/*
* 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 1989 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */
/*LINTLIBRARY*/
/*
* Library routine to GET the Current Working Directory.
* arg1 is a pointer to a character buffer into which the
* path name of the current directory is placed by the
* subroutine. arg1 may be zero, in which case the
* subroutine will call malloc to get the required space.
* arg2 is the length of the buffer space for the path-name.
* If the actual path-name is longer than (arg2-2), or if
* the value of arg2 is not at least 3, the subroutine will
* return a value of zero, with errno set as appropriate.
*/
#include <stdio.h>
#include <sys/errno.h>
extern FILE *popen();
extern char *malloc(), *fgets(), *strchr();
extern int errno, pclose();
char *
getcwd(arg1, arg2)
char *arg1;
int arg2;
{
FILE *pipe;
char *trm;
if(arg2 <= 0) {
errno = EINVAL;
return(0);
}
if(arg1 == 0)
if((arg1 = malloc((unsigned)arg2)) == 0) {
errno = ENOMEM;
return(0);
}
errno = 0;
if((pipe = popen("pwd", "r")) == 0)
return(0);
(void) fgets(arg1, arg2, pipe);
(void) pclose(pipe);
trm = strchr(arg1, '\0');
if(*(trm-1) != '\n') {
errno = ERANGE;
return(0);
}
*(trm-1) = '\0';
return(arg1);
}