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check for ypbind.lock file, which indicates yp is alive.

This commit is contained in:
deraadt 1994-09-28 01:38:06 +00:00
parent 9d7bdbb0c4
commit d87a87c753
1 changed files with 14 additions and 6 deletions
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20
lib/libc/yp/yplib.c
View File

@ -30,7 +30,7 @@
*/
#ifndef LINT
static char *rcsid = "$Id: yplib.c,v 1.12 1994/09/20 07:20:36 deraadt Exp $";
static char *rcsid = "$Id: yplib.c,v 1.13 1994/09/28 01:38:06 deraadt Exp $";
#endif
#include <sys/param.h>
@ -48,9 +48,8 @@ static char *rcsid = "$Id: yplib.c,v 1.12 1994/09/20 07:20:36 deraadt Exp $";
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#ifndef BINDINGDIR
#define BINDINGDIR "/var/yp/binding"
#endif
#define BINDINGDIR "/var/yp/binding"
#define YPBINDLOCK "/var/run/ypbind.lock"
#define YPMATCHCACHE
extern bool_t xdr_domainname(), xdr_ypbind_resp();
@ -186,6 +185,17 @@ struct dom_binding **ypdb;
int new=0, r;
int count = 0;
/*
* test if YP is running or not
*/
if ((fd=open(YPBINDLOCK, O_RDONLY)) == -1)
return YPERR_YPBIND;
if( !(flock(fd, LOCK_EX|LOCK_NB) == -1 && errno==EWOULDBLOCK)) {
close(fd);
return YPERR_YPBIND;
}
close(fd);
gpid = getpid();
if( !(pid==-1 || pid==gpid) ) {
ysd = _ypbindlist;
@ -217,7 +227,6 @@ struct dom_binding **ypdb;
new = 1;
}
again:
#ifdef BINDINGDIR
if(ysd->dom_vers==0) {
sprintf(path, "%s/%s.%d", BINDINGDIR, dom, 2);
if( (fd=open(path, O_RDONLY)) == -1) {
@ -261,7 +270,6 @@ again:
}
}
trynet:
#endif
if(ysd->dom_vers==-1 || ysd->dom_vers==0) {
memset(&clnt_sin, 0, sizeof clnt_sin);
clnt_sin.sin_family = AF_INET;