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60 lines
2.0 KiB
C
60 lines
2.0 KiB
C
/*
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* Copyright (C) 2011 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_DAEMON_COMMON_CLIENT_H
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#define _LVM_DAEMON_COMMON_CLIENT_H
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typedef struct {
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int socket_fd; /* the fd we use to talk to the daemon */
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int protocol; /* version of the protocol the daemon uses */
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char *read_buf;
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} daemon_handle;
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typedef struct {
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const char *path; /* the binary of the daemon */
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const char *socket; /* path to the comms socket */
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unsigned autostart:1; /* start the daemon if not running? */
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} daemon_info;
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typedef struct {
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char *request;
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} daemon_request;
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typedef struct {
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int error; /* 0 for success */
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char *reply; /* textual reply */
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struct config_tree *cft; /* parsed reply, if available */
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} daemon_reply;
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/*
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* Open the communication channel to the daemon. If the daemon is not running,
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* it may be autostarted based on the binary path provided in the info (this
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* will only happen if autostart is set to true). If the call fails for any
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* reason, daemon_handle_valid(h) for the response will return false. Otherwise,
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* the connection is good to start serving requests.
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*/
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daemon_handle daemon_open(daemon_info i);
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/*
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* Send a request to the daemon, waiting for the reply. All communication with
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* the daemon is synchronous. The function handles the IO details and parses the
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* response, handling common error conditions. See "daemon_reply" for details.
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*/
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daemon_reply daemon_send(daemon_handle h, daemon_request r);
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/* Shut down the communication to the daemon. Compulsory. */
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void daemon_close(daemon_handle h);
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#endif
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