256 lines
6.4 KiB
C
256 lines
6.4 KiB
C
/* $NetBSD: nsdispatch.c,v 1.9 1999/01/25 00:16:17 lukem Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997, 1998, 1999 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Luke Mewburn.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "namespace.h"
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#define _NS_PRIVATE
|
|
#include <nsswitch.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "un-namespace.h"
|
|
|
|
/*
|
|
* default sourcelist: `files'
|
|
*/
|
|
const ns_src __nsdefaultsrc[] = {
|
|
{ NSSRC_FILES, NS_SUCCESS },
|
|
{ 0 },
|
|
};
|
|
|
|
|
|
static int _nsmapsize = 0;
|
|
static ns_dbt *_nsmap = NULL;
|
|
|
|
/*
|
|
* size of dynamic array chunk for _nsmap and _nsmap[x].srclist
|
|
*/
|
|
#define NSELEMSPERCHUNK 8
|
|
|
|
|
|
int _nscmp(const void *, const void *);
|
|
|
|
|
|
int
|
|
_nscmp(a, b)
|
|
const void *a;
|
|
const void *b;
|
|
{
|
|
return (strcasecmp(((const ns_dbt *)a)->name,
|
|
((const ns_dbt *)b)->name));
|
|
}
|
|
|
|
|
|
void
|
|
_nsdbtaddsrc(dbt, src)
|
|
ns_dbt *dbt;
|
|
const ns_src *src;
|
|
{
|
|
if ((dbt->srclistsize % NSELEMSPERCHUNK) == 0) {
|
|
dbt->srclist = (ns_src *)realloc(dbt->srclist,
|
|
(dbt->srclistsize + NSELEMSPERCHUNK) * sizeof(ns_src));
|
|
if (dbt->srclist == NULL)
|
|
_err(1, "nsdispatch: memory allocation failure");
|
|
}
|
|
memmove(&dbt->srclist[dbt->srclistsize++], src, sizeof(ns_src));
|
|
}
|
|
|
|
|
|
void
|
|
_nsdbtdump(dbt)
|
|
const ns_dbt *dbt;
|
|
{
|
|
int i;
|
|
|
|
printf("%s (%d source%s):", dbt->name, dbt->srclistsize,
|
|
dbt->srclistsize == 1 ? "" : "s");
|
|
for (i = 0; i < dbt->srclistsize; i++) {
|
|
printf(" %s", dbt->srclist[i].name);
|
|
if (!(dbt->srclist[i].flags &
|
|
(NS_UNAVAIL|NS_NOTFOUND|NS_TRYAGAIN)) &&
|
|
(dbt->srclist[i].flags & NS_SUCCESS))
|
|
continue;
|
|
printf(" [");
|
|
if (!(dbt->srclist[i].flags & NS_SUCCESS))
|
|
printf(" SUCCESS=continue");
|
|
if (dbt->srclist[i].flags & NS_UNAVAIL)
|
|
printf(" UNAVAIL=return");
|
|
if (dbt->srclist[i].flags & NS_NOTFOUND)
|
|
printf(" NOTFOUND=return");
|
|
if (dbt->srclist[i].flags & NS_TRYAGAIN)
|
|
printf(" TRYAGAIN=return");
|
|
printf(" ]");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
|
|
const ns_dbt *
|
|
_nsdbtget(name)
|
|
const char *name;
|
|
{
|
|
static time_t confmod;
|
|
|
|
struct stat statbuf;
|
|
ns_dbt dbt;
|
|
|
|
extern FILE *_nsyyin;
|
|
extern int _nsyyparse(void);
|
|
|
|
dbt.name = name;
|
|
|
|
if (confmod) {
|
|
if (stat(_PATH_NS_CONF, &statbuf) == -1)
|
|
return (NULL);
|
|
if (confmod < statbuf.st_mtime) {
