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author | Erlang/OTP <otp@erlang.org> | 2012-01-18 11:14:14 +0100 |
---|---|---|
committer | Erlang/OTP <otp@erlang.org> | 2012-01-18 11:14:14 +0100 |
commit | 5edf4b3ffa73874c9f612f2d919df9a21fc140c1 (patch) | |
tree | fb5982d66371f2b0cc7397abe8104c69863bd9d0 | |
parent | f8815dc88bd86d6508d2a3dad031ea939fb2b443 (diff) | |
parent | 77b157e42a7fd1a6f325276bdd88fd1a7f6bbea4 (diff) | |
download | otp-5edf4b3ffa73874c9f612f2d919df9a21fc140c1.tar.gz otp-5edf4b3ffa73874c9f612f2d919df9a21fc140c1.tar.bz2 otp-5edf4b3ffa73874c9f612f2d919df9a21fc140c1.zip |
Merge branch 'raimo/64-bit-efile_drv/OTP-9820' into maint
* raimo/64-bit-efile_drv/OTP-9820:
file_SUITE: Assume 64-bit windows has enough memory
erts: Badarg if port output overflows iov_len
prim_file_SUITE: large_file success depends on wordsize
file_SUITE: Increase timeout for large_file
file_SITE,prim_file_SUITE: Accept old OpenBSD pecularity
prim_file_SUITE: large_write - meaner test data and check result content
file_SUITE: large_write - check mem size before creating huge binary
erts: rewrite efile_writev to handle partial writes correctly
erts: Bugfix - driver_deq freed wrong length due to short type (int)
prim_file_SUITE: Add large_write/1
file_SUITE: Add large_write/1
file_SUITE: Refactor large_file/1
file_SUITE: Fix unix_free/1
-rw-r--r-- | erts/emulator/beam/io.c | 21 | ||||
-rw-r--r-- | erts/emulator/drivers/common/efile_drv.c | 8 | ||||
-rw-r--r-- | erts/emulator/drivers/common/erl_efile.h | 2 | ||||
-rw-r--r-- | erts/emulator/drivers/unix/unix_efile.c | 97 | ||||
-rw-r--r-- | erts/emulator/drivers/win32/win_efile.c | 3 | ||||
-rw-r--r-- | lib/kernel/test/file_SUITE.erl | 192 | ||||
-rw-r--r-- | lib/kernel/test/prim_file_SUITE.erl | 109 |
7 files changed, 315 insertions, 117 deletions
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c index 49cd0e5f53..b23b1f628d 100644 --- a/erts/emulator/beam/io.c +++ b/erts/emulator/beam/io.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2011. All Rights Reserved. + * Copyright Ericsson AB 1996-2012. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -818,6 +818,11 @@ erts_smp_xports_unlock(Port *prt) #define SET_VEC(iov, bv, bin, ptr, len, vlen) do { \ (iov)->iov_base = (ptr); \ (iov)->iov_len = (len); \ + if (sizeof((iov)->iov_len) < sizeof(len) \ + /* Check if (len) overflowed (iov)->iov_len */ \ + && ((len) >> (sizeof((iov)->iov_len)*CHAR_BIT)) != 0) { \ + goto L_overflow; \ + } \ *(bv)++ = (bin); \ (iov)++; \ (vlen)++; \ @@ -1146,11 +1151,21 @@ int erts_write_to_port(Eterm caller_id, Port *p, Eterm list) ivp[0].iov_len = 0; bvp[0] = NULL; ev.vsize = io_list_to_vec(list, ivp+1, bvp+1, cbin, blimit); + if (ev.vsize < 0) { + if (ivp != iv) { + erts_free(ERTS_ALC_T_TMP, (void *) ivp); + } + if (bvp != bv) { + erts_free(ERTS_ALC_T_TMP, (void *) bvp); + } + driver_free_binary(cbin); + goto bad_value; + } ev.vsize++; #if 0 /* This assertion may say something useful, but it can be falsified during the emulator test suites. */ - ASSERT((ev.vsize >= 0) && (ev.vsize == vsize)); + ASSERT(ev.vsize == vsize); #endif ev.size = size; /* total size */ ev.iov = ivp; @@ -3912,7 +3927,7 @@ int driver_pushqv(ErlDrvPort ix, ErlIOVec* vec, ErlDrvSizeT skip) ErlDrvSizeT driver_deq(ErlDrvPort ix, ErlDrvSizeT size) { ErlIOQueue* q = drvport2ioq(ix); - int len; + ErlDrvSizeT len; if ((q == NULL) || (q->size < size)) return -1; diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c index b132991a3b..36ed108b76 100644 --- a/erts/emulator/drivers/common/efile_drv.c +++ b/erts/emulator/drivers/common/efile_drv.c @@ -1385,7 +1385,11 @@ static void invoke_writev(void *data) { size = d->c.writev.size; } - /* Copy the io vector to avoid locking the port que while writing */ + /* Copy the io vector to avoid locking the port que while writing, + * also, both we and efile_writev might/will change the SysIOVec + * when segmenting or due to partial write and we do not want to + * tamper with the actual queue that we get from driver_peekq + */ MUTEX_LOCK(d->c.writev.q_mtx); /* Lock before accessing the port queue */ iov0 = driver_peekq(d->c.writev.port, &iovlen); @@ -1424,7 +1428,7 @@ static void invoke_writev(void *data) { } else { d->result_ok = efile_writev(&d->errInfo, d->flags, (int) d->fd, - iov, iovcnt, size); + iov, iovcnt); } } else if (iovlen == 0) { d->result_ok = 1; diff --git a/erts/emulator/drivers/common/erl_efile.h b/erts/emulator/drivers/common/erl_efile.h index 3868b38137..69ad02633c 100644 --- a/erts/emulator/drivers/common/erl_efile.h +++ b/erts/emulator/drivers/common/erl_efile.h @@ -162,7 +162,7 @@ int efile_write_info(Efile_error* errInfo, Efile_info* pInfo, char *name); int efile_write(Efile_error* errInfo, int flags, int fd, char* buf, size_t count); int efile_writev(Efile_error* errInfo, int flags, int fd, - SysIOVec* iov, int iovcnt, size_t size); + SysIOVec* iov, int iovcnt); int efile_read(Efile_error* errInfo, int flags, int fd, char* buf, size_t count, size_t* pBytesRead); int efile_seek(Efile_error* errInfo, int fd, diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c index 7cf0a712ce..e7dd9d2bdb 100644 --- a/erts/emulator/drivers/unix/unix_efile.c +++ b/erts/emulator/drivers/unix/unix_efile.c @@ -1004,13 +1004,11 @@ efile_writev(Efile_error* errInfo, /* Where to return error codes */ * opened */ int fd, /* File descriptor to write to */ SysIOVec* iov, /* Vector of buffer structs. - * The structs are unchanged - * after the call */ - int iovcnt, /* Number of structs in vector */ - size_t size) /* Number of bytes to write */ + * The structs may be changed i.e. + * due to incomplete writes */ + int iovcnt) /* Number of structs in vector */ { int cnt = 0; /* Buffers so far written */ - int p = 0; /* Position in next buffer */ ASSERT(iovcnt >= 0); @@ -1021,66 +1019,47 @@ efile_writev(Efile_error* errInfo, /* Where to return error codes */ #endif while (cnt < iovcnt) { + if ((! iov[cnt].iov_base) || (iov[cnt].iov_len <= 0)) { + /* Empty buffer - skip */ + cnt++; + } else { /* Non-empty buffer */ + ssize_t w; /* Bytes written in this call */ #ifdef HAVE_WRITEV - int w; /* Bytes written in this call */ - int b = iovcnt - cnt; /* Buffers to write */ - if (b > MAXIOV) - b = MAXIOV; - if (iov[cnt].iov_base && iov[cnt].iov_len > 0) { - if (b == 1) { - /* Degenerated io vector */ - do { - w = write(fd, iov[cnt].iov_base + p, iov[cnt].iov_len - p); - } while (w < 0 && errno == EINTR); - } else { - /* Non-empty vector first. - * Adjust pos in first buffer in case of - * previous incomplete writev */ - iov[cnt].iov_base += p; - iov[cnt].iov_len -= p; + int b = iovcnt - cnt; /* Buffers to write */ + /* Use as many buffers as MAXIOV allows */ + if (b > MAXIOV) + b = MAXIOV; + if (b > 1) { do { w = writev(fd, &iov[cnt], b); } while (w < 0 && errno == EINTR); - iov[cnt].iov_base -= p; - iov[cnt].iov_len += p; - } - if (w < 0) - return check_error(-1, errInfo); - } else { - /* Empty vector first - skip */ - cnt++; - continue; - } - ASSERT(w >= 0); - /* Move forward to next vector to write */ - for (; cnt < iovcnt; cnt++) { - if (iov[cnt].iov_base && iov[cnt].iov_len > 0) { - if (w < iov[cnt].iov_len) - break; - else - w -= iov[cnt].iov_len; - } - } - ASSERT(w >= 0); - p = w > 0 ? w : 0; /* Skip p bytes next writev */ -#else /* #ifdef HAVE_WRITEV */ - if (iov[cnt].iov_base && iov[cnt].iov_len > 0) { - /* Non-empty vector */ - int w; /* Bytes written in this call */ - while (p < iov[cnt].iov_len) { - do { - w = write(fd, iov[cnt].iov_base + p, iov[cnt].iov_len - p); - } while (w < 0 && errno == EINTR); - if (w < 0) - return check_error(-1, errInfo); - p += w; + } else + /* Degenerated io vector - use regular write */ +#endif + { + do { + w = write(fd, iov[cnt].iov_base, iov[cnt].iov_len); + } while (w < 0 && errno == EINTR); + ASSERT(w <= iov[cnt].iov_len); + } + if (w < 0) return check_error(-1, errInfo); + /* Move forward to next buffer to write */ + for (; cnt < iovcnt && w > 0; cnt++) { + if (iov[cnt].iov_base && iov[cnt].iov_len > 0) { + if (w < iov[cnt].iov_len) { + /* Adjust the buffer for next write */ + iov[cnt].iov_len -= w; + iov[cnt].iov_base += w; + w = 0; + break; + } else { + w -= iov[cnt].iov_len; + } + } } - } - cnt++; - p = 0; -#endif /* #ifdef HAVE_WRITEV */ + ASSERT(w == 0); + } /* else Non-empty buffer */ } /* while (cnt< iovcnt) */ - size = 0; /* Avoid compiler warning */ return 1; } diff --git a/erts/emulator/drivers/win32/win_efile.c b/erts/emulator/drivers/win32/win_efile.c index 0d3d334154..606fa1d7de 100644 --- a/erts/emulator/drivers/win32/win_efile.c +++ b/erts/emulator/drivers/win32/win_efile.c @@ -1115,8 +1115,7 @@ efile_writev(Efile_error* errInfo, /* Where to return error codes */ SysIOVec* iov, /* Vector of buffer structs. * The structs are unchanged * after the call */ - int iovcnt, /* Number of structs in vector */ - size_t size) /* Number of bytes to write */ + int iovcnt) /* Number of structs in vector */ { int cnt; /* Buffers so far written */ OVERLAPPED overlapped; diff --git a/lib/kernel/test/file_SUITE.erl b/lib/kernel/test/file_SUITE.erl index 85346762ac..6cab40d49d 100644 --- a/lib/kernel/test/file_SUITE.erl +++ b/lib/kernel/test/file_SUITE.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 1996-2011. All Rights Reserved. +%% Copyright Ericsson AB 1996-2012. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -78,7 +78,7 @@ -export([altname/1]). --export([large_file/1]). +-export([large_file/1, large_write/1]). -export([read_line_1/1, read_line_2/1, read_line_3/1,read_line_4/1]). @@ -92,6 +92,8 @@ -export([bytes/2, iterate/3]). +%% System probe functions that might be handy to check from the shell +-export([unix_free/1, memsize/0, bsd_memsize/1]). -include_lib("test_server/include/test_server.hrl"). -include_lib("kernel/include/file.hrl"). @@ -106,7 +108,7 @@ all() -> {group, compression}, {group, links}, copy, delayed_write, read_ahead, segment_read, segment_write, ipread, pid2name, interleaved_read_write, otp_5814, - large_file, read_line_1, read_line_2, read_line_3, + large_file, large_write, read_line_1, read_line_2, read_line_3, read_line_4, standard_io]. groups() -> @@ -394,6 +396,7 @@ make_del_dir(Config) when is_list(Config) -> %% Don't worry ;-) the parent directory should never be empty, right? ?line case ?FILE_MODULE:del_dir('..') of {error, eexist} -> ok; + {error, eacces} -> ok; %OpenBSD {error, einval} -> ok %FreeBSD end, ?line {error, enoent} = ?FILE_MODULE:del_dir(""), @@ -3287,50 +3290,13 @@ large_file(suite) -> large_file(doc) -> ["Tests positioning in large files (> 4G)"]; large_file(Config) when is_list(Config) -> - case {os:type(),os:version()} of - {{win32,nt},_} -> - do_large_file(Config); - {{unix,sunos},{A,B,C}} - when A == 5, B == 5, C >= 1; A == 5, B >= 6; A >= 6 -> - do_large_file(Config); - {{unix,Unix},_} when Unix =/= sunos -> - N = unix_free(Config), - io:format("Free: ~w KByte~n", [N]), - if N < 5 * (1 bsl 20) -> - %% Less than 5 GByte free - {skipped,"Less than 5 GByte free"}; - true -> - do_large_file(Config) - end; - _ -> - {skipped,"Only supported on Win32, Unix or SunOS >= 5.5.1"} - end. + run_large_file_test(Config, + fun(Name) -> do_large_file(Name) end, + "_large_file"). -unix_free(Config) -> - Cmd = ["df -k '",?config(priv_dir, Config),"'"], - DF0 = os:cmd(Cmd), - io:format("$ ~s~n~s", [Cmd,DF0]), - [$\n|DF1] = lists:dropwhile(fun ($\n) -> false; (_) -> true end, DF0), - {ok,[N],_} = io_lib:fread(" ~*s ~d", DF1), - N. +do_large_file(Name) -> + ?line Watchdog = ?t:timetrap(?t:minutes(20)), -do_large_file(Config) -> - ?line Watchdog = ?t:timetrap(?t:minutes(5)), - %% - ?line Name = filename:join(?config(priv_dir, Config), - ?MODULE_STRING ++ "_large_file"), - ?line Tester = self(), - Deleter = - spawn( - fun() -> - Mref = erlang:monitor(process, Tester), - receive - {'DOWN',Mref,_,_,_} -> ok; - {Tester,done} -> ok - end, - ?FILE_MODULE:delete(Name) - end), - %% ?line S = "1234567890", L = length(S), R = lists:reverse(S), @@ -3366,15 +3332,36 @@ do_large_file(Config) -> ?line {ok,R} = ?FILE_MODULE:read(F1, L+1), ?line ok = ?FILE_MODULE:close(F1), %% - ?line Mref = erlang:monitor(process, Deleter), - ?line Deleter ! {Tester,done}, - ?line receive {'DOWN',Mref,_,_,_} -> ok end, - %% ?line ?t:timetrap_cancel(Watchdog), ok. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +large_write(Config) when is_list(Config) -> + run_large_file_test(Config, + fun(Name) -> do_large_write(Name) end, + "_large_write"). + +do_large_write(Name) -> + Memsize = memsize(), + io:format("Memsize = ~w Bytes~n", [Memsize]), + case {erlang:system_info(wordsize),Memsize} of + {4,_} -> + {skip,"Needs a 64-bit emulator"}; + {8,N} when N < 6 bsl 30 -> + {skip, + "This machine has < 6 GB memory: " + ++integer_to_list(N)}; + {8,_} -> + Size = 4*1024*1024*1024+1, + Bin = <<0:Size/unit:8>>, + ok = file:write_file(Name, Bin), + {ok,#file_info{size=Size}} = file:read_file_info(Name), + ok + end. + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + response_analysis(Module, Function, Arguments) -> @@ -3950,3 +3937,110 @@ flush(Msgs) -> after 0 -> lists:reverse(Msgs) end. + +%%% +%%% Support for testing large files. +%%% + +run_large_file_test(Config, Run, Name) -> + case {os:type(),os:version()} of + {{win32,nt},_} -> + do_run_large_file_test(Config, Run, Name); + {{unix,sunos},OsVersion} when