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/* 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 "apr.h"
#include "apr_arch_misc.h"
#include "apr_arch_threadproc.h"
#include "apr_arch_file_io.h"
#if APR_HAS_OTHER_CHILD
#ifdef HAVE_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if APR_HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#ifdef BEOS
#include <sys/socket.h> /* for fd_set definition! */
#endif
static apr_other_child_rec_t *other_children = NULL;
static apr_status_t other_child_cleanup(void *data)
{
apr_other_child_rec_t **pocr, *nocr;
for (pocr = &other_children; *pocr; pocr = &(*pocr)->next) {
if ((*pocr)->data == data) {
nocr = (*pocr)->next;
(*(*pocr)->maintenance) (APR_OC_REASON_UNREGISTER, (*pocr)->data, -1);
*pocr = nocr;
/* XXX: um, well we've just wasted some space in pconf ? */
return APR_SUCCESS;
}
}
return APR_SUCCESS;
}
APR_DECLARE(void) apr_proc_other_child_register(apr_proc_t *proc,
void (*maintenance) (int reason, void *, int status),
void *data, apr_file_t *write_fd, apr_pool_t *p)
{
apr_other_child_rec_t *ocr;
ocr = apr_palloc(p, sizeof(*ocr));
ocr->p = p;
ocr->proc = proc;
ocr->maintenance = maintenance;
ocr->data = data;
if (write_fd == NULL) {
ocr->write_fd = (apr_os_file_t) -1;
}
else {
#ifdef WIN32
/* This should either go away as part of eliminating apr_proc_probe_writable_fds
* or write_fd should point to an apr_file_t
*/
ocr->write_fd = write_fd->filehand;
#else
ocr->write_fd = write_fd->filedes;
#endif
}
ocr->next = other_children;
other_children = ocr;
apr_pool_cleanup_register(p, ocr->data, other_child_cleanup,
apr_pool_cleanup_null);
}
APR_DECLARE(void) apr_proc_other_child_unregister(void *data)
{
apr_other_child_rec_t *cur;
cur = other_children;
while (cur) {
if (cur->data == data) {
break;
}
cur = cur->next;
}
/* segfault if this function called with invalid parm */
apr_pool_cleanup_kill(cur->p, cur->data, other_child_cleanup);
other_child_cleanup(data);
}
APR_DECLARE(apr_status_t) apr_proc_other_child_alert(apr_proc_t *proc,
int reason,
int status)
{
apr_other_child_rec_t *ocr, *nocr;
for (ocr = other_children; ocr; ocr = nocr) {
nocr = ocr->next;
if (ocr->proc->pid != proc->pid)
continue;
ocr->proc = NULL;
(*ocr->maintenance) (reason, ocr->data, status);
return APR_SUCCESS;
}
return APR_EPROC_UNKNOWN;
}
APR_DECLARE(void) apr_proc_other_child_refresh(apr_other_child_rec_t *ocr,
int reason)
{
/* Todo:
* Implement code to detect if pipes are still alive.
*/
#ifdef WIN32
DWORD status;
if (ocr->proc == NULL)
return;
if (!ocr->proc->hproc) {
/* Already mopped up, perhaps we apr_proc_kill'ed it,
* they should have already unregistered!
*/
ocr->proc = NULL;
(*ocr->maintenance) (APR_OC_REASON_LOST, ocr->data, -1);
}
else if (!GetExitCodeProcess(ocr->proc->hproc, &status)) {
CloseHandle(ocr->proc->hproc);
ocr->proc->hproc = NULL;
ocr->proc = NULL;
(*ocr->maintenance) (APR_OC_REASON_LOST, ocr->data, -1);
}
else if (status == STILL_ACTIVE) {
(*ocr->maintenance) (reason, ocr->data, -1);
}
else {
CloseHandle(ocr->proc->hproc);
ocr->proc->hproc = NULL;
ocr->proc = NULL;
(*ocr->maintenance) (APR_OC_REASON_DEATH, ocr->data, status);
}
#else /* ndef Win32 */
pid_t waitret;
int status;
if (ocr->proc == NULL)
return;
waitret = waitpid(ocr->proc->pid, &status, WNOHANG);
if (waitret == ocr->proc->pid) {
ocr->proc = NULL;
(*ocr->maintenance) (APR_OC_REASON_DEATH, ocr->data, status);
}
else if (waitret == 0) {
(*ocr->maintenance) (reason, ocr->data, -1);
}
else if (waitret == -1) {
/* uh what the heck? they didn't call unregister? */
ocr->proc = NULL;
(*ocr->maintenance) (APR_OC_REASON_LOST, ocr->data, -1);
}
#endif
}
APR_DECLARE(void) apr_proc_other_child_refresh_all(int reason)
{
apr_other_child_rec_t *ocr, *next_ocr;
for (ocr = other_children; ocr; ocr = next_ocr) {
next_ocr = ocr->next;
apr_proc_other_child_refresh(ocr, reason);
}
}
#else /* !APR_HAS_OTHER_CHILD */
APR_DECLARE(void) apr_proc_other_child_register(apr_proc_t *proc,
void (*maintenance) (int reason, void *, int status),
void *data, apr_file_t *write_fd, apr_pool_t *p)
{
return;
}
APR_DECLARE(void) apr_proc_other_child_unregister(void *data)
{
return;
}
APR_DECLARE(apr_status_t) apr_proc_other_child_alert(apr_proc_t *proc,
int reason,
int status)
{
return APR_ENOTIMPL;
}
APR_DECLARE(void) apr_proc_other_child_refresh(apr_other_child_rec_t *ocr,
int reason)
{
return;
}
APR_DECLARE(void) apr_proc_other_child_refresh_all(int reason)
{
return;
}
#endif /* APR_HAS_OTHER_CHILD */
/* XXX: deprecated for removal in 1.0
* The checks behaved differently between win32 and unix, while
* the old win32 code did a health check, the unix code called
* other_child_check only at restart.
*/
APR_DECLARE(void) apr_proc_other_child_check(void)
{
#ifdef WIN32
apr_proc_other_child_refresh_all(APR_OC_REASON_RUNNING);
#else
apr_proc_other_child_refresh_all(APR_OC_REASON_RESTART);
#endif
}
/* XXX: deprecated for removal in 1.0
* This really didn't test any sort of read - it simply notified
* the maintenance function that the process had died.
*/
APR_DECLARE(apr_status_t) apr_proc_other_child_read(apr_proc_t *proc, int status)
{
return apr_proc_other_child_alert(proc, APR_OC_REASON_DEATH, status);
}
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