/*
 * 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved  */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <pwd.h>
#include <auth_attr.h>
#include <auth_list.h>

#include "cron.h"

struct stat globstat;
#define exists(file)    (stat(file, &globstat) == 0)
#define ROOT    "root"

int per_errno;  /* status info from getuser */
static int within(char *, char *);


char *
getuser(uid_t uid)
{
        struct passwd *nptr;

        if ((nptr = getpwuid(uid)) == NULL) {
                per_errno = 1;
                return (NULL);
        }
        if ((strcmp(nptr->pw_shell, SHELL) != 0) &&
            (strcmp(nptr->pw_shell, "") != 0)) {
                per_errno = 2;
                /*
                 * return NULL if you want crontab and at to abort
                 * when the users login shell is not /usr/bin/sh otherwise
                 * return pw_name
                 */
                return (nptr->pw_name);
        }
        return (nptr->pw_name);
}

int
allowed(char *user, char *allow, char *deny)
{
        if (exists(allow)) {
                if (within(user, allow)) {
                        return (1);
                } else {
                        return (0);
                }
        } else if (exists(deny)) {
                if (within(user, deny)) {
                        return (0);
                } else {
                        return (1);
                }
        } else if (chkauthattr(CRONUSER_AUTH, user)) {
                return (1);
        } else {
                return (0);
        }
}

static int
within(char *username, char *filename)
{
        char line[UNAMESIZE];
        FILE *cap;
        int i;

        if ((cap = fopen(filename, "r")) == NULL)
                return (0);
        while (fgets(line, UNAMESIZE, cap) != NULL) {
                for (i = 0; line[i] != '\0'; i++) {
                        if (isspace(line[i])) {
                                line[i] = '\0';
                                break; }
                }
                if (strcmp(line, username) == 0) {
                        fclose(cap);
                        return (1);
                }
        }
        fclose(cap);
        return (0);
}

int
cron_admin(const char *name)
{
        return (chkauthattr(CRONADMIN_AUTH, name));
}