[mirror_qemu.git] / io / channel-command.c

/*
 * QEMU I/O channels external command driver
 *
 * Copyright (c) 2015 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "qemu/osdep.h"
#include "io/channel-command.h"
#include "io/channel-util.h"
#include "io/channel-watch.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "qemu/sockets.h"
#include "trace.h"

/**
 * qio_channel_command_new_pid:
 * @writefd: the FD connected to the command's stdin
 * @readfd: the FD connected to the command's stdout
 * @pid: the PID/HANDLE of the running child command
 * @errp: pointer to a NULL-initialized error object
 *
 * Create a channel for performing I/O with the
 * previously spawned command identified by @pid.
 * The two file descriptors provide the connection
 * to command's stdio streams, either one or which
 * may be -1 to indicate that stream is not open.
 *
 * The channel will take ownership of the process
 * @pid and will kill it when closing the channel.
 * Similarly it will take responsibility for
 * closing the file descriptors @writefd and @readfd.
 *
 * Returns: the command channel object, or NULL on error
 */
static QIOChannelCommand *
qio_channel_command_new_pid(int writefd,
                            int readfd,
                            GPid pid)
{
    QIOChannelCommand *ioc;

    ioc = QIO_CHANNEL_COMMAND(object_new(TYPE_QIO_CHANNEL_COMMAND));

    ioc->readfd = readfd;
    ioc->writefd = writefd;
    ioc->pid = pid;

    trace_qio_channel_command_new_pid(ioc, writefd, readfd,
#ifdef WIN32
                                      GetProcessId(pid)
#else
                                      pid
#endif
        );
    return ioc;
}

QIOChannelCommand *
qio_channel_command_new_spawn(const char *const argv[],
                              int flags,
                              Error **errp)
{
    g_autoptr(GError) err = NULL;
    GPid pid = 0;
    GSpawnFlags gflags = G_SPAWN_CLOEXEC_PIPES | G_SPAWN_DO_NOT_REAP_CHILD;
    int stdinfd = -1, stdoutfd = -1;

    flags = flags & O_ACCMODE;
    gflags |= flags == O_WRONLY ? G_SPAWN_STDOUT_TO_DEV_NULL : 0;

    if (!g_spawn_async_with_pipes(NULL, (char **)argv, NULL, gflags, NULL, NULL,
                                  &pid,
                                  flags == O_RDONLY ? NULL : &stdinfd,
                                  flags == O_WRONLY ? NULL : &stdoutfd,
                                  NULL, &err)) {
        error_setg(errp, "%s", err->message);
        return NULL;
    }

    return qio_channel_command_new_pid(stdinfd, stdoutfd, pid);
}

#ifndef WIN32
static int qio_channel_command_abort(QIOChannelCommand *ioc,
                                     Error **errp)
{
    pid_t ret;
    int status;
    int step = 0;

    /* See if intermediate process has exited; if not, try a nice
     * SIGTERM followed by a more severe SIGKILL.
     */
 rewait:
    trace_qio_channel_command_abort(ioc, ioc->pid);
    ret = waitpid(ioc->pid, &status, WNOHANG);
    trace_qio_channel_command_wait(ioc, ioc->pid, ret, status);
    if (ret == (pid_t)-1) {
        if (errno == EINTR) {
            goto rewait;
        } else {
            error_setg_errno(errp, errno,
                             "Cannot wait on pid %llu",
                             (unsigned long long)ioc->pid);
            return -1;
        }
    } else if (ret == 0) {
        if (step == 0) {
            kill(ioc->pid, SIGTERM);
        } else if (step == 1) {
            kill(ioc->pid, SIGKILL);
        } else {
            error_setg(errp,
                       "Process %llu refused to die",
                       (unsigned long long)ioc->pid);
            return -1;
        }
        step++;
        usleep(10 * 1000);
        goto rewait;
    }

    return 0;
}
#else
static int qio_channel_command_abort(QIOChannelCommand *ioc,
                                     Error **errp)
{
    DWORD ret;

