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2000-12-05  H.J. Lu  <hjl@gnu.org>

	* nss/Makefile (routines): Add getnssent and getnssent_r.
	* nss/nsswitch.h (__nss_setent): New internal NSS function.
	(__nss_endent): Likewise.
	(__nss_getent_r): Likewise.
	(__nss_getent): Likewise.
	* nss/getnssent_r.c: New file.
	* nss/getnssent.c: New file.
	* nss/getXXent.c (H_ERRNO_VAR): Updated.
	(GETFUNC_NAME): Updated to call __nss_getent ().
	* nss/getXXent_r.c (H_ERRNO_VAR_P): New.
	(STAYOPEN_TMPVAR): Updated.
	(STAYOPEN_VAR): Updated.
	(SETFUNC_NAME): Updated to call __nss_setent ().
	(ENDFUNC_NAME): Updated to call __nss_endent ().
	(INTERNAL (REENTRANT_GETNAME)): Updated to call __nss_getent_r ().
This commit is contained in:
Ulrich Drepper
2000-12-08 22:39:54 +00:00
parent 55f4412952
commit 8b80182964
6 changed files with 285 additions and 199 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
ChangeLog
View File

@@ -1,3 +1,21 @@
2000-12-05 H.J. Lu <hjl@gnu.org>
* nss/Makefile (routines): Add getnssent and getnssent_r.
* nss/nsswitch.h (__nss_setent): New internal NSS function.
(__nss_endent): Likewise.
(__nss_getent_r): Likewise.
(__nss_getent): Likewise.
* nss/getnssent_r.c: New file.
* nss/getnssent.c: New file.
* nss/getXXent.c (H_ERRNO_VAR): Updated.
(GETFUNC_NAME): Updated to call __nss_getent ().
* nss/getXXent_r.c (H_ERRNO_VAR_P): New.
(STAYOPEN_TMPVAR): Updated.
(STAYOPEN_VAR): Updated.
(SETFUNC_NAME): Updated to call __nss_setent ().
(ENDFUNC_NAME): Updated to call __nss_endent ().
(INTERNAL (REENTRANT_GETNAME)): Updated to call __nss_getent_r ().
2000-12-08 Andreas Jaeger <aj@suse.de> 2000-12-08 Andreas Jaeger <aj@suse.de>
* nscd/dbg_log.h (dbg_log): Correct attribute. * nscd/dbg_log.h (dbg_log): Correct attribute.

3
nss/Makefile
View File

@@ -27,7 +27,8 @@ distribute := nsswitch.h XXX-lookup.c getXXbyYY.c getXXbyYY_r.c \
nsswitch.conf digits_dots.c function.def nsswitch.conf digits_dots.c function.def
# This is the trivial part which goes into libc itself. # This is the trivial part which goes into libc itself.
routines = nsswitch $(addsuffix -lookup,$(databases)) routines = nsswitch getnssent getnssent_r \
$(addsuffix -lookup,$(databases))
# These are the databases that go through nss dispatch. # These are the databases that go through nss dispatch.
# Caution: if you add a database here, you must add its real name # Caution: if you add a database here, you must add its real name

