1152830Sdavidxu/*- 2152830Sdavidxu * Copyright (c) 1992, 1993 3152830Sdavidxu * The Regents of the University of California. All rights reserved. 4152830Sdavidxu * 5152830Sdavidxu * Redistribution and use in source and binary forms, with or without 6152830Sdavidxu * modification, are permitted provided that the following conditions 7152830Sdavidxu * are met: 8152830Sdavidxu * 1. Redistributions of source code must retain the above copyright 9152830Sdavidxu * notice, this list of conditions and the following disclaimer. 10152830Sdavidxu * 2. Redistributions in binary form must reproduce the above copyright 11152830Sdavidxu * notice, this list of conditions and the following disclaimer in the 12152830Sdavidxu * documentation and/or other materials provided with the distribution. 13152830Sdavidxu * 3. Neither the name of the University nor the names of its contributors 14152830Sdavidxu * may be used to endorse or promote products derived from this software 15152830Sdavidxu * without specific prior written permission. 16152830Sdavidxu * 17152830Sdavidxu * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18152830Sdavidxu * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19152830Sdavidxu * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20152830Sdavidxu * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21152830Sdavidxu * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22152830Sdavidxu * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23152830Sdavidxu * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24152830Sdavidxu * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25152830Sdavidxu * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26152830Sdavidxu * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27152830Sdavidxu * SUCH DAMAGE. 28152830Sdavidxu */ 29152830Sdavidxu 30152830Sdavidxu#include <sys/cdefs.h> 31152830Sdavidxu#if defined(LIBC_SCCS) && !defined(lint) 32152950Sdavidxu#if 0 33152830Sdavidxustatic char sccsid[] = "@(#)cuserid.c 8.1 (Berkeley) 6/4/93"; 34152830Sdavidxu#else 35240297Sdavidxu__RCSID("$NetBSD: cuserid.c,v 1.7 2005/04/01 12:51:07 christos Exp $"); 36152830Sdavidxu#endif 37152830Sdavidxu#endif /* LIBC_SCCS and not lint */ 38152830Sdavidxu 39152950Sdavidxu#include <pwd.h> 40152830Sdavidxu#include <stdio.h> 41152830Sdavidxu#include <string.h> 42152830Sdavidxu#include <unistd.h> 43152830Sdavidxu 44152830Sdavidxuchar * 45152830Sdavidxucuserid(char *s) 46152830Sdavidxu{ 47152830Sdavidxu struct passwd *pw, pwres; 48152830Sdavidxu static char buf[L_cuserid]; 49152830Sdavidxu char pwbuf[1024]; 50152830Sdavidxu 51152830Sdavidxu /* s may be NULL */ 52152830Sdavidxu 53165828Sdavidxu if (getpwuid_r(geteuid(), &pwres, pwbuf, sizeof(pwbuf), &pw) != 0 54165828Sdavidxu || pw == NULL) { 55152950Sdavidxu if (s != NULL) 56152830Sdavidxu *s = '\0'; 57 return s; 58 } 59 if (s == NULL) 60 s = buf; 61 (void)strncpy(s, pw->pw_name, L_cuserid); 62 return s; 63} 64