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6b462d2762
Since YP protocol definition uses the constant to declare variable-size opaque byte strings, the change should be binary compatible with existing installations which do not expose keys or values larger than 1024 bytes. All uses of local variables with YPMAXRECORD sizes were removed to avoid insane stack use. On the other hand, variables with static lifetime should be fine and only result in increased VA use. Glibc made same change, increasing the allowed length for keys and values in YP to 16M, in 2013. Reviewed by: markj Discussed with: ian Sponsored by: Mellanox Technologies MFC after: 3 weeks Differential revision: https://reviews.freebsd.org/D20900
150 lines
4.1 KiB
C
150 lines
4.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1996
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* Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Bill Paul.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/fcntl.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#include <db.h>
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#include <unistd.h>
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#include <rpcsvc/ypclnt.h>
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#include <rpcsvc/ypupdate_prot.h>
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#include "ypxfr_extern.h"
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#include "ypupdated_extern.h"
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static int
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yp_domake(char *map, char *domain)
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{
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int pid;
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switch ((pid = fork())) {
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case 0:
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execlp(MAP_UPDATE_PATH, MAP_UPDATE, map, domain, (char *)NULL);
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yp_error("couldn't exec map update process: %s",
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strerror(errno));
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exit(1);
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break;
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case -1:
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yp_error("fork() failed: %s", strerror(errno));
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return(YPERR_YPERR);
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break;
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default:
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children++;
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break;
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}
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return(0);
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}
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int
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ypmap_update(char *netname, char *map, unsigned int op, unsigned int keylen,
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char *keyval, unsigned int datlen, char *datval)
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{
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DB *dbp;
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DBT key = { NULL, 0 }, data = { NULL, 0 };
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char *yp_last = "YP_LAST_MODIFIED";
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char yplastbuf[32];
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char *domptr;
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int rval = 0;
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if ((domptr = strchr(netname, '@')) == NULL)
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return(ERR_ACCESS);
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domptr++;
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dbp = yp_open_db_rw(domptr, map, O_RDWR);
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if (dbp == NULL)
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return(ERR_DBASE);
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key.data = keyval;
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key.size = keylen;
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data.data = datval;
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data.size = datlen;
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switch (op) {
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case YPOP_DELETE: /* delete this entry */
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rval = yp_del_record(dbp, &key);
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if (rval == YP_TRUE)
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rval = 0;
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break;
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case YPOP_INSERT: /* add, do not change */
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rval = yp_put_record(dbp, &key, &data, 0);
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if (rval == YP_TRUE)
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rval = 0;
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break;
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case YPOP_STORE: /* add, or change */
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rval = yp_put_record(dbp, &key, &data, 1);
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if (rval == YP_TRUE)
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rval = 0;
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break;
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case YPOP_CHANGE: /* change, do not add */
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if (yp_get_record(domptr, map, &key, &data, 0) != YP_TRUE) {
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rval = ERR_KEY;
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break;
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}
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rval = yp_put_record(dbp, &key, &data, 1);
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if (rval == YP_TRUE)
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rval = 0;
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break;
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default:
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yp_error("unknown update command: (%d)", op);
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}
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if (rval) {
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(void)(dbp->close)(dbp);
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return(rval);
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}
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snprintf(yplastbuf, sizeof(yplastbuf), "%jd", (intmax_t)time(NULL));
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key.data = yp_last;
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key.size = strlen(yp_last);
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data.data = (char *)&yplastbuf;
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data.size = strlen(yplastbuf);
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if (yp_put_record(dbp, &key, &data, 1) != YP_TRUE) {
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yp_error("failed to update timestamp in %s/%s", domptr, map);
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(void)(dbp->close)(dbp);
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return(ERR_DBASE);
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}
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(void)(dbp->close)(dbp);
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return(yp_domake(map, domptr));
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}
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