Re: [fpc-pascal] Javascript in Desktop Applications
On Mon, Feb 7, 2011 at 6:27 AM, michael.vancann...@wisa.be wrote: On Mon, 7 Feb 2011, Andrew Brunner wrote: On Mon, Feb 7, 2011 at 7:35 AM, michael.vancann...@wisa.be wrote: A cross-platform solution is to use one of libsee or BESEN. The latter is implemented in 100% native Object Pascal. Michael. BESEN is very, very, very well written but I can't seem to get any indication how to use it in my project. I would love FPC to include a JIT system for JS or Pascal. IMO, FPC absolutely needs a scripting FCL going forward. BESEN seems like the right guy for the job, but I suspect he's burned out :-( I think he had memory concerns too. Does anyone have any BESEN examples that integrated actual FPC units? It seems like all the samle js units are self contained with no interface to system or GUI units. Including JS support on my project would enable people to leverage exiting proven technologies which would make for easier/allowable for adoption in working groups / houses where selection of language is restricted to language of the day :-) Taking this statment and applying this across the board, it would be an easier sell for adoption of FPC/Lazarus with JIT support. Personally, I'm thinking along the lines of Web RAD down the road... Well, if you can't get BESEN to work, libsee definitely does. I even have an article on how to do it. Michael. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal I have some interest in exploring javascript implementations for fpc. http://code.google.com/p/fpcjs/ -- Is this comparable to what you have noted? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Win32 Application Query.
On Sun, Jan 23, 2011 at 2:25 AM, Justin Smyth delph...@smythconsulting.net wrote: Hi guys I've been working on a application to application communications protocol via named pipes. the basic idea would be for Application A to change a Component Property on Applications B ( ie the visible property) or a text or caption or width / height of a component. ( and also for Application to cause and event to fire on application b only , ie a screen refresh or data change event ie reset a label to its primary state ) I'm also going to allow application A to change Applications B event handlers ie onClick onEnter OnKeyPress etc so that Application A can redirect an event handler so that when an event is triggered on Application B My Question is does any components out there like fpGUI do this ? once i am done and its working i'd be happy to share the code , at present i can change component values and read them from the remote end. Kind Regards Justin Smyth ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal I think you may find what you're looking for in MSE project's IFI? components. Google MSEGUI to find it. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] JSON - RTTI streaming.
On Wed, Jan 5, 2011 at 3:12 PM, Michael Van Canneyt mich...@freepascal.org wrote: Hello, For those of you that need JSON support: I have committed support for streaming published properties (properties for which RTTI is generated) from objects to JSON and vice versa, in a unit fpjsonrtti. Not the full streaming as implemented in the classes system is supported: - No DefineProperties. - No methods. Although it should not be difficult to add support for this. In contrast, it can stream simple collections and stringlists (with ojects attached) in various ways. There are various events to influence the streaming process. This should be more than enough to stream objects to and from a web-browser. I have committed an example and a testsuite. All this is in packages/fcl-json. Despite the fact that the testsuite runs OK , I'd like to ask those for whom it might be useful to test the code and report any errors you find to me. Suggestions for improvements are also welcome. Michael. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal Nice, this was on my to do list. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Cannot get TFPTimer to work
See .../fpcsrc/packages/fcl-base/examples/testtimer.pp for example usage.
On Thu, Dec 2, 2010 at 10:39 AM, Darius Blaszyk
dhkblas...@zeelandnet.nl wrote:
Whatever I tried, I cannot get TFPTimer to work. Can someone help? For
some reason the OnTimer even is never fired. Tried on Windows and Linux.
Here's a snippet I used as test.
Regards, Darius
program fptimertest;
{$mode objfpc}{$H+}
uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
SysUtils, fpTimer;
type
{ TBaseObj }
TBaseObj = class(TObject)
tmr: TFPTimer;
public
constructor Create;
constructor Destroy;
procedure OnTimerExec(Sender: TObject);
end;
{ TBaseObj }
constructor TBaseObj.Create;
begin
tmr := TFPTimer.Create(nil);
tmr.Interval := 1;
tmr.OnTimer:=...@ontimerexec;
tmr.StartTimer;
end;
constructor TBaseObj.Destroy;
begin
tmr.StopTimer;
tmr.Free;
end;
procedure TBaseObj.OnTimerExec(Sender: TObject);
begin
writeln('Timer executed');
end;
var
test: TBaseObj;
i: integer;
begin
test := TBaseObj.Create;
for i := 1 to 1000 do
sleep(10);
writeln('done');
readln;
end.
