IPREAD, 27). --define(FILE_ALTNAME, 28). --define(FILE_READ_LINE, 29). --define(FILE_FDATASYNC, 30). --define(FILE_ADVISE, 31). --define(FILE_SENDFILE, 32). --define(FILE_ALLOCATE, 33). - -%% Driver responses --define(FILE_RESP_OK, 0). --define(FILE_RESP_ERROR, 1). --define(FILE_RESP_DATA, 2). --define(FILE_RESP_NUMBER, 3). --define(FILE_RESP_INFO, 4). --define(FILE_RESP_NUMERR, 5). --define(FILE_RESP_LDATA, 6). --define(FILE_RESP_N2DATA, 7). --define(FILE_RESP_EOF, 8). --define(FILE_RESP_FNAME, 9). --define(FILE_RESP_ALL_DATA, 10). --define(FILE_RESP_LFNAME, 11). - -%% Open modes for the driver's open function. --define(EFILE_MODE_READ, 1). --define(EFILE_MODE_WRITE, 2). --define(EFILE_MODE_READ_WRITE, 3). --define(EFILE_MODE_APPEND, 4). --define(EFILE_COMPRESSED, 8). --define(EFILE_MODE_EXCL, 16). -%% Note: bit 5 (32) is used internally for VxWorks --define(EFILE_MODE_SYNC, 64). - -%% Use this mask to get just the mode bits to be passed to the driver. --define(EFILE_MODE_MASK, 127). - -%% Seek modes for the driver's seek function. --define(EFILE_SEEK_SET, 0). --define(EFILE_SEEK_CUR, 1). --define(EFILE_SEEK_END, 2). - -%% Options --define(FILE_OPT_DELAYED_WRITE, 0). --define(FILE_OPT_READ_AHEAD, 1). - -%% IPREAD variants --define(IPREAD_S32BU_P32BU, 0). - -%% POSIX file advises --define(POSIX_FADV_NORMAL, 0). --define(POSIX_FADV_RANDOM, 1). --define(POSIX_FADV_SEQUENTIAL, 2). --define(POSIX_FADV_WILLNEED, 3). --define(POSIX_FADV_DONTNEED, 4). --define(POSIX_FADV_NOREUSE, 5). - -%% Sendfile flags --define(EFILE_SENDFILE_USE_THREADS, 1). +-export([copy/3]). +-include("file_int.hrl"). + +-type prim_file_ref() :: term(). %%% BIFs -export([internal_name2native/1, internal_native2name/1, internal_normalize_utf8/1, - is_translatable/1]). + is_translatable/1]). -type prim_file_name() :: string() | unicode:unicode_binary(). -type prim_file_name_error() :: 'error' | 'ignore' | 'warning'. @@ -185,1316 +83,733 @@ internal_normalize_utf8(_) -> is_translatable(_) -> erlang:nif_error(undefined). -%%% End of BIFs - -%%%----------------------------------------------------------------- -%%% Functions operating on a file through a handle. ?FD_DRV. -%%% -%%% Generic file contents operations. -%%% -%%% Supposed to be called by applications through module file. - - -%% Opens a file using the driver port Port. Returns {error, Reason} -%% | {ok, FileDescriptor} -open(Port, File, ModeList) when is_port(Port), - (is_list(File) orelse is_binary(File)), - is_list(ModeList) -> - case open_mode(ModeList) of - {Mode, _Portopts, _Setopts} -> - open_int(Port, File, Mode, []); - Reason -> - {error, Reason} - end; -open(_,_,_) -> - {error, badarg}. - -%% Opens a file. Returns {error, Reason} | {ok, FileDescriptor}. -open(File, ModeList) when (is_list(File) orelse is_binary(File)), - is_list(ModeList) -> - case open_mode(ModeList) of - {Mode, Portopts, Setopts} -> - open_int({?FD_DRV, Portopts},File, Mode, Setopts); - Reason -> - {error, Reason} - end; -open(_, _) -> - {error, badarg}. +%% -%% Opens a port that can be used for open/3 or read_file/2. -%% Returns {ok, Port} | {error, Reason}. -open(Portopts) when is_list(Portopts) -> - drv_open(?FD_DRV, [binary|Portopts]); -open(_) -> - {error, badarg}. +%% Returns {error, Reason} | {ok, BytesCopied} +copy(#file_descriptor{module = ?MODULE} = Source, + #file_descriptor{module = ?MODULE} = Dest, + Length) + when is_integer(Length), Length >= 0; + is_atom(Length) -> + %% XXX Should be moved down to the driver for optimization. + file:copy_opened(Source, Dest, Length). -open_int({Driver, Portopts}, File, Mode, Setopts) -> - case drv_open(Driver, Portopts) of - {ok, Port} -> - open_int(Port, File, Mode, Setopts); - {error, _} = Error -> - Error - end; -open_int(Port, File, Mode, Setopts) -> - M = Mode band ?EFILE_MODE_MASK, - case drv_command(Port, [<<?FILE_OPEN, M:32>>, pathname(File)]) of - {ok, Number} -> - open_int_setopts(Port, Number, Setopts); - Error -> - drv_close(Port), - Error - end. +on_load() -> + ok = erlang:load_nif(atom_to_list(?MODULE), 0). -open_int_setopts(Port, Number, []) -> - {ok, #file_descriptor{module = ?MODULE, data = {Port, Number}}}; -open_int_setopts(Port, Number, [Cmd | Tail]) -> - case drv_command(Port, Cmd) of - ok -> - open_int_setopts(Port, Number, Tail); - Error -> - drv_close(Port), - Error +open(Name, Modes) -> + %% The try/catch pattern seen here is used throughout the file to adhere to + %% the public file interface, which has leaked through for ages because of + %% "raw files." + try open_nif(encode_path(Name), Modes) of + {ok, Ref} -> {ok, make_fd(Ref, Modes)}; + {error, Reason} -> {error, Reason} + catch + error:badarg -> {error, badarg} end. +make_fd(FRef, Modes) -> + #file_descriptor{module = ?MODULE, data = build_fd_data(FRef, Modes) }. - -%% Returns ok. - -close(#file_descriptor{module = ?MODULE, data = {Port, _}}) -> - case drv_command(Port, <<?FILE_CLOSE>>) of - ok -> - drv_close(Port); - Error -> - Error - end; -%% Closes a port opened with open/1. -close(Port) when is_port(Port) -> - drv_close(Port). - --define(ADVISE(Offs, Len, Adv), - <<?FILE_ADVISE, Offs:64/signed, Len:64/signed, - Adv:32/signed>>). - -%% Returns {error, Reason} | ok. -advise(#file_descriptor{module = ?MODULE, data = {Port, _}}, - Offset, Length, Advise) -> - case Advise of - normal -> - Cmd = ?ADVISE(Offset, Length, ?POSIX_FADV_NORMAL), - drv_command(Port, Cmd); - random -> - Cmd = ?ADVISE(Offset, Length, ?POSIX_FADV_RANDOM), - drv_command(Port, Cmd); - sequential -> - Cmd = ?ADVISE(Offset, Length, ?POSIX_FADV_SEQUENTIAL), - drv_command(Port, Cmd); - will_need -> - Cmd = ?ADVISE(Offset, Length, ?POSIX_FADV_WILLNEED), - drv_command(Port, Cmd); - dont_need -> - Cmd = ?ADVISE(Offset, Length, ?POSIX_FADV_DONTNEED), - drv_command(Port, Cmd); - no_reuse -> - Cmd = ?ADVISE(Offset, Length, ?POSIX_FADV_NOREUSE), - drv_command(Port, Cmd); - _ -> - {error, einval} +close(Fd) -> + try + #{ handle := FRef } = get_fd_data(Fd), + close_nif(FRef) + catch + error:badarg -> {error, badarg} end. -%% Returns {error, Reason} | ok. -allocate(#file_descriptor{module = ?MODULE, data = {Port, _}}, Offset, Length) -> - Cmd = <<?FILE_ALLOCATE, Offset:64/signed, Length:64/signed>>, - drv_command(Port, Cmd). - -%% Returns {error, Reason} | ok. -write(#file_descriptor{module = ?MODULE, data = {Port, _}}, Bytes) -> - case drv_command_nt(Port, [?FILE_WRITE,erlang:dt_prepend_vm_tag_data(Bytes)],undefined) of - {ok, _Size} -> - ok; - Error -> - Error +read(Fd, Size) -> + try + #{ handle := FRef, + r_ahead_size := RASz, + r_buffer := RBuf } = get_fd_data(Fd), + read_1(FRef, RBuf, prim_buffer:size(RBuf), RASz, Size) + catch + error:badarg -> {error, badarg} end. -%% Returns ok | {error, {WrittenCount, Reason}} -pwrite(#file_descriptor{module = ?MODULE, data = {Port, _}}, L) - when is_list(L) -> - pwrite_int(Port, L, 0, [], []). - -pwrite_int(_, [], 0, [], []) -> - ok; -pwrite_int(Port, [], N, Spec, Data) -> - Header = list_to_binary([?FILE_PWRITEV, erlang:dt_prepend_vm_tag_data(<<N:32>>) | reverse(Spec)]), - case drv_command_nt(Port, [Header | reverse(Data)], undefined) of - {ok, _Size} -> - ok; - Error -> - Error - end; -pwrite_int(Port, [{Offs, Bytes} | T], N, Spec, Data) - when is_integer(Offs) -> - if - -(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE -> - pwrite_int(Port, T, N, Spec, Data, Offs, Bytes); - true -> - {error, einval} +-spec read_1(FRef, RBuf, RBufSz, RASz, RSz) -> Result when + FRef :: prim_file_ref(), + RBuf :: term(), + RBufSz :: non_neg_integer(), + RASz :: non_neg_integer(), + RSz :: non_neg_integer(), + Result :: eof | {ok, binary()} | {error, Reason :: atom()}. +read_1(_FRef, RBuf, RBufSz, _RASz, RSz) when RBufSz >= RSz -> + {ok, prim_buffer:read(RBuf, RSz)}; +read_1(FRef, RBuf, RBufSz, RASz, RSz) when RBufSz > 0 -> + Buffered = prim_buffer:read(RBuf, RBufSz), + case read_1(FRef, RBuf, 0, RASz, RSz - RBufSz) of + {ok, Data} -> + {ok, <<Buffered/binary, Data/binary>>}; + eof -> + {ok, Buffered}; + {error, Reason} -> + {error, Reason} end; -pwrite_int(_, [_|_], _N, _Spec, _Data) -> - {error, badarg}. +read_1(FRef, RBuf, RBufSz, RASz, RSz) when RBufSz =:= 0 -> + case read_nif(FRef, RASz + RSz) of + {ok, Data} when byte_size(Data) > RSz -> + {First, Rest} = split_binary(Data, RSz), + prim_buffer:write(RBuf, [Rest]), + {ok, First}; + {ok, Data} when byte_size(Data) =< RSz -> + {ok, Data}; + eof -> + eof; + {error, Reason} -> + {error, Reason} + end. -pwrite_int(Port, T, N, Spec, Data, Offs, Bin) - when is_binary(Bin) -> - Size = byte_size(Bin), - pwrite_int(Port, T, N+1, - [<<Offs:64/signed, Size:64>> | Spec], - [Bin | Data]); -pwrite_int(Port, T, N, Spec, Data, Offs, Bytes) -> - try list_to_binary(Bytes) of - Bin -> - pwrite_int(Port, T, N, Spec, Data, Offs, Bin) +read_line(Fd) -> + try + #{ handle := FRef, + r_ahead_size := RASz, + r_buffer := RBuf } = get_fd_data(Fd), + SearchResult = prim_buffer:find_byte_index(RBuf, $\n), + LineSize = max(?MIN_READLINE_SIZE, RASz), + read_line_1(FRef, RBuf, SearchResult, LineSize) catch - error:Reason -> - {error, Reason} + error:badarg -> {error, badarg} end. - - -%% Returns {error, Reason} | ok. -pwrite(#file_descriptor{module = ?MODULE, data = {Port, _}}, Offs, Bytes) - when is_integer(Offs) -> - if - -(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE -> - case pwrite_int(Port, [], 0, [], [], Offs, Bytes) of - {error, {_, Reason}} -> - {error, Reason}; - Result -> - Result - end; - true -> - {error, einval} +-spec read_line_1(FRef, RBuf, SearchResult, LineSize) -> Result when + FRef :: prim_file_ref(), + RBuf :: term(), + SearchResult :: not_found | {ok, non_neg_integer()}, + LineSize :: non_neg_integer(), + Result :: eof | {ok, binary()} | {error, Reason :: atom()}. +read_line_1(FRef, RBuf, not_found, LineSize) -> + case read_nif(FRef, LineSize) of + {ok, Data} -> + prim_buffer:write(RBuf, [Data]), + SearchResult = prim_buffer:find_byte_index(RBuf, $\n), + read_line_1(FRef, RBuf, SearchResult, LineSize); + eof -> + case prim_buffer:size(RBuf) of + Size when Size > 0 -> {ok, prim_buffer:read(RBuf, Size)}; + Size when Size =:= 0 -> eof + end; + {error, Reason} -> + {error, Reason} end; -pwrite(#file_descriptor{module = ?MODULE}, _, _) -> - {error, badarg}. - +read_line_1(_FRef, RBuf, {ok, LFIndex}, _LineSize) -> + %% Translate CRLF into just LF, completely ignoring which encoding is used. + CRIndex = (LFIndex - 1), + case prim_buffer:read(RBuf, LFIndex + 1) of + <<Line:CRIndex/binary, "\r\n">> -> {ok, <<Line/binary, "\n">>}; + Line -> {ok, Line} + end. -%% Returns {error, Reason} | ok. -datasync(#file_descriptor{module = ?MODULE, data = {Port, _}}) -> - drv_command(Port, [?FILE_FDATASYNC]). - -%% Returns {error, Reason} | ok. -sync(#file_descriptor{module = ?MODULE, data = {Port, _}}) -> - drv_command(Port, [?FILE_FSYNC]). - -%% Returns {ok, Data} | eof | {error, Reason}. -read_line(#file_descriptor{module = ?MODULE, data = {Port, _}}) -> - case drv_command(Port, <<?FILE_READ_LINE>>) of - {ok, {0, _Data}} -> - eof; - {ok, {_Size, Data}} -> - {ok, Data}; - {error, enomem} -> - erlang:garbage_collect(), - case drv_command(Port, <<?FILE_READ_LINE>>) of - {ok, {0, _Data}} -> - eof; - {ok, {_Size, Data}} -> - {ok, Data}; - Other -> - Other - end; - Error -> - Error +write(Fd, IOData) -> + try + #{ handle := FRef } = get_fd_data(Fd), + reset_write_position(Fd), + write_1(FRef, erlang:iolist_to_iovec(IOData)) + catch + error:badarg -> {error, badarg} end. - -%% Returns {ok, Data} | eof | {error, Reason}. -read(#file_descriptor{module = ?MODULE, data = {Port, _}}, Size) - when is_integer(Size), 0 =< Size -> - if - Size < ?LARGEFILESIZE -> - case drv_command(Port, <<?FILE_READ, Size:64>>) of - {ok, {0, _Data}} when Size =/= 0 -> - eof; - {ok, {_Size, Data}} -> - {ok, Data}; - {error, enomem} -> - %% Garbage collecting here might help if - %% the current processes have some old binaries left. - erlang:garbage_collect(), - case drv_command(Port, <<?FILE_READ, Size:64>>) of - {ok, {0, _Data}} when Size =/= 0 -> - eof; - {ok, {_Size, Data}} -> - {ok, Data}; - Other -> - Other - end; - Error -> - Error - end; - true -> - {error, einval} +write_1(FRef, IOVec) -> + case write_nif(FRef, IOVec) of + {continue, Remainder} -> + write_1(FRef, Remainder); + ok -> + ok; + {error, Reason} -> + {error, Reason} end. -%% Returns {ok, [Data|eof, ...]} | {error, Reason} -pread(#file_descriptor{module = ?MODULE, data = {Port, _}}, L) - when is_list(L) -> - pread_int(Port, L, 0, []). - -pread_int(_, [], 0, []) -> - {ok, []}; -pread_int(Port, [], N, Spec) -> - drv_command_nt(Port, [?FILE_PREADV, erlang:dt_prepend_vm_tag_data(<<0:32, N:32>>) | reverse(Spec)],undefined); -pread_int(Port, [{Offs, Size} | T], N, Spec) - when is_integer(Offs), is_integer(Size), 0 =< Size -> - if - -(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE, - Size < ?LARGEFILESIZE -> - pread_int(Port, T, N+1, [<<Offs:64/signed, Size:64>> | Spec]); - true -> - {error, einval} - end; -pread_int(_, [_|_], _N, _Spec) -> - {error, badarg}. - - - -%% Returns {ok, Data} | eof | {error, Reason}. -pread(#file_descriptor{module = ?MODULE, data = {Port, _}}, Offs, Size) - when is_integer(Offs), is_integer(Size), 0 =< Size -> - if - -(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE, - Size < ?LARGEFILESIZE -> - case drv_command_nt(Port, - [?FILE_PREADV, erlang:dt_prepend_vm_tag_data(<<0:32, 1:32, - Offs:64/signed, Size:64>>)], undefined) of - {ok, [eof]} -> - eof; - {ok, [Data]} -> - {ok, Data}; - Error -> - Error - end; - true -> - {error, einval} - end; -pread(#file_descriptor{module = ?MODULE, data = {_, _}}, _, _) -> - {error, badarg}. - - - -%% Returns {ok, Position} | {error, Reason}. -position(#file_descriptor{module = ?MODULE, data = {Port, _}}, At) -> - case lseek_position(At) of - {Offs, Whence} - when -(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE -> - drv_command(Port, <<?FILE_LSEEK, Offs:64/signed, Whence:32>>); - {_, _} -> - {error, einval}; - Reason -> - {error, Reason} +truncate(Fd) -> + try + #{ handle := FRef } = get_fd_data(Fd), + reset_write_position(Fd), + truncate_nif(FRef) + catch + error:badarg -> {error, badarg} end. -%% Returns {error, Reason} | ok. -truncate(#file_descriptor{module = ?MODULE, data = {Port, _}}) -> - drv_command(Port, <<?FILE_TRUNCATE>>). - - - -%% Returns {error, Reason} | {ok, BytesCopied} -copy(#file_descriptor{module = ?MODULE} = Source, - #file_descriptor{module = ?MODULE} = Dest, - Length) - when is_integer(Length), Length >= 0; - is_atom(Length) -> - %% XXX Should be moved down to the driver for optimization. - file:copy_opened(Source, Dest, Length). - - - -ipread_s32bu_p32bu(#file_descriptor{module = ?MODULE, - data = {_, _}} = Handle, - Offs, - Infinity) when is_atom(Infinity) -> - ipread_s32bu_p32bu(Handle, Offs, (1 bsl 31)-1); -ipread_s32bu_p32bu(#file_descriptor{module = ?MODULE, data = {Port, _}}, - Offs, - MaxSize) - when is_integer(Offs), is_integer(MaxSize) -> - if - -(?LARGEFILESIZE) =< Offs, Offs < ?LARGEFILESIZE, - 0 =< MaxSize, MaxSize < (1 bsl 31) -> - drv_command(Port, <<?FILE_IPREAD, ?IPREAD_S32BU_P32BU, - Offs:64, MaxSize:32>>); - true -> - {error, einval} - end; -ipread_s32bu_p32bu(#file_descriptor{module = ?MODULE, data = {_, _}}, - _Offs, - _MaxSize) -> - {error, badarg}. +advise(Fd, Offset, Length, Advise) -> + try + #{ handle := FRef } = get_fd_data(Fd), + advise_nif(FRef, Offset, Length, Advise) + catch + error:badarg -> {error, badarg} + end. +allocate(Fd, Offset, Length) -> + try + #{ handle := FRef } = get_fd_data(Fd), + allocate_nif(FRef, Offset, Length) + catch + error:badarg -> {error, badarg} + end. +sync(Fd) -> + try + #{ handle := FRef } = get_fd_data(Fd), + sync_nif(FRef, 0) + catch + error:badarg -> {error, badarg} + end. -%% Returns {ok, Contents} | {error, Reason} -read_file(File) when (is_list(File) orelse is_binary(File)) -> - case drv_open(?FD_DRV, [binary]) of - {ok, Port} -> - Result = read_file(Port, File), - close(Port), - Result; - {error, _} = Error -> - Error - end; -read_file(_) -> - {error, badarg}. +datasync(Fd) -> + try + #{ handle := FRef } = get_fd_data(Fd), + sync_nif(FRef, 1) + catch + error:badarg -> {error, badarg} + end. -%% Takes a Port opened with open/1. -read_file(Port, File) when is_port(Port), - (is_list(File) orelse is_binary(File)) -> - Cmd = [?FILE_READ_FILE | pathname(File)], - case drv_command(Port, Cmd) of - {error, enomem} -> - %% It could possibly help to do a - %% garbage collection here, - %% if the file server has some references - %% to binaries read earlier. - erlang:garbage_collect(), - drv_command(Port, Cmd); - Result -> - Result +position(Fd, {cur, Offset}) -> + try + %% Adjust our current position according to how much we've read ahead. + #{ r_buffer := RBuf } = get_fd_data(Fd), + position_1(Fd, cur, Offset - prim_buffer:size(RBuf)) + catch + error:badarg -> {error, badarg} end; -read_file(_,_) -> - {error, badarg}. - - - -%% Returns {error, Reason} | ok. -write_file(File, Bin) when (is_list(File) orelse is_binary(File)) -> - case open(File, [binary, write]) of - {ok, Handle} -> - Result = write(Handle, Bin), - close(Handle), - Result; - Error -> - Error +position(Fd, {Mark, Offset}) -> + try + position_1(Fd, Mark, Offset) + catch + error:badarg -> {error, badarg} end; -write_file(_, _) -> - {error, badarg}. +position(Fd, cur) -> position(Fd, {cur, 0}); +position(Fd, bof) -> position(Fd, {bof, 0}); +position(Fd, eof) -> position(Fd, {eof, 0}); +position(Fd, Offset) -> position(Fd, {bof, Offset}). +position_1(Fd, Mark, Offset) -> + #{ handle := FRef, r_buffer := RBuf } = get_fd_data(Fd), + prim_buffer:wipe(RBuf), + seek_nif(FRef, Mark, Offset). -%% Returns {error, Reason} | {ok, BytesCopied} -%sendfile(_,_,_,_,_,_,_,_,_,_) -> -% {error, enotsup}; -sendfile(#file_descriptor{module = ?MODULE, data = {Port, _}}, - Dest, Offset, Bytes, _ChunkSize, Headers, Trailers, - Flags) -> - case erlang:port_get_data(Dest) of - Data when Data == inet_tcp; Data == inet6_tcp -> - ok = inet:lock_socket(Dest,true), - {ok, DestFD} = prim_inet:getfd(Dest), - IntFlags = translate_sendfile_flags(Flags), - try drv_command(Port, [<<?FILE_SENDFILE, DestFD:32, - IntFlags:8, - Offset:64/unsigned, - Bytes:64/unsigned, - (iolist_size(Headers)):32/unsigned, - (iolist_size(Trailers)):32/unsigned>>, - Headers,Trailers]) - after - ok = inet:lock_socket(Dest,false) - end; - _Else -> - {error,badarg} +pread(Fd, Offset, Size) -> + try + #{ handle := FRef } = get_fd_data(Fd), + pread_nif(FRef, Offset, Size) + catch + error:badarg -> {error, badarg} end. -translate_sendfile_flags([{use_threads,true}|T]) -> - ?EFILE_SENDFILE_USE_THREADS bor translate_sendfile_flags(T); -translate_sendfile_flags([_|T]) -> - translate_sendfile_flags(T); -translate_sendfile_flags([]) -> - 0. - - -%%%----------------------------------------------------------------- -%%% Functions operating on files without handle to the file. ?DRV. -%%% -%%% Supposed to be called by applications through module file. - - - -%% Returns {ok, Port}, the Port should be used as first argument in all -%% the following functions. Returns {error, Reason} upon failure. -start() -> - drv_open(?DRV, [binary]). - -stop(Port) when is_port(Port) -> - try erlang:port_close(Port) of - _ -> - ok +pread(Fd, LocNums) -> + try + #{ handle := FRef } = get_fd_data(Fd), + pread_list(FRef, LocNums, []) catch - _:_ -> - ok + error:badarg -> {error, badarg} end. +-spec pread_list(FRef, LocNums, ResultList) -> Result when + FRef :: prim_file_ref(), + LocNums :: list({Offset :: non_neg_integer(), + Size :: non_neg_integer()}), + ResultList :: list(eof | binary()), + Result :: {ok, ResultList} | {error, Reason :: atom()}. +pread_list(_FRef, [], ResultList) -> + {ok, reverse_list(ResultList)}; +pread_list(FRef, [{Offset, Size} | Rest], ResultList) -> + case pread_nif(FRef, Offset, Size) of + {ok, Data} -> + pread_list(FRef, Rest, [Data | ResultList]); + eof -> + pread_list(FRef, Rest, [eof | ResultList]); + {error, Reason} -> + {error, Reason} + end. +pwrite(Fd, Offset, IOData) -> + try + #{ handle := FRef, r_buffer := RBuf } = get_fd_data(Fd), + prim_buffer:wipe(RBuf), + pwrite_plain(FRef, Offset, erlang:iolist_to_iovec(IOData)) + catch + error:badarg -> {error, badarg} + end. +pwrite_plain(FRef, Offset, IOVec) -> + case pwrite_nif(FRef, Offset, IOVec) of + {continue, BytesWritten, Remainder} -> + pwrite_plain(FRef, Offset + BytesWritten, Remainder); + ok -> + ok; + {error, Reason} -> + {error, Reason} + end. -%%% The following functions take an optional Port as first argument. -%%% If the port is not supplied, a temporary one is opened and then -%%% closed after the request has been performed. - - - -%% get_cwd/{0,1,2} - -get_cwd() -> - get_cwd_int(0). - -get_cwd(Port) when is_port(Port) -> - get_cwd_int(Port, 0); -get_cwd([]) -> - get_cwd_int(0); -get_cwd([Letter, $: | _]) when $a =< Letter, Letter =< $z -> - get_cwd_int(Letter - $a + 1); -get_cwd([Letter, $: | _]) when $A =< Letter, Letter =< $Z -> - get_cwd_int(Letter - $A + 1); -get_cwd([_|_]) -> - {error, einval}; -get_cwd(_) -> - {error, badarg}. - -get_cwd(Port, []) when is_port(Port) -> - get_cwd_int(Port, 0); -get_cwd(Port, [Letter, $: | _]) - when is_port(Port), $a =< Letter, Letter =< $z -> - get_cwd_int(Port, Letter - $a + 1); -get_cwd(Port, [Letter, $: | _]) - when is_port(Port), $A =< Letter, Letter =< $Z -> - get_cwd_int(Port, Letter - $A + 1); -get_cwd(Port, [_|_]) when is_port(Port) -> - {error, einval}; -get_cwd(_, _) -> - {error, badarg}. - -get_cwd_int(Drive) -> - get_cwd_int({?DRV, [binary]}, Drive). - -get_cwd_int(Port, Drive) -> - drv_command(Port, <<?FILE_PWD, Drive>>, - fun handle_fname_response/1). - - - -%% set_cwd/{1,2} +pwrite(Fd, LocBytes) -> + try + #{ handle := FRef, r_buffer := RBuf } = get_fd_data(Fd), + prim_buffer:wipe(RBuf), + pwrite_list(FRef, LocBytes, 0) + catch + error:badarg -> {error, badarg} + end. -set_cwd(Dir) -> - set_cwd_int({?DRV, [binary]}, Dir). +-spec pwrite_list(FRef, LocBytes, Successes) -> Result when + FRef :: prim_file_ref(), + LocBytes :: list({Offset :: non_neg_integer(), + IOData :: iodata()}), + Successes :: non_neg_integer(), + Result :: ok | {error, {Successes, Reason :: atom()}}. +pwrite_list(_FRef, [], _Successes) -> + ok; +pwrite_list(FRef, [{Offset, IOData} | Rest], Successes) -> + case pwrite_plain(FRef, Offset, erlang:iolist_to_iovec(IOData)) of + {error, Reason} -> {error, {Successes, Reason}}; + ok -> pwrite_list(FRef, Rest, Successes + 1) + end. -set_cwd(Port, Dir) when is_port(Port) -> - set_cwd_int(Port, Dir). +sendfile(Fd, Socket, Offset, Bytes, _ChunkSize, [], [], _Flags) -> + %% There's a very nasty race in here; if we die just prior to duplicating + %% the handle down in the sendfile call, it might get reused by