1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 2025 The FreeBSD Foundation 7 * 8 * Portions of this software were developed by Olivier Certner 9 * <olce@FreeBSD.org> at Kumacom SARL under sponsorship from the FreeBSD 10 * Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 /* For __sym_compat(). */ 38 #include <sys/cdefs.h> 39 40 #include <errno.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 44 /* For freebsd14_setgroups(). */ 45 #include "gen-compat.h" 46 47 static int 48 initgroups_impl(const char *uname, gid_t agroup, 49 int (*setgroups)(int, const gid_t *)) 50 { 51 gid_t *groups; 52 long ngroups_max; 53 int ngroups, ret; 54 55 /* 56 * Provide space for one group more than possible to allow setgroups() 57 * to fail and set 'errno' in case we get back more than {NGROUPS_MAX} + 58 * 1 groups. 59 */ 60 ngroups_max = sysconf(_SC_NGROUPS_MAX) + 2; 61 groups = malloc(sizeof(*groups) * ngroups_max); 62 if (groups == NULL) 63 return (-1); /* malloc() set 'errno'. */ 64 65 ngroups = (int)ngroups_max; 66 (void)getgrouplist(uname, agroup, groups, &ngroups); 67 ret = (*setgroups)(ngroups, groups); 68 69 free(groups); 70 return (ret); /* setgroups() set 'errno'. */ 71 } 72 73 int 74 initgroups(const char *uname, gid_t agroup) 75 { 76 return (initgroups_impl(uname, agroup, setgroups)); 77 } 78 79 int 80 freebsd14_initgroups(const char *uname, gid_t agroup) 81 { 82 return (initgroups_impl(uname, agroup, freebsd14_setgroups)); 83 } 84 85 __sym_compat(initgroups, freebsd14_initgroups, FBSD_1.0); 86