40
nss/getXXent.c
View File

@@ -48,10 +48,10 @@
/* Sometimes we need to store error codes in the `h_errno' variable. */ /* Sometimes we need to store error codes in the `h_errno' variable. */
#ifdef NEED_H_ERRNO #ifdef NEED_H_ERRNO
# define H_ERRNO_PARM , int *h_errnop # define H_ERRNO_PARM , int *h_errnop
# define H_ERRNO_VAR , &h_errno # define H_ERRNO_VAR &h_errno
#else #else
# define H_ERRNO_PARM # define H_ERRNO_PARM
# define H_ERRNO_VAR # define H_ERRNO_VAR NULL
#endif #endif
/* Prototype of the reentrant version. */ /* Prototype of the reentrant version. */
@@ -77,42 +77,14 @@ GETFUNC_NAME (void)
/* Get lock. */ /* Get lock. */
__libc_lock_lock (lock); __libc_lock_lock (lock);
if (buffer == NULL) result = (LOOKUP_TYPE *)
{ __nss_getent ((getent_r_function) INTERNAL (REENTRANT_GETNAME),
buffer_size = BUFLEN; (void **) &resbuf, &buffer, BUFLEN, &buffer_size,
buffer = malloc (buffer_size); H_ERRNO_VAR);
}
while (buffer != NULL
&& INTERNAL (REENTRANT_GETNAME) (&resbuf, buffer, buffer_size, &result
H_ERRNO_VAR) == ERANGE
#ifdef NEED_H_ERRNO
&& h_errno == NETDB_INTERNAL
#endif
)
{
char *new_buf;
buffer_size += BUFLEN;
new_buf = realloc (buffer, buffer_size);
if (new_buf == NULL)
{
/* We are out of memory. Free the current buffer so that the
process gets a chance for a normal termination. */
save = errno;
free (buffer);
__set_errno (save);
}
buffer = new_buf;
}
if (buffer == NULL)
result = NULL;
/* Release lock. Preserve error value. */
save = errno; save = errno;
__libc_lock_unlock (lock); __libc_lock_unlock (lock);
__set_errno (save); __set_errno (save);
return result; return result;
} }

