Home | History | Annotate | Line # | Download | only in 4.4 
      1  1.1       cgd /*-
      2  1.1       cgd  * Copyright (c) 1992, 1993
      3  1.1       cgd  *	The Regents of the University of California.  All rights reserved.
      4  1.1       cgd  *
      5  1.1       cgd  * Redistribution and use in source and binary forms, with or without
      6  1.1       cgd  * modification, are permitted provided that the following conditions
      7  1.1       cgd  * are met:
      8  1.1       cgd  * 1. Redistributions of source code must retain the above copyright
      9  1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     10  1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11  1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     12  1.1       cgd  *    documentation and/or other materials provided with the distribution.
     13  1.6       agc  * 3. Neither the name of the University nor the names of its contributors
     14  1.1       cgd  *    may be used to endorse or promote products derived from this software
     15  1.1       cgd  *    without specific prior written permission.
     16  1.1       cgd  *
     17  1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     18  1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     19  1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     20  1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     21  1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     22  1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     23  1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     24  1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     25  1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     26  1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     27  1.1       cgd  * SUCH DAMAGE.
     28  1.1       cgd  */
     29  1.1       cgd 
     30  1.2     lukem #include <sys/cdefs.h>
     31  1.1       cgd #if defined(LIBC_SCCS) && !defined(lint)
     32  1.2     lukem #if 0
     33  1.1       cgd static char sccsid[] = "@(#)cuserid.c	8.1 (Berkeley) 6/4/93";
     34  1.2     lukem #else
     35  1.8     lukem __RCSID("$NetBSD: cuserid.c,v 1.8 2005/04/19 03:38:08 lukem Exp $");
     36  1.2     lukem #endif
     37  1.1       cgd #endif /* LIBC_SCCS and not lint */
     38  1.1       cgd 
     39  1.1       cgd #include <pwd.h>
     40  1.1       cgd #include <stdio.h>
     41  1.1       cgd #include <string.h>
     42  1.1       cgd #include <unistd.h>
     43  1.1       cgd 
     44  1.1       cgd char *
     45  1.7  christos cuserid(char *s)
     46  1.1       cgd {
     47  1.7  christos 	struct passwd *pw, pwres;
     48  1.4   mycroft 	static char buf[L_cuserid];
     49  1.7  christos 	char pwbuf[1024];
     50  1.5     lukem 
     51  1.5     lukem 	/* s may be NULL */
     52  1.1       cgd 
     53  1.8     lukem 	if (getpwuid_r(geteuid(), &pwres, pwbuf, sizeof(pwbuf), &pw) != 0
     54  1.8     lukem 	    || pw == NULL) {
     55  1.7  christos 		if (s != NULL)
     56  1.1       cgd 			*s = '\0';
     57  1.7  christos 		return s;
     58  1.1       cgd 	}
     59  1.7  christos 	if (s == NULL)
     60  1.4   mycroft 		s = buf;
     61  1.4   mycroft 	(void)strncpy(s, pw->pw_name, L_cuserid);
     62  1.7  christos 	return s;
     63  1.1       cgd }
     64