c675522fc4
provides the correct semantics for flock(2) style locks which are used by the lockf(1) command line tool and the pidfile(3) library. It also implements recovery from server restarts and ensures that dirty cache blocks are written to the server before obtaining locks (allowing multiple clients to use file locking to safely share data). Sponsored by: Isilon Systems PR: 94256 MFC after: 2 weeks
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/* $NetBSD: authunix_prot.c,v 1.12 2000/01/22 22:19:17 mycroft Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "@(#)authunix_prot.c 1.15 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)authunix_prot.c 2.1 88/07/29 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* authunix_prot.c
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* XDR for UNIX style authentication parameters for RPC
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/ucred.h>
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#include <rpc/types.h>
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#include <rpc/xdr.h>
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#include <rpc/auth.h>
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#include <rpc/rpc_com.h>
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/* gids compose part of a credential; there may not be more than 16 of them */
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#define NGRPS 16
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/*
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* XDR for unix authentication parameters.
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*/
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bool_t
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xdr_authunix_parms(XDR *xdrs, uint32_t *time, struct xucred *cred)
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{
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uint32_t namelen;
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uint32_t ngroups, i;
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uint32_t junk;
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if (xdrs->x_op == XDR_ENCODE) {
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/*
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* Restrict name length to 255 according to RFC 1057.
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*/
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namelen = strlen(hostname);
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if (namelen > 255)
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namelen = 255;
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} else {
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namelen = 0;
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}
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junk = 0;
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if (!xdr_uint32_t(xdrs, time)
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|| !xdr_uint32_t(xdrs, &namelen))
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return (FALSE);
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/*
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* Ignore the hostname on decode.
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*/
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if (xdrs->x_op == XDR_ENCODE) {
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if (!xdr_opaque(xdrs, hostname, namelen))
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return (FALSE);
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} else {
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xdr_setpos(xdrs, xdr_getpos(xdrs) + RNDUP(namelen));
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}
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if (!xdr_uint32_t(xdrs, &cred->cr_uid))
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return (FALSE);
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if (!xdr_uint32_t(xdrs, &cred->cr_groups[0]))
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return (FALSE);
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if (xdrs->x_op == XDR_ENCODE) {
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ngroups = cred->cr_ngroups - 1;
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if (ngroups > NGRPS)
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ngroups = NGRPS;
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}
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if (!xdr_uint32_t(xdrs, &ngroups))
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return (FALSE);
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for (i = 0; i < ngroups; i++) {
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if (i + 1 < NGROUPS) {
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if (!xdr_uint32_t(xdrs, &cred->cr_groups[i + 1]))
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return (FALSE);
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} else {
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if (!xdr_uint32_t(xdrs, &junk))
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return (FALSE);
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}
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}
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if (xdrs->x_op == XDR_DECODE) {
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if (ngroups + 1 > NGROUPS)
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cred->cr_ngroups = NGROUPS;
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else
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cred->cr_ngroups = ngroups + 1;
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}
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return (TRUE);
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}
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