bcdf933fad
try to fork() a child of its own, which could result in several children ypservs running at once. I'm still not sure exactly what leads to this condition, but these fixes should stop it from causing trouble. A new function, yp_fork() checks to see if the current process is already a child of the parent ypserv, and returns failure (and logs an error message) rather than spawning another child.
116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
/*
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* Copyright (c) 1995
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* Bill Paul <wpaul@ctr.columbia.edu>. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul 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
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* OR 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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* $Id: yp_extern.h,v 1.12 1997/10/29 07:25:03 charnier Exp $
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*/
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#include <db.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/yp.h>
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#ifndef _PATH_YP
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#define _PATH_YP "/var/yp/"
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#endif
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#ifndef _PATH_LIBEXEC
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#define _PATH_LIBEXEC "/usr/libexec/"
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#endif
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#ifndef MAX_CHILDREN
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#define MAX_CHILDREN 20
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#endif
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#define YP_SECURE 0x1
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#define YP_INTERDOMAIN 0x2
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/*
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* External functions and variables.
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*/
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extern int debug;
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extern int ypdb_debug;
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extern int do_dns;
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extern int children;
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extern int resfd;
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extern char *progname;
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extern char *yp_dir;
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extern pid_t yp_pid;
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extern enum ypstat yp_errno;
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extern void yp_error __P((const char *, ...));
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#ifdef DB_CACHE
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extern int yp_get_record __P(( DB *, const DBT *, DBT *, int));
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#else
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extern int yp_get_record __P(( const char *, const char *, const DBT *, DBT *, int));
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#endif
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extern int yp_first_record __P((const DB *, DBT *, DBT *, int));
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extern int yp_next_record __P((const DB *, DBT *, DBT *, int, int));
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extern char *yp_dnsname __P(( char * ));
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extern char *yp_dnsaddr __P(( const char * ));
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#ifdef DB_CACHE
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extern int yp_access __P((const char *, const char *, const struct svc_req * ));
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#else
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extern int yp_access __P((const char *, const struct svc_req * ));
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#endif
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extern int yp_validdomain __P((const char * ));
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extern DB *yp_open_db __P(( const char *, const char *));
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extern DB *yp_open_db_cache __P(( const char *, const char *, const char *, int ));
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extern void yp_flush_all __P(( void ));
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extern void yp_init_dbs __P(( void ));
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extern int yp_testflag __P(( char *, char *, int ));
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extern void load_securenets __P(( void ));
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#ifdef DB_CACHE
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extern ypstat yp_select_map __P(( char *, char *, keydat *, int ));
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extern ypstat yp_getbykey __P(( keydat *, valdat * ));
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extern ypstat yp_firstbykey __P(( keydat *, valdat * ));
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extern ypstat yp_nextbykey __P(( keydat *, valdat * ));
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#endif
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extern unsigned long svcudp_set_xid __P(( SVCXPRT *, unsigned long ));
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extern unsigned long svcudp_get_xid __P(( SVCXPRT * ));
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#ifndef RESOLVER_TIMEOUT
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#define RESOLVER_TIMEOUT 3600
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#endif
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extern int yp_init_resolver __P(( void ));
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extern void yp_run_dnsq __P(( void ));
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extern void yp_prune_dnsq __P(( void ));
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extern ypstat yp_async_lookup_name __P(( struct svc_req *, char * ));
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extern ypstat yp_async_lookup_addr __P(( struct svc_req *, char * ));
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