    TerminateProcess(ioc->pid, 0);
    ret = WaitForSingleObject(ioc->pid, 1000);
    if (ret != WAIT_OBJECT_0) {
        error_setg(errp,
                   "Process %llu refused to die",
                   (unsigned long long)GetProcessId(ioc->pid));
        return -1;
    }

    return 0;
}
#endif /* ! WIN32 */


static void qio_channel_command_init(Object *obj)
{
    QIOChannelCommand *ioc = QIO_CHANNEL_COMMAND(obj);
    ioc->readfd = -1;
    ioc->writefd = -1;
    ioc->pid = 0;
}

static void qio_channel_command_finalize(Object *obj)
{
    QIOChannelCommand *ioc = QIO_CHANNEL_COMMAND(obj);
    if (ioc->readfd != -1) {
        close(ioc->readfd);
    }
    if (ioc->writefd != -1 &&
        ioc->writefd != ioc->readfd) {
        close(ioc->writefd);
    }
    ioc->writefd = ioc->readfd = -1;
    if (ioc->pid > 0) {
        qio_channel_command_abort(ioc, NULL);
        g_spawn_close_pid(ioc->pid);
    }
}

#ifdef WIN32
static bool win32_fd_poll(int fd, gushort events)
{
    GPollFD pfd = { .fd = _get_osfhandle(fd), .events = events };
    int res;

    do {
        res = g_poll(&pfd, 1, 0);
    } while (res < 0 && errno == EINTR);
    if (res == 0) {
        return false;
    }

    return true;
}
#endif

static ssize_t qio_channel_command_readv(QIOChannel *ioc,
                                         const struct iovec *iov,
                                         size_t niov,
                                         int **fds,
                                         size_t *nfds,
                                         int flags,
                                         Error **errp)
{
    QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
    ssize_t ret;

#ifdef WIN32
    if (!cioc->blocking && !win32_fd_poll(cioc->readfd, G_IO_IN)) {
        return QIO_CHANNEL_ERR_BLOCK;
    }
#endif

 retry:
    ret = readv(cioc->readfd, iov, niov);
    if (ret < 0) {
        if (errno == EAGAIN) {
            return QIO_CHANNEL_ERR_BLOCK;
        }
        if (errno == EINTR) {
            goto retry;
        }

        error_setg_errno(errp, errno,
                         "Unable to read from command");
        return -1;
    }

    return ret;
}

static ssize_t qio_channel_command_writev(QIOChannel *ioc,
                                          const struct iovec *iov,
                                          size_t niov,
                                          int *fds,
                                          size_t nfds,
                                          int flags,
                                          Error **errp)
{
    QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
    ssize_t ret;

#ifdef WIN32
    if (!cioc->blocking && !win32_fd_poll(cioc->writefd, G_IO_OUT)) {
        return QIO_CHANNEL_ERR_BLOCK;
    }
#endif

 retry:
    ret = writev(cioc->writefd, iov, niov);
    if (ret <= 0) {
        if (errno == EAGAIN) {
            return QIO_CHANNEL_ERR_BLOCK;
        }
        if (errno == EINTR) {
            goto retry;
        }
        error_setg_errno(errp, errno, "%s",
                         "Unable to write to command");
        return -1;
    }
    return ret;
}

static int qio_channel_command_set_blocking(QIOChannel *ioc,
                                            bool enabled,
                                            Error **errp)
{
    QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);

#ifdef WIN32
    cioc->blocking = enabled;
#else

    if ((cioc->writefd >= 0 && !g_unix_set_fd_nonblocking(cioc->writefd, !enabled, NULL)) ||
        (cioc->readfd >= 0 && !g_unix_set_fd_nonblocking(cioc->readfd, !enabled, NULL))) {
        error_setg_errno(errp, errno, "Failed to set FD nonblocking");
        return -1;
    }
#endif
    return 0;
}


static int qio_channel_command_close(QIOChannel *ioc,
                                     Error **errp)
{
    QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
    int rv = 0;
#ifndef WIN32
    pid_t wp;
#endif

    /* We close FDs before killing, because that
     * gives a better chance of clean shutdown
     */
    if (cioc->readfd != -1 &&
        close(cioc->readfd) < 0) {
        rv = -1;
    }
    if (cioc->writefd != -1 &&
        cioc->writefd != cioc->readfd &&
        close(cioc->writefd) < 0) {
        rv = -1;
    }
    cioc->writefd = cioc->readfd = -1;

