[Ace-users] [ace-users] Pipes on Win32 and Unix

[Douglas C. Schmidt]

Hi,

        Please take a look at
        
ACE_ROOT/tests/Pipe_Test.cpp
ACE_ROOT/examples/OS/Process        

for some examples of using ACE_Pipe that are similar to what you're
trying to do below.

Thanks,

        Doug

>Could anyone advise me how to make this code to run exactly the same
>on both Win32 and Unix ?
>
>==========
>Main program:
>
>int ACE_TMAIN (int argc, ACE_TCHAR *argv[])
>{
>		ACE_Process nmproc;
>		ACE_Process_Options nm_opts;
>		nm_opts.command_line("testEcho");
>
>		ACE_HANDLE pipe[2];
> 		ACE_OS::pipe(pipe);
>		nm_opts.set_handles(pipe[0]);
>		ACE_OS::close(pipe[0]);
>		nmproc.spawn(nm_opts);
>		ACE_OS::write(pipe[1], "aa\n", 2);
>		nm_opts.release_handles();
>		ACE_OS::close(pipe[1]);
>		return 0;
>}
>
>==========
>testEcho program:
>
>int main(int argc, char* argv[])
>{
>	printf("TestEcho started\n");
>	char buf[100];
>	scanf("%s", buf);
>	fprintf(stdout, "StdOut:%s\n", buf);
>	fprintf(stderr, "StdErr:%s\n", buf);
>
>	return 0;
>}
>
>
>==========
>On Win32 I got the following:
> after a call to "ACE_OS::close(pipe[1]);", the testEcho is closed
>immidiately and the output is :
>TestEcho started
>StdOut:aa
>StdErr:aa
>
>But when I run this code on Linux, testEcho is never terminated, and
>the output is only:
>TestEcho started
>
>Please help.


-- 
Dr. Douglas C. Schmidt                       Professor and Associate Chair
Electrical Engineering and Computer Science  TEL: (615) 343-8197
Vanderbilt University                        WEB: www.dre.vanderbilt.edu/~schmidt
Nashville, TN 37203                          NET: d.schmidt at vanderbilt.edu