/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/types.h> #include <grp.h> #include <pwd.h> #include <stdio.h> #include <utmp.h> #define NCACHE 64 /* power of 2 */ #define MASK NCACHE - 1 /* bits to store with */ #ifdef NeXT /* lookupd caches users, so there's no point in another cache here */ char * user_from_uid(uid, nouser) uid_t uid; int nouser; { static struct passwd *pw; if ((pw = getpwuid(uid)) == NULL) return (NULL); return pw->pw_name; } #else char * user_from_uid(uid, nouser) uid_t uid; int nouser; { static struct ncache { uid_t uid; char name[UT_NAMESIZE + 1]; } c_uid[NCACHE]; static int pwopen; static char nbuf[15]; /* 32 bits == 10 digits */ register struct passwd *pw; register struct ncache *cp; cp = c_uid + (uid & MASK); if (cp->uid != uid || !*cp->name) { if (pwopen == 0) { setpassent(1); pwopen = 1; } if ((pw = getpwuid(uid)) == NULL) { if (nouser) return (NULL); (void)snprintf(nbuf, sizeof(nbuf), "%u", uid); return (nbuf); } cp->uid = uid; (void)strncpy(cp->name, pw->pw_name, UT_NAMESIZE); cp->name[UT_NAMESIZE] = '\0'; } return (cp->name); } #endif #ifdef NeXT /* lookupd caches groups, so there's no point in another cache here */ char * group_from_gid(gid, nogroup) gid_t gid; int nogroup; { static struct group *gr; if ((gr = getgrgid(gid)) == NULL) return (NULL); return gr->gr_name; } #else char * group_from_gid(gid, nogroup) gid_t gid; int nogroup; { static struct ncache { gid_t gid; char name[UT_NAMESIZE + 1]; } c_gid[NCACHE]; static int gropen; static char nbuf[15]; /* 32 bits == 10 digits */ struct group *gr; struct ncache *cp; cp = c_gid + (gid & MASK); if (cp->gid != gid || !*cp->name) { if (gropen == 0) { setgroupent(1); gropen = 1; } if ((gr = getgrgid(gid)) == NULL) { if (nogroup) return (NULL); (void)snprintf(nbuf, sizeof(nbuf), "%u", gid); return (nbuf); } cp->gid = gid; (void)strncpy(cp->name, gr->gr_name, UT_NAMESIZE); cp->name[UT_NAMESIZE] = '\0'; } return (cp->name); } #endif NeXT