1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
/* access for MMIXware.
Copyright (C) 2001 Hans-Peter Nilsson.
Permission to use, copy, modify, and distribute this software is freely
granted, provided that this notice is preserved with no changes.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. */
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include "sys/syscall.h"
#include <errno.h>
int
access (const char *fn, int flags)
{
/* Ugh. We don't have stat (), so we can't copy the other
implementations. Opening a directory as a file usually works, so
let's try and open it and use the openability, regardless of what
kind of test or file it is. */
long ret;
/* We'll just assume that if we can open the file for reading, then it's
Z-able, no matter what Z was. */
ret = TRAP3f (SYS_Fopen, TMPFNO, fn, BinaryRead);
if (ret == 0)
{
/* Yes, this was readable. As in other simulator access functions,
we always return success in this case (though the others check
for directory access). */
TRAP1f (SYS_Fclose, TMPFNO);
return 0;
}
errno = EACCES;
return -1;
}
|
