1bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman/* $OpenBSD: pwcache.c,v 1.9 2005/08/08 08:05:34 espie Exp $ */ 2bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman/* 3bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * Copyright (c) 1989, 1993 4bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * The Regents of the University of California. All rights reserved. 5bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * 6bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * Redistribution and use in source and binary forms, with or without 7bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * modification, are permitted provided that the following conditions 8bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * are met: 9bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * 1. Redistributions of source code must retain the above copyright 10bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * notice, this list of conditions and the following disclaimer. 11bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * 2. Redistributions in binary form must reproduce the above copyright 12bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * notice, this list of conditions and the following disclaimer in the 13bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * documentation and/or other materials provided with the distribution. 14bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * 3. Neither the name of the University nor the names of its contributors 15bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * may be used to endorse or promote products derived from this software 16bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * without specific prior written permission. 17bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * 18bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman * SUCH DAMAGE. 29bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman */ 30bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 31bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman/* OPENBSD ORIGINAL: lib/libc/gen/pwcache.c */ 32bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 33bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include "includes.h" 34bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 35bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include <sys/types.h> 36bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 37bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include <grp.h> 38bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include <pwd.h> 39bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include <stdio.h> 40bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include <stdlib.h> 41bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#include <string.h> 42bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 43bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#define NCACHE 64 /* power of 2 */ 44bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#define MASK (NCACHE - 1) /* bits to store with */ 45bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 46bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#ifndef HAVE_USER_FROM_UID 47bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartmanchar * 48bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartmanuser_from_uid(uid_t uid, int nouser) 49bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman{ 50bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman static struct ncache { 51bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman uid_t uid; 52bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman char *name; 53bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } c_uid[NCACHE]; 54bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman static int pwopen; 55bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman static char nbuf[15]; /* 32 bits == 10 digits */ 56bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman struct passwd *pw; 57bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman struct ncache *cp; 58bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 59bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman cp = c_uid + (uid & MASK); 60bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (cp->uid != uid || cp->name == NULL) { 61bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (pwopen == 0) { 62bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#ifdef HAVE_SETPASSENT 63bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman setpassent(1); 64bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#endif 65bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman pwopen = 1; 66bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } 67bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if ((pw = getpwuid(uid)) == NULL) { 68bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (nouser) 69bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman return (NULL); 70bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman (void)snprintf(nbuf, sizeof(nbuf), "%u", uid); 71bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } 72bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman cp->uid = uid; 73bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (cp->name != NULL) 74bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman free(cp->name); 75bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman cp->name = strdup(pw ? pw->pw_name : nbuf); 76bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } 77bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman return (cp->name); 78bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman} 79bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#endif 80bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 81bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#ifndef HAVE_GROUP_FROM_GID 82bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartmanchar * 83bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartmangroup_from_gid(gid_t gid, int nogroup) 84bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman{ 85bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman static struct ncache { 86bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman gid_t gid; 87bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman char *name; 88bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } c_gid[NCACHE]; 89bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman static int gropen; 90bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman static char nbuf[15]; /* 32 bits == 10 digits */ 91bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman struct group *gr; 92bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman struct ncache *cp; 93bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman 94bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman cp = c_gid + (gid & MASK); 95bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (cp->gid != gid || cp->name == NULL) { 96bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (gropen == 0) { 97bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#ifdef HAVE_SETGROUPENT 98bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman setgroupent(1); 99bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#endif 100bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman gropen = 1; 101bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } 102bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if ((gr = getgrgid(gid)) == NULL) { 103bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (nogroup) 104bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman return (NULL); 105bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman (void)snprintf(nbuf, sizeof(nbuf), "%u", gid); 106bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } 107bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman cp->gid = gid; 108bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman if (cp->name != NULL) 109bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman free(cp->name); 110bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman cp->name = strdup(gr ? gr->gr_name : nbuf); 111bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman } 112bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman return (cp->name); 113bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman} 114bd77cf78387b72b7b3ea870459077672bf75c3b5Greg Hartman#endif 115