'''file readable''' ''name''

Returns '''1''' if file ''name'' is readable by the current user, '''0''' otherwise.

On NTFS volumes, this doesn't currently take account of the more complex Windows user/group stuff, so can return the wrong value.  Code contributions using 'GetSecurityInfo()' much appreciated.

[RS] 2007-02-16 Quick workaround:
 proc file'readable name {
    set rc [catch {open $name} fp]
    if {$rc==0} {close $fp}
    expr {$rc==0}
 }

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[jdc] 23-oct-2007

After upgrading from Tcl 8.4.9 to 8.4.16, I experienced problems with [file readable] for file on a SMB mount. [file readable] always returns 0, unless the `others` have read privilege on the file.  Tcl 8.5b1 has the same behavior.
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See also:

   * [file]
   * [file owned]
   * [file writable]

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