/* Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <assert.h>

#include <apr_strings.h>

#ifndef AP_ENABLE_EXCEPTION_HOOK

#define AP_ENABLE_EXCEPTION_HOOK 0

#endif

#include <mpm_common.h>

#include <httpd.h>

#include <http_log.h>

#include <ap_mpm.h>

#if APR_HAVE_UNISTD_H

#include <unistd.h>

#endif

#ifdef WIN32

#include "mpm_winnt.h"

#endif

#if AP_NEED_SET_MUTEX_PERMS

#include "unixd.h"

#endif

#include "md_util.h"

#include "mod_md_os.h"

apr_status_t md_try_chown(const char *fname, unsigned int uid, int gid, apr_pool_t *p)

{

#if AP_NEED_SET_MUTEX_PERMS && HAVE_UNISTD_H

    /* Since we only switch user when running as root, we only need to chown directories

     * in that case. Otherwise, the server will ignore any "user/group" directives and

     * child processes have the same privileges as the parent.

     */

    if (!geteuid()) {

        if (-1 == chown(fname, (uid_t)uid, (gid_t)gid)) {

            apr_status_t rv = APR_FROM_OS_ERROR(errno);

            if (!APR_STATUS_IS_ENOENT(rv)) {

                ap_log_perror(APLOG_MARK, APLOG_ERR, rv, p, APLOGNO(10082)

                              "Can't change owner of %s", fname);

            }

            return rv;

        }

    }

    return APR_SUCCESS;

#else 

    return APR_ENOTIMPL;

#endif

}

apr_status_t md_make_worker_accessible(const char *fname, apr_pool_t *p)

{

    return md_try_chown(fname, ap_unixd_config.user_id, -1, p);

}

#ifdef WIN32

apr_status_t md_server_graceful(apr_pool_t *p, server_rec *s)

{

    return APR_ENOTIMPL;

}

#else

apr_status_t md_server_graceful(apr_pool_t *p, server_rec *s)

{ 

    apr_status_t rv;

    (void)p;

    (void)s;

    rv = (kill(getppid(), AP_SIG_GRACEFUL) < 0)? APR_ENOTIMPL : APR_SUCCESS;

    ap_log_error(APLOG_MARK, APLOG_TRACE1, errno, NULL, "sent signal to parent");

    return rv;

}

#endif