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250 lines
5.7 KiB
C
250 lines
5.7 KiB
C
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/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <nss.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include <libc-lock.h>
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#include <rpcsvc/yp.h>
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#include <rpcsvc/ypclnt.h>
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#include "nss-nis.h"
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__libc_lock_define_initialized (static, lock)
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struct intern_t
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{
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bool_t new_start;
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char *oldkey;
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int oldkeylen;
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};
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typedef struct intern_t intern_t;
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static intern_t intern = {TRUE, NULL, 0};
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static enum nss_status
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internal_nis_setservent (intern_t * intern)
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{
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intern->new_start = 1;
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if (intern->oldkey != NULL)
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{
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free (intern->oldkey);
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intern->oldkey = NULL;
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intern->oldkeylen = 0;
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}
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nis_setservent (void)
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{
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enum nss_status status;
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__libc_lock_lock (lock);
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status = internal_nis_setservent (&intern);
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__libc_lock_unlock (lock);
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return status;
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}
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static enum nss_status
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internal_nis_endservent (intern_t * intern)
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{
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intern->new_start = 1;
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if (intern->oldkey != NULL)
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{
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free (intern->oldkey);
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intern->oldkey = NULL;
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intern->oldkeylen = 0;
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}
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nis_endservent (void)
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{
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enum nss_status status;
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__libc_lock_lock (lock);
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status = internal_nis_endservent (&intern);
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__libc_lock_unlock (lock);
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return status;
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}
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static enum nss_status
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internal_nis_getservent_r (struct servent *serv, char *buffer,
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size_t buflen, intern_t *data)
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{
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char *domain;
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char *result;
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int len, parse_res;
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char *outkey;
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int keylen;
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char *p;
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if (yp_get_default_domain (&domain))
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return NSS_STATUS_UNAVAIL;
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/* Get the next entry until we found a correct one. */
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do
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{
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enum nss_status retval;
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if (data->new_start)
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retval = yperr2nss (yp_first (domain, "services.byname",
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&outkey, &keylen, &result, &len));
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else
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retval = yperr2nss ( yp_next (domain, "services.byname",
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data->oldkey, data->oldkeylen,
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&outkey, &keylen, &result, &len));
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if (retval != NSS_STATUS_SUCCESS)
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{
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if (retval == NSS_STATUS_TRYAGAIN)
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__set_errno (EAGAIN);
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return retval;
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}
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if (len + 1 > buflen)
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{
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free (result);
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__set_errno (ERANGE);
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return NSS_STATUS_TRYAGAIN;
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}
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p = strncpy (buffer, result, len);
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buffer[len] = '\0';
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while (isspace (*p))
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++p;
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free (result);
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parse_res = _nss_files_parse_servent (p, serv, buffer, buflen);
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if (!parse_res && errno == ERANGE)
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return NSS_STATUS_TRYAGAIN;
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free (data->oldkey);
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data->oldkey = outkey;
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data->oldkeylen = keylen;
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data->new_start = 0;
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}
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while (!parse_res);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nis_getservent_r (struct servent *serv, char *buffer, size_t buflen)
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{
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enum nss_status status;
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__libc_lock_lock (lock);
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status = internal_nis_getservent_r (serv, buffer, buflen, &intern);
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__libc_lock_unlock (lock);
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return status;
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}
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enum nss_status
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_nss_nis_getservbyname_r (const char *name, char *protocol,
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struct servent *serv, char *buffer, size_t buflen)
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{
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intern_t data = {TRUE, NULL, 0};
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enum nss_status status;
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int found;
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if (name == NULL || protocol == NULL)
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{
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__set_errno (EINVAL);
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return NSS_STATUS_UNAVAIL;
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}
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status = internal_nis_setservent (&data);
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if (status != NSS_STATUS_SUCCESS)
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return status;
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found = 0;
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while (!found &&
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((status = internal_nis_getservent_r (serv, buffer, buflen, &data))
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== NSS_STATUS_SUCCESS))
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{
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if (strcmp (serv->s_name, name) == 0)
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{
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if (strcmp (serv->s_proto, protocol) == 0)
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{
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found = 1;
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}
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}
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}
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internal_nis_endservent (&data);
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if (!found && status == NSS_STATUS_SUCCESS)
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return NSS_STATUS_NOTFOUND;
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else
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return status;
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}
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enum nss_status
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_nss_nis_getservbyport_r (int port, char *protocol, struct servent *serv,
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char *buffer, size_t buflen)
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{
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intern_t data = {TRUE, NULL, 0};
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enum nss_status status;
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int found;
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if (protocol == NULL)
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{
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__set_errno (EINVAL);
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return NSS_STATUS_UNAVAIL;
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}
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status = internal_nis_setservent (&data);
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if (status != NSS_STATUS_SUCCESS)
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return status;
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found = 0;
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while (!found &&
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((status = internal_nis_getservent_r (serv, buffer, buflen, &data))
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== NSS_STATUS_SUCCESS))
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{
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if (htons (serv->s_port) == port)
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{
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if (strcmp (serv->s_proto, protocol) == 0)
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{
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found = 1;
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}
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}
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}
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internal_nis_endservent (&data);
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if (!found && status == NSS_STATUS_SUCCESS)
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return NSS_STATUS_NOTFOUND;
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else
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return status;
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}
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