legal.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 */
/*
* Copyright (c) 2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* NAME
* legal - check existence of file
*
* SYNOPSIS
* int legal(char *file)
*
* DESCRIPTION
* legal() checks to see if "file" is a writable file name.
*
* Returns:
* 0 -> file or directory exists, but is unwriteable
* 1 -> file exists writeable
* 2 -> file does not exist, but can be created
*/
#include "mail.h"
int
legal(file)
register char *file;
{
register char *sp;
char dfile[MAXFILENAME];
/*
* If file does not exist then try "." if file name has
* no "/". For file names that have a "/", try check
* for existence of previous directory.
*/
if (access(file, A_EXIST) == A_OK) {
if (access(file, A_WRITE) == A_OK)
return (1);
else return (0);
} else {
if ((sp = strrchr(file, '/')) == NULL) {
strcpy(dfile, ".");
} else if (sp == file) {
strcpy(dfile, "/");
} else {
if ((sp - file + 1) > MAXFILENAME)
return (0);
strncpy(dfile, file, sp - file);
dfile[sp - file] = '\0';
}
if (access(dfile, A_WRITE) == CERROR)
return (0);
return (2);
}
}