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/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
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 <nss.h>
#include <grp.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <libc-lock.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>
#include "nss-nis.h"
/* Protect global state against multiple changers */
__libc_lock_define_initialized (static, lock)
static bool_t new_start = 1;
static char *oldkey = NULL;
static int oldkeylen = 0;
enum nss_status
_nss_nis_setgrent (void)
{
__libc_lock_lock (lock);
new_start = 1;
if (oldkey != NULL)
{
free (oldkey);
oldkey = NULL;
oldkeylen = 0;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_endgrent (void)
{
__libc_lock_lock (lock);
new_start = 1;
if (oldkey != NULL)
{
free (oldkey);
oldkey = NULL;
oldkeylen = 0;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
static enum nss_status
internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen)
{
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)
__set_errno (EAGAIN);
return retval;
}
if ((size_t) (len + 1) > buflen)
{
free (result);
__set_errno (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, buffer, buflen);
if (!parse_res && errno == ERANGE)
return NSS_STATUS_TRYAGAIN;
free (oldkey);
oldkey = outkey;
oldkeylen = keylen;
new_start = 0;
}
while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen)
{
int status;
__libc_lock_lock (lock);
status = internal_nis_getgrent_r (result, buffer, buflen);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nis_getgrnam_r (const char *name, struct group *grp,
char *buffer, size_t buflen)
{
enum nss_status retval;
char *domain, *result, *p;
int len, parse_res;
if (name == NULL)
{
__set_errno (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)
__set_errno (EAGAIN);
return retval;
}
if ((size_t) (len + 1) > buflen)
{
free (result);
__set_errno (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, buffer, buflen);
if (!parse_res)
{
if (errno == ERANGE)
return NSS_STATUS_TRYAGAIN;
else
return NSS_STATUS_NOTFOUND;
}
else
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nis_getgrgid_r (gid_t gid, struct group *grp,
char *buffer, size_t buflen)
{
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, "%d", gid);
retval = yperr2nss (yp_match (domain, "group.bygid", buf,
nlen, &result, &len));
if (retval != NSS_STATUS_SUCCESS)
{
if (retval == NSS_STATUS_TRYAGAIN)
__set_errno (EAGAIN);
return retval;
}
if ((size_t) (len + 1) > buflen)
{
free (result);
__set_errno (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, buffer, buflen);
if (!parse_res)
{
if (errno == ERANGE)
return NSS_STATUS_TRYAGAIN;
else
return NSS_STATUS_NOTFOUND;
}
else
return NSS_STATUS_SUCCESS;
}
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