OsVersion < {5,5,1} -> + {skip,"Only supported on Win32, Unix or SunOS >= 5.5.1"}; + {{unix,_},_} -> + N = unix_free(?config(priv_dir, Config)), + io:format("Free disk: ~w KByte~n", [N]), + if N < 5 * (1 bsl 20) -> + %% Less than 5 GByte free + {skip,"Less than 5 GByte free"}; + true -> + do_run_large_file_test(Config, Run, Name) + end; + _ -> + {skip,"Only supported on Win32, Unix or SunOS >= 5.5.1"} + end. + + +do_run_large_file_test(Config, Run, Name0) -> + Name = filename:join(?config(priv_dir, Config), + ?MODULE_STRING ++ Name0), + + %% Set up a process that will delete this file. + Tester = self(), + Deleter = + spawn( + fun() -> + Mref = erlang:monitor(process, Tester), + receive + {'DOWN',Mref,_,_,_} -> ok; + {Tester,done} -> ok + end, + ?FILE_MODULE:delete(Name) + end), + + %% Run the test case. + Res = Run(Name), + + %% Delete file and finish deleter process. + Mref = erlang:monitor(process, Deleter), + Deleter ! {Tester,done}, + receive {'DOWN',Mref,_,_,_} -> ok end, + + Res. + +unix_free(Path) -> + Cmd = ["df -k '",Path,"'"], + DF0 = os:cmd(Cmd), + io:format("$ ~s~n~s", [Cmd,DF0]), + Lines = re:split(DF0, "\n", [trim,{return,list}]), + Last = lists:last(Lines), + RE = "^[^\\s]*\\s+\\d+\\s+\\d+\\s+(\\d+)", + {match,[Avail]} = re:run(Last, RE, [{capture,all_but_first,list}]), + list_to_integer(Avail). + +memsize() -> + case os:type() of + {unix,openbsd} -> + bsd_memsize("hw.physmem"); + {unix,freebsd} -> + bsd_memsize("hw.physmem"); + {unix,darwin} -> + bsd_memsize("hw.memsize"); + {unix,linux} -> + Meminfo = os:cmd("cat /proc/meminfo"), + Re = "^MemTotal:\\s+(\\d+)\\s+kB\$", + ReOpts = [multiline,{capture,all_but_first,list}], + case re:run(Meminfo, Re, ReOpts) of + {match,[Str]} -> + list_to_integer(Str) bsl 10; + nomatch -> + 0 + end; + {win32,_} -> + enough; % atom() > integer(); assume (64-bit) windows have enough + _ -> + 0 + end. + +bsd_memsize(MIB) -> + Reply = os:cmd(["sysctl ",MIB]), + try strip_prefix(MIB, Reply) of + Str -> + Re = "^\\s*(?::|=)\\s*(\\d+)", + ReOpts = [{capture,all_but_first,list}], + case re:run(Str, Re, ReOpts) of + {match,[SizeStr]} -> + list_to_integer(SizeStr); + nomatch -> + 0 + end + catch + error:_ -> + 0 + end. + +strip_prefix([X|Prefix], [X|List]) -> + strip_prefix(Prefix, List); +strip_prefix([], List) -> + List. diff --git a/lib/kernel/test/prim_file_SUITE.erl b/lib/kernel/test/prim_file_SUITE.erl index ccf26ee034..3e2202922c 100644 --- a/lib/kernel/test/prim_file_SUITE.erl +++ b/lib/kernel/test/prim_file_SUITE.erl @@ -52,6 +52,10 @@ list_dir_limit/1]). -export([advise/1]). +-export([large_write/1]). + +%% System probe functions that might be handy to check from the shell +-export([unix_free/1]). -include_lib("test_server/include/test_server.hrl"). -include_lib("kernel/include/file.hrl"). @@ -83,7 +87,7 @@ groups() -> cur_dir_1a, cur_dir_1b]}, {files, [], [{group, open}, {group, pos}, {group, file_info}, - truncate, sync, datasync, advise]}, + truncate, sync, datasync, advise, large_write]}, {open, [], [open1, modes, close, access, read_write, pread_write, append, exclusive]}, @@ -290,6 +294,7 @@ make_del_dir(Config, Handle, Suffix) -> %% Don't worry ;-) the parent directory should never be empty, right? ?line case ?PRIM_FILE_call(del_dir, Handle, [".."]) of {error, eexist} -> ok; + {error, eacces} -> ok; %OpenBSD {error, einval} -> ok %FreeBSD end, ?line {error, enoent} = ?PRIM_FILE_call(del_dir, Handle, [""]), @@ -1322,6 +1327,41 @@ advise(Config) when is_list(Config) -> ?line test_server:timetrap_cancel(Dog), ok. +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +large_write(Config) when is_list(Config) -> + run_large_file_test(Config, + fun(Name) -> do_large_write(Name) end, + "_large_write"). + +do_large_write(Name) -> + Dog = test_server:timetrap(test_server:minutes(60)), + ChunkSize = (256 bsl 20) + 1, % 256 M + 1 + Chunks = 16, % times 16 -> 4 G + 16 + Base = 100, + Interleave = lists:seq(Base+1, Base+Chunks), + Chunk = <<0:ChunkSize/unit:8>>, + Data = zip_data(lists:duplicate(Chunks, Chunk), Interleave), + Size = Chunks * ChunkSize + Chunks, % 4 G + 32 + Wordsize = erlang:system_info(wordsize), + case prim_file:write_file(Name, Data) of + ok when Wordsize =:= 8 -> + {ok,#file_info{size=Size}} = file:read_file_info(Name), + {ok,Fd} = prim_file:open(Name, [read]), + check_large_write(Dog, Fd, ChunkSize, 0, Interleave); + {error,einval} when Wordsize =:= 4 -> + ok + end. + +check_large_write(Dog, Fd, ChunkSize, Pos, [X|Interleave]) -> + Pos1 = Pos + ChunkSize, + {ok,Pos1} = prim_file:position(Fd, {cur,ChunkSize}), + {ok,[X]} = prim_file:read(Fd, 1), + check_large_write(Dog, Fd, ChunkSize, Pos1+1, Interleave); +check_large_write(Dog, Fd, _, _, []) -> + eof = prim_file:read(Fd, 1), + test_server:timetrap_cancel(Dog), + ok. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% @@ -2044,3 +2084,70 @@ list_dir_limit_cleanup(Dir, Handle, N, Cnt) -> ?PRIM_FILE:delete(Handle, filename:join(Dir, Name)), list_dir_limit_cleanup(Dir, Handle, N, Cnt+1). +%%% +%%% Support for testing large files. +%%% + +run_large_file_test(Config, Run, Name) -> + case {os:type(),os:version()} of + {{win32,nt},_} -> + do_run_large_file_test(Config, Run, Name); + {{unix,sunos},OsVersion} when OsVersion < {5,5,1} -> + {skip,"Only supported on Win32, Unix or SunOS >= 5.5.1"}; + {{unix,_},_} -> + N = unix_free(?config(priv_dir, Config)), + io:format("Free disk: ~w KByte~n", [N]), + if N < 5 bsl 20 -> + %% Less than 5 GByte free + {skip,"Less than 5 GByte free disk"}; + true -> + do_run_large_file_test(Config, Run, Name) + end; + _ -> + {skip,"Only supported on Win32, Unix or SunOS >= 5.5.1"} + end. + + +do_run_large_file_test(Config, Run, Name0) -> + Name = filename:join(?config(priv_dir, Config), + ?MODULE_STRING ++ Name0), + + %% Set up a process that will delete this file. + Tester = self(), + Deleter = + spawn( + fun() -> + Mref = erlang:monitor(process, Tester), + receive + {'DOWN',Mref,_,_,_} -> ok; + {Tester,done} -> ok + end, + prim_file:delete(Name) + end), + + %% Run the test case. + Res = Run(Name), + + %% Delete file and finish deleter process. + Mref = erlang:monitor(process, Deleter), + Deleter ! {Tester,done}, + receive {'DOWN',Mref,_,_,_} -> ok end, + + Res. + +unix_free(Path) -> + Cmd = ["df -k '",Path,"'"], + DF0 = os:cmd(Cmd), + io:format("$ ~s~n~s", [Cmd,DF0]), + Lines = re:split(DF0, "\n", [trim,{return,list}]), + Last = lists:last(Lines), + RE = "^[^\\s]*\\s+\\d+\\s+\\d+\\s+(\\d+)", + {match,[Avail]} = re:run(Last, RE, [{capture,all_but_first,list}]), + list_to_integer(Avail). + +zip_data([A|As], [B|Bs]) -> + [[A,B]|zip_data(As, Bs)]; +zip_data([], Bs) -> + Bs; +zip_data(As, []) -> + As. |