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/*
* *********************************************************************
* * Copyright (C) 1988, 1990 Stanford University. *
* * Permission to use, copy, modify, and distribute this *
* * software and its documentation for any purpose and without *
* * fee is hereby granted, provided that the above copyright *
* * notice appear in all copies. Stanford University *
* * makes no representations about the suitability of this *
* * software for any purpose. It is provided "as is" without *
* * express or implied warranty. Export of this software outside *
* * of the United States of America may require an export license. *
* *********************************************************************
*/
/*
* front-end to the more general 'access' facility.
*/
#include <stdio.h>
#include <unistd.h> /* defines access() */
#include <fcntl.h>
#include <sys/types.h>
#include "defs.h"
public typedef struct
{
char exist;
char read;
char write;
} Fstat;
public Fstat *FileStatus( name )
char *name;
{
static Fstat ret;
char dir[ 256 ];
register char *s, *q, *p;
if( access( name, R_OK ) == 0 )
ret.read = 1; /* file exists and is readable */
else
ret.read = 0;
if( access( name, W_OK ) == 0 ) /* file exists and is writeable */
{
ret.exist = 1;
ret.write = 1;
return( &ret );
}
if( access( name, F_OK ) == 0 ) /* file exists but isn't writeable */
{
ret.exist = 1;
ret.write = 0;
return( &ret );
}
/* file doesn't exist, check dir. */
p = name;
for( s = p; *s != '\0'; s++ );
while( s > p and *s != '/' ) s--;
if( *s == '/' ) s++;
q = dir;
while( p < s )
*q++ = *p++;
*q++ = '.';
*q = '\0';
if( access( dir, W_OK ) == 0 )
ret.write = 1; /* dir. is writeable */
else
ret.write = 0;
ret.exist = 0;
return( &ret );
}
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