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(* TEST
* hasunix
include unix
stderr = "/dev/null"
** bytecode
** native
*)
let cat file =
let fd = Unix.openfile file [Unix.O_RDONLY] 0 in
let buf = Bytes.create 1024 in
let rec cat () =
let n = Unix.read fd buf 0 (Bytes.length buf) in
if n > 0 then (ignore(Unix.write Unix.stdout buf 0 n); cat ())
in cat (); Unix.close fd
let out fd txt =
ignore (Unix.write_substring fd txt 0 (String.length txt))
let _ =
let fd =
Unix.(openfile "./tmp.txt"
[O_WRONLY;O_TRUNC;O_CREAT;O_SHARE_DELETE]
0o600) in
out fd "---\n";
Unix.dup2 ~cloexec:true fd Unix.stderr;
Unix.close fd;
out Unix.stderr "Some output\n";
cat "./tmp.txt";
Sys.remove "./tmp.txt"
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