/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "file64.h"
#include <sys/types.h>
#include <mtlib.h>
#include <ctype.h>
#include <thread.h>
#include <synch.h>
#include <stdio.h>
#include "stdiom.h"
#include "libc.h"
static FILE *pwf;
static mutex_t _pwlock = DEFAULTMUTEX;
const char *PASSWD = "/etc/passwd";
int
getpw(uid_t uid, char buf[])
{
int n, c;
char *bp;
FILE *fp;
rmutex_t *lk;
if (pwf == NULL) {
fp = fopen(PASSWD, "rF");
lmutex_lock(&_pwlock);
if (pwf == NULL) {
if ((pwf = fp) == NULL) {
lmutex_unlock(&_pwlock);
return (1);
}
fp = NULL;
}
lmutex_unlock(&_pwlock);
if (fp != NULL) /* someone beat us to it */
(void) fclose(fp);
}
FLOCKFILE(lk, pwf);
_rewind_unlocked(pwf);
for (;;) {
bp = buf;
while ((c = GETC(pwf)) != '\n') {
if (c == EOF) {
FUNLOCKFILE(lk);
return (1);
}
*bp++ = (char)c;
}
*bp = '\0';
bp = buf;
n = 3;
while (--n)
while ((c = *bp++) != ':')
if (c == '\n') {
FUNLOCKFILE(lk);
return (1);
}
while ((c = *bp++) != ':')
if (isdigit(c))
n = n*10+c-'0';
else
continue;
if (n == uid) {
FUNLOCKFILE(lk);
return (0);
}
}
}