/* access for MMIXware.
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/* access for MMIXware.
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Copyright (C) 2001 Hans-Peter Nilsson
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Copyright (C) 2001 Hans-Peter Nilsson
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Permission to use, copy, modify, and distribute this software is
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Permission to use, copy, modify, and distribute this software is
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freely granted, provided that the above copyright notice, this notice
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freely granted, provided that the above copyright notice, this notice
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and the following disclaimer are preserved with no changes.
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and the following disclaimer are preserved with no changes.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. */
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PURPOSE. */
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#include <fcntl.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <unistd.h>
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#include "sys/syscall.h"
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#include "sys/syscall.h"
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#include <errno.h>
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#include <errno.h>
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int
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int
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access (const char *fn, int flags)
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access (const char *fn, int flags)
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{
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{
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/* Ugh. We don't have stat (), so we can't copy the other
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/* Ugh. We don't have stat (), so we can't copy the other
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implementations. Opening a directory as a file usually works, so
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implementations. Opening a directory as a file usually works, so
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let's try and open it and use the openability, regardless of what
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let's try and open it and use the openability, regardless of what
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kind of test or file it is. */
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kind of test or file it is. */
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long ret;
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long ret;
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/* We'll just assume that if we can open the file for reading, then it's
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/* We'll just assume that if we can open the file for reading, then it's
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Z-able, no matter what Z was. */
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Z-able, no matter what Z was. */
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ret = TRAP3f (SYS_Fopen, TMPFNO, fn, BinaryRead);
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ret = TRAP3f (SYS_Fopen, TMPFNO, fn, BinaryRead);
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if (ret == 0)
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if (ret == 0)
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{
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{
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/* Yes, this was readable. As in other simulator access functions,
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/* Yes, this was readable. As in other simulator access functions,
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we always return success in this case (though the others check
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we always return success in this case (though the others check
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for directory access). */
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for directory access). */
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TRAP1f (SYS_Fclose, TMPFNO);
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TRAP1f (SYS_Fclose, TMPFNO);
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return 0;
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return 0;
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}
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}
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errno = EACCES;
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errno = EACCES;
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return -1;
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return -1;
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}
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}
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