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Top Forums Programming read() without changing atime ? Post 302113226 by Perderabo on Wednesday 4th of April 2007 08:14:08 AM
Old 04-04-2007
You are right, you must have write permission to update atime and/or mtime. Bear in mind that such an update will set ctime and you cannot restore ctime. (ls -lc will show ctime)

If you mount a file system read-only atime will not be updated. Some filesystems have a mount option to inhibit atime updates (which is intended to improve performance.) No other way that I know of.
 

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EIO_FUTIME(3)								 1							     EIO_FUTIME(3)

eio_futime - Change file last access and modification times

SYNOPSIS
resource eio_futime (mixed $fd, float $atime, float $mtime, [int $pri = EIO_PRI_DEFAULT], [callable $callback = NULL], [mixed $data = NULL]) DESCRIPTION
eio_futime(3) changes file last access and modification times. PARAMETERS
o $fd - Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open(3) o $atime - Access time o $mtime - Modification time o $pri -The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, $pri internally is set to EIO_PRI_DEFAULT. o $callback -$callback function is called when the request is done. It should match the following prototype: void callback(mixed $data, int $result[, resource $req]); o $data -is custom data passed to the request. o $result -request-specific result value; basically, the value returned by corresponding system call. o $req -is optional request resource which can be used with functions like eio_get_last_error(3) o $data - Arbitrary variable passed to $callback. RETURN VALUES
eio_futime(3) returns request resource on success or FALSE on error. SEE ALSO eio_utime. PHP Documentation Group EIO_FUTIME(3)
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