354 lines
9.2 KiB
C
354 lines
9.2 KiB
C
/*
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* Copyright (c) 1989, 1993, 1995
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* The Regents of the University of California. 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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its 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 THE REGENTS 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 THE REGENTS 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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/*
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* Portions Copyright (c) 1996-1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static const char rcsid[] = "$Id: nis_gr.c,v 1.21 2001/05/29 05:49:12 marka Exp $";
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/* from getgrent.c 8.2 (Berkeley) 3/21/94"; */
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/* from BSDI Id: getgrent.c,v 2.8 1996/05/28 18:15:14 bostic Exp $ */
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#endif /* LIBC_SCCS and not lint */
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/* Imports */
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#include "port_before.h"
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#if !defined(WANT_IRS_GR) || !defined(WANT_IRS_NIS)
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static int __bind_irs_gr_unneeded;
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#else
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#include <sys/param.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include <isc/memcluster.h>
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#include <rpc/rpc.h>
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#include <rpc/xdr.h>
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#include <errno.h>
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#include <grp.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 <unistd.h>
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#include <isc/memcluster.h>
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#include <irs.h>
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#include "port_after.h"
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#include "irs_p.h"
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#include "nis_p.h"
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/* Definitions */
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struct pvt {
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int needrewind;
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char * nis_domain;
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char * curkey_data;
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int curkey_len;
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char * curval_data;
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int curval_len;
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/*
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* Need space to store the entries read from the group file.
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* The members list also needs space per member, and the
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* strings making up the user names must be allocated
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* somewhere. Rather than doing lots of small allocations,
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* we keep one buffer and resize it as needed.
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*/
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struct group group;
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size_t nmemb; /* Malloc'd max index of gr_mem[]. */
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char * membuf;
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size_t membufsize;
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};
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enum do_what { do_none = 0x0, do_key = 0x1, do_val = 0x2, do_all = 0x3 };
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static /*const*/ char group_bygid[] = "group.bygid";
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static /*const*/ char group_byname[] = "group.byname";
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/* Forward */
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static void gr_close(struct irs_gr *);
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static struct group * gr_next(struct irs_gr *);
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static struct group * gr_byname(struct irs_gr *, const char *);
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static struct group * gr_bygid(struct irs_gr *, gid_t);
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static void gr_rewind(struct irs_gr *);
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static void gr_minimize(struct irs_gr *);
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static struct group * makegroupent(struct irs_gr *);
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static void nisfree(struct pvt *, enum do_what);
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/* Public */
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struct irs_gr *
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irs_nis_gr(struct irs_acc *this) {
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struct irs_gr *gr;
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struct pvt *pvt;
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if (!(gr = memget(sizeof *gr))) {
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errno = ENOMEM;
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return (NULL);
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}
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memset(gr, 0x5e, sizeof *gr);
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if (!(pvt = memget(sizeof *pvt))) {
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memput(gr, sizeof *gr);
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errno = ENOMEM;
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return (NULL);
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}
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memset(pvt, 0, sizeof *pvt);
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pvt->needrewind = 1;
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pvt->nis_domain = ((struct nis_p *)this->private)->domain;
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gr->private = pvt;
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gr->close = gr_close;
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gr->next = gr_next;
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gr->byname = gr_byname;
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gr->bygid = gr_bygid;
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gr->rewind = gr_rewind;
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gr->list = make_group_list;
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gr->minimize = gr_minimize;
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gr->res_get = NULL;
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gr->res_set = NULL;
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return (gr);
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}
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/* Methods */
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static void
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gr_close(struct irs_gr *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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if (pvt->group.gr_mem)
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free(pvt->group.gr_mem);
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if (pvt->membuf)
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free(pvt->membuf);
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memput(pvt, sizeof *pvt);
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memput(this, sizeof *this);
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}
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static struct group *
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gr_next(struct irs_gr *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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struct group *rval;
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int r;
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do {
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if (pvt->needrewind) {
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nisfree(pvt, do_all);
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r = yp_first(pvt->nis_domain, group_byname,
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&pvt->curkey_data, &pvt->curkey_len,
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&pvt->curval_data, &pvt->curval_len);
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pvt->needrewind = 0;
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} else {
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char *newkey_data;
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int newkey_len;
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nisfree(pvt, do_val);
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r = yp_next(pvt->nis_domain, group_byname,
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pvt->curkey_data, pvt->curkey_len,
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&newkey_data, &newkey_len,
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&pvt->curval_data, &pvt->curval_len);
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nisfree(pvt, do_key);
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pvt->curkey_data = newkey_data;
