1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984 AT&T */ 23 /* All Rights Reserved */ 24 25 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.3 */ 26 27 /*LINTLIBRARY*/ 28 #include <stdio.h> 29 #include <pwd.h> 30 31 extern char *strcpy(), *getlogin(); 32 extern int getuid(); 33 extern struct passwd *getpwuid(); 34 static char res[L_cuserid]; 35 36 char * 37 cuserid(s) 38 char *s; 39 { 40 register struct passwd *pw; 41 register char *p; 42 43 if (s == NULL) 44 s = res; 45 p = getlogin(); 46 if (p != NULL) 47 return (strcpy(s, p)); 48 pw = getpwuid(getuid()); 49 endpwent(); 50 if (pw != NULL) 51 return (strcpy(s, pw->pw_name)); 52 *s = '\0'; 53 return (NULL); 54 } 55