f53c1c309d
NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024
and 1023 respectively. (Previously they were equal, but under a close
reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it
is the number of supplemental groups, not total number of groups.)
The bulk of the change consists of converting the struct ucred member
cr_groups from a static array to a pointer. Do the equivalent in
kinfo_proc.
Introduce new interfaces crcopysafe() and crsetgroups() for duplicating
a process credential before modifying it and for setting group lists
respectively. Both interfaces take care for the details of allocating
groups array. crsetgroups() takes care of truncating the group list
to the current maximum (NGROUPS) if necessary. In the future,
crsetgroups() may be responsible for insuring invariants such as sorting
the supplemental groups to allow groupmember() to be implemented as a
binary search.
Because we can not change struct xucred without breaking application
ABIs, we leave it alone and introduce a new XU_NGROUPS value which is
always 16 and is to be used or NGRPS as appropriate for things such as
NFS which need to use no more than 16 groups. When feasible, truncate
the group list rather than generating an error.
Minor changes:
- Reduce the number of hand rolled versions of groupmember().
- Do not assign to both cr_gid and cr_groups[0].
- Modify ipfw to cache ucreds instead of part of their contents since
they are immutable once referenced by more than one entity.
Submitted by: Isilon Systems (initial implementation)
X-MFC after: never
PR: bin/113398 kern/133867
151 lines
3.8 KiB
C
151 lines
3.8 KiB
C
/*
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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 or with the express written consent of
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* Sun Microsystems, Inc.
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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 sccsid[] = "@(#)netname.c 1.8 91/03/11 Copyr 1986 Sun Micro";
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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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* netname utility routines
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* convert from unix names to network names and vice-versa
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* This module is operating system dependent!
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* What we define here will work with any unix system that has adopted
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* the sun NIS domain architecture.
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*/
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#include "namespace.h"
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#include <sys/param.h>
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#include <rpc/rpc.h>
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#include <rpc/rpc_com.h>
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#ifdef YP
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#include <rpcsvc/yp_prot.h>
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#include <rpcsvc/ypclnt.h>
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#endif
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#include <ctype.h>
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#include <limits.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 "un-namespace.h"
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 256
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#endif
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#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
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#define TYPE_SIGNED(type) (((type) -1) < 0)
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/*
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** 302 / 1000 is log10(2.0) rounded up.
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** Subtract one for the sign bit if the type is signed;
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** add one for integer division truncation;
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** add one more for a minus sign if the type is signed.
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*/
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#define INT_STRLEN_MAXIMUM(type) \
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((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 1000 + 1 + TYPE_SIGNED(type))
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static char *OPSYS = "unix";
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/*
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* Figure out my fully qualified network name
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*/
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int
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getnetname(name)
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char name[MAXNETNAMELEN+1];
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{
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uid_t uid;
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uid = geteuid();
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if (uid == 0) {
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return (host2netname(name, (char *) NULL, (char *) NULL));
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} else {
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return (user2netname(name, uid, (char *) NULL));
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}
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}
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/*
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* Convert unix cred to network-name
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*/
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int
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user2netname(netname, uid, domain)
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char netname[MAXNETNAMELEN + 1];
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const uid_t uid;
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const char *domain;
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{
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char *dfltdom;
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if (domain == NULL) {
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if (__rpc_get_default_domain(&dfltdom) != 0) {
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return (0);
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}
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domain = dfltdom;
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}
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if (strlen(domain) + 1 + INT_STRLEN_MAXIMUM(u_long) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
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return (0);
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}
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(void) sprintf(netname, "%s.%ld@%s", OPSYS, (u_long)uid, domain);
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return (1);
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}
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/*
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* Convert host to network-name
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*/
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int
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host2netname(netname, host, domain)
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char netname[MAXNETNAMELEN + 1];
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const char *host;
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const char *domain;
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{
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char *dfltdom;
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char hostname[MAXHOSTNAMELEN+1];
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if (domain == NULL) {
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if (__rpc_get_default_domain(&dfltdom) != 0) {
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return (0);
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}
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domain = dfltdom;
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}
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if (host == NULL) {
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(void) gethostname(hostname, sizeof(hostname));
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host = hostname;
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}
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if (strlen(domain) + 1 + strlen(host) + 1 + strlen(OPSYS) > MAXNETNAMELEN) {
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return (0);
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}
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(void) sprintf(netname, "%s.%s@%s", OPSYS, host, domain);
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return (1);
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}
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