Re: Neater way of preparing call to system()

On Mon, 2008-11-17 at 15:02 +0100, Olsson Erik wrote:

I need to issue a CPYF using system() that would look something like this
from RPG:

cmdstring = 'CPYF FROMFILE(MYLIB/MYFILE) TOFILE+
(FTPLIB/FILEX) FROMMBR(' + %trimr(pmbr) +') +
TOMBR(' + %trimr(pmbr) + ') MBROPT(*REPLACE) FMTOPT(*NOCHK)';

That is, the command is hard coded except for the member names, which can be
anywhere between 2 and 10 bytes.
Does anyone have any good suggestions for a C/C++ equivalent? The best I can
come up with at present includes a lot of inserts and appends and would take
several lines.

Thanks,
Erik

Erik,

You might want to us sprintf() for pasting together the parts of your
command. Something like ...

#include <stdio.h>

int
main( int argc, char * argv[] )
{
char pmbr[] = "THING";
char cmdstring[256];
int written;
written =
sprintf( cmdstring
, "CPYF FROMFILE(MYLIB/MYFILE) TOFILE(FTPLIB/FILEX) "
"FROMMBR(%s) TOMBR(%s) MBROPT(*REPLACE) "
"FMTOPT(*NOCHK)"
, pmbr, pmbr );
printf( "command string, of length %i, is ...\n %s\n"
, written, cmdstring );
return 0;
} /* main() */

Cheers,
Terry.