Exit successfully if
file
can be accessed with the specified mode.
mode
is one or more letters of
rwx,
where
r
is for readable,
w
is for writable, and
x
is for executable.
The difference between
access
and
test
is that the latter looks at the permission bits, while the former
checks using the
access(2)
system call. This makes a difference when file systems have been
mounted read-only.
