initgroups.c revision 1.21.56.1
1 1.21.56.1 yamt /* $NetBSD: initgroups.c,v 1.21.56.1 2012/10/30 18:58:47 yamt Exp $ */ 2 1.8 cgd 3 1.1 cgd /* 4 1.5 mycroft * Copyright (c) 1983, 1993 5 1.5 mycroft * The Regents of the University of California. All rights reserved. 6 1.1 cgd * 7 1.1 cgd * Redistribution and use in source and binary forms, with or without 8 1.1 cgd * modification, are permitted provided that the following conditions 9 1.1 cgd * are met: 10 1.1 cgd * 1. Redistributions of source code must retain the above copyright 11 1.1 cgd * notice, this list of conditions and the following disclaimer. 12 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 cgd * notice, this list of conditions and the following disclaimer in the 14 1.1 cgd * documentation and/or other materials provided with the distribution. 15 1.21 agc * 3. Neither the name of the University nor the names of its contributors 16 1.1 cgd * may be used to endorse or promote products derived from this software 17 1.1 cgd * without specific prior written permission. 18 1.1 cgd * 19 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.1 cgd * SUCH DAMAGE. 30 1.1 cgd */ 31 1.1 cgd 32 1.13 christos #include <sys/cdefs.h> 33 1.1 cgd #if defined(LIBC_SCCS) && !defined(lint) 34 1.8 cgd #if 0 35 1.8 cgd static char sccsid[] = "@(#)initgroups.c 8.1 (Berkeley) 6/4/93"; 36 1.8 cgd #else 37 1.21.56.1 yamt __RCSID("$NetBSD: initgroups.c,v 1.21.56.1 2012/10/30 18:58:47 yamt Exp $"); 38 1.8 cgd #endif 39 1.1 cgd #endif /* LIBC_SCCS and not lint */ 40 1.1 cgd 41 1.13 christos #include "namespace.h" 42 1.1 cgd #include <sys/param.h> 43 1.5 mycroft 44 1.17 lukem #include <assert.h> 45 1.1 cgd #include <stdio.h> 46 1.9 jtc #include <unistd.h> 47 1.20 dsl #include <stdlib.h> 48 1.20 dsl #include <errno.h> 49 1.14 jtc 50 1.14 jtc #ifdef __weak_alias 51 1.19 mycroft __weak_alias(initgroups,_initgroups) 52 1.14 jtc #endif 53 1.1 cgd 54 1.1 cgd int 55 1.21.56.1 yamt initgroups(const char *uname, gid_t agroup) 56 1.1 cgd { 57 1.20 dsl gid_t groups_list[NGROUPS]; 58 1.15 perry int ngroups; 59 1.20 dsl gid_t *groups = groups_list; 60 1.20 dsl int rval; 61 1.17 lukem 62 1.17 lukem _DIAGASSERT(uname != NULL); 63 1.1 cgd 64 1.11 mycroft ngroups = NGROUPS; 65 1.20 dsl if (getgrouplist(uname, agroup, groups, &ngroups) == -1) { 66 1.20 dsl int maxgroups = ngroups; 67 1.20 dsl groups = calloc((size_t)maxgroups, sizeof *groups); 68 1.20 dsl if (groups == NULL) 69 1.20 dsl return -1; 70 1.20 dsl if (getgrouplist(uname, agroup, groups, &ngroups) == -1) 71 1.20 dsl ngroups = maxgroups; 72 1.20 dsl } 73 1.20 dsl rval = setgroups(ngroups, groups); 74 1.20 dsl if (rval == -1 && errno == EINVAL) { 75 1.20 dsl int ng = (int)sysconf(_SC_NGROUPS_MAX); 76 1.20 dsl if (ng > 0 && ng < ngroups) 77 1.20 dsl rval = setgroups(ng, groups); 78 1.20 dsl } 79 1.20 dsl if (groups != groups_list) 80 1.20 dsl free(groups); 81 1.20 dsl return rval; 82 1.1 cgd } 83
Indexes created Wed Sep 24 05:09:52 GMT 2025