191
nss/getXXent_r.c
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@@ -22,10 +22,6 @@
#include "nsswitch.h" #include "nsswitch.h"
#ifdef NEED__RES
# include <resolv.h>
#endif
/*******************************************************************\ /*******************************************************************\
|* Here we assume several symbols to be defined: *| |* Here we assume several symbols to be defined: *|
|* *| |* *|
@@ -73,31 +69,26 @@
#ifdef NEED_H_ERRNO #ifdef NEED_H_ERRNO
# define H_ERRNO_PARM , int *h_errnop # define H_ERRNO_PARM , int *h_errnop
# define H_ERRNO_VAR , &h_errno # define H_ERRNO_VAR , &h_errno
# define H_ERRNO_VAR_P &h_errno
#else #else
# define H_ERRNO_PARM # define H_ERRNO_PARM
# define H_ERRNO_VAR # define H_ERRNO_VAR
# define H_ERRNO_VAR_P NULL
#endif #endif
/* Some databases take the `stayopen' flag. */ /* Some databases take the `stayopen' flag. */
#ifdef STAYOPEN #ifdef STAYOPEN
# define STAYOPEN_TMP CONCAT2_1 (STAYOPEN, _tmp) # define STAYOPEN_TMP CONCAT2_1 (STAYOPEN, _tmp)
# define STAYOPEN_TMPVAR CONCAT2_1 (STAYOPEN_VAR, _tmp) # define STAYOPEN_TMPVAR &CONCAT2_1 (STAYOPEN_VAR, _tmp)
#else #else
# define STAYOPEN void # define STAYOPEN void
# define STAYOPEN_VAR # define STAYOPEN_VAR 0
# define STAYOPEN_TMPVAR # define STAYOPEN_TMPVAR NULL
#endif #endif
/* Prototype for the setXXXent functions we use here. */ #ifndef NEED__RES
typedef enum nss_status (*set_function) (STAYOPEN); # define NEED__RES 0
#endif
/* Prototype for the endXXXent functions we use here. */
typedef enum nss_status (*end_function) (void);
/* Prototype for the setXXXent functions we use here. */
typedef enum nss_status (*get_function) (LOOKUP_TYPE *, char *, size_t, int *
H_ERRNO_PARM);
/* This handle for the NSS data base is shared between all /* This handle for the NSS data base is shared between all
set/get/endXXXent functions. */ set/get/endXXXent functions. */
@@ -119,103 +110,33 @@ __libc_lock_define_initialized (static, lock)
/* The lookup function for the first entry of this service. */ /* The lookup function for the first entry of this service. */
extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp); extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp);
/* Set up NIP to run through the services. If ALL is zero, use NIP's
current location if it's not nil. Return nonzero if there are no
services (left). */
static int
setup (void **fctp, const char *func_name, int all)
{
int no_more;
if (startp == NULL)
{
no_more = DB_LOOKUP_FCT (&nip, func_name, fctp);
startp = no_more ? (service_user *) -1l : nip;
}
else if (startp == (service_user *) -1l)
/* No services at all. */
return 1;
else
{
if (all || !nip)
/* Reset to the beginning of the service list. */
nip = startp;
/* Look up the first function. */
no_more = __nss_lookup (&nip, func_name, fctp);
}
return no_more;
}
void void
SETFUNC_NAME (STAYOPEN) SETFUNC_NAME (STAYOPEN)
{ {
set_function fct; int save;
int no_more;
#ifdef NEED__RES
if ((_res.options & RES_INIT) == 0 && __res_ninit (&_res) == -1)
{
__set_h_errno (NETDB_INTERNAL);
return;
}
#endif /* need _res */
__libc_lock_lock (lock); __libc_lock_lock (lock);
__nss_setent (SETFUNC_NAME_STRING, DB_LOOKUP_FCT, &nip, &startp,
&last_nip, STAYOPEN_VAR, STAYOPEN_TMPVAR, NEED__RES);
/* Cycle through the services and run their `setXXent' functions until save = errno;
we find an available service. */
no_more = setup ((void **) &fct, SETFUNC_NAME_STRING, 1);
while (! no_more)
