getname.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* mailx -- a modified version of a University of California at Berkeley
* mail program
*/
#include "rcv.h"
#include <pwd.h>
#ifdef preSVr4
extern struct passwd *getpwnam();
extern struct passwd *getpwuid();
#endif
/*
* Search the passwd file for a uid. Return name through ref parameter
* if found, indicating success with 0 return. Return -1 on error.
* If -1 is passed as the user id, close the passwd file.
*/
int
getname(uid_t uid, char namebuf[])
{
struct passwd *pw;
if (uid == (uid_t)-1) {
endpwent();
return(0);
}
setpwent();
pw = getpwuid(uid);
if (pw) {
strcpy(namebuf, pw->pw_name);
return(0);
}
return(-1);
}
/*
* Convert the passed name to a user id and return it. Return -1
* on error. Iff the name passed is 0, close the passwd file.
*/
uid_t
getuserid(char name[])
{
struct passwd *pw;
if (name == 0) {
endpwent();
return(0);
}
setpwent();
pw = getpwnam(name);
return pw ? pw->pw_uid : (uid_t)-1;
}