/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Portions Copyright (c) 1999 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 1.1 (the "License"). You may not use this file * except in compliance with the License. Please obtain a copy of the * License at http://www.apple.com/publicsource 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 OR NON- INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved * * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * The NEXTSTEP Software License Agreement specifies the terms * and conditions for redistribution. * * @(#)pwcache.c 8.1 (Berkeley) 6/4/93 */ #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 */ 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); } 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); }