glibc/nis/nss_nis/nis-grp.c

248 lines
6.0 KiB
C

/* Copyright (C) 1996-1999, 2001-2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <nss.h>
/* The following is an ugly trick to avoid a prototype declaration for
_nss_nis_endgrent. */
#define _nss_nis_endgrent _nss_nis_endgrent_XXX
#include <grp.h>
#undef _nss_nis_endgrent
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
/* Get the declaration of the parser function. */
#define ENTNAME grent
#define STRUCTURE group
#define EXTERN_PARSER
#include <nss/nss_files/files-parse.c>
/* Protect global state against multiple changers */
__libc_lock_define_initialized (static, lock)
static bool_t new_start = 1;
static char *oldkey;
static int oldkeylen;
enum nss_status
_nss_nis_setgrent (int stayopen)
{
__libc_lock_lock (lock);
new_start = 1;
if (oldkey != NULL)
{
free (oldkey);
oldkey = NULL;
oldkeylen = 0;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
/* Make _nss_nis_endgrent an alias of _nss_nis_setgrent. We do this
even though the prototypes don't match. The argument of setgrent
is not used so this makes no difference. */
strong_alias (_nss_nis_setgrent, _nss_nis_endgrent)
static enum nss_status
internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen,
int *errnop)
{
struct parser_data *data = (void *) buffer;
char *domain, *result, *outkey;
int len, keylen, parse_res;
if (yp_get_default_domain (&domain))
return NSS_STATUS_UNAVAIL;
/* Get the next entry until we found a correct one. */
do
{
enum nss_status retval;
char *p;
if (new_start)
retval = yperr2nss (yp_first (domain, "group.byname",
&outkey, &keylen, &result, &len));
else
retval = yperr2nss ( yp_next (domain, "group.byname",
oldkey, oldkeylen,
&outkey, &keylen, &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
*errnop = errno;
return retval;
}
if ((size_t) (len + 1) > buflen)
{
free (result);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p = strncpy (buffer, result, len);
buffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
parse_res = _nss_files_parse_grent (p, grp, data, buflen, errnop);
if (parse_res == -1)
{
free (outkey);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
free (oldkey);
oldkey = outkey;
oldkeylen = keylen;
new_start = 0;
}
while (parse_res < 1);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen,
int *errnop)
{
int status;
__libc_lock_lock (lock);
status = internal_nis_getgrent_r (result, buffer, buflen, errnop);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nis_getgrnam_r (const char *name, struct group *grp,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
enum nss_status retval;
char *domain, *result, *p;
int len, parse_res;
if (name == NULL)
{
*errnop = EINVAL;
return NSS_STATUS_UNAVAIL;
}
if (yp_get_default_domain (&domain))
return NSS_STATUS_UNAVAIL;
retval = yperr2nss (yp_match (domain, "group.byname", name,
strlen (name), &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
*errnop = errno;
return retval;
}
if ((size_t) (len + 1) > buflen)
{
free (result);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p = strncpy (buffer, result, len);
buffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
parse_res = _nss_files_parse_grent (p, grp, data, buflen, errnop);
if (parse_res < 1)
{
if (parse_res == -1)
return NSS_STATUS_TRYAGAIN;
else
return NSS_STATUS_NOTFOUND;
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_getgrgid_r (gid_t gid, struct group *grp,
char *buffer, size_t buflen, int *errnop)
{
struct parser_data *data = (void *) buffer;
enum nss_status retval;
char *domain, *result, *p;
int len, nlen, parse_res;
char buf[32];
if (yp_get_default_domain (&domain))
return NSS_STATUS_UNAVAIL;
nlen = sprintf (buf, "%lu", (unsigned long int) gid);
retval = yperr2nss (yp_match (domain, "group.bygid", buf,
nlen, &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
*errnop = errno;
return retval;
}
if ((size_t) (len + 1) > buflen)
{
free (result);
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
p = strncpy (buffer, result, len);
buffer[len] = '\0';
while (isspace (*p))
++p;
free (result);
parse_res = _nss_files_parse_grent (p, grp, data, buflen, errnop);
if (parse_res < 1)
{
if (parse_res == -1)
return NSS_STATUS_TRYAGAIN;
else
return NSS_STATUS_NOTFOUND;
}
return NSS_STATUS_SUCCESS;
}