1 /* $NetBSD: getgrouplist.c,v 1.5 1995/06/01 22:51:17 jtc 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)getgrouplist.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 static char rcsid[] = "$NetBSD: getgrouplist.c,v 1.5 1995/06/01 22:51:17 jtc Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 /* 45 * get credential 46 */ 47 #include <sys/types.h> 48 #include <string.h> 49 #include <grp.h> 50 51 int 52 getgrouplist(uname, agroup, groups, grpcnt) 53 const char *uname; 54 int agroup; 55 register int *groups; 56 int *grpcnt; 57 { 58 register struct group *grp; 59 register struct passwd *pw; 60 register int i, ngroups; 61 int ret, maxgroups; 62 63 ret = 0; 64 ngroups = 0; 65 maxgroups = *grpcnt; 66 67 /* 68 * install primary group 69 */ 70 groups[ngroups++] = agroup; 71 72 /* 73 * Scan the group file to find additional groups. 74 */ 75 setgrent(); 76 while (grp = getgrent()) { 77 if (grp->gr_gid == agroup) 78 continue; 79 for (i = 0; grp->gr_mem[i]; i++) { 80 if (!strcmp(grp->gr_mem[i], uname)) { 81 if (ngroups >= maxgroups) { 82 ret = -1; 83 goto out; 84 } 85 groups[ngroups++] = grp->gr_gid; 86 break; 87 } 88 } 89 } 90 out: 91 endgrent(); 92 *grpcnt = ngroups; 93 return (ret); 94 } 95