Added comment syntax to hubmgr's hublist file.

[doldaconnect.git] / lib / guile / hubmgr

diff --git a/lib/guile/hubmgr b/lib/guile/hubmgr
index 48c2b65..e14044d 100755 (executable)
--- a/lib/guile/hubmgr
+++ b/lib/guile/hubmgr
@@ -19,7 +19,7 @@
 ;  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 (use-modules (dolcon ui) (dolcon util))
-(use-modules (ice-9 format) (ice-9 rdelim))
+(use-modules (ice-9 format) (ice-9 rdelim) (ice-9 getopt-long))
 
 (define max-hubs 6)
 (define hub-list '())
@@ -27,10 +27,13 @@
 (define hublist '())
 (define connlist '())
 (define statelist '())
+(define logdest #t)
+(define hl-mtime 0)
 
 (define (logf . args)
   (let ((fmt (car args)) (args (cdr args)))
-    (apply format (cons* #t (string-append fmt "~%") args))))
+    (if logdest
+       (apply format (cons* logdest (string-append fmt "~%") args)))))
 
 (define (list-delta l1 l2)
   (let ((r1 '()) (r2 '()))
@@ -48,22 +51,19 @@
     (list r1 r2 l2)))
 
 (define (read-hl)
-  (catch 'system-error
-        (lambda () 
-          (let ((p (open-input-file hl-file)))
-            (catch 'eof
-                   (lambda ()
-                     (let ((lines '()))
-                       (while #t
-                              (let ((line (read-line p)))
-                                (if (eof-object? line)
-                                    (throw 'eof lines)
-                                    (let ((lexed (dc-lexsexpr line)))
-                                      (if (> (length lexed) 0)
-                                          (set! lines (append lines (list lexed))))))))))
-                   (lambda (s a) (close-port p) a))))
-        (lambda (key . args)
-          '())))
+  (letrec ((read-lines (lambda (lines p)
+                        (let ((line (read-line p)))
+                          (if (eof-object? line)
+                              (begin (close-port p)
+                                     lines)
+                              (read-lines (let ((lexed (dc-lexsexpr line)))
+                                            (if (and (> (length lexed) 0)
+                                                     (not (eq? (string-ref (car lexed) 0) #\#)))
+                                                (append lines (list lexed))
+                                                lines)) p))))))
+    (catch 'system-error
+          (lambda () (read-lines '() (open-input-file hl-file)))
+          (lambda (key . args) '()))))
 
 (define (cklist)
   (set! statelist (let ((nl '()) (ct (current-time)))
@@ -72,12 +72,30 @@
                                    (set! nl (cons o nl))))
                              statelist)
                    nl))
+  (catch 'system-error
+        (lambda ()
+          (let ((mtime (stat:mtime (stat hl-file))))
+            (if (> mtime hl-mtime)
+                (let* ((delta (list-delta hublist (read-hl)))
+                       (same (car delta))
+                       (del (cadr delta))
+                       (new (caddr delta)))
+                  (for-each (lambda (o)
+                              (let ((el (assq o connlist)))
+                                (if el
+                                    (begin (if (not (eq? (cdr el) 'pend))
+                                               (dc-qcmd (list "dcnct" (cdr el))))
+                                           (set! connlist (delq el connlist))))))
+                            del)
+                  (set! hublist (append (map (lambda (o) (car o)) same) new))
+                  (set! hl-mtime mtime)))))
+        (lambda (key . args) '()))
   (for-each (lambda (o)
              (if (and (not (assq o connlist))
                       (not (assq o statelist)))
                  (begin (logf "connecting to ~a" (cadr o))
                         (set! connlist (cons (cons o 'pend) connlist))
-                        (dc-qcmd (list* "cnct" o)
+                        (dc-qcmd (cons* "cnct" o)
                                  (let ((hub o))
                                    (lambda (resp)
                                      (let ((er (dc-extract resp)) (ir (dc-intresp resp)))
@@ -90,12 +108,17 @@
            hublist))
 
 (define (hubmgr-main args)
-  (let ((dc-server #f))
+  (let ((opts (getopt-long args '((nodaemon (single-char #\d) (value #f))
+                                 (server (single-char #\s) (value #t))
+                                 (quiet (single-char #\q) (value #f))))))
+    (if (option-ref opts 'quiet #f) (set! logdest #f))
     (set! hublist (read-hl))
+    (set! hl-mtime (stat:mtime (stat hl-file)))
     (logf "read ~a hubs" (length hublist))
-    (dc-c&l #t dc-server #t)
-    (dc-ecmd-assert 200 "notify" "fn:act" "on")
-    (dc-handle-fn)
+    (dc-c&l (not (option-ref opts 'quiet #f)) (option-ref opts 'server #f) #t)
+    (dc-ecmd-assert 200 "notify" "fn:act" "on" "msg" "on")
+    (dc-ecmd-assert 200 "register" "hubmgr")
+    (dc-util-handle 'fn 'msg)
     (dc-fnproc-reg 'state (lambda (fn)
                            (if (and (eq? (cdr (assq 'state fn)) 'dead)
                                     (assq (cdr (assq 'id fn)) (map (lambda (o) (cons (cdr o) (car o))) connlist)))
@@ -110,10 +133,30 @@
                                   (set! connlist (delq (assq hlf connlist) connlist))
                                   (set! statelist (cons (list hlf (current-time) 10) statelist)))))
                           (cklist)))
+    (dc-msgproc-reg (lambda (sender msg)
+                     (if (equal? (car msg) "exit")
+                         (throw 'quit 0))))
     (dc-loop-reg ".periodic" #f cklist)
     
+    (if (not (option-ref opts 'nodaemon #f))
+       (begin (logf "daemonizing...")
+              (if (= (primitive-fork) 0)
+                  (set! logdest #f)
+                  (primitive-exit 0))))
+    
+    (for-each (lambda (sig) (sigaction sig (lambda (sig) (throw 'quit 0)))) (list SIGINT SIGTERM SIGHUP))
     (cklist)
-    (dc-loop)))
+    (catch 'quit dc-loop
+          (lambda (sig ret)
+            (catch 'quit
+                   (lambda ()
+                     (for-each (lambda (o)
+                                 (if (not (eq? (cdr o) 'pend))
+                                     (dc-ecmd "dcnct" (cdr o))))
+                               connlist)
+                     )
+                   (lambda (sig ret) ret))
+            ret))))
 
 (setlocale LC_ALL "")
 (hubmgr-main (command-line))