-let pidmap: (int,in_pathname * Unix.file_descr) Hashtbl.t = Hashtbl.create 1024
-
-let move_gate fname =
- let tmpfname=String.concat "." [fname;"tmp"] in
- Unix.rename fname tmpfname;
- tmpfname
-
-let move_ungate fname restore =
- Unix.rename restore fname
-
-let list_check lst elt _ =
- let rec list_check_rec lst =
- match lst with
- | [] -> false
- | car::cdr ->
- if (car==elt) then
- true
- else
- list_check_rec cdr
- in
- list_check_rec lst
-
-let openentry_int fifoin =
- let fdin =
- try openfile fifoin [O_RDONLY;O_NONBLOCK] 0o777 with
- e->logprint "Error opening and connecting FIFO: %s,%o\n" fifoin 0o777;raise e
- in
- fdin
-
-(** Open entry safely, by first masking out the file to be opened *)
-let openentry_safe root_dir fqp_in backend_spec =
- let restore = move_gate fqp_in in
- let fd_in = openentry_int restore in
- move_ungate fqp_in restore;
- let (fqp,slice_name) = backend_spec in
- Hashtbl.replace direct_fifo_table fqp_in (Some(root_dir,fqp,slice_name,fd_in))
-
-let openentry root_dir fqp backend_spec =
- let control_file = String.concat "." [fqp;"control"] in
- openentry_safe root_dir fqp_in backend_spec
-
-let reopenentry fifoin =
- let entry = try Hashtbl.find direct_fifo_table fifoin with _ -> None in
- match entry with
- | Some(dir, fqp,slice_name,fd) -> close_if_open fd;openentry_safe dir fifoin (fqp,slice_name)
- | None -> ()
-
-(* vsys is activated when a client opens an in file *)
-let connect_file fqp_in =
- (* Do we care about this file? *)
- let entry_info = try
- Hashtbl.find direct_fifo_table fqp_in with _ -> None in
- match entry_info with
- | Some(_,execpath,slice_name,fifo_fdin) ->
- begin
- let len = String.length fqp_in in
- let fqp = String.sub fqp_in 0 (len-3) in
- let fqp_out = String.concat "." [fqp;"out"] in
- let fifo_fdout =
- try openfile fqp_out [O_WRONLY;O_NONBLOCK] 0o777 with
- _-> (* The client is opening the descriptor too fast *)
- sleep 1;try openfile fqp_out [O_WRONLY;O_NONBLOCK] 0o777 with
- _->
- logprint "%s Output pipe not open, using stdout in place of %s\n" slice_name fqp_out;stdout
- in
- ignore(sigprocmask SIG_BLOCK [Sys.sigchld]);
- (
- clear_nonblock fifo_fdin;
- let pid=try Some(create_process execpath [|execpath;slice_name|] fifo_fdin fifo_fdout fifo_fdout) with e -> None in
- match pid with
- | Some(pid) ->
- if (fifo_fdout <> stdout) then close_if_open fifo_fdout;
- Hashtbl.add pidmap pid (fqp_in,fifo_fdout)
- | None ->logprint "Error executing service: %s\n" execpath;reopenentry fqp_in
- );
- ignore(sigprocmask SIG_UNBLOCK [Sys.sigchld]);
- end
- | None -> ()