Check that a file is readable:
eval: mayread "foo.txt";
TRUE
A shorter synonym for Perl afficionados:
eval: -R "foo.txt";
TRUE
The full form, for programs (vs scripts):
eval: winix::file::access (filename, [winix::file::MAY_READ]) except _ = FALSE;
TRUE
Related tests:
| -W | maywrite | winix::file::MAY_WRITE |
| -X | mayexecute | winix::file::MAY_EXECUTE |