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-rw-r--r--misc/unix/otherchild.c221
1 files changed, 221 insertions, 0 deletions
diff --git a/misc/unix/otherchild.c b/misc/unix/otherchild.c
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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 */
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