/*
* 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) 1988 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1999 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* logdir()
*
* This routine does not use the getpwent(3) library routine
* because the latter uses the stdio package. The allocation of
* storage in this package destroys the integrity of the shell's
* storage allocation.
*/
#include <fcntl.h> /* O_RDONLY */
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#define BUFSIZ 160
static char line[BUFSIZ+1];
static char *
passwdfield(char *p)
{
while (*p && *p != ':')
++p;
if (*p)
*p++ = 0;
return (p);
}
char *
logdir(char *name)
{
char *p;
int i, j;
int pwf;
/* attempt to open the password file */
if ((pwf = open("/etc/passwd", O_RDONLY)) == -1)
return (0);
/* find the matching password entry */
do {
/* get the next line in the password file */
i = read(pwf, line, BUFSIZ);
for (j = 0; j < i; j++)
if (line[j] == '\n')
break;
/* return a null pointer if the whole file has been read */
if (j >= i)
return (0);
line[++j] = 0; /* terminate the line */
/* point at the next line */
(void) lseek(pwf, (long)(j - i), 1);
p = passwdfield(line); /* get the logname */
} while (*name != *line || /* fast pretest */
strcmp(name, line) != 0);
(void) close(pwf);
/* skip the intervening fields */
p = passwdfield(p);
p = passwdfield(p);
p = passwdfield(p);
p = passwdfield(p);
/* return the login directory */
(void) passwdfield(p);
return (p);
}