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Re: [fpc-pascal] make fpc
On Mon, Nov 22, 2010 at 1:48 AM, Jonas Maebe jonas.ma...@elis.ugent.be wrote: On 21 Nov 2010, at 19:03, Brian Winfrey wrote: What version should fpc display (Revision: 16393). When I get latest and make /usr/bin/fpc is at version 2.4.2. fpc -vut dummy.pas ... Compiler: /usr/lib/fpc/2.4.2/ppc386 Using executable path: /usr/lib/fpc/2.4.2/ Using unit path: /usr/lib/fpc/2.4.2/units/i386-linux/rtl/ ... The output indicates that 2.4.3 directories are created and 2.4.3 compiler is used. I run make clean build make install INSTALL_PREFIX=/usr There are two separate things: the installed FPC versions, and the default FPC version. The default FPC version is determined by the symbolic links /usr/bin/ppc386, /usr/bin/ppcx64 etc (or /usr/local/bin/ppc386 etc on non-Linux). A make install will add a new FPC version, but it does not make it the default. If you want to do that, change the symlinks to point to the new compiler version. The fpc utility is only a wrapper that calls through to ppc386/ppcx64/... and has no version itself. Jonas ___ fpc-pascal maillist - fpc-pas...@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal I thought there was a sym link involved, but I mis-remembered it being fpc. That clears it up thanks. Brian ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
[fpc-pascal] Re: make fpc
I also tried make cycle as outlined in programmers guide, but results are the same. On Sun, Nov 21, 2010 at 10:03 AM, Brian Winfrey bwcod...@gmail.com wrote: What version should fpc display (Revision: 16393). When I get latest and make /usr/bin/fpc is at version 2.4.2. fpc -vut dummy.pas ... Compiler: /usr/lib/fpc/2.4.2/ppc386 Using executable path: /usr/lib/fpc/2.4.2/ Using unit path: /usr/lib/fpc/2.4.2/units/i386-linux/rtl/ ... The output indicates that 2.4.3 directories are created and 2.4.3 compiler is used. I run make clean build make install INSTALL_PREFIX=/usr I also tried make clean FPC=/usr/lib/fpc/2.4.3/ppc386 build. The output of make install is attached. Is this wrong? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TReader.ReadProperty
See post from about two weeks ago. Building FPC with debug information On Wed, Nov 3, 2010 at 3:39 AM, Roland Turčan - RoTurSoft i...@rotursoft.sk wrote: On Wed, Nov 3, 2010 at 9:17 AM, Michael Van Canneyt mich...@freepascal.org wrote: PS: How can I debug TReader class, because debuger steps over my calls from TReader. You must recompile the RTL with debug information, and then recompile your project. Thanks for answer, but please could you assist me how to build RTL with debug infos. Thanks. -- Best regards, TRoland http://www.rotursoft.sk ___ fpc-pascal maillist - fpc-pas...@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] MSEide+MSEgui rev.2.4
The fixes_2_4 is already at version 2.4.3 and contains everything from 2.4.2 and more... Thank you. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] MSEide+MSEgui rev.2.4
Which address should I be using? It looks like the UUID and revision are the same while Last changed revision and path are different. svn info http://svn.freepascal.org/svn/fpc/tags/release_2_4_2 Path: release_2_4_2 URL: http://svn.freepascal.org/svn/fpc/tags/release_2_4_2 Repository Root: http://svn.freepascal.org/svn/fpc Repository UUID: 3ad0048d-3df7-0310-abae-a5850022a9f2 Revision: 16285 Node Kind: directory Last Changed Author: marco Last Changed Rev: 16278 Last Changed Date: 2010-10-31 10:08:18 -0700 (Sun, 31 Oct 2010) svn info http://svn.freepascal.org/svn/fpc/branches/fixes_2_4 Path: fixes_2_4 URL: http://svn.freepascal.org/svn/fpc/branches/fixes_2_4 Repository Root: http://svn.freepascal.org/svn/fpc Repository UUID: 3ad0048d-3df7-0310-abae-a5850022a9f2 Revision: 16285 Node Kind: directory Last Changed Author: marco Last Changed Rev: 16277 Last Changed Date: 2010-10-31 10:01:50 -0700 (Sun, 31 Oct 2010) On Mon, Nov 1, 2010 at 7:14 AM, Graeme Geldenhuys graemeg.li...@gmail.com wrote: Op 2010-11-01 15:48, Marcos Douglas het geskryf: If you use the FPC from http://svn.freepascal.org/svn/fpc/branches/fixes_2_4 then the version is 2.4.3, right? Yes, and that works with MSEide too. Regards, - Graeme - -- fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal http://opensoft.homeip.net:8080/fpgui/ ___ fpc-pascal maillist - fpc-pas...@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Re: Re: TPLY
