author | Jon Tibble <meths@btinternet.com> |
Thu, 09 Dec 2010 22:32:39 +0100 | |
changeset 13255 | 4afa820d78b9 |
parent 6812 | febeba71273d |
permissions | -rw-r--r-- |
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/* |
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* CDDL HEADER START |
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* |
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* The contents of this file are subject to the terms of the |
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* Common Development and Distribution License (the "License"). |
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* You may not use this file except in compliance with the License. |
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* |
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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* or http://www.opensolaris.org/os/licensing. |
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* See the License for the specific language governing permissions |
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* and limitations under the License. |
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* |
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* When distributing Covered Code, include this CDDL HEADER in each |
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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* If applicable, add the following below this CDDL HEADER, with the |
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* fields enclosed by brackets "[]" replaced with your own identifying |
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* information: Portions Copyright [yyyy] [name of copyright owner] |
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* |
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* CDDL HEADER END |
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*/ |
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/* |
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved. |
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* Use is subject to license terms. |
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*/ |
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/* Copyright (c) 1988 AT&T */ |
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/* All Rights Reserved */ |
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#pragma ident "%Z%%M% %I% %E% SMI" |
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#pragma weak _initgroups = initgroups |
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#include "lint.h" |
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#include <stdlib.h> |
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#include <errno.h> |
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#include <grp.h> |
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#include <sys/types.h> |
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#include <sys/param.h> |
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#include <unistd.h> |
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/* Private interface to the groups code in getgrnam.c */ |
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extern int _getgroupsbymember(const char *, gid_t[], int, int); |
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int |
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initgroups(const char *uname, gid_t agroup) |
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{ |
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gid_t *groups; |
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long ngroups_max; |
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int ngroups; |
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int errsave, retsave; |
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if ((ngroups_max = sysconf(_SC_NGROUPS_MAX)) < 0) { |
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/* ==== Hope sysconf() set errno to something sensible */ |
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return (-1); |
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} |
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/* |
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* ngroups_max is the maximum number of supplemental groups per |
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* process. if no supplemental groups are allowed, we're done. |
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*/ |
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if (ngroups_max == 0) |
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return (0); |
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if ((groups = (gid_t *)calloc(ngroups_max, sizeof (gid_t))) == 0) { |
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errno = ENOMEM; |
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return (-1); |
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} |
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groups[0] = agroup; |
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ngroups = _getgroupsbymember(uname, groups, (int)ngroups_max, |
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(agroup <= MAXUID) ? 1 : 0); |
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if (ngroups < 0) { |
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/* XXX -- man page does not define a value for errno in */ |
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/* this case. Should be looked into sometime. */ |
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free(groups); |
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return (-1); |
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} |
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retsave = setgroups(ngroups, groups); |
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errsave = errno; |
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free(groups); |
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errno = errsave; |
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return (retsave); |
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} |