278 lines
6.4 KiB
C
278 lines
6.4 KiB
C
/* Copyright (C) 1996-1998,2000,2002,2003,2004,2006
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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@suse.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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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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 <bits/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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/* Get the declaration of the parser function. */
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#define ENTNAME rpcent
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#define EXTERN_PARSER
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#include <nss/nss_files/files-parse.c>
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__libc_lock_define_initialized (static, lock)
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static intern_t intern;
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static void
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internal_nis_endrpcent (intern_t *intern)
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{
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struct response_t *curr = intern->next;
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while (curr != NULL)
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{
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struct response_t *last = curr;
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curr = curr->next;
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free (last);
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}
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intern->next = intern->start = NULL;
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}
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static enum nss_status
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internal_nis_setrpcent (intern_t *intern)
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{
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char *domainname;
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struct ypall_callback ypcb;
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enum nss_status status;
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if (yp_get_default_domain (&domainname))
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return NSS_STATUS_UNAVAIL;
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internal_nis_endrpcent (intern);
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ypcb.foreach = _nis_saveit;
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ypcb.data = (char *) intern;
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status = yperr2nss (yp_all (domainname, "rpc.bynumber", &ypcb));
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/* Mark the last buffer as full. */
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if (intern->next != NULL)
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intern->next->size = intern->offset;
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intern->next = intern->start;
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intern->offset = 0;
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return status;
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}
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enum nss_status
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_nss_nis_setrpcent (int stayopen)
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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_setrpcent (&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_endrpcent (void)
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{
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__libc_lock_lock (lock);
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internal_nis_endrpcent (&intern);
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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static enum nss_status
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internal_nis_getrpcent_r (struct rpcent *rpc, char *buffer, size_t buflen,
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int *errnop, intern_t *intern)
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{
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struct parser_data *pdata = (void *) buffer;
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int parse_res;
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char *p;
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if (intern->start == NULL)
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internal_nis_setrpcent (intern);
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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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struct response_t *bucket = intern->next;
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if (__builtin_expect (intern->offset >= bucket->size, 0))
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{
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if (bucket->next == NULL)
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return NSS_STATUS_NOTFOUND;
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/* We look at all the content in the current bucket. Go on
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to the next. */
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bucket = intern->next = bucket->next;
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intern->offset = 0;
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}
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for (p = &bucket->mem[intern->offset]; isspace (*p); ++p)
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++intern->offset;
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size_t len = strlen (p) + 1;
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if (__builtin_expect (len > buflen, 0))
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{
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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/* We unfortunately have to copy the data in the user-provided
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buffer because that buffer might be around for a very long
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time and the servent structure must remain valid. If we would
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rely on the BUCKET memory the next 'setservent' or 'endservent'
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call would destroy it.
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The important thing is that it is a single NUL-terminated
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string. This is what the parsing routine expects. */
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p = memcpy (buffer, &bucket->mem[intern->offset], len);
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parse_res = _nss_files_parse_rpcent (p, rpc, pdata, buflen, errnop);
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if (__builtin_expect (parse_res == -1, 0))
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return NSS_STATUS_TRYAGAIN;
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intern->offset += len;
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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_getrpcent_r (struct rpcent *rpc, char *buffer, size_t buflen,
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int *errnop)
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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_getrpcent_r (rpc, buffer, buflen, errnop, &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_getrpcbyname_r (const char *name, struct rpcent *rpc,
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char *buffer, size_t buflen, int *errnop)
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{
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if (name == NULL)
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{
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*errnop = EINVAL;
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return NSS_STATUS_UNAVAIL;
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}
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intern_t data = { NULL, NULL, 0 };
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enum nss_status status = internal_nis_setrpcent (&data);
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if (__builtin_expect (status != NSS_STATUS_SUCCESS, 0))
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return status;
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int found = 0;
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while (!found &&
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((status = internal_nis_getrpcent_r (rpc, buffer, buflen, errnop,
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&data)) == NSS_STATUS_SUCCESS))
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{
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if (strcmp (rpc->r_name, name) == 0)
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found = 1;
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else
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{
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int i = 0;
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while (rpc->r_aliases[i] != NULL)
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{
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if (strcmp (rpc->r_aliases[i], name) == 0)
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{
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found = 1;
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break;
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}
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else
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++i;
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}
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}
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}
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internal_nis_endrpcent (&data);
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if (__builtin_expect (!found && status == NSS_STATUS_SUCCESS, 0))
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return NSS_STATUS_NOTFOUND;
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return status;
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}
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enum nss_status
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_nss_nis_getrpcbynumber_r (int number, struct rpcent *rpc,
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char *buffer, size_t buflen, int *errnop)
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{
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char *domain;
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if (__builtin_expect (yp_get_default_domain (&domain), 0))
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return NSS_STATUS_UNAVAIL;
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char buf[32];
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int nlen = snprintf (buf, sizeof (buf), "%d", number);
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char *result;
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int len;
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int yperr = yp_match (domain, "rpc.bynumber", buf, nlen, &result, &len);
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if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
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{
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enum nss_status retval = yperr2nss (yperr);
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if (retval == NSS_STATUS_TRYAGAIN)
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*errnop = errno;
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return retval;
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}
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if (__builtin_expect ((size_t) (len + 1) > buflen, 0))
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{
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free (result);
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*errnop = ERANGE;
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return NSS_STATUS_TRYAGAIN;
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}
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char *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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int parse_res = _nss_files_parse_rpcent (p, rpc, (void *) buffer, buflen,
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errnop);
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if (__builtin_expect (parse_res < 1, 0))
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{
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if (parse_res == -1)
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return NSS_STATUS_TRYAGAIN;
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else
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return NSS_STATUS_NOTFOUND;
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}
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else
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return NSS_STATUS_SUCCESS;
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}
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