No subject

	pstrcpy(print_directory, pjob->filename);
	p = strrchr(print_directory,'/');
	if (!p)
		return 0;
	*p++ = 0;

	if (chdir(print_directory) != 0)
		return 0;

	pstrcpy(jobname, pjob->jobname);
	pstring_sub(jobname, "'", "_");
	slprintf(job_page_count, sizeof(job_page_count)-1, "%d",
pjob->page_count);
	slprintf(job_size, sizeof(job_size)-1, "%d", pjob->size);

	/* send it to the system spooler */
	ret = print_run_command(snum, 
			  lp_printcommand(snum), NULL,
			  "%s", p,
  			  "%J", jobname,
			  "%f", p,
			  "%z", job_size,
			  "%c", job_page_count,
			  NULL);

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I'm confused about what %J holds.