Well, seems like you all have given some material to get me started. As nobody suggested sticking with TPLY or plex/bison I will back-burner that and proceed with crenshaw/oberon. Thanks to everyone. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TPLY
Thanks, I'll look into this as well. On Fri, Oct 29, 2010 at 2:19 AM, Thierry Coq t...@free.fr wrote: Brian, thanks for the diff, I'll take it into account and publish an update. On 28/10/2010 18:50, Brian Winfrey wrote: ... The changes I made in this diff were simply to get it to compile. Subsequently I renamed all files and folders to lowercase, converted spaces to underscores and added a prefix to eliminate duplicate file names where needed. ... Another approach would be to look at (and reverse engineer) the byte code. If it's not obfuscated, it might even be easier to parse and port than the native Java. How would you suggest I proceed in that. Using the class file format (for example here: http://en.wikipedia.org/wiki/Class_%28file_format%29), it would be easy to parse through the tables, identify the class name, its super class name, the interfaces it's implementing, and even the public and private methods. The java compiler has done all the work into translating the java code into nice tables. ;-) I remember I did the exercise once. I've destroyed the code, but I could do it again. I remember one of the more difficult parts was understanding how java coded strings ;-) This was before anonymous classes and methods, so this could be another difficulty. I don't know how these are converted to byte code. Once you have the structure, you can generate the pascal code. I would recommend against generating one class per unit as Java does: since pascal dependency rules are strict (no cycles), this would most certainly result in uncompilable code. What I do when I translate Java is to pre-declare all classes and interfaces at the top of the unit(s) and then generate the full class interface further down. Translating the statements inside the bytecode I haven't tried, since my efforts were mostly for analyzing java code and measuring it. I hope this helps, Thierry ___ fpc-pascal maillist - fpc-pas...@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Re: TPLY
Thank you, What techiniques have you used in the past that you could share to get me started? On Wed, Oct 27, 2010 at 8:04 PM, leledumbo leledumbo_c...@yahoo.co.id wrote: Learn compilation technique, a recursive descent parser should be easy to understand and code instead of learning automatic lexer and parser generator. Plus, structurally, Java is a very simple language, so AST transformation should be easy. With FPC 2.5.1, almost all Java constructs can be directly translated to FPC dialect, minus anonymous inner class only AFAIK. -- View this message in context: http://free-pascal-general.1045716.n5.nabble.com/TPLY-tp3235828p3239905.html Sent from the Free Pascal - General mailing list archive at Nabble.com. ___ fpc-pascal maillist - fpc-pas...@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
[fpc-pascal] TPLY
I recently saw a semi working example of a Java to Delphi converter that was done with javacc. Unfortunately it would only convert simple java (v 1.4 maybe). Can anyone recommend a good place to start reading or offer any advise to accomplish this with TPLY. I am looking into porting some Java libraries to FPC 2.5.x, and am unfamiliar with the TPLY tools. Thanks, Brian ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Building FPC with debug information
make OPT=-O- DEBUG=1 all When I ran this I see that both -dDEBUG and -dRELEASE are passed on the fpc command line. Is that correct? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] IntList
Take a look at http://code.google.com/p/fprb/. I have just perused it, but it looks pretty good. Brian. Currently, the FPC team is looking at an implementation of Vlado Boza us...@ksp.sk for a standard template library for inclusion in FPC. The code is on http://code.google.com/p/stlpascal Please have a look and comment on it. I'm not a generics expert and am not in the position to judge whether this library is good or not. Michael. ___ fpc-pascal maillist - fpc-pas...@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] What are the issues involved in threads sharing variables?