#ifndef WIN32
    do {
        wp = waitpid(cioc->pid, NULL, 0);
    } while (wp == (pid_t)-1 && errno == EINTR);
    if (wp == (pid_t)-1) {
        error_setg_errno(errp, errno, "Failed to wait for pid %llu",
                         (unsigned long long)cioc->pid);
        return -1;
    }
#else
    WaitForSingleObject(cioc->pid, INFINITE);
#endif

    if (rv < 0) {
        error_setg_errno(errp, errno, "%s",
                         "Unable to close command");
    }
    return rv;
}


static void qio_channel_command_set_aio_fd_handler(QIOChannel *ioc,
                                                   AioContext *read_ctx,
                                                   IOHandler *io_read,
                                                   AioContext *write_ctx,
                                                   IOHandler *io_write,
                                                   void *opaque)
{
    QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);

    qio_channel_util_set_aio_fd_handler(cioc->readfd, read_ctx, io_read,
                                        cioc->writefd, write_ctx, io_write,
                                        opaque);
}


static GSource *qio_channel_command_create_watch(QIOChannel *ioc,
                                                 GIOCondition condition)
{
    QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
    return qio_channel_create_fd_pair_watch(ioc,
                                            cioc->readfd,
                                            cioc->writefd,
                                            condition);
}


static void qio_channel_command_class_init(ObjectClass *klass,
                                           void *class_data G_GNUC_UNUSED)
{
    QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);

    ioc_klass->io_writev = qio_channel_command_writev;
    ioc_klass->io_readv = qio_channel_command_readv;
    ioc_klass->io_set_blocking = qio_channel_command_set_blocking;
    ioc_klass->io_close = qio_channel_command_close;
    ioc_klass->io_create_watch = qio_channel_command_create_watch;
    ioc_klass->io_set_aio_fd_handler = qio_channel_command_set_aio_fd_handler;
}

static const TypeInfo qio_channel_command_info = {
    .parent = TYPE_QIO_CHANNEL,
    .name = TYPE_QIO_CHANNEL_COMMAND,
    .instance_size = sizeof(QIOChannelCommand),
    .instance_init = qio_channel_command_init,
    .instance_finalize = qio_channel_command_finalize,
    .class_init = qio_channel_command_class_init,
};

static void qio_channel_command_register_types(void)
{
    type_register_static(&qio_channel_command_info);
}

