lib/filters/getfilter.c

	getfilter.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*    All Rights Reserved   */


#ident  "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.6   */
/* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */

#include "errno.h"
#include "string.h"
#include "stdlib.h"

#include "lp.h"
#include "filters.h"

/**
 ** getfilter() - GET FILTER FROM FILTER TABLE
 **/

FILTER *
#if defined(__STDC__)
getfilter (
    char *          name
)
#else
getfilter (name)
    char            *name;
#endif
{
    static _FILTER      *pf = 0;

    static FILTER       flbuf;


    if (!name || !*name) {
        errno = EINVAL;
        return (0);
    }

    /*
     * Don't need to check for ENOENT, because if it is set,
     * well that's what we want to return anyway!
     */
    if (!filters && get_and_load() == -1 /* && errno != ENOENT */ )
        return (0);

    if (STREQU(NAME_ALL, name))
        if (pf) {
            if (!(++pf)->name)
                pf = 0;
        } else
            pf = filters;
    else
        pf = search_filter(name);

    if (!pf || !pf->name) {
        errno = ENOENT;
        return (0);
    }

    flbuf.name = Strdup(pf->name);
    flbuf.command = (pf->command? Strdup(pf->command) : 0);
    flbuf.type = pf->type;
    flbuf.printer_types = typel_to_sl(pf->printer_types);
    flbuf.printers = duplist(pf->printers);
    flbuf.input_types = typel_to_sl(pf->input_types);
    flbuf.output_types = typel_to_sl(pf->output_types);
    flbuf.templates = templatel_to_sl(pf->templates);

    /*
     * Make sure a subsequent ``all'' query starts getting
     * filters from the beginning.
     */
    if (!STREQU(NAME_ALL, name))
        pf = 0;

    return (&flbuf);
}