Polling where the list size is highly dynamic you will need protect it. I think FPC has thread safe list objects too. Yes it does, Classes.TThreadList I think. I thought it was a conatiner for threads, but it is a safe list. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
[fpc-pascal] lNet getting the local IP
I didn't try it, but I see that it tries to connect to google's dns serve= r, so it'd fail miserably if the computer has no internet access. Bye -- Luca I tested, without web access does not work. :o A hard coded address will of course fail if it cannot be reached. The code was an example, you should use it as such. I substituted my router's ip for google's and it works.;) Choose a different address that would not fail in a specific situation. As another example, one could read their /etc/resolve file to get the dns server that is assigned. Brian Winfrey ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] lNet getting the local IP
On 06/10/10 14:27, Felipe Monteiro de Carvalho wrote:
Ok, thanks everyone, it seams that I managed to extract a function
from Silvio's code which doesn't use Synapse. I only tested in Windows
so far:
unit chesstcputils;
{$mode objfpc}{$H+}
interface
uses
{$IFDEF MSWINDOWS}
Winsock,
{$ENDIF}
Classes, SysUtils;
function ChessGetLocalIP(): string;
implementation
const
CFormatIPMask = '%d.%d.%d.%d';
function ChessGetLocalIP(): string;
var
I, VAttempt: Integer;
VStrTemp, VSitesToTry: TStringList;
{$IFDEF UNIX}
VProcess: TProcess;
{$ENDIF}
{$IFDEF MSWINDOWS}
var
VWSAData: TWSAData;
VHostEnt: PHostEnt;
VName: string;
{$ENDIF}
begin
Result := '';
{$IFDEF UNIX}
VStrTemp := TStringList.Create;
VProcess := TProcess.Create(nil);
try
VProcess.CommandLine :=
'sh -c ifconfig eth0 | awk ''/inet end/ {print $3}''';
Yuck. This doesn't work on my system (debian). If you really want the
least effort, you may have more luck with simply parsing `hostname -I`
somehow. The right way to do this is with an ioctl, I believe
(SIOCGIFCONF). Look here:
http://www.kernel.org/doc/man-pages/online/pages/man7/netdevice.7.html
I'm sure there's some code floating around, but it probably means that
you have to translate some headers :(.
Henry
Re: [fpc-pascal] lNet getting the local IP
I found an example for linux on stack overflow that was in c
http://stackoverflow.com/questions/212528/linux-c-get-the-ip-address-of-local-computer
- here is a rough translation:
program GetPrimaryIpAddress;
{$mode objfpc}
uses
baseunix,
unixtype,
sockets,
SysUtils;
procedure Get(var buf: array of char; const len: longint);
const
CN_GDNS_ADDR = '8.8.8.8';
CN_GDNS_PORT = 53;
var
s: string;
sock: longint;
err: longint;
HostAddr: TSockAddr;
l: Integer;
UnixAddr: TInetSockAddr;
begin
err := 0;
Assert(len = 16);
sock := fpsocket(AF_INET, SOCK_DGRAM, 0);
assert(sock -1);
UnixAddr.family := AF_INET;
UnixAddr.port := htons(CN_GDNS_PORT);
UnixAddr.addr := StrToHostAddr(CN_GDNS_ADDR).s_addr;
if (fpConnect(sock,@UnixAddr,SizeOf(UnixAddr)) = 0) then
begin
try
l := SizeOf(HostAddr);
if (fpgetsockname(sock, @HostAddr, @l) = 0) then
begin
s := NetAddrToStr(HostAddr.sin_addr);
StrPCopy(PChar(Buf), s);
end
else
begin
err:=socketError;
end;
finally
if (fpclose(sock) 0) then
begin
err := socketError;
end;
end;
end
else
begin
err:=socketError;
end;
if (err 0) then
begin
// report error
end;
end;
var
ipbuf: array[0..255] of char;
begin
system.FillChar(ipbuf, sizeOf(ipBuf), #0);
Get(ipbuf, system.SizeOf(ipbuf));
WriteLn(StrPas(ipbuf));
end.
