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#ident "$Id$"
/* ----------------------------------------------------------------------- *
*
* lookup_yp.c - module for Linux automountd to access a YP (NIS)
* automount map
*
* Copyright 1997 Transmeta Corporation - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
* USA; either version 2 of the License, or (at your option) any later
* version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
#include <stdio.h>
#include <malloc.h>
#include <errno.h>
#include <unistd.h>
#include <syslog.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpcsvc/yp_prot.h>
#include <rpcsvc/ypclnt.h>
#define MODULE_LOOKUP
#include "automount.h"
#define MAPFMT_DEFAULT "sun"
#define MODPREFIX "lookup(yp): "
struct lookup_context {
const char *domainname;
const char *mapname;
struct parse_mod *parse;
};
int lookup_version = AUTOFS_LOOKUP_VERSION; /* Required by protocol */
int lookup_init(const char *mapfmt, int argc, const char * const *argv,
void **context)
{
struct lookup_context *ctxt;
int err;
if ( !(*context = ctxt = malloc(sizeof(struct lookup_context))) ) {
syslog(LOG_CRIT, MODPREFIX "%m");
return 1;
}
if ( argc < 1 ) {
syslog(LOG_CRIT, MODPREFIX "No map name");
return 1;
}
ctxt->mapname = argv[0];
/* This should, but doesn't, take a const char ** */
err = yp_get_default_domain((char **) &ctxt->domainname);
if ( err ) {
syslog(LOG_CRIT, MODPREFIX "map %s: %s\n", ctxt->mapname, yperr_string(err));
return 1;
}
if ( !mapfmt )
mapfmt = MAPFMT_DEFAULT;
return !(ctxt->parse = open_parse(mapfmt,MODPREFIX,argc-1,argv+1));
}
int lookup_mount(const char *root, const char *name,
int name_len, void *context)
{
struct lookup_context *ctxt = (struct lookup_context *) context;
char *mapent;
int mapent_len;
int err, rv;
syslog(LOG_DEBUG, MODPREFIX "looking up %s", name);
/* For reasons unknown, the standard YP definitions doesn't define input
strings as const char *. However, my understanding is that they will
not be modified by the library. */
err = yp_match((char *) ctxt->domainname, (char *) ctxt->mapname,
(char *) name, name_len, &mapent, &mapent_len);
if ( err == YPERR_KEY ) {
/* Try to get the "*" entry if there is one - note that we *don't*
modify "name" so & -> the name we used, not "*" */
err = yp_match((char *) ctxt->domainname, (char *) ctxt->mapname,
"*", 1, &mapent, &mapent_len);
}
if ( err ) {
syslog(LOG_NOTICE, MODPREFIX "lookup for %s failed: %s", name, yperr_string(err));
return 1;
}
mapent[mapent_len] = '\0';
syslog(LOG_DEBUG, MODPREFIX "%s -> %s", name, mapent);
rv = ctxt->parse->parse_mount(root,name,name_len,mapent,ctxt->parse->context);
free(mapent);
return rv;
}
int lookup_done(void *context)
{
struct lookup_context *ctxt = (struct lookup_context *) context;
int rv = close_parse(ctxt->parse);
free(ctxt);
return rv;
}
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