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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #include "apr_arch_threadproc.h"
19 apr_status_t apr_proc_detach(int daemonize)
26 #if !defined(MPE) && !defined(OS2) && !defined(TPF) && !defined(BEOS)
27 /* Don't detach for MPE because child processes can't survive the death of
33 fprintf(stderr, "unable to fork new process\n");
34 exit(1); /* we can't do anything here, so just exit. */
36 /* RAISE_SIGSTOP(DETACH);*/
39 if ((pgrp = setsid()) == -1) {
42 #elif defined(NEXT) || defined(NEWSOS)
43 if (setpgrp(0, getpid()) == -1 || (pgrp = getpgrp(0)) == -1) {
46 #elif defined(OS2) || defined(TPF)
47 /* OS/2 don't support process group IDs */
50 /* MPE uses negative pid for process group */
53 if ((pgrp = setpgid(0, 0)) == -1) {
58 /* close out the standard file descriptors */
59 if (freopen("/dev/null", "r", stdin) == NULL) {
61 /* continue anyhow -- note we can't close out descriptor 0 because we
62 * have nothing to replace it with, and if we didn't have a descriptor
63 * 0 the next file would be created with that value ... leading to
67 if (freopen("/dev/null", "w", stdout) == NULL) {
70 /* We are going to reopen this again in a little while to the error
71 * log file, but better to do it twice and suffer a small performance
72 * hit for consistancy than not reopen it here.
74 if (freopen("/dev/null", "w", stderr) == NULL) {
83 /* From ikluft@amdahl.com
84 * this is not ideal but it works for SVR3 variants
85 * Modified by dwd@bell-labs.com to call wait3 instead of wait because
86 * apache started to use the WNOHANG option.
88 int waitpid(pid_t pid, int *statusp, int options)
91 if (kill(pid, 0) == -1) {
95 while (((tmp_pid = wait3(statusp, options, 0)) != pid) &&
96 (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))