+(* frontend.ml: Routines that implement frontend actions, such as creating directories in a slice, creating pipes etc. *)
+
open Printf
open Unix
open Globals
-open Fifowatcher
+open Directfifowatcher
+open Unixsocketwatcher
+(** frontendhandler class: Methods to create and unlink pipes and directories
+ @param root_dir vsys directory inside a slice
+ @param slice_name actual slice name - set with care, since the acl functionality refers to these names *)
class frontendHandler (root_dir,slice_name) =
object(this)
+
+ (** regex indicating that the script passes fds around *)
+ val fd_regex = Str.regexp "fd_"
+
+ method is_fd_passer fname =
+ try let _ = Str.search_forward fd_regex fname 0
+ in
+ true
+ with
+ | Not_found -> false
+ | _ -> false
+
+ method get_slice_name () = slice_name
+ (** A new script was copied into the backend, make a corresponding entry in
+ the frontend.
+ @param rp Relative path of the entry in the backend
+ @param abspath Absolute path of the entry
+ @param perm Permissions of the entry at the frontend *)
method mkentry (rp:relpath) abspath perm =
- let realperm = perm land (lnot 0o111) in
- match rp with Relpath(rel) ->
- let fqp = String.concat "/" [root_dir;rel] in
- Fifowatcher.mkentry fqp abspath realperm;
- Fifowatcher.openentry fqp (abspath,slice_name) realperm
+ let realperm = perm land (lnot 0o111) in
+ match rp with Relpath(rel) ->
+ let fqp = String.concat "/" [root_dir;rel] in
+ if (this#is_fd_passer rel) then
+ let res = Unixsocketwatcher.mkentry fqp abspath realperm slice_name in
+ begin
+ match res with
+ | Success ->
+ ()
+ | _ ->
+ logprint "Could not create entry %s" abspath
+ end
+ else
+ let res = Directfifowatcher.mkentry fqp abspath realperm slice_name in
+ begin
+ match res with
+ | Success ->
+ Directfifowatcher.openentry root_dir fqp (abspath,slice_name)
+ | _ ->
+ logprint "Could not create entry %s" abspath
+ end
+
+
+
+ (** A new directory was created at the backend, make a corresponding directory
+ at the frontend. Refer to mkentry for parameters *)
method mkdir rp perm =
match rp with Relpath(rel) ->
- let fqp = String.concat "/" [root_dir;rel] in
- try
- let s = Unix.stat fqp in
- if (s.st_kind<>S_DIR) then
- begin
- Unix.unlink fqp;
- Unix.mkdir fqp perm
- end
- else if (s.st_perm <> perm) then
- begin
- printf "Removing directory %s\n" fqp;
- flush Pervasives.stdout;
- Unix.rmdir fqp;
- Unix.mkdir fqp perm
- end
- with Unix.Unix_error(_,_,_) ->
- Unix.mkdir fqp perm
+ let fqp = String.concat "/" [root_dir;rel] in
+ try
+ let s = Unix.stat fqp in
+ if (s.st_kind<>S_DIR) then
+ begin
+ Unix.unlink fqp;
+ Unix.mkdir fqp perm
+ end
+ else if (s.st_perm <> perm) then
+ begin
+ Unix.rmdir fqp;
+ Unix.mkdir fqp perm
+ end;
+ with Unix.Unix_error(_,_,_) ->
+ Unix.mkdir fqp perm;
+ Directfifowatcher.add_dir_watch fqp
+
+ (** Functions corresponding to file deletion/directory removal *)
+ (** *)
method unlink rp =
match rp with Relpath(rel) ->
- let fqp1 = String.concat "/" [root_dir;rel;".in"] in
- let fqp2 = String.concat "/" [root_dir;rel;".out"] in
- try
- Unix.unlink fqp1;
- Unix.unlink fqp2
- with _ ->
- printf "Hm. %s disappeared. Never mind\n" fqp1;flush Pervasives.stdout
+ let fqp = String.concat "/" [root_dir;rel] in
+ let fqp_in = String.concat "." [fqp;"in"] in
+ let fqp_out = String.concat "." [fqp;"out"] in
+ let fqp_control = String.concat "." [fqp;"out"] in
+
+ if (this#is_fd_passer rel) then
+ begin
+ Unixsocketwatcher.closeentry fqp;
+ try
+ Unix.unlink fqp_control
+ with _ ->
+ logprint "Hm. %s disappeared. Looks like slice %s shot itself in the foot\n" fqp (this#get_slice_name ())
+ end
+ else
+ begin
+ Directfifowatcher.closeentry fqp;
+ try
+ Unix.unlink fqp_in;
+ Unix.unlink fqp_out
+ with _ ->
+ logprint "Hm. %s disappeared. Looks like slice %s shot itself in the foot\n" fqp (this#get_slice_name ())
+ end
method rmdir rp =
match rp with Relpath(rel) ->
- let fqp = String.concat "/" [root_dir;rel] in
- try
- Unix.rmdir fqp
- with _ ->
- printf "Hm. %s disappeared. Never mind\n" fqp;flush Pervasives.stdout
+ let fqp = String.concat "/" [root_dir;rel] in
+ Directfifowatcher.del_dir_watch fqp;
+ try
+ Unix.rmdir fqp
+ with _ ->
+ logprint "Hm. %s disappeared or not empty. Looks like slice %s shot itself in the foot\n" fqp (this#get_slice_name ())
+
+ initializer
+ (
+ try
+ let s = Unix.stat root_dir in
+ if (s.st_kind<>S_DIR) then
+ begin
+ Unix.unlink root_dir;
+ Unix.mkdir root_dir 0o700
+ end
+ else if (s.st_perm <> 0o700) then
+ begin
+ Unix.rmdir root_dir;
+ Unix.mkdir root_dir 0o700
+ end;
+ with Unix.Unix_error(_,_,_) ->
+ begin
+ try
+ Unix.mkdir root_dir 0o700;
+ with _ -> ();
+ end);
+ Directfifowatcher.add_dir_watch root_dir
end
git://git.onelab.eu / vsys.git / blobdiff