Calling external programs from D

[Tydr Schnubbis]

Regan Heath wrote:
> On Wed, 19 Apr 2006 03:57:44 +0200, Tydr Schnubbis <fake at address.dude>  
> wrote:
>> Tydr Schnubbis wrote:
>>> Regan Heath wrote:
>>>> On Thu, 6 Apr 2006 14:46:09 +0000 (UTC), Stuart Delaney   
>>>> <Stuart_member at pathlink.com> wrote:
>>>>> There's a bug in the makeBlock functions in process.d. The first   
>>>>> parameter to
>>>>> calloc should be 1 not 0. With that change (and the private readLine   
>>>>> one) it
>>>>> works fine for me.  Don't have an answer to the OP's DNS problem  
>>>>> though.
>>>>  You're dead right. With those changes it works for me too.
>>>  I've fixed the calloc calls too, but it doesn't help.  If I try to  
>>> ping google's IP, which is 64.233.167.99 according to ping, I get  
>>> "Pinging Error: 4invalid UTF-8 sequence".  Maybe my windows  
>>> installation is screwed, it's getting really old...
>>>  Btw, I use dmd 0.148, haven't tried this with any other version yet.
>> Could it be that CreateProcessA is used wrong somehow?  I don't know the  
>> win32 api, but does anyone know if using it wrong (security settings or  
>> sth) could block new process from accessing the network?  Where would I  
>> start looking if I want to fix this?  The msdn docs didn't help much.  
>> Couldn't even find mention of this function, only CreateProcess, without  
>> the trailing 'A'.  But it seems to be the same function.
>>
>> Here's what the call looks like:
>> CreateProcessA(null,std.string.toStringz(command),null,null,true,DETACHED_PROCESS,env,null,&startup,info)
> 
> CreateProcessA is the ascii version.
> CreateProcessW is the unicode (UTF-16) version.
> 
> std.string.toStringz converts the UTF-8 char[] into ascii
> std.string.toUTF16 can be used to convert the UTF-8 char[] into UTF-16 if  
> you want to call CreateProcessW instead.
> 
> The common cause of the "4invalid UTF-8 sequence" error is trying to  
> output non-ascii characters to the windows console. Can you post your  
> current code here.

Sure.  As you can see it's full of weird characters...

import lib.process;
import std.stdio;

void main()
{
	Process proc;
	// ping my router
	proc = new Process("ping 192.168.0.1");
	writefln(proc.readLine());
	writefln(proc.readLine());
	writefln(proc.readLine());
	writefln(proc.readLine());
}


I have only made readLine public, and fixed the four calloc calls, no 
other changes have been made to your files.

Compile with: dmd test.d lib/process.d lib/pipestream.d

This prints:
Pinging Error: 4invalid UTF-8 sequence


If I ping google.com instead, I get this:
Ping request could not find host google.com. Please check the name and 
try again
.

Error: ReadFile: The pipe has been ended.

---------

Does both of these work for you?  I have no idea what would cause any of 
these problems.  I have winxp SP2 US.  CreateProcessA is in 
kernel32.dll, of which I have version 5.1.2600.2180 
(xpsp_sp2_rtm.040803-2158).  dmd version 0.154, got the same results 
with 0.148.

:/