type_init(qio_channel_command_register_types);
Commit	Line	Data
195e14d0 DB	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
c8198bd5	9	* version 2.1 of the License, or (at your option) any later version.
195e14d0 DB	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
cae9fc56	21	#include "qemu/osdep.h"
195e14d0	22	#include "io/channel-command.h"
06e0f098	23	#include "io/channel-util.h"
195e14d0	24	#include "io/channel-watch.h"
da34e65c	25	#include "qapi/error.h"
0b8fa32f	26	#include "qemu/module.h"
195e14d0 DB	27	#include "qemu/sockets.h"
	28	#include "trace.h"
	29
05e50e8f MAL	30	/**
	31	* qio_channel_command_new_pid:
	32	* @writefd: the FD connected to the command's stdin
	33	* @readfd: the FD connected to the command's stdout
a95570e3	34	* @pid: the PID/HANDLE of the running child command
05e50e8f MAL	35	* @errp: pointer to a NULL-initialized error object
	36	*
	37	* Create a channel for performing I/O with the
	38	* previously spawned command identified by @pid.
	39	* The two file descriptors provide the connection
	40	* to command's stdio streams, either one or which
	41	* may be -1 to indicate that stream is not open.
	42	*
	43	* The channel will take ownership of the process
	44	* @pid and will kill it when closing the channel.
	45	* Similarly it will take responsibility for
	46	* closing the file descriptors @writefd and @readfd.
	47	*
	48	* Returns: the command channel object, or NULL on error
	49	*/
	50	static QIOChannelCommand *
195e14d0 DB	51	qio_channel_command_new_pid(int writefd,
195e14d0 DB	52	int readfd,
a95570e3	53	GPid pid)
195e14d0 DB	54	{
	55	QIOChannelCommand *ioc;
	56
	57	ioc = QIO_CHANNEL_COMMAND(object_new(TYPE_QIO_CHANNEL_COMMAND));
	58
	59	ioc->readfd = readfd;
	60	ioc->writefd = writefd;
	61	ioc->pid = pid;
	62
ec5b6c9c MAL	63	trace_qio_channel_command_new_pid(ioc, writefd, readfd,
	64	#ifdef WIN32
	65	GetProcessId(pid)
	66	#else
	67	pid
	68	#endif
	69	);
195e14d0 DB	70	return ioc;
	71	}
	72
195e14d0 DB	73	QIOChannelCommand *
	74	qio_channel_command_new_spawn(const char *const argv[],
	75	int flags,
	76	Error **errp)
	77	{
a95570e3 MAL	78	g_autoptr(GError) err = NULL;
	79	GPid pid = 0;
	80	GSpawnFlags gflags = G_SPAWN_CLOEXEC_PIPES \| G_SPAWN_DO_NOT_REAP_CHILD;
	81	int stdinfd = -1, stdoutfd = -1;
195e14d0 DB	82
195e14d0 DB	83	flags = flags & O_ACCMODE;
a95570e3	84	gflags \|= flags == O_WRONLY ? G_SPAWN_STDOUT_TO_DEV_NULL : 0;
195e14d0	85
a95570e3 MAL	86	if (!g_spawn_async_with_pipes(NULL, (char **)argv, NULL, gflags, NULL, NULL,
	87	&pid,
	88	flags == O_RDONLY ? NULL : &stdinfd,
	89	flags == O_WRONLY ? NULL : &stdoutfd,
	90	NULL, &err)) {
	91	error_setg(errp, "%s", err->message);
	92	return NULL;
195e14d0 DB	93	}
195e14d0 DB	94
a95570e3	95	return qio_channel_command_new_pid(stdinfd, stdoutfd, pid);
195e14d0 DB	96	}
195e14d0 DB	97
195e14d0 DB	98	#ifndef WIN32
	99	static int qio_channel_command_abort(QIOChannelCommand *ioc,
	100	Error **errp)
	101	{
	102	pid_t ret;
	103	int status;
	104	int step = 0;
	105
	106	/* See if intermediate process has exited; if not, try a nice
	107	* SIGTERM followed by a more severe SIGKILL.
	108	*/
	109	rewait:
	110	trace_qio_channel_command_abort(ioc, ioc->pid);
	111	ret = waitpid(ioc->pid, &status, WNOHANG);
	112	trace_qio_channel_command_wait(ioc, ioc->pid, ret, status);
	113	if (ret == (pid_t)-1) {
	114	if (errno == EINTR) {
	115	goto rewait;
	116	} else {
	117	error_setg_errno(errp, errno,
	118	"Cannot wait on pid %llu",
	119	(unsigned long long)ioc->pid);
	120	return -1;
	121	}
	122	} else if (ret == 0) {
	123	if (step == 0) {
	124	kill(ioc->pid, SIGTERM);
	125	} else if (step == 1) {
	126	kill(ioc->pid, SIGKILL);
