130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
/* initgroups.c: Replacement for the initgroups() function.
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%%% portions-copyright-cmetz
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Portions of this software are Copyright 1996 by Craig Metz, All Rights
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Reserved. The Inner Net License Version 2 applies to these portions of
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the software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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History:
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Modified by cmetz for OPIE 2.2. Removed useless string.
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Ifdef around headers. Use FUNCTION declarations.
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Not everyone has multiple groups. Work around
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lack of NGROUPS.
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Originally from 4.3BSD Net/2.
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*/
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/*
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* Copyright (c) 1983 Regents of the University of California.
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* 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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* initgroups
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*/
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#include "opie_cfg.h"
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#if HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif /* HAVE_SYS_PARAM_H */
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#include <stdio.h>
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#if HAVE_STRING_H
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#include <string.h>
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#endif /* HAVE_STRING */
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <grp.h>
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#include "opie.h"
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struct group *getgrent();
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int initgroups FUNCTION((uname, agroup), const char *uname AND int agroup)
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{
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#if HAVE_SETGROUPS && HAVE_GETGROUPS
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#if NGROUPS
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int groups[NGROUPS];
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#else /* NGROUPS */
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#define STARTING_NGROUPS 32
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int groups[STARTING_NGROUPS];
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#endif /* NGROUPS */
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int ngroups;
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register struct group *grp;
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register int i;
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/*
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* If installing primary group, duplicate it;
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* the first element of groups is the effective gid
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* and will be overwritten when a setgid file is executed.
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*/
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if (agroup >= 0) {
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groups[ngroups++] = agroup;
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groups[ngroups++] = agroup;
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}
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setgrent();
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while (grp = getgrent()) {
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if (grp->gr_gid == agroup)
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continue;
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for (i = 0; grp->gr_mem[i]; i++)
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if (!strcmp(grp->gr_mem[i], uname)) {
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#if NGROUPS
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if (ngroups == NGROUPS) {
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#else /* NGROUPS */
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if (ngroups == STARTING_NGROUPS) {
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#endif /* NGROUPS */
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fprintf(stderr, "initgroups: %s is in too many groups\n", uname);
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goto toomany;
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}
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groups[ngroups++] = grp->gr_gid;
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}
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}
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toomany:
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endgrent();
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#if NGROUPS
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if (setgroups(ngroups, groups) < 0) {
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perror("setgroups");
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return (-1);
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}
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#else /* NGROUPS */
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ngroups++;
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do {
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if ((i = setgroups(--ngroups, groups) < 0) && (i != EINVAL)) {
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perror("setgroups");
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return (-1);
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}
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} while ((i < 0) && (ngroups > 0));
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#endif /* NGROUPS */
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#endif /* HAVE_SETGROUPS && HAVE_GETGROUPS */
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return (0);
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}
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