Secure temporary file: Difference between revisions

=={{header|PicoLisp}}==

The 'tmp' function returns temporary file names which are exclusively for the

current process (based on the process ID). These files are automatically deleted

upon process termination. Background tasks within a single PicoLisp process is

always non-preemptive, therefore dedicated locks are usually not necessary. If

they are (e.g. because such a file name is passed to a child process), explicit

locks with the 'ctl' functions are possible.

<lang PicoLisp>: (out (tmp "foo") (println 123)) # Write tempfile

-> 123

: (in (tmp "foo") (read)) # Read tempfile

-> 123

: (let F (tmp "foo")

(ctl F # Get exclusive lock

(let N (in F (read)) # Atomic increment

(out F (println (inc N))) ) ) )

-> 124</lang>