+(** fifowatcher.ml: Routines to handle non-persistent scripts *)
+
+open Inotify
+open Unix
+open Globals
+open Dirwatcher
+open Printf
+open Splice
+
+let backend_prefix = ref ""
+let direct_fifo_table: (string,(string*string) option) Hashtbl.t = Hashtbl.create 1024
+
+let rec list_check lst elt =
+ match lst with
+ | [] -> false
+ | car::cdr -> if (car==elt) then true else list_check cdr elt
+
+
+
+
+(* 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 _ -> fprintf logfd "[Alert] Access via unauthorized vsys entry: %s\n" fqp_in;flush logfd;None in
+ match entry_info with
+ | Some(execpath,slice_name) ->
+ fprintf logfd "Executing %s for slice %s\n" execpath slice_name;flush logfd;
+ 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_fdin =
+ try openfile fqp_in [O_RDONLY;O_NONBLOCK] 0o777 with
+ e->fprintf logfd "Error opening and connecting FIFO: %s\n" fqp_in;flush logfd;raise e
+ in
+ let fifo_fdout =
+ try openfile fqp_out [O_WRONLY;O_NONBLOCK] 0o777 with
+ _->fprintf logfd "%s Output pipe not open, using stdout in place of %s\n" slice_name fqp_out;flush logfd;stdout
+ in
+ try ignore(create_process execpath [|execpath;slice_name|] fifo_fdin fifo_fdout fifo_fdout) with e -> fprintf logfd "Error executing service: %s\n" execpath;flush logfd
+ end
+ | None -> ()
+
+
+(** Make a pair of fifo entries *)
+let mkentry fqp abspath perm uname =
+ fprintf logfd "Making entry %s->%s\n" fqp abspath;flush logfd;
+ let fifoin=sprintf "%s.in" fqp in
+ let fifoout=sprintf "%s.out" fqp in
+ (try Unix.unlink fifoin with _ -> ());
+ (try Unix.unlink fifoout with _ -> ());
+ (try
+ let infname =(sprintf "%s.in" fqp) in
+ let outfname =(sprintf "%s.out" fqp) in
+ Unix.mkfifo infname 0o666;
+ Unix.mkfifo outfname 0o666;
+ ( (* Make the user the owner of the pipes in a non-chroot environment *)
+ if (!Globals.nochroot) then
+ let pwentry = Unix.getpwnam uname in
+ Unix.chown infname pwentry.pw_uid pwentry.pw_gid;
+ Unix.chown outfname pwentry.pw_uid pwentry.pw_gid
+ );
+ Success
+ with
+ e->fprintf logfd "Error creating FIFO: %s->%s. May be something wrong at the frontend.\n" fqp fifoout;flush logfd;Failed)
+
+(** Open fifos for a session. SHOULD NOt shutdown vsys if the fifos don't exist *)
+let openentry fqp backend_spec =
+ let fqp_in = String.concat "." [fqp;"in"] in
+ Hashtbl.replace direct_fifo_table fqp_in (Some(backend_spec))
+
+(** Close fifos that just got removed *)
+let closeentry fqp =
+ let fqp_in = String.concat "." [fqp;"in"] in
+ Hashtbl.remove direct_fifo_table fqp_in
+
+let direct_fifo_handler dirname evlist fname =
+ printf "Received event %s %s\n" dirname fname;flush Pervasives.stdout;
+ let is_event = list_check evlist in
+ if (is_event Open) then
+ let fqp_in = String.concat "/" [dirname;fname] in
+ connect_file fqp_in
+
+let add_dir_watch fqp =
+ Dirwatcher.add_watch fqp [S_Open] (Some(direct_fifo_handler))
+
+let del_dir_watch fqp =
+ (* XXX Dirwatcher.del_watch fqp *)
+ ()