open_output
ofd = open_output(out, &error, &oreg);
ofd = open_output(out, &error, &oreg);
open_output(infile, outfilename);
open_output(infile, outfilename);
open_output(infile, outfilename);
open_output(infile, outfilename);
open_output(infile, outfilename);
open_output(infile, outfilename);
open_output(infile, outfilename);