231 lines
8.4 KiB
C
231 lines
8.4 KiB
C
/* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "win32/apr_arch_file_io.h"
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#include "apr_file_io.h"
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#include "apr_general.h"
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#include "apr_strings.h"
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#if APR_HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <string.h>
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#include <stdio.h>
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#if APR_HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#if APR_HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#include "apr_arch_misc.h"
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APR_DECLARE(apr_status_t) apr_file_pipe_timeout_set(apr_file_t *thepipe, apr_interval_time_t timeout)
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{
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/* Always OK to unset timeouts */
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if (timeout == -1) {
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thepipe->timeout = timeout;
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return APR_SUCCESS;
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}
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if (!thepipe->pipe) {
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return APR_ENOTIMPL;
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}
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if (timeout && !(thepipe->pOverlapped)) {
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/* Cannot be nonzero if a pipe was opened blocking
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*/
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return APR_EINVAL;
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}
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thepipe->timeout = timeout;
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_file_pipe_timeout_get(apr_file_t *thepipe, apr_interval_time_t *timeout)
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{
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/* Always OK to get the timeout (even if it's unset ... -1) */
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*timeout = thepipe->timeout;
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_file_pipe_create(apr_file_t **in, apr_file_t **out, apr_pool_t *p)
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{
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/* Unix creates full blocking pipes. */
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return apr_create_nt_pipe(in, out, APR_FULL_BLOCK, p);
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}
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/* apr_create_nt_pipe()
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* An internal (for now) APR function used by apr_proc_create()
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* when setting up pipes to communicate with the child process.
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* apr_create_nt_pipe() allows setting the blocking mode of each end of
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* the pipe when the pipe is created (rather than after the pipe is created).
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* A pipe handle must be opened in full async i/o mode in order to
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* emulate Unix non-blocking pipes with timeouts.
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*
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* In general, we don't want to enable child side pipe handles for async i/o.
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* This prevents us from enabling both ends of the pipe for async i/o in
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* apr_file_pipe_create.
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*
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* Why not use NamedPipes on NT which support setting pipe state to
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* non-blocking? On NT, even though you can set a pipe non-blocking,
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* there is no clean way to set event driven non-zero timeouts (e.g select(),
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* WaitForSinglelObject, et. al. will not detect pipe i/o). On NT, you
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* have to poll the pipe to detect i/o on a non-blocking pipe.
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*/
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apr_status_t apr_create_nt_pipe(apr_file_t **in, apr_file_t **out,
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apr_int32_t blocking_mode,
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apr_pool_t *p)
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{
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#ifdef _WIN32_WCE
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return APR_ENOTIMPL;
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#else
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SECURITY_ATTRIBUTES sa;
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static unsigned long id = 0;
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DWORD dwPipeMode;
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DWORD dwOpenMode;
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char name[50];
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sa.nLength = sizeof(sa);
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sa.bInheritHandle = TRUE;
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sa.lpSecurityDescriptor = NULL;
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(*in) = (apr_file_t *)apr_pcalloc(p, sizeof(apr_file_t));
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(*in)->pool = p;
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(*in)->fname = NULL;
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(*in)->pipe = 1;
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(*in)->timeout = -1;
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(*in)->ungetchar = -1;
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(*in)->eof_hit = 0;
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(*in)->filePtr = 0;
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(*in)->bufpos = 0;
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(*in)->dataRead = 0;
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(*in)->direction = 0;
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(*in)->pOverlapped = NULL;
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(void) apr_pollset_create(&(*in)->pollset, 1, p, 0);
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(*out) = (apr_file_t *)apr_pcalloc(p, sizeof(apr_file_t));
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(*out)->pool = p;
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(*out)->fname = NULL;
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(*out)->pipe = 1;
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(*out)->timeout = -1;
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(*out)->ungetchar = -1;
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(*out)->eof_hit = 0;
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(*out)->filePtr = 0;
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(*out)->bufpos = 0;
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(*out)->dataRead = 0;
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(*out)->direction = 0;