BrianW
I have tried this code with multiple scenarios.
if interfaces are down, no ip address is returned. I would say that is
expected as there is no network.
ifconfig will return same. only lo has an address 127.0.0.1.
Otherwise I get the primary ip address as long as routing is used.
if connecting to 0.0.0.0, 127.0.0.1 is returned
Use 127.0.0.1 and the primary is returned.
Run some tests and let me know what you find.
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Re: [fpc-pascal] lNet getting the local IP
I think you want to use 127.0.0.1 to return the actual address.
In my case I would
const
CN_GDNS_ADDR = '127.0.0.1';
run the progarm and the output would be 192.168.1.5 as long as there
is an active interface.
On Thu, Oct 7, 2010 at 3:34 PM, silvioprog silviop...@gmail.com wrote:
Hi Brian,
I tested again, and discovered that's not is necessary a connection to a
web.
I changed to 0.0.0.0 and returned 127.0.0.1, perfect! :)
I will use this function. Thanks very much again. :)
2010/10/7 Brian Winfrey bwcod...@gmail.com
On 06/10/10 14:27, Felipe Monteiro de Carvalho wrote:
Ok, thanks everyone, it seams that I managed to extract a function
from Silvio's code which doesn't use Synapse. I only tested in Windows
so far:
unit chesstcputils;
{$mode objfpc}{$H+}
interface
uses
{$IFDEF MSWINDOWS}
Winsock,
{$ENDIF}
Classes, SysUtils;
function ChessGetLocalIP(): string;
implementation
const
CFormatIPMask = '%d.%d.%d.%d';
function ChessGetLocalIP(): string;
var
I, VAttempt: Integer;
VStrTemp, VSitesToTry: TStringList;
{$IFDEF UNIX}
VProcess: TProcess;
{$ENDIF}
{$IFDEF MSWINDOWS}
var
VWSAData: TWSAData;
VHostEnt: PHostEnt;
VName: string;
{$ENDIF}
begin
Result := '';
{$IFDEF UNIX}
VStrTemp := TStringList.Create;
VProcess := TProcess.Create(nil);
try
VProcess.CommandLine :=
'sh -c ifconfig eth0 | awk ''/inet end/ {print $3}''';
Yuck. This doesn't work on my system (debian). If you really want the
least effort, you may have more luck with simply parsing `hostname -I`
somehow. The right way to do this is with an ioctl, I believe
(SIOCGIFCONF). Look here:
http://www.kernel.org/doc/man-pages/online/pages/man7/netdevice.7.html
I'm sure there's some code floating around, but it probably means that
you have to translate some headers :(.
