1/* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements.  See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License.  You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "pod.h"
18
19#if APR_HAVE_UNISTD_H
20#include <unistd.h>
21#endif
22
23AP_DECLARE(apr_status_t) ap_mpm_pod_open(apr_pool_t * p, ap_pod_t ** pod)
24{
25    apr_status_t rv;
26
27    *pod = apr_palloc(p, sizeof(**pod));
28    rv = apr_file_pipe_create(&((*pod)->pod_in), &((*pod)->pod_out), p);
29    if (rv != APR_SUCCESS) {
30        return rv;
31    }
32/*
33    apr_file_pipe_timeout_set((*pod)->pod_in, 0);
34*/
35    (*pod)->p = p;
36
37    /* close these before exec. */
38    apr_file_inherit_unset((*pod)->pod_in);
39    apr_file_inherit_unset((*pod)->pod_out);
40
41    return APR_SUCCESS;
42}
43
44AP_DECLARE(int) ap_mpm_pod_check(ap_pod_t * pod)
45{
46    char c;
47    apr_os_file_t fd;
48    int rc;
49
50    /* we need to surface EINTR so we'll have to grab the
51     * native file descriptor and do the OS read() ourselves
52     */
53    apr_os_file_get(&fd, pod->pod_in);
54    rc = read(fd, &c, 1);
55    if (rc == 1) {
56        switch (c) {
57        case RESTART_CHAR:
58            return AP_RESTART;
59        case GRACEFUL_CHAR:
60            return AP_GRACEFUL;
61        }
62    }
63    return AP_NORESTART;
64}
65
66AP_DECLARE(apr_status_t) ap_mpm_pod_close(ap_pod_t * pod)
67{
68    apr_status_t rv;
69
70    rv = apr_file_close(pod->pod_out);
71    if (rv != APR_SUCCESS) {
72        return rv;
73    }
74
75    rv = apr_file_close(pod->pod_in);
76    if (rv != APR_SUCCESS) {
77        return rv;
78    }
79    return rv;
80}
81
82static apr_status_t pod_signal_internal(ap_pod_t * pod, int graceful)
83{
84    apr_status_t rv;
85    char char_of_death = graceful ? GRACEFUL_CHAR : RESTART_CHAR;
86    apr_size_t one = 1;
87
88    rv = apr_file_write(pod->pod_out, &char_of_death, &one);
89    if (rv != APR_SUCCESS) {
90        ap_log_error(APLOG_MARK, APLOG_WARNING, rv, ap_server_conf,
91                     "write pipe_of_death");
92    }
93    return rv;
94}
95
96AP_DECLARE(apr_status_t) ap_mpm_pod_signal(ap_pod_t * pod, int graceful)
97{
98    return pod_signal_internal(pod, graceful);
99}
100
101AP_DECLARE(void) ap_mpm_pod_killpg(ap_pod_t * pod, int num, int graceful)
102{
103    int i;
104    apr_status_t rv = APR_SUCCESS;
105
106    for (i = 0; i < num && rv == APR_SUCCESS; i++) {
107        rv = pod_signal_internal(pod, graceful);
108    }
109}
110