something + %% entirely different and we'll leak unknown data to the socket until it + %% dies soon after. + %% + %% This bug was inherited from the old driver, except it was vulnerable to + %% the bug at any point and not just during setup. + %% + %% We'll have to live with this until we have a way to unambiguously + %% transfer things between drivers or NIFs. Current ideas all fall afoul + %% of the Two Generals problem. + try + advise(Fd, Offset, Bytes, sequential), + prim_inet:sendfile(Socket, get_handle(Fd), Offset, Bytes) + catch + error:badarg -> {error, badarg} + end; +sendfile(_Fd, _Socket, _Offset, _Bytes, _ChunkSize, _Headers, _Trailers, _Flags) -> + {error, enotsup}. -set_cwd_int(Port, Dir) when is_binary(Dir) -> - case prim_file:is_translatable(Dir) of - false -> - {error, no_translation}; - true -> - drv_command(Port, [?FILE_CHDIR, pathname(Dir)]) +%% Undocumented internal function that reads a data block with indirection. +%% +%% This is only used once in DETS and can easily be emulated with pread/2, but +%% it's pretty performance-sensitive so we've implemented it down in the NIF to +%% avoid excessive rescheduling. +-spec ipread_s32bu_p32bu(Fd, Offset, MaxSize) -> Result when + Fd :: #file_descriptor{}, + Offset :: non_neg_integer(), + MaxSize :: non_neg_integer() | infinity, + Result :: {ok, Size :: non_neg_integer(), + Pointer :: non_neg_integer(), + Data :: iodata() | eof} | + eof | + {error, Reason :: atom()}. +ipread_s32bu_p32bu(Fd, Offset, Infinity) when is_atom(Infinity) -> + ipread_s32bu_p32bu(Fd, Offset, (1 bsl 31) - 1); +ipread_s32bu_p32bu(Fd, Offset, MaxSize) + when is_integer(Offset), is_integer(MaxSize) -> + try + #{ handle := FRef } = get_fd_data(Fd), + ipread_s32bu_p32bu_nif(FRef, Offset, MaxSize) + catch + error:badarg -> {error, badarg} end; -set_cwd_int(Port, Dir) when is_list(Dir) -> - drv_command(Port, [?FILE_CHDIR, pathname(Dir)]); -set_cwd_int(_, _) -> +ipread_s32bu_p32bu(_Fd, _Offset, _MaxSize) -> {error, badarg}. - - - -%% delete/{1,2} - -delete(File) -> - delete_int({?DRV, [binary]}, File). - -delete(Port, File) when is_port(Port) -> - delete_int(Port, File). - -delete_int(Port, File) -> - drv_command(Port, [?FILE_DELETE, pathname(File)]). - - - -%% rename/{2,3} - -rename(From, To) -> - rename_int({?DRV, [binary]}, From, To). - -rename(Port, From, To) when is_port(Port) -> - rename_int(Port, From, To). - -rename_int(Port, From, To) -> - drv_command(Port, [?FILE_RENAME, pathname(From), pathname(To)]). - - - -%% make_dir/{1,2} - -make_dir(Dir) -> - make_dir_int({?DRV, [binary]}, Dir). - -make_dir(Port, Dir) when is_port(Port) -> - make_dir_int(Port, Dir). - -make_dir_int(Port, Dir) -> - drv_command(Port, [?FILE_MKDIR, pathname(Dir)]). - - - -%% del_dir/{1,2} - -del_dir(Dir) -> - del_dir_int({?DRV, [binary]}, Dir). - -del_dir(Port, Dir) when is_port(Port) -> - del_dir_int(Port, Dir). - -del_dir_int(Port, Dir) -> - drv_command(Port, [?FILE_RMDIR, pathname(Dir)]). - - - -%% read_file_info/{1,2,3} - -read_file_info(File) -> - read_file_info_int({?DRV, [binary]}, File, local). - -read_file_info(Port, File) when is_port(Port) -> - read_file_info_int(Port, File, local); -read_file_info(File, Opts) -> - read_file_info_int({?DRV, [binary]}, File, plgv(time, Opts, local)). - -read_file_info(Port, File, Opts) when is_port(Port) -> - read_file_info_int(Port, File, plgv(time, Opts, local)). - -read_file_info_int(Port, File, TimeType) -> +ipread_s32bu_p32bu_nif(_FRef, _Offset, _MaxSize) -> + erlang:nif_error(undef). + +%% Returns the binary representation of the underlying handle, for use in +%% tricky operations like sendfile/8. +-spec get_handle(Fd) -> Result when + Fd :: #file_descriptor{}, + Result :: binary() | {error, Reason :: atom()}. +get_handle(Fd) -> try - case drv_command(Port, [?FILE_FSTAT, pathname(File)]) of - {ok, FI} -> {ok, FI#file_info{ - ctime = from_seconds(FI#file_info.ctime, TimeType), - mtime = from_seconds(FI#file_info.mtime, TimeType), - atime = from_seconds(FI#file_info.atime, TimeType) - }}; - Error -> Error - end + #{ handle := FRef } = get_fd_data(Fd), + get_handle_nif(FRef) catch - error:_ -> {error, badarg} + error:badarg -> {error, badarg} end. +%% Resets the write head to the position the user believes we're at, which may +%% not be the same as the real one when read caching is in effect. +reset_write_position(Fd) -> + #{ r_buffer := RBuf } = Fd#file_descriptor.data, + case prim_buffer:size(RBuf) of + Size when Size > 0 -> position(Fd, cur); + Size when Size =:= 0 -> ok + end. -%% altname/{1,2} - -altname(File) -> - altname_int({?DRV, [binary]}, File). - -altname(Port, File) when is_port(Port) -> - altname_int(Port, File). - -altname_int(Port, File) -> - drv_command(Port, [?FILE_ALTNAME, pathname(File)], - fun handle_fname_response/1). - -%% write_file_info/{2,3,4} - -write_file_info(File, Info) -> - write_file_info_int({?DRV, [binary]}, File, Info, local). - -write_file_info(Port, File, Info) when is_port(Port) -> - write_file_info_int(Port, File, Info, local); -write_file_info(File, Info, Opts) -> - write_file_info_int({?DRV, [binary]}, File, Info, plgv(time, Opts, local)). - -write_file_info(Port, File, Info, Opts) when is_port(Port) -> - write_file_info_int(Port, File, Info, plgv(time, Opts, local)). +get_fd_data(#file_descriptor{ data = Data }) -> + #{ owner := Owner } = Data, + case self() of + Owner -> Data; + _ -> error(not_on_controlling_process) + end. -write_file_info_int(Port, File, - #file_info{mode=Mode, - uid=Uid, - gid=Gid, - atime=Atime0, - mtime=Mtime0, - ctime=Ctime0}, - TimeType) -> +build_fd_data(FRef, Modes) -> + Defaults = + #{ owner => self(), + handle => FRef, + r_ahead_size => 0, + r_buffer => prim_buffer:new() }, + fill_fd_option_map(Modes, Defaults). + +fill_fd_option_map([], Map) -> + Map; + +fill_fd_option_map([read_ahead | Modes], Map) -> + fill_fd_option_map([{read_ahead, 64 bsl 10} | Modes], Map); +fill_fd_option_map([{read_ahead, Size} | Modes], Map) -> + fill_fd_option_map(Modes, Map#{ r_ahead_size => Size }); + +fill_fd_option_map([_Ignored | Modes], Map) -> + fill_fd_option_map(Modes, Map). + +open_nif(_Name, _Modes) -> + erlang:nif_error(undef). +close_nif(_FileRef) -> + erlang:nif_error(undef). +read_nif(_FileRef, _Size) -> + erlang:nif_error(undef). +write_nif(_FileRef, _IOVec) -> + erlang:nif_error(undef). +pread_nif(_FileRef, _Offset, _Size) -> + erlang:nif_error(undef). +pwrite_nif(_FileRef, _Offset, _IOVec) -> + erlang:nif_error(undef). +seek_nif(_FileRef, _Mark, _Offset) -> + erlang:nif_error(undef). +sync_nif(_FileRef, _DataOnly) -> + erlang:nif_error(undef). +advise_nif(_FileRef, _Offset, _Length, _Advise) -> + erlang:nif_error(undef). +allocate_nif(_FileRef, _Offset, _Length) -> + erlang:nif_error(undef). +truncate_nif(_FileRef) -> + erlang:nif_error(undef). +get_handle_nif(_FileRef) -> + erlang:nif_error(undef). - % Atime and/or Mtime might be undefined - % - use localtime() for atime, if atime is undefined - % - use atime as mtime if mtime is undefined - % - use mtime as ctime if ctime is undefined +%% +%% Quality-of-life helpers +%% +read_file(Filename) -> + %% We're doing this operation in the NIF to avoid excessive rescheduling. try - Atime = file_info_validate_atime(Atime0, TimeType), - Mtime = file_info_validate_mtime(Mtime0, Atime), - Ctime = file_info_validate_ctime(Ctime0, Mtime), - - drv_command(Port, [?FILE_WRITE_INFO, - int_to_int32bytes(Mode), - int_to_int32bytes(Uid), - int_to_int32bytes(Gid), - int_to_int64bytes(to_seconds(Atime, TimeType)), - int_to_int64bytes(to_seconds(Mtime, TimeType)), - int_to_int64bytes(to_seconds(Ctime, TimeType)), - pathname(File)]) + read_file_nif(encode_path(Filename)) catch - error:_ -> {error, badarg} + error:badarg -> {error, badarg} + end. +read_file_nif(_Filename) -> + erlang:nif_error(undef). + +write_file(Filename, Bytes) -> + write_file(Filename, Bytes, []). +write_file(Filename, Bytes, Modes) -> + case open(Filename, [write, binary | Modes]) of + {ok, Fd} -> + Result = write(Fd, Bytes), + close(Fd), + Result; + {error, Reason} -> + {error, Reason} end. +%% +%% Filesystem operations +%% -file_info_validate_atime(Atime, _) when Atime =/= undefined -> Atime; -file_info_validate_atime(undefined, local) -> erlang:localtime(); -file_info_validate_atime(undefined, universal) -> erlang:universaltime(); -file_info_validate_atime(undefined, posix) -> erlang:universaltime_to_posixtime(erlang:universaltime()). - -file_info_validate_mtime(undefined, Atime) -> Atime; -file_info_validate_mtime(Mtime, _) -> Mtime. - -file_info_validate_ctime(undefined, Mtime) -> Mtime; -file_info_validate_ctime(Ctime, _) -> Ctime. - -%% make_link/{2,3} - -make_link(Old, New) -> - make_link_int({?DRV, [binary]}, Old, New). - -make_link(Port, Old, New) when is_port(Port) -> - make_link_int(Port, Old, New). - -make_link_int(Port, Old, New) -> - drv_command(Port, [?FILE_LINK, pathname(Old), pathname(New)]). - - - -%% make_symlink/{2,3} - -make_symlink(Old, New) -> - make_symlink_int({?DRV, [binary]}, Old, New). - -make_symlink(Port, Old, New) when is_port(Port) -> - make_symlink_int(Port, Old, New). - -make_symlink_int(Port, Old, New) -> - drv_command(Port, [?FILE_SYMLINK, pathname(Old), pathname(New)]). - - - -%% read_link/{2,3} - -read_link(Link) -> - read_link_int({?DRV, [binary]}, Link). - -read_link(Port, Link) when is_port(Port) -> - read_link_int(Port, Link). - -read_link_int(Port, Link) -> - drv_command(Port, [?FILE_READLINK, pathname(Link)], - fun handle_fname_response/1). - -%% read_link_all/{2,3} - -read_link_all(Link) -> - read_link_all_int({?DRV, [binary]}, Link). - -read_link_all(Port, Link) when is_port(Port) -> - read_link_all_int(Port, Link). - -read_link_all_int(Port, Link) -> - drv_command(Port, [?FILE_READLINK, pathname(Link)], - fun handle_fname_response_all/1). - - - -%% read_link_info/{2,3} - -read_link_info(Link) -> - read_link_info_int({?DRV, [binary]}, Link, local). - -read_link_info(Port, Link) when is_port(Port) -> - read_link_info_int(Port, Link, local); +read_link(Name) -> read_link_1(Name, false). +read_link_all(Name) -> read_link_1(Name, true). -read_link_info(Link, Opts) -> - read_link_info_int({?DRV, [binary]}, Link, plgv(time, Opts, local)). +read_link_1(Name, AcceptRawNames) -> + try read_link_nif(encode_path(Name)) of + {ok, RawName} -> translate_raw_name(RawName, AcceptRawNames); + {error, Reason} -> {error, Reason} + catch + error:badarg -> {error, badarg} + end. -read_link_info(Port, Link, Opts) when is_port(Port) -> - read_link_info_int(Port, Link, plgv(time, Opts, local)). +translate_raw_name(RawName, SilentFailure) -> + case decode_path(RawName) of + Converted when is_list(Converted) -> {ok, Converted}; + {error, _Reason} when SilentFailure =:= false -> {error, einval}; + {error, _Reason} when SilentFailure =:= true -> {ok, RawName} + end. +list_dir(Name) -> list_dir_1(Name, true). +list_dir_all(Name) -> list_dir_1(Name, false). -read_link_info_int(Port, Link, TimeType) -> - try - case drv_command(Port, [?FILE_LSTAT, pathname(Link)]) of - {ok, FI} -> {ok, FI#file_info{ - ctime = from_seconds(FI#file_info.ctime, TimeType), - mtime = from_seconds(FI#file_info.mtime, TimeType), - atime = from_seconds(FI#file_info.atime, TimeType) - }}; - Error -> Error - end +list_dir_1(Name, SkipInvalid) -> + try list_dir_nif(encode_path(Name)) of + {ok, RawNames} -> list_dir_convert(RawNames, SkipInvalid, []); + {error, Reason} -> {error, Reason} catch - error:_ -> {error, badarg} + error:badarg -> {error, badarg} end. -%% list_dir/{1,2} - -list_dir(Dir) -> - list_dir_int({?DRV, [binary]}, Dir). - -list_dir(Port, Dir) when is_port(Port) -> - list_dir_int(Port, Dir). - -list_dir_int(Port, Dir) -> - drv_command(Port, [?FILE_READDIR, pathname(Dir)], - fun(P) -> - case list_dir_response(P, []) of - {ok, RawNames} -> - try - {ok, list_dir_convert(RawNames)} - catch - throw:Reason -> - Reason - end; - Error -> - Error - end - end). - -list_dir_all(Dir) -> - list_dir_all_int({?DRV, [binary]}, Dir). - -list_dir_all(Port, Dir) when is_port(Port) -> - list_dir_all_int(Port, Dir). - -list_dir_all_int(Port, Dir) -> - drv_command(Port, [?FILE_READDIR, pathname(Dir)], - fun(P) -> - case list_dir_response(P, []) of - {ok, RawNames} -> - {ok, list_dir_convert_all(RawNames)}; - Error -> - Error - end - end). - -list_dir_response(Port, Acc0) -> - case drv_get_response(Port) of - {lfname, []} -> - {ok, Acc0}; - {lfname, Names} -> - Acc = [Name || <<L:16,Name:L/binary>> <= Names] ++ Acc0, - list_dir_response(Port, Acc); - Error -> - Error +list_dir_convert([], _SkipInvalid, Result) -> + {ok, Result}; +list_dir_convert([RawName | Rest], SkipInvalid, Result) -> + case decode_path(RawName) of + Converted when is_list(Converted) -> + list_dir_convert(Rest, SkipInvalid, [Converted | Result]); + {error, _} when SkipInvalid =:= false -> + list_dir_convert(Rest, SkipInvalid, [RawName | Result]); + + %% If the filename cannot be converted, return error or ignore with + %% optional error logger warning depending on +fn{u|a}{i|e|w} emulator + %% switches. + {error, ignore} -> + list_dir_convert(Rest, SkipInvalid, Result); + {error, warning} -> + error_logger:warning_msg( + "Non-unicode filename ~p ignored\n", [RawName]), + list_dir_convert(Rest, SkipInvalid, Result); + {error, _} -> + {error, {no_translation, RawName}} end. -list_dir_convert([Name|Names]) -> - %% If the filename cannot be converted, return error or ignore - %% with optional error logger warning, depending on +fn{u|a}{i|e|w} - %% emulator switches. - case prim_file:internal_native2name(Name) of - {error, warning} -> - error_logger:warning_msg("Non-unicode filename ~p ignored\n", - [Name]), - list_dir_convert(Names); - {error, ignore} -> - list_dir_convert(Names); - {error, error} -> - throw({error, {no_translation, Name}}); - Converted when is_list(Converted) -> - [Converted|list_dir_convert(Names)] - end; -list_dir_convert([]) -> []. - -list_dir_convert_all([Name|Names]) -> - %% If the filename cannot be converted, retain the filename as - %% a binary. - case prim_file:internal_native2name(Name) of - {error, _} -> - [Name|list_dir_convert_all(Names)]; - Converted when is_list(Converted) -> - [Converted|list_dir_convert_all(Names)] - end; -list_dir_convert_all([]) -> []. - -%%%----------------------------------------------------------------- -%%% Functions to communicate with the driver - -handle_fname_response(Port) -> - case drv_get_response(Port) of - {fname, Name} -> - case prim_file:internal_native2name(Name) of - {error, warning} -> - error_logger:warning_msg("Non-unicode filename ~p " - "ignored when reading link\n", - [Name]), - {error, einval}; - {error, _} -> - {error, einval}; - Converted when is_list(Converted) -> - {ok, Converted} - end; - Error -> - Error +read_file_info(Filename) -> + read_info_1(Filename, 1, local). +read_file_info(Filename, Opts) -> + read_info_1(Filename, 1, proplist_get_value(time, Opts, local)). + +read_link_info(Name) -> + read_info_1(Name, 0, local). +read_link_info(Name, Opts) -> + read_info_1(Name, 0, proplist_get_value(time, Opts, local)). + +read_info_1(Name, FollowLinks, TimeType) -> + try read_info_nif(encode_path(Name), FollowLinks) of + {error, Reason} -> {error, Reason}; + FileInfo -> + CTime = from_posix_seconds(FileInfo#file_info.ctime, TimeType), + MTime = from_posix_seconds(FileInfo#file_info.mtime, TimeType), + ATime = from_posix_seconds(FileInfo#file_info.atime, TimeType), + {ok, FileInfo#file_info{ ctime = CTime, mtime = MTime, atime = ATime }} + catch + error:badarg -> {error, badarg} end. -handle_fname_response_all(Port) -> - case drv_get_response(Port) of - {fname, Name} -> - case prim_file:internal_native2name(Name) of - {error, _} -> - {ok, Name}; - Converted when is_list(Converted) -> - {ok, Converted} - end; - Error -> - Error +write_file_info(Filename, Info) -> + write_file_info_1(Filename, Info, local). +write_file_info(Filename, Info, Opts) -> + write_file_info_1(Filename, Info, proplist_get_value(time, Opts, local)). + +write_file_info_1(Filename, Info, TimeType) -> + #file_info{ mode = Modes, + uid = Uid, + gid = Gid, + atime = ATime0, + mtime = MTime0, + ctime = CTime0} = Info, + try + % ATime and/or MTime might be undefined + % - use localtime() for atime, if atime is undefined + % - use atime as mtime if mtime is undefined + % - use mtime as ctime if ctime is undefined + ATime = file_info_convert_atime(ATime0, TimeType), + MTime = file_info_convert_mtime(MTime0, ATime, TimeType), + CTime = file_info_convert_ctime(CTime0, MTime, TimeType), + EncodedName = encode_path(Filename), + + %% This is a bit ugly but we need to handle partial failures the same + %% way the old driver did. + throw_on_error(set_owner(EncodedName, Uid, Gid)), + throw_on_error(set_permissions(EncodedName, Modes)), + throw_on_error(set_time(EncodedName, ATime, MTime, CTime)) + catch + throw:Reason -> {error, Reason}; + error:_ -> {error, badarg} end. -%% Opens a driver port and converts any problems into {error, emfile}. -%% Returns {ok, Port} when successful. +set_owner(_EncodedName, undefined, undefined) -> + ok; +set_owner(EncodedName, Uid, Gid) -> + set_owner_nif(EncodedName, Uid, Gid). +set_owner_nif(_Path, _Uid, _Gid) -> + erlang:nif_error(undef). -drv_open(Driver, Portopts) -> - try erlang:open_port({spawn_driver, Driver}, Portopts) of - Port -> - {ok, Port} +set_permissions(_EncodedName, undefined) -> + ok; +set_permissions(EncodedName, Permissions) -> + set_permissions_nif(EncodedName, Permissions). +set_permissions_nif(_Path, _Permissions) -> + erlang:nif_error(undef). + +set_time(EncodedName, ATime, MTime, CTime) -> + set_time_nif(EncodedName, ATime, MTime, CTime). +set_time_nif(_Path, _ATime, _MTime, _CTime) -> + erlang:nif_error(undef). + +throw_on_error(ok) -> ok; +throw_on_error({error, enotsup}) -> ok; +throw_on_error({error, Reason}) -> throw(Reason). + +file_info_convert_atime(ATime, TimeType) when ATime =/= undefined -> + to_posix_seconds(ATime, TimeType); +file_info_convert_atime(undefined, local) -> + to_posix_seconds(erlang:localtime(), local); +file_info_convert_atime(undefined, universal) -> + to_posix_seconds(erlang:universaltime(), universal); +file_info_convert_atime(undefined, posix) -> + erlang:universaltime_to_posixtime(erlang:universaltime()). + +file_info_convert_mtime(undefined, ATime, _TimeType) -> + ATime; +file_info_convert_mtime(MTime, _ATime, TimeType) -> + to_posix_seconds(MTime, TimeType). + +file_info_convert_ctime(undefined, MTime, _TimeType) -> + MTime; +file_info_convert_ctime(CTime, _MTime, TimeType) -> + to_posix_seconds(CTime, TimeType). + +%% This is only relevant on Windows, so we assume that format to simplify the +%% internals. +get_cwd([Letter, $:]) when Letter >= $A, Letter =< $Z -> + get_dcwd(Letter - $A + 1); +get_cwd([Letter, $:]) when Letter >= $a, Letter =< $z -> + get_dcwd(Letter - $a + 1); +get_cwd([_|_]) -> + {error, einval}; +get_cwd(_) -> + {error, badarg}. +get_dcwd(Index) -> + try get_device_cwd_nif(Index) of + {ok, RawPath} -> {ok, decode_path(RawPath)}; + {error, Reason} -> {error, Reason} catch - error:Reason -> - {error, Reason} + error:badarg -> {error, badarg} end. - - -%% Closes a port in a safe way. Returns ok. - -drv_close(Port) -> - Save = erlang:dt_spread_tag(false), +get_cwd() -> + try get_cwd_nif() of + {ok, RawPath} -> {ok, decode_path(RawPath)}; + {error, Reason} -> {error, Reason} + catch + error:badarg -> {error, badarg} + end. +set_cwd(Path) -> try - try erlang:port_close(Port) catch error:_ -> ok end, - receive %% Ugly workaround in case the caller==owner traps exits - {'EXIT', Port, _Reason} -> - ok - after 0 -> - ok - end - after - erlang:dt_restore_tag(Save) + case is_path_translatable(Path) of + true -> set_cwd_nif(encode_path(Path)); + false -> {error, no_translation} + end + catch + error:badarg -> {error, badarg} end. - - -%% Issues a command to a port and gets the response. -%% If Port is {Driver, Portopts} a port is first opened and -%% then closed after the result has been received. -%% Returns {ok, Result} or {error, Reason}. - -drv_command(Port, Command) -> - drv_command(Port, Command, undefined). - -drv_command(Port, Command, R) when is_binary(Command) -> - drv_command(Port, Command, true, R); -drv_command(Port, Command, R) -> - try erlang:iolist_size(Command) of - _ -> - drv_command(Port, Command, true, R) +delete(Path) -> + try + del_file_nif(encode_path(Path)) catch - error:Reason -> - {error, Reason} + error:badarg -> {error, badarg} end. -drv_command(Port, Command, Validated, R) when is_port(Port) -> - Save = erlang:dt_spread_tag(false), - try erlang:port_command(Port, erlang:dt_append_vm_tag_data(Command)) of - true -> - drv_get_response(Port, R) +rename(Source, Destination) -> + try + rename_nif(encode_path(Source), encode_path(Destination)) catch - %% If the Command is valid, knowing that the port is a port, - %% a badarg error must mean it is a dead port, that is: - %% a currently invalid filehandle, -> einval, not badarg. - error:badarg when Validated -> - {error, einval}; - error:badarg -> - try erlang:iolist_size(Command) of - _ -> % Valid - {error, einval} - catch - error:_ -> - {error, badarg} - end; - error:Reason -> - {error, Reason} - after - erlang:dt_restore_tag(Save) - end; -drv_command({Driver, Portopts}, Command, Validated, R) -> - case drv_open(Driver, Portopts) of - {ok, Port} -> - Result = drv_command(Port, Command, Validated, R), - drv_close(Port), - Result; - Error -> - Error + error:badarg -> {error, badarg} end. -drv_command_nt(Port, Command, R) when is_port(Port) -> - Save = erlang:dt_spread_tag(false), - try erlang:port_command(Port, Command) of - true -> - drv_get_response(Port, R) +make_dir(Path) -> + try + make_dir_nif(encode_path(Path)) catch - error:badarg -> - try erlang:iolist_size(Command) of - _ -> % Valid - {error, einval} - catch - error:_ -> - {error, badarg} - end; - error:Reason -> - {error, Reason} - after - erlang:dt_restore_tag(Save) + error:badarg -> {error, badarg} end. - - - -%% Receives the response from a driver port. -%% Returns: {ok, ListOrBinary}|{error, Reason} - -drv_get_response(Port, undefined) -> - drv_get_response(Port); -drv_get_response(Port, Fun) when is_function(Fun, 1) -> - Fun(Port). - -drv_get_response(Port) -> - erlang:bump_reductions(100), - receive - {Port, {data, [Response|Rest] = Data}} -> - try translate_response(Response, Rest) - catch - error:Reason -> - {error, {bad_response_from_port, Data, - {Reason, erlang:get_stacktrace()}}} - end; - {'EXIT', Port, Reason} -> - {error, {port_died, Reason}} +del_dir(Path) -> + try + del_dir_nif(encode_path(Path)) + catch + error:badarg -> {error, badarg} end. - - -%%%----------------------------------------------------------------- -%%% Utility functions. - -%% Converts