Henry
Re: [fpc-pascal] lNet getting the local IP
I found an example for linux on stack overflow that was in c
http://stackoverflow.com/questions/212528/linux-c-get-the-ip-address-of-local-computer
- here is a rough translation:
program GetPrimaryIpAddress;
{$mode objfpc}
uses
baseunix,
unixtype,
sockets,
SysUtils;
procedure Get(var buf: array of char; const len: longint);
const
CN_GDNS_ADDR = '8.8.8.8';
CN_GDNS_PORT = 53;
var
s: string;
sock: longint;
err: longint;
HostAddr: TSockAddr;
l: Integer;
UnixAddr: TInetSockAddr;
begin
err := 0;
Assert(len = 16);
sock := fpsocket(AF_INET, SOCK_DGRAM, 0);
assert(sock -1);
UnixAddr.family := AF_INET;
UnixAddr.port := htons(CN_GDNS_PORT);
UnixAddr.addr := StrToHostAddr(CN_GDNS_ADDR).s_addr;
if (fpConnect(sock,@UnixAddr,SizeOf(UnixAddr)) = 0) then
begin
try
l := SizeOf(HostAddr);
if (fpgetsockname(sock, @HostAddr, @l) = 0) then
begin
s := NetAddrToStr(HostAddr.sin_addr);
StrPCopy(PChar(Buf), s);
end
else
begin
err:=socketError;
end;
finally
if (fpclose(sock) 0) then
begin
err := socketError;
end;
end;
end
else
begin
err:=socketError;
end;
if (err 0) then
begin
// report error
end;
end;
var
ipbuf: array[0..255] of char;
begin
system.FillChar(ipbuf, sizeOf(ipBuf), #0);
Get(ipbuf, system.SizeOf(ipbuf));
WriteLn(StrPas(ipbuf));
end.
BrianW
I have tried this code with multiple scenarios.
if interfaces are down, no ip address is returned. I would say that is
expected as there is no network.
ifconfig will return same. only lo has an address 127.0.0.1.
Otherwise I get the primary ip address as long as routing is used.
if connecting to 0.0.0.0, 127.0.0.1 is returned
Use 127.0.0.1 and the primary is returned.
Run some tests and let me know what you find.
--
Silvio Clécio,
programmer ObjectPascal
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Re: [fpc-pascal] lNet getting the local IP
I don't know if you noticed, but it appears that code has some
depracated properties that should be changed.
Here are the modifications I made in exploring this issue:
program GetPrimaryIpAddress;
{$mode objfpc}
uses
baseunix,
unixtype,
sockets,
SysUtils;
procedure Get(out AddrOut: string);
const
CN_GDNS_ADDR = '127.0.0.1';
CN_GDNS_PORT = 53;
var
sock: longint;
err: longint;
UnixAddr: TInetSockAddr;
HostAddr: TSockAddr;
len: Integer;
begin
err := 0;
sock := fpsocket(AF_INET, SOCK_DGRAM, 0);
assert(sock -1);
// changed because previous properties were deprecated
UnixAddr.sin_family := AF_INET;
UnixAddr.sin_port := htons(CN_GDNS_PORT);
UnixAddr.sin_addr := StrToHostAddr(CN_GDNS_ADDR);
if (fpConnect(sock, @UnixAddr, SizeOf(UnixAddr)) = 0) then
begin
try
len := SizeOf(HostAddr);
if (fpgetsockname(sock, @HostAddr, @len) = 0) then
begin
AddrOut := NetAddrToStr(HostAddr.sin_addr);
end
else
begin
err:=socketError;
end;
finally
if (fpclose(sock) 0) then
begin
err := socketError;
end;
end;
end
else
begin
err:=socketError;
end;
if (err 0) then
begin
// report error
end;
end;
var
strAddr: string;
begin
Get(strAddr);
WriteLn('ip : ',strAddr);
end.