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pvt->curkey_len = newkey_len;
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}
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if (r != 0) {
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errno = ENOENT;
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return (NULL);
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}
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rval = makegroupent(this);
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} while (rval == NULL);
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return (rval);
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}
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static struct group *
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gr_byname(struct irs_gr *this, const char *name) {
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struct pvt *pvt = (struct pvt *)this->private;
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int r;
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nisfree(pvt, do_val);
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r = yp_match(pvt->nis_domain, group_byname, name, strlen(name),
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&pvt->curval_data, &pvt->curval_len);
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if (r != 0) {
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errno = ENOENT;
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return (NULL);
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}
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return (makegroupent(this));
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}
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static struct group *
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gr_bygid(struct irs_gr *this, gid_t gid) {
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struct pvt *pvt = (struct pvt *)this->private;
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char tmp[sizeof "4294967295"];
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int r;
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nisfree(pvt, do_val);
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(void) sprintf(tmp, "%u", (unsigned int)gid);
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r = yp_match(pvt->nis_domain, group_bygid, tmp, strlen(tmp),
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&pvt->curval_data, &pvt->curval_len);
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if (r != 0) {
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errno = ENOENT;
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return (NULL);
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}
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return (makegroupent(this));
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}
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static void
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gr_rewind(struct irs_gr *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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pvt->needrewind = 1;
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}
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static void
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gr_minimize(struct irs_gr *this) {
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UNUSED(this);
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/* NOOP */
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}
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/* Private */
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static struct group *
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makegroupent(struct irs_gr *this) {
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struct pvt *pvt = (struct pvt *)this->private;
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unsigned int num_members = 0;
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char *cp, **new;
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u_long t;
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if (pvt->group.gr_mem) {
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free(pvt->group.gr_mem);
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pvt->group.gr_mem = NULL;
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pvt->nmemb = 0;
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}
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if (pvt->membuf)
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free(pvt->membuf);
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pvt->membuf = pvt->curval_data;
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pvt->curval_data = NULL;
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cp = pvt->membuf;
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pvt->group.gr_name = cp;
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if (!(cp = strchr(cp, ':')))
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goto cleanup;
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*cp++ = '\0';
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pvt->group.gr_passwd = cp;
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if (!(cp = strchr(cp, ':')))
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goto cleanup;
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*cp++ = '\0';
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errno = -1;
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t = strtoul(cp, NULL, 10);
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if (errno == ERANGE)
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goto cleanup;
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pvt->group.gr_gid = (gid_t) t;
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if (!(cp = strchr(cp, ':')))
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goto cleanup;
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cp++;
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if (*cp && cp[strlen(cp)-1] == '\n')
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cp[strlen(cp)-1] = '\0';
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/*
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* Parse the members out.
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*/
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while (*cp) {
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if (num_members+1 >= pvt->nmemb || pvt->group.gr_mem == NULL) {
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pvt->nmemb += 10;
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new = realloc(pvt->group.gr_mem,
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pvt->nmemb * sizeof(char *));
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if (new == NULL)
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goto cleanup;
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pvt->group.gr_mem = new;
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}
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pvt->group.gr_mem[num_members++] = cp;
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if (!(cp = strchr(cp, ',')))
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break;
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*cp++ = '\0';
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}
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if (pvt->group.gr_mem == NULL) {
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pvt->group.gr_mem = malloc(sizeof(char*));
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if (!pvt->group.gr_mem)
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goto cleanup;
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pvt->nmemb = 1;
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}
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pvt->group.gr_mem[num_members] = NULL;
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return (&pvt->group);
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cleanup:
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if (pvt->group.gr_mem) {
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free(pvt->group.gr_mem);
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pvt->group.gr_mem = NULL;
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pvt->nmemb = 0;
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}
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if (pvt->membuf) {
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free(pvt->membuf);
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pvt->membuf = NULL;
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}
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return (NULL);
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}
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static void
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nisfree(struct pvt *pvt, enum do_what do_what) {
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if ((do_what & do_key) && pvt->curkey_data) {
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free(pvt->curkey_data);
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pvt->curkey_data = NULL;
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}
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if ((do_what & do_val) && pvt->curval_data) {
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free(pvt->curval_data);
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pvt->curval_data = NULL;
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}
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}
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#endif /* WANT_IRS_GR && WANT_IRS_NIS */
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