	127	} else {
	128	error_setg(errp,
	129	"Process %llu refused to die",
	130	(unsigned long long)ioc->pid);
	131	return -1;
	132	}
0c0a55b2	133	step++;
195e14d0 DB	134	usleep(10 * 1000);
	135	goto rewait;
	136	}
	137
	138	return 0;
	139	}
ec5b6c9c MAL	140	#else
	141	static int qio_channel_command_abort(QIOChannelCommand *ioc,
	142	Error **errp)
	143	{
	144	DWORD ret;
	145
	146	TerminateProcess(ioc->pid, 0);
	147	ret = WaitForSingleObject(ioc->pid, 1000);
	148	if (ret != WAIT_OBJECT_0) {
	149	error_setg(errp,
	150	"Process %llu refused to die",
	151	(unsigned long long)GetProcessId(ioc->pid));
	152	return -1;
	153	}
	154
	155	return 0;
	156	}
195e14d0 DB	157	#endif /* ! WIN32 */
	158
	159
	160	static void qio_channel_command_init(Object *obj)
	161	{
	162	QIOChannelCommand *ioc = QIO_CHANNEL_COMMAND(obj);
	163	ioc->readfd = -1;
	164	ioc->writefd = -1;
a95570e3	165	ioc->pid = 0;
195e14d0 DB	166	}
	167
	168	static void qio_channel_command_finalize(Object *obj)
	169	{
	170	QIOChannelCommand *ioc = QIO_CHANNEL_COMMAND(obj);
	171	if (ioc->readfd != -1) {
	172	close(ioc->readfd);
195e14d0	173	}
e155494c DB	174	if (ioc->writefd != -1 &&
e155494c DB	175	ioc->writefd != ioc->readfd) {
195e14d0	176	close(ioc->writefd);
195e14d0	177	}
e155494c	178	ioc->writefd = ioc->readfd = -1;
195e14d0	179	if (ioc->pid > 0) {
195e14d0	180	qio_channel_command_abort(ioc, NULL);
a95570e3	181	g_spawn_close_pid(ioc->pid);
195e14d0 DB	182	}
	183	}
	184
ec5b6c9c MAL	185	#ifdef WIN32
	186	static bool win32_fd_poll(int fd, gushort events)
	187	{
	188	GPollFD pfd = { .fd = _get_osfhandle(fd), .events = events };
	189	int res;
	190
	191	do {
	192	res = g_poll(&pfd, 1, 0);
	193	} while (res < 0 && errno == EINTR);
	194	if (res == 0) {
	195	return false;
	196	}
	197
	198	return true;
	199	}
	200	#endif
195e14d0 DB	201
	202	static ssize_t qio_channel_command_readv(QIOChannel *ioc,
	203	const struct iovec *iov,
	204	size_t niov,
	205	int **fds,
	206	size_t *nfds,
84615a19	207	int flags,
195e14d0 DB	208	Error **errp)
	209	{
	210	QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
	211	ssize_t ret;
	212
ec5b6c9c MAL	213	#ifdef WIN32
	214	if (!cioc->blocking && !win32_fd_poll(cioc->readfd, G_IO_IN)) {
	215	return QIO_CHANNEL_ERR_BLOCK;
	216	}
	217	#endif
	218
195e14d0 DB	219	retry:
	220	ret = readv(cioc->readfd, iov, niov);
	221	if (ret < 0) {
30fd3e27	222	if (errno == EAGAIN) {
195e14d0 DB	223	return QIO_CHANNEL_ERR_BLOCK;
	224	}
	225	if (errno == EINTR) {
	226	goto retry;
	227	}
	228
	229	error_setg_errno(errp, errno,
	230	"Unable to read from command");
	231	return -1;
	232	}
	233
	234	return ret;
	235	}
	236
	237	static ssize_t qio_channel_command_writev(QIOChannel *ioc,
	238	const struct iovec *iov,
	239	size_t niov,
	240	int *fds,
	241	size_t nfds,
b88651cb	242	int flags,
195e14d0 DB	243	Error **errp)
	244	{
	245	QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
	246	ssize_t ret;
	247
ec5b6c9c MAL	248	#ifdef WIN32
	249	if (!cioc->blocking && !win32_fd_poll(cioc->writefd, G_IO_OUT)) {
	250	return QIO_CHANNEL_ERR_BLOCK;
	251	}
	252	#endif
	253
195e14d0 DB	254	retry:
	255	ret = writev(cioc->writefd, iov, niov);
	256	if (ret <= 0) {
30fd3e27	257	if (errno == EAGAIN) {
195e14d0 DB	258	return QIO_CHANNEL_ERR_BLOCK;
	259	}
	260	if (errno == EINTR) {
	261	goto retry;
	262	}
	263	error_setg_errno(errp, errno, "%s",
	264	"Unable to write to command");
	265	return -1;
	266	}
	267	return ret;
	268	}
	269
	270	static int qio_channel_command_set_blocking(QIOChannel *ioc,
	271	bool enabled,
	272	Error **errp)
	273	{
ec5b6c9c MAL	274	QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
ec5b6c9c MAL	275
