/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * Copyright 2015 PALO, Richard
 *
 * Copyright (c) 2018, Joyent, Inc.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "list.h"
#include "exception_list.h"
#include "arch.h"

/*
 * This is global so that the protodir reading functions can rely on the
 * exception list to weed out innocuous problems in the IHV gate.
 */
elem_list exception_list;

#define FS      " \t\n"

static int
parse_exception_line(char *line, elem_list *list)
{
        char    *name, *arch;
        elem    *e;

        if ((name = strtok(line, FS)) == NULL) {
                /* don't complain; this is only a blank line */
                return (0);
        }

        if ((arch = strtok(NULL, FS)) == NULL) {
                arch = "all";
        }

        e = (elem *) malloc(sizeof (elem));
        if (e == NULL) {
                perror("malloc");
                exit(1);
        }

        e->inode = 0;
        e->perm = 0;
        e->ref_cnt = 0;
        e->flag = 0;
        e->major = 0;
        e->minor = 0;
        e->link_parent = NULL;
        e->link_sib = NULL;
        e->symsrc = NULL;
        e->file_type = DIR_T;

        while ((e->arch = assign_arch(arch)) == 0) {
                if ((arch = strtok(NULL, FS)) == NULL) {
                        free(e);
                        return (0);
                }
        }

        (void) strcpy(e->name, name);
        add_elem(list, e);

        return (1);
}

int
read_in_exceptions(const char *exception_file, int verbose)
{
        FILE    *except_fp;
        char    buf[BUFSIZ];
        int     count = 0;

        exception_file = exception_file ? exception_file : EXCEPTION_FILE;

        if (verbose) {
                (void) printf("reading in exceptions from %s...\n",
                    exception_file);
        }

        if ((except_fp = fopen(exception_file, "r")) == NULL) {
                perror(exception_file);
                return (0);
        }
        while (fgets(buf, BUFSIZ, except_fp)) {
                if (buf[0] != '#')      /* allow for comments */
                        count += parse_exception_line(buf, &exception_list);
        }
        if (verbose)
                (void) printf("read in %d exceptions...\n", count);

        return (count);
}