/* Copyright 2000-2004 The Apache Software Foundation
		 *
		 * Licensed 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_arch_threadproc.h"
		
		APR_DECLARE(apr_status_t) apr_proc_detach(int daemonize)
      ######    {
      ######        int x;
		
      ######        chdir("/");
		#if !defined(MPE) && !defined(OS2) && !defined(TPF) && !defined(BEOS)
		    /* Don't detach for MPE because child processes can't survive the death of
		     * the parent. */
      ######        if (daemonize) {
      ######    	    if ((x = fork()) > 0) {
      ######    	        exit(0);
		        }
      ######    	    else if (x == -1) {
      ######    	        perror("fork");
      ######    	        fprintf(stderr, "unable to fork new process\n");
      ######    	        exit(1);  /* we can't do anything here, so just exit. */
			    }
			    /* RAISE_SIGSTOP(DETACH); */
		    }
		#endif
		
		#ifdef HAVE_SETSID
		    /* A setsid() failure is not fatal if we didn't just fork().
		     * The calling process may be the process group leader, in
		     * which case setsid() will fail with EPERM.
		     */
      ######        if (setsid() == -1 && daemonize) {
      ######            return errno;
		    }
		#elif defined(NEXT) || defined(NEWSOS)
		    if (setpgrp(0, getpid()) == -1) {
		        return errno;
		    }
		#elif defined(OS2) || defined(TPF) || defined(MPE)
		    /* do nothing */
		#else
		    if (setpgid(0, 0) == -1) {
		        return errno;
		    }
		#endif
		
		    /* close out the standard file descriptors */
      ######        if (freopen("/dev/null", "r", stdin) == NULL) {
      ######            return errno;
		        /* continue anyhow -- note we can't close out descriptor 0 because we
		         * have nothing to replace it with, and if we didn't have a descriptor
		         * 0 the next file would be created with that value ... leading to
		         * havoc.
		         */
		    }
      ######        if (freopen("/dev/null", "w", stdout) == NULL) {
      ######            return errno;
		    }
		     /* We are going to reopen this again in a little while to the error
		      * log file, but better to do it twice and suffer a small performance
		      * hit for consistancy than not reopen it here.
		      */
      ######        if (freopen("/dev/null", "w", stderr) == NULL) {
      ######            return errno;
		    }
      ######        return APR_SUCCESS;
		}
		
		#if (!HAVE_WAITPID)
		/* From ikluft@amdahl.com
		 * this is not ideal but it works for SVR3 variants
		 * Modified by dwd@bell-labs.com to call wait3 instead of wait because
		 *   apache started to use the WNOHANG option.
		 */
		int waitpid(pid_t pid, int *statusp, int options)
		{
		    int tmp_pid;
		    if (kill(pid, 0) == -1) {
		        errno = ECHILD;
		        return -1;
		    }
		    while (((tmp_pid = wait3(statusp, options, 0)) != pid) &&
		                (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
		        ;
		    return tmp_pid;
		}
		#endif