1 /* $NetBSD: getgrouplist.c,v 1.9 1998/02/03 18:23:44 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)getgrouplist.c 8.2 (Berkeley) 12/8/94"; 40 #else 41 __RCSID("$NetBSD: getgrouplist.c,v 1.9 1998/02/03 18:23:44 perry Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 /* 46 * get credential 47 */ 48 #include "namespace.h" 49 #include <sys/types.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <grp.h> 53 54 #ifdef __weak_alias 55 __weak_alias(getgrouplist,_getgrouplist); 56 #endif 57 58 int 59 getgrouplist(uname, agroup, groups, grpcnt) 60 const char *uname; 61 gid_t agroup; 62 gid_t *groups; 63 int *grpcnt; 64 { 65 struct group *grp; 66 int i, ngroups; 67 int ret, maxgroups; 68 69 ret = 0; 70 ngroups = 0; 71 maxgroups = *grpcnt; 72 73 /* 74 * install primary group 75 */ 76 groups[ngroups++] = agroup; 77 78 /* 79 * Scan the group file to find additional groups. 80 */ 81 setgrent(); 82 while ((grp = getgrent()) != NULL) { 83 if (grp->gr_gid == agroup) 84 continue; 85 for (i = 0; grp->gr_mem[i]; i++) { 86 if (!strcmp(grp->gr_mem[i], uname)) { 87 if (ngroups >= maxgroups) { 88 ret = -1; 89 goto out; 90 } 91 groups[ngroups++] = grp->gr_gid; 92 break; 93 } 94 } 95 } 96 out: 97 endgrent(); 98 *grpcnt = ngroups; 99 return (ret); 100 } 101