/* 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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