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