17fc1245	276	#ifdef WIN32
ec5b6c9c	277	cioc->blocking = enabled;
17fc1245	278	#else
195e14d0	279
ec5b6c9c MAL	280	if ((cioc->writefd >= 0 && !g_unix_set_fd_nonblocking(cioc->writefd, !enabled, NULL)) \|\|
ec5b6c9c MAL	281	(cioc->readfd >= 0 && !g_unix_set_fd_nonblocking(cioc->readfd, !enabled, NULL))) {
17fc1245 MAL	282	error_setg_errno(errp, errno, "Failed to set FD nonblocking");
17fc1245 MAL	283	return -1;
195e14d0	284	}
17fc1245	285	#endif
195e14d0 DB	286	return 0;
	287	}
	288
	289
	290	static int qio_channel_command_close(QIOChannel *ioc,
	291	Error **errp)
	292	{
	293	QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
	294	int rv = 0;
fe823b6f TH	295	#ifndef WIN32
	296	pid_t wp;
	297	#endif
195e14d0 DB	298
	299	/* We close FDs before killing, because that
	300	* gives a better chance of clean shutdown
	301	*/
e155494c DB	302	if (cioc->readfd != -1 &&
e155494c DB	303	close(cioc->readfd) < 0) {
195e14d0 DB	304	rv = -1;
195e14d0 DB	305	}
e155494c DB	306	if (cioc->writefd != -1 &&
	307	cioc->writefd != cioc->readfd &&
	308	close(cioc->writefd) < 0) {
195e14d0 DB	309	rv = -1;
195e14d0 DB	310	}
e155494c	311	cioc->writefd = cioc->readfd = -1;
fe823b6f	312
195e14d0	313	#ifndef WIN32
fe823b6f TH	314	do {
	315	wp = waitpid(cioc->pid, NULL, 0);
	316	} while (wp == (pid_t)-1 && errno == EINTR);
	317	if (wp == (pid_t)-1) {
	318	error_setg_errno(errp, errno, "Failed to wait for pid %llu",
	319	(unsigned long long)cioc->pid);
195e14d0 DB	320	return -1;
195e14d0 DB	321	}
ec5b6c9c MAL	322	#else
ec5b6c9c MAL	323	WaitForSingleObject(cioc->pid, INFINITE);
195e14d0	324	#endif
fe823b6f	325
195e14d0 DB	326	if (rv < 0) {
	327	error_setg_errno(errp, errno, "%s",
	328	"Unable to close command");
	329	}
	330	return rv;
	331	}
	332
	333
bf88c124	334	static void qio_channel_command_set_aio_fd_handler(QIOChannel *ioc,
06e0f098	335	AioContext *read_ctx,
bf88c124	336	IOHandler *io_read,
06e0f098	337	AioContext *write_ctx,
bf88c124 PB	338	IOHandler *io_write,
	339	void *opaque)
	340	{
	341	QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
06e0f098 SH	342
	343	qio_channel_util_set_aio_fd_handler(cioc->readfd, read_ctx, io_read,
	344	cioc->writefd, write_ctx, io_write,
	345	opaque);
bf88c124 PB	346	}
	347
	348
195e14d0 DB	349	static GSource qio_channel_command_create_watch(QIOChannel ioc,
	350	GIOCondition condition)
	351	{
	352	QIOChannelCommand *cioc = QIO_CHANNEL_COMMAND(ioc);
	353	return qio_channel_create_fd_pair_watch(ioc,
	354	cioc->readfd,
	355	cioc->writefd,
	356	condition);
	357	}
	358
	359
	360	static void qio_channel_command_class_init(ObjectClass *klass,
	361	void *class_data G_GNUC_UNUSED)
	362	{
	363	QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
	364
	365	ioc_klass->io_writev = qio_channel_command_writev;
	366	ioc_klass->io_readv = qio_channel_command_readv;
	367	ioc_klass->io_set_blocking = qio_channel_command_set_blocking;
	368	ioc_klass->io_close = qio_channel_command_close;
	369	ioc_klass->io_create_watch = qio_channel_command_create_watch;
bf88c124	370	ioc_klass->io_set_aio_fd_handler = qio_channel_command_set_aio_fd_handler;
195e14d0 DB	371	}
	372
	373	static const TypeInfo qio_channel_command_info = {
	374	.parent = TYPE_QIO_CHANNEL,
	375	.name = TYPE_QIO_CHANNEL_COMMAND,
	376	.instance_size = sizeof(QIOChannelCommand),
	377	.instance_init = qio_channel_command_init,
	378	.instance_finalize = qio_channel_command_finalize,
	379	.class_init = qio_channel_command_class_init,
	380	};
	381
	382	static void qio_channel_command_register_types(void)
	383	{
	384	type_register_static(&qio_channel_command_info);
	385	}
	386
	387	type_init(qio_channel_command_register_types);