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96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/* from OpenBSD: getgrouplist.c,v 1.12 2005/08/08 08:05:34 espie Exp */
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/*
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* Copyright (c) 1991, 1993
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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. 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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/* OPENBSD ORIGINAL: lib/libc/gen/getgrouplist.c */
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#include "includes.h"
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#ifndef HAVE_GETGROUPLIST
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/*
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* get credential
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*/
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#include <sys/types.h>
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#include <string.h>
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#include <unistd.h>
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#include <grp.h>
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int
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getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt)
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{
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struct group *grp;
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int i, ngroups;
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int ret, maxgroups;
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int bail;
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ret = 0;
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ngroups = 0;
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maxgroups = *grpcnt;
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/*
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* install primary group
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*/
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if (ngroups >= maxgroups) {
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*grpcnt = ngroups;
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return (-1);
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}
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groups[ngroups++] = agroup;
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/*
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* Scan the group file to find additional groups.
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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 (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
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if (groups[i] == grp->gr_gid)
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bail = 1;
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if (bail)
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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 >= maxgroups) {
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ret = -1;
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goto out;
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}
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groups[ngroups++] = grp->gr_gid;
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break;
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}
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}
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}
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out:
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endgrent();
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*grpcnt = ngroups;
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return (ret);
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}
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#endif /* HAVE_GETGROUPLIST */
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