a list of mode atoms into a mode word for the driver. -%% Returns {Mode, Portopts, Setopts} where Portopts is a list of -%% options for erlang:open_port/2 and Setopts is a list of -%% setopt commands to send to the port, or error Reason upon failure. - -open_mode(List) when is_list(List) -> - case open_mode(List, 0, [], []) of - {Mode, Portopts, Setopts} when Mode band - (?EFILE_MODE_READ bor ?EFILE_MODE_WRITE) - =:= 0 -> - {Mode bor ?EFILE_MODE_READ, Portopts, Setopts}; - Other -> - Other +make_link(Existing, New) -> + try + make_hard_link_nif(encode_path(Existing), encode_path(New)) + catch + error:badarg -> {error, badarg} end. - -open_mode([raw|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode, Portopts, Setopts); -open_mode([read|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode bor ?EFILE_MODE_READ, Portopts, Setopts); -open_mode([write|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode bor ?EFILE_MODE_WRITE, Portopts, Setopts); -open_mode([binary|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode, [binary | Portopts], Setopts); -open_mode([compressed|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode bor ?EFILE_COMPRESSED, Portopts, Setopts); -open_mode([append|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode bor ?EFILE_MODE_APPEND bor ?EFILE_MODE_WRITE, - Portopts, Setopts); -open_mode([exclusive|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode bor ?EFILE_MODE_EXCL, Portopts, Setopts); -open_mode([sync|Rest], Mode, Portopts, Setopts) -> - open_mode(Rest, Mode bor ?EFILE_MODE_SYNC, Portopts, Setopts); -open_mode([delayed_write|Rest], Mode, Portopts, Setopts) -> - open_mode([{delayed_write, 64*1024, 2000}|Rest], Mode, - Portopts, Setopts); -open_mode([{delayed_write, Size, Delay}|Rest], Mode, Portopts, Setopts) - when is_integer(Size), 0 =< Size, is_integer(Delay), 0 =< Delay -> - if - Size < ?LARGEFILESIZE, Delay < 1 bsl 64 -> - open_mode(Rest, Mode, Portopts, - [<<?FILE_SETOPT, ?FILE_OPT_DELAYED_WRITE, - Size:64, Delay:64>> - | Setopts]); - true -> - einval - end; -open_mode([read_ahead|Rest], Mode, Portopts, Setopts) -> - open_mode([{read_ahead, 64*1024}|Rest], Mode, Portopts, Setopts); -open_mode([{read_ahead, Size}|Rest], Mode, Portopts, Setopts) - when is_integer(Size), 0 =< Size -> - if - Size < ?LARGEFILESIZE -> - open_mode(Rest, Mode, Portopts, - [<<?FILE_SETOPT, ?FILE_OPT_READ_AHEAD, - Size:64>> | Setopts]); - true -> - einval - end; -open_mode([], Mode, Portopts, Setopts) -> - {Mode, reverse(Portopts), reverse(Setopts)}; -open_mode(_, _Mode, _Portopts, _Setopts) -> - badarg. - - - -%% Converts a position tuple {bof, X} | {cur, X} | {eof, X} into -%% {Offset, OriginCode} for the driver. -%% Returns badarg upon failure. - -lseek_position(Pos) - when is_integer(Pos) -> - lseek_position({bof, Pos}); -lseek_position(bof) -> - lseek_position({bof, 0}); -lseek_position(cur) -> - lseek_position({cur, 0}); -lseek_position(eof) -> - lseek_position({eof, 0}); -lseek_position({bof, Offset}) - when is_integer(Offset) -> - {Offset, ?EFILE_SEEK_SET}; -lseek_position({cur, Offset}) - when is_integer(Offset) -> - {Offset, ?EFILE_SEEK_CUR}; -lseek_position({eof, Offset}) - when is_integer(Offset) -> - {Offset, ?EFILE_SEEK_END}; -lseek_position(_) -> - badarg. - - - -%% Translates the response from the driver into -%% {ok, Result} or {error, Reason}. - --dialyzer({no_improper_lists, translate_response/2}). -translate_response(?FILE_RESP_OK, []) -> - ok; -translate_response(?FILE_RESP_ERROR, List) when is_list(List) -> - {error, list_to_atom(List)}; -translate_response(?FILE_RESP_NUMBER, List) -> - {N, []} = get_uint64(List), - {ok, N}; -translate_response(?FILE_RESP_DATA, List) -> - {_N, _Data} = ND = get_uint64(List), - {ok, ND}; -translate_response(?FILE_RESP_INFO, List) when is_list(List) -> - {ok, transform_info(List)}; -translate_response(?FILE_RESP_NUMERR, L0) -> - {N, L1} = get_uint64(L0), - {error, {N, list_to_atom(L1)}}; -translate_response(?FILE_RESP_LDATA, List) -> - {ok, transform_ldata(List)}; -translate_response(?FILE_RESP_N2DATA, - <<Offset:64, 0:64, Size:64>>) -> - {ok, {Size, Offset, eof}}; -translate_response(?FILE_RESP_N2DATA, - [<<Offset:64, 0:64, Size:64>> | <<>>]) -> - {ok, {Size, Offset, eof}}; -translate_response(?FILE_RESP_N2DATA = X, - [<<_:64, 0:64, _:64>> | _] = Data) -> - {error, {bad_response_from_port, [X | Data]}}; -translate_response(?FILE_RESP_N2DATA = X, - [<<_:64, _:64, _:64>> | <<>>] = Data) -> - {error, {bad_response_from_port, [X | Data]}}; -translate_response(?FILE_RESP_N2DATA, - [<<Offset:64, _ReadSize:64, Size:64>> | D]) -> - {ok, {Size, Offset, D}}; -translate_response(?FILE_RESP_N2DATA = X, L0) when is_list(L0) -> - {Offset, L1} = get_uint64(L0), - {ReadSize, L2} = get_uint64(L1), - {Size, L3} = get_uint64(L2), - case {ReadSize, L3} of - {0, []} -> - {ok, {Size, Offset, eof}}; - {0, _} -> - {error, {bad_response_from_port, [X | L0]}}; - {_, []} -> - {error, {bad_response_from_port, [X | L0]}}; - _ -> - {ok, {Size, Offset, L3}} - end; -translate_response(?FILE_RESP_EOF, []) -> - eof; -translate_response(?FILE_RESP_FNAME, Data) -> - {fname, Data}; -translate_response(?FILE_RESP_LFNAME, Data) -> - {lfname, Data}; -translate_response(?FILE_RESP_ALL_DATA, Data) -> - {ok, Data}; -translate_response(X, Data) -> - {error, {bad_response_from_port, [X | Data]}}. - -transform_info([ - Hsize1, Hsize2, Hsize3, Hsize4, - Lsize1, Lsize2, Lsize3, Lsize4, - Type1, Type2, Type3, Type4, - Atime1, Atime2, Atime3, Atime4, Atime5, Atime6, Atime7, Atime8, - Mtime1, Mtime2, Mtime3, Mtime4, Mtime5, Mtime6, Mtime7, Mtime8, - Ctime1, Ctime2, Ctime3, Ctime4, Ctime5, Ctime6, Ctime7, Ctime8, - Mode1, Mode2, Mode3, Mode4, - Links1, Links2, Links3, Links4, - Major1, Major2, Major3, Major4, - Minor1, Minor2, Minor3, Minor4, - Inode1, Inode2, Inode3, Inode4, - Uid1, Uid2, Uid3, Uid4, - Gid1, Gid2, Gid3, Gid4, - Access1,Access2,Access3,Access4]) -> - #file_info { - size = uint32(Hsize1,Hsize2,Hsize3,Hsize4)*16#100000000 + uint32(Lsize1,Lsize2,Lsize3,Lsize4), - type = file_type(uint32(Type1,Type2,Type3,Type4)), - access = file_access(uint32(Access1,Access2,Access3,Access4)), - atime = sint64(Atime1, Atime2, Atime3, Atime4, Atime5, Atime6, Atime7, Atime8), - mtime = sint64(Mtime1, Mtime2, Mtime3, Mtime4, Mtime5, Mtime6, Mtime7, Mtime8), - ctime = sint64(Ctime1, Ctime2, Ctime3, Ctime4, Ctime5, Ctime6, Ctime7, Ctime8), - mode = uint32(Mode1,Mode2,Mode3,Mode4), - links = uint32(Links1,Links2,Links3,Links4), - major_device = uint32(Major1,Major2,Major3,Major4), - minor_device = uint32(Minor1,Minor2,Minor3,Minor4), - inode = uint32(Inode1,Inode2,Inode3,Inode4), - uid = uint32(Uid1,Uid2,Uid3,Uid4), - gid = uint32(Gid1,Gid2,Gid3,Gid4) - }. - - -file_type(1) -> device; -file_type(2) -> directory; -file_type(3) -> regular; -file_type(4) -> symlink; -file_type(_) -> other. - -file_access(0) -> none; -file_access(1) -> write; -file_access(2) -> read; -file_access(3) -> read_write. - -int_to_int32bytes(Int) when is_integer(Int) -> - <<Int:32>>; -int_to_int32bytes(undefined) -> - <<-1:32>>. - -int_to_int64bytes(Int) when is_integer(Int) -> - <<Int:64/signed>>. - - -sint64(I1,I2,I3,I4,I5,I6,I7,I8) when I1 > 127 -> - ((I1 bsl 56) bor (I2 bsl 48) bor (I3 bsl 40) bor (I4 bsl 32) bor - (I5 bsl 24) bor (I6 bsl 16) bor (I7 bsl 8) bor I8) - (1 bsl 64); -sint64(I1,I2,I3,I4,I5,I6,I7,I8) -> - ((I1 bsl 56) bor (I2 bsl 48) bor (I3 bsl 40) bor (I4 bsl 32) bor - (I5 bsl 24) bor (I6 bsl 16) bor (I7 bsl 8) bor I8). - - -uint32(X1,X2,X3,X4) -> - (X1 bsl 24) bor (X2 bsl 16) bor (X3 bsl 8) bor