{
int is_last_nip = nip == last_nip;
enum nss_status status = DL_CALL_FCT (fct, (STAYOPEN_VAR));
no_more = __nss_next (&nip, SETFUNC_NAME_STRING, (void **) &fct,
status, 0);
if (is_last_nip)
last_nip = nip;
}
#ifdef STAYOPEN_TMP
STAYOPEN_TMPVAR = STAYOPEN_VAR;
#endif
__libc_lock_unlock (lock); __libc_lock_unlock (lock);
__set_errno (save);
} }
void void
ENDFUNC_NAME (void) ENDFUNC_NAME (void)
{ {
end_function fct; int save;
int no_more;
#ifdef NEED__RES
if ((_res.options & RES_INIT) == 0 && __res_ninit (&_res) == -1)
{
__set_h_errno (NETDB_INTERNAL);
return;
}
#endif /* need _res */
__libc_lock_lock (lock); __libc_lock_lock (lock);
__nss_endent (ENDFUNC_NAME_STRING, DB_LOOKUP_FCT, &nip, &startp,
/* Cycle through all the services and run their endXXent functions. */ &last_nip, NEED__RES);
no_more = setup ((void **) &fct, ENDFUNC_NAME_STRING, 1); save = errno;
while (! no_more)
{
/* Ignore status, we force check in __NSS_NEXT. */
DL_CALL_FCT (fct, ());
if (nip == last_nip)
/* We have processed all services which were used. */
break;
no_more = __nss_next (&nip, ENDFUNC_NAME_STRING, (void **) &fct, 0, 1);
}
last_nip = nip = NULL;
__libc_lock_unlock (lock); __libc_lock_unlock (lock);
__set_errno (save);
} }
@@ -223,76 +144,18 @@ int
INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen, INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer, size_t buflen,
LOOKUP_TYPE **result H_ERRNO_PARM) LOOKUP_TYPE **result H_ERRNO_PARM)
{ {
get_function fct; int status;
int no_more; int save;
enum nss_status status;
#ifdef NEED__RES
if ((_res.options & RES_INIT) == 0 && __res_ninit (&_res) == -1)
{
__set_h_errno (NETDB_INTERNAL);
*result = NULL;
return errno;
}
#endif /* need _res */
/* Initialize status to return if no more functions are found. */
status = NSS_STATUS_NOTFOUND;
__libc_lock_lock (lock); __libc_lock_lock (lock);
status = __nss_getent_r (GETFUNC_NAME_STRING, SETFUNC_NAME_STRING,
/* Run through available functions, starting with the same function last DB_LOOKUP_FCT, &nip, &startp, &last_nip,
run. We will repeat each function as long as it succeeds, and then go STAYOPEN_TMPVAR, NEED__RES, resbuf, buffer,
on to the next service action. */ buflen, (void **) result, H_ERRNO_VAR_P);
no_more = setup ((void **) &fct, GETFUNC_NAME_STRING, 0); save = errno;
while (! no_more)
{
int is_last_nip = nip == last_nip;
status = DL_CALL_FCT (fct,
(resbuf, buffer, buflen, &errno H_ERRNO_VAR));
/* The the status is NSS_STATUS_TRYAGAIN and errno is ERANGE the
provided buffer is too small. In this case we should give
the user the possibility to enlarge the buffer and we should
not simply go on with the next service (even if the TRYAGAIN
action tells us so). */
if (status == NSS_STATUS_TRYAGAIN
#ifdef NEED_H_ERRNO
&& *h_errnop == NETDB_INTERNAL
#endif
&& errno == ERANGE)
break;
do
{
no_more = __nss_next (&nip, GETFUNC_NAME_STRING, (void **) &fct,
status, 0);
if (is_last_nip)
last_nip = nip;
if (! no_more)
{
/* Call the `setXXent' function. This wasn't done before. */
set_function sfct;
no_more = __nss_lookup (&nip, SETFUNC_NAME_STRING,
(void **) &sfct);
if (! no_more)
status = DL_CALL_FCT (sfct, (STAYOPEN_TMPVAR));
else
status = NSS_STATUS_NOTFOUND;
}
}
while (! no_more && status != NSS_STATUS_SUCCESS);
}
__libc_lock_unlock (lock); __libc_lock_unlock (lock);
__set_errno (save);
*result = status == NSS_STATUS_SUCCESS ? resbuf : NULL; return status;
return status == NSS_STATUS_SUCCESS ? 0 : errno;
} }

