1ACCESS(2)                     System Calls Manual                    ACCESS(2)
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NAME

6       access - determine accessibility of file
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SYNOPSIS

9       access(name, mode)
10       char *name;
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DESCRIPTION

13       Access  checks the given file name for accessibility according to mode,
14       which is 4 (read), 2 (write) or 1 (execute) or a  combination  thereof.
15       Specifying mode 0 tests whether the directories leading to the file can
16       be searched and the file exists.
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18       An appropriate error indication is returned if name cannot be found  or
19       if any of the desired access modes would not be granted.  On disallowed
20       accesses -1 is returned and the error code is in errno.  0 is  returned
21       from successful tests.
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23       The  user and group IDs with respect to which permission is checked are
24       the real UID and GID of the process, so this call is useful to  set-UID
25       programs.
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27       Notice  that  it is only access bits that are checked.  A directory may
28       be announced as writable by access, but an attempt to open it for writ‐
29       ing  will  fail  (although files may be created there); a file may look
30       executable, but exec will fail unless it is in proper format.
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SEE ALSO

33       stat(2)
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ASSEMBLER

36       (access = 33.)
37       sys access; name; mode
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