xref: /openbmc/qemu/include/io/channel-command.h (revision ec5b6c9c)
1 /*
2  * QEMU I/O channels external command driver
3  *
4  * Copyright (c) 2015 Red Hat, Inc.
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18  *
19  */
20 
21 #ifndef QIO_CHANNEL_COMMAND_H
22 #define QIO_CHANNEL_COMMAND_H
23 
24 #include "io/channel.h"
25 #include "qom/object.h"
26 
27 #define TYPE_QIO_CHANNEL_COMMAND "qio-channel-command"
28 OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelCommand, QIO_CHANNEL_COMMAND)
29 
30 
31 
32 /**
33  * QIOChannelCommand:
34  *
35  * The QIOChannelCommand class provides a channel implementation
36  * that can transport data with an externally running command
37  * via its stdio streams.
38  */
39 
40 struct QIOChannelCommand {
41     QIOChannel parent;
42     int writefd;
43     int readfd;
44     GPid pid;
45 #ifdef WIN32
46     bool blocking;
47 #endif
48 };
49 
50 
51 /**
52  * qio_channel_command_new_spawn:
53  * @argv: the NULL terminated list of command arguments
54  * @flags: the I/O mode, one of O_RDONLY, O_WRONLY, O_RDWR
55  * @errp: pointer to a NULL-initialized error object
56  *
57  * Create a channel for performing I/O with the
58  * command to be spawned with arguments @argv.
59  *
60  * Returns: the command channel object, or NULL on error
61  */
62 QIOChannelCommand *
63 qio_channel_command_new_spawn(const char *const argv[],
64                               int flags,
65                               Error **errp);
66 
67 
68 #endif /* QIO_CHANNEL_COMMAND_H */
69