bcd711feb0
Signed-off-by: sochin.jiang <sochin@aliyun.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/*
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* QEMU I/O channels files driver
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*
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* Copyright (c) 2015 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QIO_CHANNEL_FILE_H
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#define QIO_CHANNEL_FILE_H
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#include "io/channel.h"
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#define TYPE_QIO_CHANNEL_FILE "qio-channel-file"
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#define QIO_CHANNEL_FILE(obj) \
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OBJECT_CHECK(QIOChannelFile, (obj), TYPE_QIO_CHANNEL_FILE)
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typedef struct QIOChannelFile QIOChannelFile;
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/**
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* QIOChannelFile:
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*
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* The QIOChannelFile object provides a channel implementation
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* that is able to perform I/O on block devices, character
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* devices, FIFOs, pipes and plain files. While it is technically
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* able to work on sockets too on the UNIX platform, this is not
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* portable to Windows and lacks some extra sockets specific
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* functionality. So the QIOChannelSocket object is recommended
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* for that use case.
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*
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*/
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struct QIOChannelFile {
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QIOChannel parent;
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int fd;
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};
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/**
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* qio_channel_file_new_fd:
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* @fd: the file descriptor
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*
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* Create a new IO channel object for a file represented
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* by the @fd parameter. @fd can be associated with a
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* block device, character device, fifo, pipe, or a
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* regular file. For sockets, the QIOChannelSocket class
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* should be used instead, as this provides greater
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* functionality and cross platform portability.
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*
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* The channel will own the passed in file descriptor
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* and will take responsibility for closing it, so the
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* caller must not close it. If appropriate the caller
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* should dup() its FD before opening the channel.
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*
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* Returns: the new channel object
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*/
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QIOChannelFile *
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qio_channel_file_new_fd(int fd);
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/**
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* qio_channel_file_new_path:
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* @path: the file path
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* @flags: the open flags (O_RDONLY|O_WRONLY|O_RDWR, etc)
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* @mode: the file creation mode if O_WRONLY is set in @flags
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* @errp: pointer to initialized error object
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*
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* Create a new IO channel object for a file represented
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* by the @path parameter. @path can point to any
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* type of file on which sequential I/O can be
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* performed, whether it be a plain file, character
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* device or block device.
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*
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* Returns: the new channel object
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*/
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QIOChannelFile *
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qio_channel_file_new_path(const char *path,
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int flags,
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mode_t mode,
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Error **errp);
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#endif /* QIO_CHANNEL_FILE_H */
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