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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2003 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by
* Jacques A. Vidrine, Safeport Network Services, and Network
* Associates Laboratories, the Security Research Division of Network
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* Compatibility shims for the GNU C Library-style nsswitch interface.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <sys/param.h>
#include <errno.h>
#include <nss.h>
#include <pthread.h>
#include <pthread_np.h>
#include "un-namespace.h"
#include "libc_private.h"
struct group;
struct passwd;
static int terminator;
#define DECLARE_TERMINATOR(x) \
static pthread_key_t _term_key_##x; \
static void \
_term_create_##x(void) \
{ \
(void)_pthread_key_create(&_term_key_##x, NULL); \
} \
static void *_term_main_##x; \
static pthread_once_t _term_once_##x = PTHREAD_ONCE_INIT
#define SET_TERMINATOR(x, y) \
do { \
if (!__isthreaded || _pthread_main_np()) \
_term_main_##x = (y); \
else { \
(void)_pthread_once(&_term_once_##x, _term_create_##x); \
(void)_pthread_setspecific(_term_key_##x, y); \
} \
} while (0)
#define CHECK_TERMINATOR(x) \
(!__isthreaded || _pthread_main_np() ? \
(_term_main_##x) : \
((void)_pthread_once(&_term_once_##x, _term_create_##x), \
_pthread_getspecific(_term_key_##x)))
DECLARE_TERMINATOR(group);
int __nss_compat_getgrnam_r(void *retval, void *mdata, va_list ap);
int __nss_compat_getgrgid_r(void *retval, void *mdata, va_list ap);
int __nss_compat_getgrent_r(void *retval, void *mdata, va_list ap);
int __nss_compat_setgrent(void *retval, void *mdata, va_list ap);
int __nss_compat_endgrent(void *retval, void *mdata, va_list ap);
int __nss_compat_getpwnam_r(void *retval, void *mdata, va_list ap);
int __nss_compat_getpwuid_r(void *retval, void *mdata, va_list ap);
int __nss_compat_getpwent_r(void *retval, void *mdata, va_list ap);
int __nss_compat_setpwent(void *retval, void *mdata, va_list ap);
int __nss_compat_endpwent(void *retval, void *mdata, va_list ap);
int
__nss_compat_getgrnam_r(void *retval, void *mdata, va_list ap)
{
int (*fn)(const char *, struct group *, char *, size_t, int *);
const char *name;
struct group *grp;
char *buffer;
int *errnop, ns_status;
size_t bufsize;
enum nss_status nss_status;
fn = mdata;
name = va_arg(ap, const char *);
grp = va_arg(ap, struct group *);
buffer = va_arg(ap, char *);
bufsize = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
nss_status = fn(name, grp, buffer, bufsize, errnop);
ns_status = __nss_compat_result(nss_status, *errnop);
if (ns_status == NS_SUCCESS)
*(struct group **)retval = grp;
return (ns_status);
}
int
__nss_compat_getgrgid_r(void *retval, void *mdata, va_list ap)
{
int (*fn)(gid_t, struct group *, char *, size_t, int *);
gid_t gid;
struct group *grp;
char *buffer;
int *errnop, ns_status;
size_t bufsize;
enum nss_status nss_status;
fn = mdata;
gid = va_arg(ap, gid_t);
grp = va_arg(ap, struct group *);
buffer = va_arg(ap, char *);
bufsize = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
nss_status = fn(gid, grp, buffer, bufsize, errnop);
ns_status = __nss_compat_result(nss_status, *errnop);
if (ns_status == NS_SUCCESS)
*(struct group **)retval = grp;
return (ns_status);
}
int
__nss_compat_getgrent_r(void *retval, void *mdata, va_list ap)
{
int (*fn)(struct group *, char *, size_t, int *);
struct group *grp;
char *buffer;
int *errnop, ns_status;
size_t bufsize;
enum nss_status nss_status;
if (CHECK_TERMINATOR(group))
return (NS_NOTFOUND);
fn = mdata;
grp = va_arg(ap, struct group *);
buffer = va_arg(ap, char *);
bufsize = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
nss_status = fn(grp, buffer, bufsize, errnop);
ns_status = __nss_compat_result(nss_status, *errnop);
if (ns_status == NS_SUCCESS)
*(struct group **)retval = grp;
else if (ns_status != NS_RETURN)
SET_TERMINATOR(group, &terminator);
return (ns_status);
}
int
__nss_compat_setgrent(void *retval, void *mdata, va_list ap)
{
SET_TERMINATOR(group, NULL);
((int (*)(void))mdata)();
return (NS_UNAVAIL);
}
int
__nss_compat_endgrent(void *retval, void *mdata, va_list ap)
{
SET_TERMINATOR(group, NULL);
((int (*)(void))mdata)();
return (NS_UNAVAIL);
}
DECLARE_TERMINATOR(passwd);
int
__nss_compat_getpwnam_r(void *retval, void *mdata, va_list ap)
{
int (*fn)(const char *, struct passwd *, char *, size_t, int *);
const char *name;
struct passwd *pwd;
char *buffer;
int *errnop, ns_status;
size_t bufsize;
enum nss_status nss_status;
fn = mdata;
name = va_arg(ap, const char *);
pwd = va_arg(ap, struct passwd *);
buffer = va_arg(ap, char *);
bufsize = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
nss_status = fn(name, pwd, buffer, bufsize, errnop);
ns_status = __nss_compat_result(nss_status, *errnop);
if (ns_status == NS_SUCCESS)
*(struct passwd **)retval = pwd;
return (ns_status);
}
int
__nss_compat_getpwuid_r(void *retval, void *mdata, va_list ap)
{
int (*fn)(uid_t, struct passwd *, char *, size_t, int *);
uid_t uid;
struct passwd *pwd;
char *buffer;
int *errnop, ns_status;
size_t bufsize;
enum nss_status nss_status;
fn = mdata;
uid = va_arg(ap, uid_t);
pwd = va_arg(ap, struct passwd *);
buffer = va_arg(ap, char *);
bufsize = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
nss_status = fn(uid, pwd, buffer, bufsize, errnop);
ns_status = __nss_compat_result(nss_status, *errnop);
if (ns_status == NS_SUCCESS)
*(struct passwd **)retval = pwd;
return (ns_status);
}
int
__nss_compat_getpwent_r(void *retval, void *mdata, va_list ap)
{
int (*fn)(struct passwd *, char *, size_t, int *);
struct passwd *pwd;
char *buffer;
int *errnop, ns_status;
size_t bufsize;
enum nss_status nss_status;
if (CHECK_TERMINATOR(passwd))
return (NS_NOTFOUND);
fn = mdata;
pwd = va_arg(ap, struct passwd *);
buffer = va_arg(ap, char *);
bufsize = va_arg(ap, size_t);
errnop = va_arg(ap, int *);
nss_status = fn(pwd, buffer, bufsize, errnop);
ns_status = __nss_compat_result(nss_status, *errnop);
if (ns_status == NS_SUCCESS)
*(struct passwd **)retval = pwd;
else if (ns_status != NS_RETURN)
SET_TERMINATOR(passwd, &terminator);
return (ns_status);
}
int
__nss_compat_setpwent(void *retval, void *mdata, va_list ap)
{
SET_TERMINATOR(passwd, NULL);
((int (*)(void))mdata)();
return (NS_UNAVAIL);
}
int
__nss_compat_endpwent(void *retval, void *mdata, va_list ap)
{
SET_TERMINATOR(passwd, NULL);
((int (*)(void))mdata)();
return (NS_UNAVAIL);
}
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