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/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* 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 "win32/apr_arch_file_io.h"
#include "apr_file_io.h"
#include "apr_general.h"
#include "apr_strings.h"
#if APR_HAVE_ERRNO_H
#include <errno.h>
#endif
#include <string.h>
#include <stdio.h>
#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if APR_HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include "apr_arch_misc.h"
APR_DECLARE(apr_status_t) apr_file_pipe_timeout_set(apr_file_t *thepipe, apr_interval_time_t timeout)
{
/* Always OK to unset timeouts */
if (timeout == -1) {
thepipe->timeout = timeout;
return APR_SUCCESS;
}
if (!thepipe->pipe) {
return APR_ENOTIMPL;
}
if (timeout && !(thepipe->pOverlapped)) {
/* Cannot be nonzero if a pipe was opened blocking
*/
return APR_EINVAL;
}
thepipe->timeout = timeout;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_file_pipe_timeout_get(apr_file_t *thepipe, apr_interval_time_t *timeout)
{
/* Always OK to get the timeout (even if it's unset ... -1) */
*timeout = thepipe->timeout;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_file_pipe_create(apr_file_t **in, apr_file_t **out, apr_pool_t *p)
{
/* Unix creates full blocking pipes. */
return apr_create_nt_pipe(in, out, APR_FULL_BLOCK, p);
}
/* apr_create_nt_pipe()
* An internal (for now) APR function used by apr_proc_create()
* when setting up pipes to communicate with the child process.
* apr_create_nt_pipe() allows setting the blocking mode of each end of
* the pipe when the pipe is created (rather than after the pipe is created).
* A pipe handle must be opened in full async i/o mode in order to
* emulate Unix non-blocking pipes with timeouts.
*
* In general, we don't want to enable child side pipe handles for async i/o.
* This prevents us from enabling both ends of the pipe for async i/o in
* apr_file_pipe_create.
*
* Why not use NamedPipes on NT which support setting pipe state to
* non-blocking? On NT, even though you can set a pipe non-blocking,
* there is no clean way to set event driven non-zero timeouts (e.g select(),
* WaitForSinglelObject, et. al. will not detect pipe i/o). On NT, you
* have to poll the pipe to detect i/o on a non-blocking pipe.
*/
apr_status_t apr_create_nt_pipe(apr_file_t **in, apr_file_t **out,
apr_int32_t blocking_mode,
apr_pool_t *p)
{
#ifdef _WIN32_WCE
return APR_ENOTIMPL;
#else
SECURITY_ATTRIBUTES sa;
static unsigned long id = 0;
DWORD dwPipeMode;
DWORD dwOpenMode;
char name[50];
sa.nLength = sizeof(sa);
sa.bInheritHandle = TRUE;
sa.lpSecurityDescriptor = NULL;
(*in) = (apr_file_t *)apr_pcalloc(p, sizeof(apr_file_t));
(*in)->pool = p;
(*in)->fname = NULL;
(*in)->pipe = 1;
(*in)->timeout = -1;
(*in)->ungetchar = -1;
(*in)->eof_hit = 0;
(*in)->filePtr = 0;
(*in)->bufpos = 0;
(*in)->dataRead = 0;
(*in)->direction = 0;
(*in)->pOverlapped = NULL;
(void) apr_pollset_create(&(*in)->pollset, 1, p, 0);
(*out) = (apr_file_t *)apr_pcalloc(p, sizeof(apr_file_t));
(*out)->pool = p;
(*out)->fname = NULL;
(*out)->pipe = 1;
(*out)->timeout = -1;
(*out)->ungetchar = -1;
(*out)->eof_hit = 0;
(*out)->filePtr = 0;
(*out)->bufpos = 0;
(*out)->dataRead = 0;
(*out)->direction = 0;
(*out)->pOverlapped = NULL;
(void) apr_pollset_create(&(*out)->pollset, 1, p, 0);
if (apr_os_level >= APR_WIN_NT) {
/* Create the read end of the pipe */
dwOpenMode = PIPE_ACCESS_INBOUND;
if (blocking_mode == APR_WRITE_BLOCK /* READ_NONBLOCK */
|| blocking_mode == APR_FULL_NONBLOCK) {
dwOpenMode |= FILE_FLAG_OVERLAPPED;
(*in)->pOverlapped = (OVERLAPPED*) apr_pcalloc(p, sizeof(OVERLAPPED));
(*in)->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
}
dwPipeMode = 0;
sprintf(name, "\\\\.\\pipe\\apr-pipe-%u.%lu", getpid(), id++);
(*in)->filehand = CreateNamedPipe(name,
dwOpenMode,
dwPipeMode,
1, //nMaxInstances,
0, //nOutBufferSize,
65536, //nInBufferSize,
1, //nDefaultTimeOut,
&sa);
/* Create the write end of the pipe */
dwOpenMode = FILE_ATTRIBUTE_NORMAL;
if (blocking_mode == APR_READ_BLOCK /* WRITE_NONBLOCK */
|| blocking_mode == APR_FULL_NONBLOCK) {
dwOpenMode |= FILE_FLAG_OVERLAPPED;
(*out)->pOverlapped = (OVERLAPPED*) apr_pcalloc(p, sizeof(OVERLAPPED));
(*out)->pOverlapped->hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
}
(*out)->filehand = CreateFile(name,
GENERIC_WRITE, // access mode
0, // share mode
&sa, // Security attributes
OPEN_EXISTING, // dwCreationDisposition
dwOpenMode, // Pipe attributes
NULL); // handle to template file
}
else {
/* Pipes on Win9* are blocking. Live with it. */
if (!CreatePipe(&(*in)->filehand, &(*out)->filehand, &sa, 65536)) {
return apr_get_os_error();
}
}
apr_pool_cleanup_register((*in)->pool, (void *)(*in), file_cleanup,
apr_pool_cleanup_null);
apr_pool_cleanup_register((*out)->pool, (void *)(*out), file_cleanup,
apr_pool_cleanup_null);
return APR_SUCCESS;
#endif /* _WIN32_WCE */
}
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