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(*out)->pOverlapped = NULL;
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(void) apr_pollset_create(&(*out)->pollset, 1, p, 0);
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if (apr_os_level >= APR_WIN_NT) {
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/* Create the read end of the pipe */
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dwOpenMode = PIPE_ACCESS_INBOUND;
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if (blocking_mode == APR_WRITE_BLOCK /* READ_NONBLOCK */
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|| blocking_mode == APR_FULL_NONBLOCK) {
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dwOpenMode |= FILE_FLAG_OVERLAPPED;
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(*in)->pOverlapped = (OVERLAPPED*) apr_pcalloc(p, sizeof(OVERLAPPED));
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(*in)->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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}
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dwPipeMode = 0;
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sprintf(name, "\\\\.\\pipe\\apr-pipe-%u.%lu", getpid(), id++);
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(*in)->filehand = CreateNamedPipe(name,
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dwOpenMode,
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dwPipeMode,
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1, //nMaxInstances,
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0, //nOutBufferSize,
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65536, //nInBufferSize,
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1, //nDefaultTimeOut,
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&sa);
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/* Create the write end of the pipe */
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dwOpenMode = FILE_ATTRIBUTE_NORMAL;
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if (blocking_mode == APR_READ_BLOCK /* WRITE_NONBLOCK */
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|| blocking_mode == APR_FULL_NONBLOCK) {
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dwOpenMode |= FILE_FLAG_OVERLAPPED;
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(*out)->pOverlapped = (OVERLAPPED*) apr_pcalloc(p, sizeof(OVERLAPPED));
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(*out)->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
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}
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(*out)->filehand = CreateFile(name,
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GENERIC_WRITE, // access mode
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0, // share mode
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&sa, // Security attributes
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OPEN_EXISTING, // dwCreationDisposition
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dwOpenMode, // Pipe attributes
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NULL); // handle to template file
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}
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else {
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/* Pipes on Win9* are blocking. Live with it. */
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if (!CreatePipe(&(*in)->filehand, &(*out)->filehand, &sa, 65536)) {
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return apr_get_os_error();
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}
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}
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apr_pool_cleanup_register((*in)->pool, (void *)(*in), file_cleanup,
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apr_pool_cleanup_null);
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apr_pool_cleanup_register((*out)->pool, (void *)(*out), file_cleanup,
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apr_pool_cleanup_null);
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return APR_SUCCESS;
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#endif /* _WIN32_WCE */
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}
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APR_DECLARE(apr_status_t) apr_file_namedpipe_create(const char *filename,
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apr_fileperms_t perm,
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apr_pool_t *pool)
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{
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/* Not yet implemented, interface not suitable.
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* Win32 requires the named pipe to be *opened* at the time it's
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* created, and to do so, blocking or non blocking must be elected.
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*/
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return APR_ENOTIMPL;
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}
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/* XXX: Problem; we need to choose between blocking and nonblocking based
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* on how *thefile was opened, and we don't have that information :-/
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* Hack; assume a blocking socket, since the most common use for the fn
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* would be to handle stdio-style or blocking pipes. Win32 doesn't have
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* select() blocking for pipes anyways :(
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*/
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APR_DECLARE(apr_status_t) apr_os_pipe_put_ex(apr_file_t **file,
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apr_os_file_t *thefile,
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int register_cleanup,
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apr_pool_t *pool)
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{
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(*file) = apr_pcalloc(pool, sizeof(apr_file_t));
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(*file)->pool = pool;
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(*file)->pipe = 1;
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(*file)->timeout = -1;
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(*file)->ungetchar = -1;
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(*file)->filehand = *thefile;
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(void) apr_pollset_create(&(*file)->pollset, 1, pool, 0);
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if (register_cleanup) {
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apr_pool_cleanup_register(pool, *file, file_cleanup,
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apr_pool_cleanup_null);
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}
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return APR_SUCCESS;
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}
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APR_DECLARE(apr_status_t) apr_os_pipe_put(apr_file_t **file,
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apr_os_file_t *thefile,
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apr_pool_t *pool)
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{
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return apr_os_pipe_put_ex(file, thefile, 0, pool);
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}
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