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 "apr_arch_threadproc.h"
18
19apr_status_t apr_proc_detach(int daemonize)
20{
21#if 0
22    int x;
23    pid_t pgrp;
24
25    chdir("/");
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
28   the parent. */
29    if ((x = fork()) > 0)
30        exit(0);
31    else if (x == -1) {
32        perror("fork");
33        fprintf(stderr, "unable to fork new process\n");
34        exit(1);  /* we can't do anything here, so just exit. */
35    }
36/*    RAISE_SIGSTOP(DETACH);*/
37#endif
38#if APR_HAVE_SETSID
39    if ((pgrp = setsid()) == -1) {
40        return errno;
41    }
42#elif defined(NEXT) || defined(NEWSOS)
43    if (setpgrp(0, getpid()) == -1 || (pgrp = getpgrp(0)) == -1) {
44        return errno;
45    }
46#elif defined(OS2) || defined(TPF)
47    /* OS/2 don't support process group IDs */
48    pgrp = getpid();
49#elif defined(MPE)
50    /* MPE uses negative pid for process group */
51    pgrp = -getpid();
52#else
53    if ((pgrp = setpgid(0, 0)) == -1) {
54        return errno;
55    }
56#endif
57
58    /* close out the standard file descriptors */
59    if (freopen("/dev/null", "r", stdin) == NULL) {
60        return errno;
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
64         * havoc.
65         */
66    }
67    if (freopen("/dev/null", "w", stdout) == NULL) {
68        return errno;
69    }
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.
73      */
74    if (freopen("/dev/null", "w", stderr) == NULL) {
75        return errno;
76    }
77#endif
78    return APR_SUCCESS;
79}
80
81#if 0
82#if (!HAVE_WAITPID)
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.
87 */
88int waitpid(pid_t pid, int *statusp, int options)
89{
90    int tmp_pid;
91    if (kill(pid, 0) == -1) {
92        errno = ECHILD;
93        return -1;
94    }
95    while (((tmp_pid = wait3(statusp, options, 0)) != pid) &&
96                (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
97        ;
98    return tmp_pid;
99}
100#endif
101#endif
102
103