Re: deliver full path by argv[0] and GetCommandLine for win9x

[Juan Lang]

Okay, here's a test program:
#include <windows.h>
#include <stdio.h>

int main(int argc, const char *argv[])
{
    LPCSTR cmd;

    printf("argv[0] is %s\n", argv[0]);
    cmd = GetCommandLineA();
    printf("GetCommandLine returns %s\n", cmd);
    return strcmp(argv[0], cmd);
}

Under Windows 2000, cmd.exe, run from the current
directory, I get:
argv[0] is cmdlinetest.exe
GetCommandLine returns cmdlinetest.exe

Under Windows 2000, command.com, run from the current
directory, I get:
argv[0] is CMDLIN~1.exe
GetCommandLine returns CMDLIN~1.exe

Under Windows 2000, run from the debugger, I get:
argv[0] is c:\src\cmdlinetest\Debug\cmdlinetest.exe
GetCommandLineA returns
"c:\src\cmdlinetest\Debug\cmdlinetest.exe"
(This case is interesting because it shows argv[0] and
GetCommandLineA can be different even without
arguments.)

Under Windows ME, command.com, run from the current
directory, I get:
argv[0] is C:\SRC\CMDLIN~1\DEBUG\CMDLIN~1.EXE
GetCommandLine returns
C:\SRC\CMDLIN~1\DEBUG\CMDLIN~1.EXE

This is the same executable, so it isn't a different
_CRTMainStartup.  I think this supports Frank's
assertion.

--Juan

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deliver full path by argv[0] and GetCommandLine for win9x

[Alexandre Julliard]

Juan Lang <juan_lang(a)yahoo.com> writes:
> This is the same executable, so it isn't a different
> _CRTMainStartup.  I think this supports Frank's
> assertion.

No, the interesting case is what happens with CreateProcess. Launching
the app from cmd.exe doesn't tell you anything, because you don't know
exactly what arguments cmd.exe passed to CreateProcess.

-- 
Alexandre Julliard
julliard(a)winehq.com

deliver full path by argv[0] and GetCommandLine for win9x

[Juan Lang]

--- Alexandre Julliard <julliard(a)winehq.com> wrote:
> No, the interesting case is what happens with
> CreateProcess. Launching
> the app from cmd.exe doesn't tell you anything,
> because you don't know
> exactly what arguments cmd.exe passed to
> CreateProcess.

You're right, as usual :)

I created another test case:
#include <windows.h>
#include <stdio.h>

int main(int argc, const char *argv[])
{
    if (argc <= 1)
    {
        PROCESS_INFORMATION procInfo;
        STARTUPINFO startInfo;

        memset(&startInfo, 0, sizeof(startInfo));
        startInfo.cb = sizeof(startInfo);
        if (CreateProcessA(NULL, "cmdlinetest.exe 1",
NULL, NULL, FALSE,
         0, NULL, NULL, &startInfo, &procInfo))
        {
            CloseHandle(procInfo.hProcess);
            CloseHandle(procInfo.hThread);
        }
    }
    else
    {
        LPCSTR cmd;

        printf("argv[0] is %s\n", argv[0]);
        cmd = GetCommandLineA();
        printf("GetCommandLine returns %s\n", cmd);
    }
    return 0;
}

With this, the output under win9x is:
argv[0] is cmdlinetest.exe
GetCommandLine returns cmdlinetest.exe 1

So, Frank, sorry, this isn't the way GetCommandLine
actually behaves under Win9x.
--Juan

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