X4. - -get_uint64(L0) -> - {X1, L1} = get_uint32(L0), - {X2, L2} = get_uint32(L1), - {(X1 bsl 32) bor X2, L2}. - -get_uint32([X1,X2,X3,X4|List]) -> - {(((((X1 bsl 8) bor X2) bsl 8) bor X3) bsl 8) bor X4, List}. - - -%% Binary mode -transform_ldata(<<0:32, 0:32>>) -> - []; -transform_ldata([<<0:32, N:32, Sizes/binary>> | Datas]) -> - transform_ldata(N, Sizes, Datas, []); -%% List mode -transform_ldata([_,_,_,_,_,_,_,_|_] = L0) -> - {0, L1} = get_uint32(L0), - {N, L2} = get_uint32(L1), - transform_ldata(N, L2, []). - -%% List mode -transform_ldata(0, List, Sizes) -> - transform_ldata(0, List, reverse(Sizes), []); -transform_ldata(N, L0, Sizes) -> - {Size, L1} = get_uint64(L0), - transform_ldata(N-1, L1, [Size | Sizes]). - -%% Binary mode -transform_ldata(1, <<0:64>>, <<>>, R) -> - reverse(R, [eof]); -transform_ldata(1, <<Size:64>>, Data, R) - when byte_size(Data) =:= Size -> - reverse(R, [Data]); -transform_ldata(N, <<0:64, Sizes/binary>>, [<<>> | Datas], R) -> - transform_ldata(N-1, Sizes, Datas, [eof | R]); -transform_ldata(N, <<Size:64, Sizes/binary>>, [Data | Datas], R) - when byte_size(Data) =:= Size -> - transform_ldata(N-1, Sizes, Datas, [Data | R]); -%% List mode -transform_ldata(0, [], [], R) -> - reverse(R); -transform_ldata(0, List, [0 | Sizes], R) -> - transform_ldata(0, List, Sizes, [eof | R]); -transform_ldata(0, List, [Size | Sizes], R) -> - {Front, Rear} = lists_split(List, Size), - transform_ldata(0, Rear, Sizes, [Front | R]). - -lists_split(List, 0) when is_list(List) -> - {[], List}; -lists_split(List, N) when is_list(List), is_integer(N), N < 0 -> - erlang:error(badarg, [List, N]); -lists_split(List, N) when is_list(List), is_integer(N) -> - case lists_split(List, N, []) of - premature_end_of_list -> - erlang:error(badarg, [List, N]); - Result -> - Result +make_symlink(Existing, New) -> + try + make_soft_link_nif(encode_path(Existing), encode_path(New)) + catch + error:badarg -> {error, badarg} end. -lists_split(List, 0, Rev) -> - {reverse(Rev), List}; -lists_split([], _, _) -> - premature_end_of_list; -lists_split([Hd | Tl], N, Rev) -> - lists_split(Tl, N-1, [Hd | Rev]). - -%% We KNOW that lists:reverse/2 is a BIF. - -reverse(X) -> lists:reverse(X, []). -reverse(L, T) -> lists:reverse(L, T). +altname(Path) -> + try altname_nif(encode_path(Path)) of + {ok, RawPath} -> {ok, decode_path(RawPath)}; + Other -> Other + catch + error:badarg -> {error, badarg} + end. -% Will add zero termination too -% The 'EXIT' tuple from a bad argument will eventually generate an error -% in list_to_binary, which is caught and generates the {error,badarg} return -pathname(File) -> - (catch prim_file:internal_name2native(File)). +list_dir_nif(_Path) -> + erlang:nif_error(undef). +read_link_nif(_Path) -> + erlang:nif_error(undef). +read_info_nif(_Path, _FollowLinks) -> + erlang:nif_error(undef). +make_hard_link_nif(_Existing, _New) -> + erlang:nif_error(undef). +make_soft_link_nif(_Existing, _New) -> + erlang:nif_error(undef). +rename_nif(_Source, _Destination) -> + erlang:nif_error(undef). +make_dir_nif(_Path) -> + erlang:nif_error(undef). +del_file_nif(_Path) -> + erlang:nif_error(undef). +del_dir_nif(_Path) -> + erlang:nif_error(undef). +get_device_cwd_nif(_DevicePath) -> + erlang:nif_error(undef). +set_cwd_nif(_Path) -> + erlang:nif_error(undef). +get_cwd_nif() -> + erlang:nif_error(undef). +altname_nif(_Path) -> + erlang:nif_error(undef). +%% +%% General helper functions. +%% -%% proplist:get_value/3 -plgv(K, [{K, V}|_], _) -> V; -plgv(K, [_|KVs], D) -> plgv(K, KVs, D); -plgv(_, [], D) -> D. +%% We know for certain that lists:reverse/2 is a BIF, so it's safe to use it +%% even though this module is preloaded. +reverse_list(List) -> lists:reverse(List). + +proplist_get_value(_Key, [], Default) -> + Default; +proplist_get_value(Key, [{Key, Value} | _Rest], _Default) -> + Value; +proplist_get_value(Key, [Key | _Rest], _Default) -> + true; +proplist_get_value(Key, [_Other | Rest], Default) -> + proplist_get_value(Key, Rest, Default). + +encode_path(Path) -> + prim_file:internal_name2native(Path). +decode_path(NativePath) when is_binary(NativePath) -> + prim_file:internal_native2name(NativePath). + +is_path_translatable(Path) when is_list(Path) -> + true; +is_path_translatable(Path) -> + prim_file:is_translatable(Path). -%% %% We don't actually want this here +%% %% We want to use posix time in all prim but erl_prim_loader makes that tricky %% It is probably needed to redo the whole erl_prim_loader -from_seconds(Seconds, posix) when is_integer(Seconds) -> +from_posix_seconds(Seconds, posix) when is_integer(Seconds) -> Seconds; -from_seconds(Seconds, universal) when is_integer(Seconds) -> +from_posix_seconds(Seconds, universal) when is_integer(Seconds) -> erlang:posixtime_to_universaltime(Seconds); -from_seconds(Seconds, local) when is_integer(Seconds) -> +from_posix_seconds(Seconds, local) when is_integer(Seconds) -> erlang:universaltime_to_localtime(erlang:posixtime_to_universaltime(Seconds)). -to_seconds(Seconds, posix) when is_integer(Seconds) -> +to_posix_seconds(Seconds, posix) when is_integer(Seconds) -> Seconds; -to_seconds({_,_} = Datetime, universal) -> +to_posix_seconds({_,_} = Datetime, universal) -> erlang:universaltime_to_posixtime(Datetime); -to_seconds({_,_} = Datetime, local) -> +to_posix_seconds({_,_} = Datetime, local) -> erlang:universaltime_to_posixtime(erlang:localtime_to_universaltime(Datetime)). diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl index 017a706a8b..2a3605260d 100644 --- a/erts/preloaded/src/prim_inet.erl +++ b/erts/preloaded/src/prim_inet.erl @@ -31,7 +31,7 @@ -export([connect/3, connect/4, async_connect/4]). -export([accept/1, accept/2, async_accept/2]). -export([shutdown/2]). --export([send/2, send/3, sendto/4, sendmsg/3]). +-export([send/2, send/3, sendto/4, sendmsg/3, sendfile/4]). -export([recv/2, recv/3, async_recv/3]). -export([unrecv/2]). -export([recvfrom/2, recvfrom/3]). @@ -500,6 +500,55 @@ sendmsg(S, #sctp_sndrcvinfo{}=SRI, Data) when is_port(S) -> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% +%% SENDFILE(outsock(), Fd, Offset, Length) -> {ok,BytesSent} | {error, Reason} +%% +%% send Length data bytes from a file handle, to a socket, starting at Offset +%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% "sendfile" is for TCP: + +sendfile(S, FileHandle, Offset, Length) + when not is_port(S); + not is_binary(FileHandle); + not is_integer(Offset); + not is_integer(Length) -> + {error, badarg}; +sendfile(S, FileHandle, Offset, Length) -> + case erlang:port_info(S, connected) of + {connected, Pid} when Pid =:= self() -> + sendfile_1(S, FileHandle, Offset, Length); + {connected, Pid} when Pid =/= self() -> + {error, not_owner}; + _Other -> + {error, einval} + end. + +sendfile_1(S, FileHandle, Offset, 0) -> + sendfile_1(S, FileHandle, Offset, (1 bsl 63) - 1); +sendfile_1(_S, _FileHandle, Offset, Length) when + Offset < 0; Offset > ((1 bsl 63) - 1); + Length < 0; Length > ((1 bsl 63) - 1) -> + {error, einval}; +sendfile_1(S, FileHandle, Offset, Length) -> + Args = [FileHandle, + ?int64(Offset), + ?int64(Length)], + case ctl_cmd(S, ?TCP_REQ_SENDFILE, Args) of + {ok, []} -> + receive + {sendfile, S, {ok, SentLow, SentHigh}} -> + {ok, SentLow bor (SentHigh bsl 32)}; + {sendfile, S, {error, Reason}} -> + {error, Reason}; + {'EXIT', S, _Reason} -> + {error, closed} + end; + {error, Reason} -> + {error, Reason} + end. + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% %% RECV(insock(), Length, [Timeout]) -> {ok,Data} | {error, Reason} %% %% receive Length data bytes from a socket |