I'm trying to do 3 things:

1.  Open a pipe to "mysql -fs" and write to it using << operators:

I can't figure out how to use popen() and stuff to get an ostream out of that process.
i.e.
FILE *mysql;
mysql = popen("mysql -fs", "w");
/* Where to go now? */

2.  Open a file "carma.log" to write to using <<.  How do I do this?
FILE *logfile
logfile = fopen("carma.log", "w");
/* Now what?*/

3.  Re-direct stdout (I've got this down...)

any suggestions?
Thanks
MWB.

Disclaimer:
Beware: Studies have shown that research causes cancer in lab rats.

MWB,

I don't have current access to a UNIX box at the moment so I can only say that you need to create objects from the 'stream' library to perform '<< and >>' style IO.

There are old 'standard stream' libraries but the most current stream objects are in the STL.

Good luck
-pete

yeah, I just can't figure how to redirect a pipe opened, as in example 1, and then use the stream ops.  Also, in example 2...

Disclaimer:
Beware: Studies have shown that research causes cancer in lab rats.

mbaranski, have you figured anything out with pipes?  I found pfstream.h is useful, however in my case, the author of a program i want to pipe from uses stderr instead of stderr.  Have you found any other ways to pipe, I'm looking for one. Thanks

Here is a sample to work with a pipe. This sample looks, if a program is already running and returns the number of running programs.
But you can write as well to a pipe like to a file.

int send_emsgs_already_running ()
{
    FILE *fps;
    const char *ps = "ps -e|grep iaksend_emsgs";
    char pspid[10],    pstty[15], pstime[10], pscmd[300];
    int rc = 0;
    int frc = 0;
    
    fps = popen (ps, "r");
    if (fps == NULL)
    {
            Errorhandling...
            return -1;
    }
    while (frc != EOF)
    {
        strcpy ((char *)pscmd, "");
        frc = fscanf (fps, "%s %s %s %s", pspid, pstty, pstime, pscmd);
        if (strlen (pscmd))
        {
//            printf ("Found programs: %s %s %s \n", pspid, pstty, pstime, pscmd);
            if (! strcmp ((char *)pscmd, "iaksend_emsgs"))
            {
                rc += 1;
            }
        }
    }
    pclose (fps);
    return rc;
}



A link where you can find more information about pipes:
http://www.cs.cf.ac.uk/Dave/C/node23.html#SECTION002300000000000000000

Hope that helps    Arno