|
|
int i, j;
|
|
|
|
for (i = 0; i < _nsmapsize; i++) {
|
|
for (j = 0; j < _nsmap[i].srclistsize; j++) {
|
|
if (_nsmap[i].srclist[j].name != NULL) {
|
|
/*LINTED const cast*/
|
|
free((void *)
|
|
_nsmap[i].srclist[j].name);
|
|
}
|
|
}
|
|
if (_nsmap[i].srclist)
|
|
free(_nsmap[i].srclist);
|
|
if (_nsmap[i].name) {
|
|
/*LINTED const cast*/
|
|
free((void *)_nsmap[i].name);
|
|
}
|
|
}
|
|
if (_nsmap)
|
|
free(_nsmap);
|
|
_nsmap = NULL;
|
|
_nsmapsize = 0;
|
|
confmod = 0;
|
|
}
|
|
}
|
|
if (!confmod) {
|
|
if (stat(_PATH_NS_CONF, &statbuf) == -1)
|
|
return (NULL);
|
|
_nsyyin = fopen(_PATH_NS_CONF, "r");
|
|
if (_nsyyin == NULL)
|
|
return (NULL);
|
|
_nsyyparse();
|
|
(void)fclose(_nsyyin);
|
|
qsort(_nsmap, (size_t)_nsmapsize, sizeof(ns_dbt), _nscmp);
|
|
confmod = statbuf.st_mtime;
|
|
}
|
|
return (bsearch(&dbt, _nsmap, (size_t)_nsmapsize, sizeof(ns_dbt),
|
|
_nscmp));
|
|
}
|
|
|
|
|
|
void
|
|
_nsdbtput(dbt)
|
|
const ns_dbt *dbt;
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < _nsmapsize; i++) {
|
|
if (_nscmp(dbt, &_nsmap[i]) == 0) {
|
|
/* overwrite existing entry */
|
|
if (_nsmap[i].srclist != NULL)
|
|
free(_nsmap[i].srclist);
|
|
memmove(&_nsmap[i], dbt, sizeof(ns_dbt));
|
|
return;
|
|
}
|
|
}
|
|
|
|
if ((_nsmapsize % NSELEMSPERCHUNK) == 0) {
|
|
_nsmap = (ns_dbt *)realloc(_nsmap,
|
|
(_nsmapsize + NSELEMSPERCHUNK) * sizeof(ns_dbt));
|
|
if (_nsmap == NULL)
|
|
_err(1, "nsdispatch: memory allocation failure");
|
|
}
|
|
memmove(&_nsmap[_nsmapsize++], dbt, sizeof(ns_dbt));
|
|
}
|
|
|
|
|
|
int
|
|
nsdispatch(void *retval, const ns_dtab disp_tab[], const char *database,
|
|
const char *method, const ns_src defaults[], ...)
|
|
{
|
|
va_list ap;
|
|
int i, curdisp, result;
|
|
const ns_dbt *dbt;
|
|
const ns_src *srclist;
|
|
int srclistsize;
|
|
|
|
dbt = _nsdbtget(database);
|
|
if (dbt != NULL) {
|
|
srclist = dbt->srclist;
|
|
srclistsize = dbt->srclistsize;
|
|
} else {
|
|
srclist = defaults;
|
|
srclistsize = 0;
|
|
while (srclist[srclistsize].name != NULL)
|
|
srclistsize++;
|
|
}
|
|
result = 0;
|
|
|
|
for (i = 0; i < srclistsize; i++) {
|
|
for (curdisp = 0; disp_tab[curdisp].src != NULL; curdisp++)
|
|
if (strcasecmp(disp_tab[curdisp].src,
|
|
srclist[i].name) == 0)
|
|
break;
|
|
result = 0;
|
|
if (disp_tab[curdisp].callback) {
|
|
va_start(ap, defaults);
|
|
result = disp_tab[curdisp].callback(retval,
|
|
disp_tab[curdisp].cb_data, ap);
|
|
va_end(ap);
|
|
if (result & srclist[i].flags) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return (result ? result : NS_NOTFOUND);
|
|
}
|