100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/* $NetBSD: rumpclient.h,v 1.10 2011/02/16 22:35:41 tron Exp $ */
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/*-
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* Copyright (c) 2010 Antti Kantee. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _RUMP_RUMPCLIENT_H_
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#define _RUMP_RUMPCLIENT_H_
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#include <sys/types.h>
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#include <sys/null.h>
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struct rumpclient_fork;
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#define rumpclient_vfork() rumpclient__dofork(vfork)
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__BEGIN_DECLS
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int rumpclient_syscall(int, const void *, size_t, register_t *);
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int rumpclient_init(void);
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struct rumpclient_fork *rumpclient_prefork(void);
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int rumpclient_fork_init(struct rumpclient_fork *);
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void rumpclient_fork_cancel(struct rumpclient_fork *);
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void rumpclient_fork_vparent(struct rumpclient_fork *);
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pid_t rumpclient_fork(void);
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int rumpclient_exec(const char *, char *const [], char *const[]);
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int rumpclient_daemon(int, int);
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#define RUMPCLIENT_RETRYCONN_INFTIME ((time_t)-1)
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#define RUMPCLIENT_RETRYCONN_ONCE ((time_t)-2)
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#define RUMPCLIENT_RETRYCONN_DIE ((time_t)-3)
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void rumpclient_setconnretry(time_t);
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enum rumpclient_closevariant {
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RUMPCLIENT_CLOSE_CLOSE,
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RUMPCLIENT_CLOSE_DUP2,
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RUMPCLIENT_CLOSE_FCLOSEM
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};
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int rumpclient__closenotify(int *, enum rumpclient_closevariant);
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/*
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* vfork needs to be implemented as an inline to make everything
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* run in the caller's stackframe.
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*/
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static inline pid_t
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rumpclient__dofork(pid_t (*forkfn)(void))
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{
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struct rumpclient_fork *rf;
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pid_t pid;
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int childran = 0;
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if ((rf = rumpclient_prefork()) == NULL)
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return -1;
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switch ((pid = forkfn())) {
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case -1:
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rumpclient_fork_cancel(rf);
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break;
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case 0:
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childran = 1;
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if (rumpclient_fork_init(rf) == -1)
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pid = -1;
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break;
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default:
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/* XXX: multithreaded vforker? do they exist? */
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if (childran)
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rumpclient_fork_vparent(rf);
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break;
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}
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return pid;
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}
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__END_DECLS
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#endif /* _RUMP_RUMPCLIENT_H_ */
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