usr/src/usr.bin/pascal/libpc/PFCLOSE.c

/*-
 * Copyright (c) 1982 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)PFCLOSE.c   1.4 (Berkeley) 4/9/90";
#endif /* not lint */

/*
 * Close a Pascal file deallocating resources as appropriate.
 */

#include "h00vars.h"
#include "libpc.h"

struct iorec *
PFCLOSE(filep, lastuse)
        register struct iorec *filep;
        bool lastuse;
{
        if ((filep->funit & FDEF) == 0 && filep->fbuf != NULL) {
                /*
                 * Have a previous buffer, close associated file.
                 */
                if (filep->fblk > PREDEF) {
                        fflush(filep->fbuf);
                        setbuf(filep->fbuf, NULL);
                }
                fclose(filep->fbuf);
                if (ferror(filep->fbuf)) {
                        ERROR("%s: Close failed\n", filep->pfname);
                        return;
                }
                /*
                 * Temporary files are discarded.
                 */
                if ((filep->funit & TEMP) != 0 && lastuse &&
                    unlink(filep->pfname)) {
                        PERROR("Could not remove ", filep->pfname);
                        return;
                }
        }
        _actfile[filep->fblk] = FILNIL;
        return (filep->fchain);
}