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Message-ID: <41B839E2.5020803@mff.cuni.cz>
Date: Thu, 09 Dec 2004 12:41:22 +0100
From: Pavel Kudrna <Pavel DOT Kudrna AT mff DOT cuni DOT cz>
Organization: Charles University in Prague, Faculty of Mathematics and Physics
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040616
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Incorrectly prepared lpCmdLine parameter of WinMain()
Content-Type: text/plain; charset=ISO-8859-2; format=flowed
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The caller of WinMain() incorrectly parses the command line if e.g.
the space is present in the path or filename of the executable.
The lpCmdLine then contains part of the filename at the beginning.

/* program.c*/
#include <windows.h>
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, 
LPSTR lpCmdLine, int nCmdShow )
{
  MessageBox(NULL, lpCmdLine, "lpCmdLine:", MB_OK );
  return 0;
}

$ gcc program.c -mwin32
$ mv a.exe "a a.exe"
$ "./a a.exe" "1st parameter" 2nd\ parameter

Then MessageBox shows that lpCmdLine contains:
a.exe" "1st parameter" "2nd parameter"

If program is compiled with -mno-cygwin the bug is not present and 
lpCmdLine is ok:
"1st parameter" "2nd parameter"

Pavel Kudrna


Cygwin Configuration Diagnostics
Current System Time: Thu Dec 09 10:50:59 2004
Windows XP Professional Ver 5.1 Build 2600 Service Pack 2

Cygwin DLL version info:
DLL version: 1.5.12    DLL epoch: 19
...
Cygwin Package Information
base-files           3.1-4
binutils             20040725-2
cygutils             1.2.5-1
cygwin               1.5.12-1
gcc                  3.3.3-3
gcc-mingw            20040810-1
mingw-runtime        3.5-1
w32api               3.1-1

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