201
nss/getnssent_r.c Normal file
View File

@@ -0,0 +1,201 @@
/* Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <netdb.h>
#include "nsswitch.h"
/* Set up NIP to run through the services. If ALL is zero, use NIP's
current location if it's not nil. Return nonzero if there are no
services (left). */
static int
setup (const char *func_name, db_lookup_function lookup_fct,
void **fctp, service_user **nip, service_user **startp, int all)
{
int no_more;
if (*startp == NULL)
{
no_more = lookup_fct (nip, func_name, fctp);
*startp = no_more ? (service_user *) -1l : *nip;
}
else if (*startp == (service_user *) -1l)
/* No services at all. */
return 1;
else
{
if (all || !*nip)
/* Reset to the beginning of the service list. */
*nip = *startp;
/* Look up the first function. */
no_more = __nss_lookup (nip, func_name, fctp);
}
return no_more;
}
void
__nss_setent (const char *func_name, db_lookup_function lookup_fct,
service_user **nip, service_user **startp,
service_user **last_nip, int stayopen, int *stayopen_tmp,
int res)
{
setent_function fct;
int no_more;
if (res && (_res.options & RES_INIT) == 0
&& __res_ninit (&_res) == -1)
{
__set_h_errno (NETDB_INTERNAL);
return;
}
/* Cycle through the services and run their `setXXent' functions until
we find an available service. */
no_more = setup (func_name, lookup_fct, (void **) &fct, nip,
startp, 1);
while (! no_more)
{
int is_last_nip = *nip == *last_nip;
enum nss_status status;
if (stayopen_tmp)
status = DL_CALL_FCT (fct, (*stayopen_tmp));
else
status = DL_CALL_FCT (fct, (0));
no_more = __nss_next (nip, func_name, (void **) &fct,
status, 0);
if (is_last_nip)
*last_nip = *nip;
}
if (stayopen_tmp)
*stayopen_tmp = stayopen;
}
void
__nss_endent (const char *func_name, db_lookup_function lookup_fct,
service_user **nip, service_user **startp,
service_user **last_nip, int res)
{
endent_function fct;
int no_more;
if (res && (_res.options & RES_INIT) == 0
&& __res_ninit (&_res) == -1)
{
__set_h_errno (NETDB_INTERNAL);
return;
}
/* Cycle through all the services and run their endXXent functions. */
no_more = setup (func_name, lookup_fct, (void **) &fct, nip, startp, 1);
while (! no_more)
{
/* Ignore status, we force check in __NSS_NEXT. */
DL_CALL_FCT (fct, ());
if (*nip == *last_nip)
/* We have processed all services which were used. */
break;
no_more = __nss_next (nip, func_name, (void **) &fct, 0, 1);
}
*last_nip = *nip = NULL;
}
int
__nss_getent_r (const char *getent_func_name,
const char *setent_func_name,
db_lookup_function lookup_fct,
service_user **nip, service_user **startp,
service_user **last_nip, int *stayopen_tmp, int res,
void *resbuf, char *buffer, size_t buflen,
void **result, int *h_errnop)
{
getent_function fct;
int no_more;
enum nss_status status;
if (res && (_res.options & RES_INIT) == 0
&& __res_ninit (&_res) == -1)
{
__set_h_errno (NETDB_INTERNAL);
*result = NULL;
return errno;
}
/* Initialize status to return if no more functions are found. */
status = NSS_STATUS_NOTFOUND;
/* Run through available functions, starting with the same function last
run. We will repeat each function as long as it succeeds, and then go
on to the next service action. */
no_more = setup (getent_func_name, lookup_fct, (void **) &fct, nip,
startp, 0);
while (! no_more)
{
int is_last_nip = *nip == *last_nip;
status = DL_CALL_FCT (fct,
(resbuf, buffer, buflen, &errno, &h_errno));
/* The the status is NSS_STATUS_TRYAGAIN and errno is ERANGE the
provided buffer is too small. In this case we should give
the user the possibility to enlarge the buffer and we should
not simply go on with the next service (even if the TRYAGAIN
action tells us so). */
if (status == NSS_STATUS_TRYAGAIN
&& (h_errnop == NULL || *h_errnop == NETDB_INTERNAL)
&& errno == ERANGE)
break;
do
{
no_more = __nss_next (nip, getent_func_name, (void **) &fct,
status, 0);
if (is_last_nip)
*last_nip = *nip;
if (! no_more)
{
/* Call the `setXXent' function. This wasn't done before. */
setent_function sfct;
no_more = __nss_lookup (nip, setent_func_name,
(void **) &sfct);
if (! no_more)
{
if (stayopen_tmp)
status = DL_CALL_FCT (sfct, (*stayopen_tmp));
else
status = DL_CALL_FCT (sfct, (0));
}
else
status = NSS_STATUS_NOTFOUND;
}
}
while (! no_more && status != NSS_STATUS_SUCCESS);
}
*result = status == NSS_STATUS_SUCCESS ? resbuf : NULL;
return status == NSS_STATUS_SUCCESS ? 0 : errno;
}

31
nss/nsswitch.h
View File

@@ -130,4 +130,35 @@ int __nss_next (service_user **ni, const char *fct_name, void **fctp,
and return a pointer to this function if successful. */ and return a pointer to this function if successful. */
void *__nss_lookup_function (service_user *ni, const char *fct_name); void *__nss_lookup_function (service_user *ni, const char *fct_name);
typedef int (*db_lookup_function) (service_user **, const char *,
void **);
typedef enum nss_status (*setent_function) (int);
typedef enum nss_status (*endent_function) (void);
typedef enum nss_status (*getent_function) (void *, char *, size_t,
int *, int *);
typedef int (*getent_r_function) (void *, char *, size_t,
void **result, int *);
extern void __nss_setent (const char *func_name,
db_lookup_function lookup_fct,
service_user **nip, service_user **startp,
service_user **last_nip, int stayon,
int *stayon_tmp, int res);
extern void __nss_endent (const char *func_name,
db_lookup_function lookup_fct,
service_user **nip, service_user **startp,
service_user **last_nip, int res);
extern int __nss_getent_r (const char *getent_func_name,
const char *setent_func_name,
db_lookup_function lookup_fct,
service_user **nip, service_user **startp,
service_user **last_nip, int *stayon_tmp,
int res,
void *resbuf, char *buffer, size_t buflen,
void **result, int *h_errnop);
extern void *__nss_getent (getent_r_function func,
void **resbuf, char **buffer, size_t buflen,
size_t *buffer_size, int *h_errnop);
#endif /* nsswitch.h */ #endif /* nsswitch.h */