1 /* $NetBSD: svc_run.c,v 1.22 2013/03/11 20:19:29 tron Exp $ */
2
3 /*
4 * Copyright (c) 2010, Oracle America, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met:
9 *
10 * * Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials
15 * provided with the distribution.
16 * * Neither the name of the "Oracle America, Inc." nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include <sys/cdefs.h>
35 #if defined(LIBC_SCCS) && !defined(lint)
36 #if 0
37 static char *sccsid = "@(#)svc_run.c 1.1 87/10/13 Copyr 1984 Sun Micro";
38 static char *sccsid = "@(#)svc_run.c 2.1 88/07/29 4.0 RPCSRC";
39 #else
40 __RCSID("$NetBSD: svc_run.c,v 1.22 2013/03/11 20:19:29 tron Exp $");
41 #endif
42 #endif
43
44 /*
45 * This is the rpc server side idle loop
46 * Wait for input, call server program.
47 */
48 #include "namespace.h"
49 #include "reentrant.h"
50 #include <err.h>
51 #include <errno.h>
52 #include <stdio.h>
53 #include <string.h>
54 #include <unistd.h>
55
56 #include <rpc/rpc.h>
57
58 #include "svc_fdset.h"
59 #include "rpc_internal.h"
60
61 #ifdef __weak_alias
__weak_alias(svc_run,_svc_run)62 __weak_alias(svc_run,_svc_run)
63 __weak_alias(svc_exit,_svc_exit)
64 #endif
65
66 void
67 svc_run(void)
68 {
69 fd_set readfds, cleanfds;
70 struct timeval timeout;
71 int maxfd;
72 #ifndef RUMP_RPC
73 int probs = 0;
74 #endif
75 #ifdef _REENTRANT
76 extern rwlock_t svc_fd_lock;
77 #endif
78
79 timeout.tv_sec = 30;
80 timeout.tv_usec = 0;
81
82 for (;;) {
83 rwlock_rdlock(&svc_fd_lock);
84 readfds = *get_fdset();
85 cleanfds = *get_fdset();
86 maxfd = *get_fdsetmax();
87 rwlock_unlock(&svc_fd_lock);
88 switch (select(maxfd + 1, &readfds, NULL, NULL, &timeout)) {
89 case -1:
90 #ifndef RUMP_RPC
91 if ((errno == EINTR || errno == EBADF) && probs < 100) {
92 probs++;
93 continue;
94 }
95 #endif
96 if (errno == EINTR) {
97 continue;
98 }
99 warn("%s: select failed", __func__);
100 return;
101 case 0:
102 __svc_clean_idle(&cleanfds, 30, FALSE);
103 continue;
104 default:
105 svc_getreqset(&readfds);
106 #ifndef RUMP_RPC
107 probs = 0;
108 #endif
109 }
110 }
111 }
112
113 /*
114 * This function causes svc_run() to exit by telling it that it has no
115 * more work to do.
116 */
117 void
svc_exit(void)118 svc_exit(void)
119 {
120 #ifdef _REENTRANT
121 extern rwlock_t svc_fd_lock;
122 #endif
123
124 rwlock_wrlock(&svc_fd_lock);
125 FD_ZERO(get_fdset());
126 rwlock_unlock(&svc_fd_lock);
127 }
128