1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include "includes.h" 31 32 #ifndef HAVE_GETGROUPLIST 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char rcsid[] = "$OpenBSD: getgrouplist.c,v 1.9 2003/06/25 21:16:47 deraadt Exp $"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 /* 39 * get credential 40 */ 41 #include <sys/types.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <grp.h> 45 46 int 47 getgrouplist(uname, agroup, groups, grpcnt) 48 const char *uname; 49 gid_t agroup; 50 register gid_t *groups; 51 int *grpcnt; 52 { 53 register struct group *grp; 54 register int i, ngroups; 55 int ret, maxgroups; 56 int bail; 57 58 ret = 0; 59 ngroups = 0; 60 maxgroups = *grpcnt; 61 62 /* 63 * install primary group 64 */ 65 if (ngroups >= maxgroups) { 66 *grpcnt = ngroups; 67 return (-1); 68 } 69 groups[ngroups++] = agroup; 70 71 /* 72 * Scan the group file to find additional groups. 73 */ 74 setgrent(); 75 while ((grp = getgrent())) { 76 if (grp->gr_gid == agroup) 77 continue; 78 for (bail = 0, i = 0; bail == 0 && i < ngroups; i++) 79 if (groups[i] == grp->gr_gid) 80 bail = 1; 81 if (bail) 82 continue; 83 for (i = 0; grp->gr_mem[i]; i++) { 84 if (!strcmp(grp->gr_mem[i], uname)) { 85 if (ngroups >= maxgroups) { 86 ret = -1; 87 goto out; 88 } 89 groups[ngroups++] = grp->gr_gid; 90 break; 91 } 92 } 93 } 94 out: 95 endgrent(); 96 *grpcnt = ngroups; 97 return (ret); 98 } 99 100 #endif /* HAVE_GETGROUPLIST */ 101