Re: CreateProcess

Shajan — Tue, 17 Mar 2009 20:01:01 GMT

// Do paste your code if you don't mind sharing it... The part where the process is launched, and the part where you verify the working directory in the child process.

// I tried it out, the API does work as described.. compile and run the code below, producing test.exe, then run it.. It launches another instance of test.exe using createprocess..

#include <windows.h>
#include <stdio.h>

#define MODULE "Test.exe"
void PrintErrorMsg(const char* strFunction, long err);

int main(int argc, char* argv[])
{
char folder[MAX_PATH];

    //
    // Note argv[0] is always the current command line
    //
    if (argc == 1)
    {
        printf("Usage : " MODULE " path\n");
        printf("Example\n\t" MODULE " c:\\windows\n");
    }

    //
    // Single argument implies child process, launch child process
    //
    if (argc == 2)
    {
        // Launch the child process
        if (GetCurrentDirectoryA(MAX_PATH, folder))
            printf("Parent process current dir : %s\n", folder);
        else
        {
            PrintErrorMsg("GetCurrentDirectory", GetLastError());
            return 1;
        }

printf("Creating child process with current dir : %s\n", argv[1]);

        STARTUPINFOA si = {0};
        PROCESS_INFORMATION pi = {0};
        memset(&si, sizeof(STARTUPINFO), 0);
        memset(&pi, sizeof(pi), 0);
        si.cb = sizeof(STARTUPINFO);

        // Now create Process, add 2 dummy arguments
        if (!CreateProcessA(NULL, MODULE " 1 2", NULL, NULL, FALSE, 0, NULL,
                argv[1], &si, &pi))
        {
            PrintErrorMsg("CreateProcess", GetLastError());
            return 1;
        }
    }

    //
    // Two arguments implies child process
    //
    if (argc == 3)
    {
        // Child process, print current directory
        if (GetCurrentDirectoryA(MAX_PATH, folder))
            printf("Child process current dir : %s\n", folder);
        else
        {
            PrintErrorMsg("GetCurrentDirectory", GetLastError());
            return 1;
        }
    }

return 0;
}

void PrintErrorMsg(const char* strFunction, long err)
{
char errStr[MAX_PATH];

FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0,
errStr, MAX_PATH, NULL);

printf("Error %s %d : %s\n", strFunction, err, errStr);
}

-Shajan

This posting is provided “AS IS” with no warranties and confers no rights.

Re: CreateProcess

premith — Tue, 17 Mar 2009 15:34:34 GMT

i dint get any errors as such

the program launched succesfuly but the working directory part was not correct

btw guys i must say this is a active group

cheers

keep up the good work :)

Re: CreateProcess

NinethSense — Tue, 17 Mar 2009 15:25:10 GMT

Do you get any error?

LPTSTR szCmdline = _tcsdup(TEXT("C:\\Program Files\\MyApp -L -S"));
CreateProcess(NULL, szCmdline, /* ... */);

Re: CreateProcess

Anuraj — Tue, 17 Mar 2009 15:18:29 GMT

Did you gone through this link?

http://www.goffconcepts.com/techarticles/development/cpp/createprocess.html

CreateProcess

premith — Tue, 17 Mar 2009 14:55:48 GMT

how do we use Createprocess API to spawn a process with the working directory set as the one we need.

I tried with the lpCurrentDirectory parameter in the CreateProcess.

Ne help would be appreciated.

Microsoft Technologies

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