___
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] lNet getting the local IP
On Wed, Oct 6, 2010 at 7:09 AM, fpc-pascal-requ...@lists.freepascal.org wrote: Send fpc-pascal mailing list submissions to fpc-pas...@lists.freepascal.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.freepascal.org/mailman/listinfo/fpc-pascal or, via email, send a message with subject or body 'help' to fpc-pascal-requ...@lists.freepascal.org You can reach the person managing the list at fpc-pascal-ow...@lists.freepascal.org When replying, please edit your Subject line so it is more specific than Re: Contents of fpc-pascal digest... Today's Topics: 1. Re: GetTempFileName in Linux (Michael Van Canneyt) 2. Re: GetTempFileName in Linux (Jonas Maebe) 3. Re: lNet getting the local IP (Andrew Brunner) 4. Re: lNet getting the local IP (Sven Barth) 5. Re: lNet getting the local IP (Felipe Monteiro de Carvalho) 6. Re: lNet getting the local IP (Andrew Brunner) 7. Re: lNet getting the local IP (Marco van de Voort) 8. Re: lNet getting the local IP (Henry Vermaak) -- Message: 1 Date: Wed, 6 Oct 2010 11:59:53 +0200 (CEST) From: Michael Van Canneyt mich...@freepascal.org Subject: Re: [fpc-pascal] GetTempFileName in Linux To: FPC-Pascal users discussions fpc-pascal@lists.freepascal.org Message-ID: alpine.deb.2.00.1010061158450.6...@fsb.wals.be Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed On Wed, 6 Oct 2010, Jonas Maebe wrote: On 06 Oct 2010, at 11:05, Michael Van Canneyt wrote: On Wed, 6 Oct 2010, Jonas Maebe wrote: On 06 Oct 2010, at 09:41, Michael Van Canneyt wrote: This is always true on Unix, the only way to make sure is to have the kernel create the temporary name and file for you. Unix - to my knowledge - does not have a way to create and lock a file in one atomic operation; There are always 2 operations involved, and so anything can happen between the 2 calls. You can at least open a file with O_CREAT|O_EXCL|O_NOFOLLOW to make sure that it does not yet exist at the point that you create it (and that it's not a symlink either). This is correct, but doesn't lock the file, Locking is always advisory on Unix, so that doesn't matter anyway. and so it doesn't prevent someone from 'stealing' the file before the lock is applied. Nobody else can steal the file once you have created it, because they won't be the owner nor have the necessary permissions. That is the main security risk and it is solved by this approach. The fact that another process running under your login not using O_EXCL could overwrite it is not an extra security risk (if you have a rogue process running under your login, nothing that you do is safe because it can use ptrace to modify any process in any way it sees fit anyway). And that is why I think the whole point is hugely exaggerated :-) But it doesn't mean we shouldn't do our best to make it minimally safe. Michael. -- Message: 2 Date: Wed, 6 Oct 2010 12:57:02 +0200 From: Jonas Maebe jonas.ma...@elis.ugent.be Subject: Re: [fpc-pascal] GetTempFileName in Linux To: FPC-Pascal users discussions fpc-pascal@lists.freepascal.org Message-ID: 6cd7d25a-fd10-4c7d-9011-da47560af...@elis.ugent.be Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes On 06 Oct 2010, at 11:59, Michael Van Canneyt wrote: On Wed, 6 Oct 2010, Jonas Maebe wrote: Nobody else can steal the file once you have created it, because they won't be the owner nor have the necessary permissions. That is the main security risk and it is solved by this approach. The fact that another process running under your login not using O_EXCL could overwrite it is not an extra security risk (if you have a rogue process running under your login, nothing that you do is safe because it can use ptrace to modify any process in any way it sees fit anyway). And that is why I think the whole point is hugely exaggerated :-) It's not, because currently a process from *another* user can trivially intercept your temporary files. If you have a daemon running as root, that is a major security concern. Jonas -- Message: 3 Date: Wed, 6 Oct 2010 07:49:42 -0500 From: Andrew Brunner andrew.t.brun...@gmail.com Subject: Re: [fpc-pascal] lNet getting the local IP To: FPC-Pascal users discussions fpc-pascal@lists.freepascal.org Message-ID: aanlktinkfgmjmfkls=tww+sorr3jmkj4zjul7z6zr...@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1 I just read the first line in /etc/hosts file. The first entry is the IPv4. On Tue, Oct 5, 2010 at 3:04 PM, Felipe Monteiro de Carvalho felipemonteiro.carva...@gmail.com wrote: hello, I am searching for a way to get the local IP. I already found examples with winsock, synapse and indy. Does anyone know how to do that with lNet? thanks, -- Felipe Monteiro de Carvalho
[fpc-pascal] Destroy vs Free: Memory Leak?
I have a TestCase that has this issue. If I call obj.Free, I am unable to step into the Destroy method and heaptrc indicates a memory leak. If I call obj.Destroy everything works as expected. Following the call to Free - ... if (obj nil) then obj.Destroy; it would seem that the object must be nil. How can I test this? i am unable to step into objpas?.inc. Thanks, Brian. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
