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 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 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