identify.c: Stash a copy of the caller's description string.

[fwd] / endpt.c

diff --git a/endpt.c b/endpt.c
index a1b6ac7..97efef1 100644 (file)
--- a/endpt.c
+++ b/endpt.c
@@ -47,6 +47,7 @@ typedef struct chanpair {
 typedef struct tango {
   struct tango *next, *prev;           /* A big list of all tangos */
   endpt *a, *b;                                /* The two endpoints */
+  char *desc;                          /* Description of the connection */
   unsigned s;                          /* State of the connection */
   chanpair *c;                         /* The pair of channels */
 } tango;
@@ -121,6 +122,10 @@ void endpt_kill(endpt *a)
    */
 
   if (a->f & b->f & EPF_FILE) {
+    if (t->c->ab.err)
+      fw_log(NOW, "[%s] error: %s", t->desc, strerror(t->c->ab.err));
+    else if (t->c->ba.err)
+      fw_log(NOW, "[%s] error: %s", t->desc, strerror(t->c->ba.err));
     if (t->s & EPS_AB)
       chan_close(&t->c->ab);
     if (!(b->f & EPF_PENDING) && (t->s & EPS_BA))
@@ -139,6 +144,8 @@ void endpt_kill(endpt *a)
     t->prev->next = t->next;
   else
     tangos = t->next;
+  if (t->desc)
+    xfree(t->desc);
   DESTROY(t);
 }
 
@@ -167,6 +174,7 @@ void endpt_killall(void)
  *
  * Arguments:  @endpt *a@ = pointer to first endpoint
  *             @endpt *b@ = pointer to second endpoint
+ *             @const char *desc@ = description of connection
  *
  * Returns:    ---
  *
@@ -174,9 +182,13 @@ void endpt_killall(void)
  *             which are already joined; in fact, the the right thing to do
  *             when your endpoint decides that it's not pending any more is
  *             to join it to its partner again.
+ *
+ *             If the endpoints are already connected then the description
+ *             string is ignored.  The endpoint manager takes a copy of the
+ *             string, so you don't need to keep it around.
  */
 
-void endpt_join(endpt *a, endpt *b)
+void endpt_join(endpt *a, endpt *b, const char *desc)
 {
   tango *t = a->t;
 
@@ -191,6 +203,7 @@ void endpt_join(endpt *a, endpt *b)
     a->t = b->t = t;
     t->s = EPS_AB | EPS_BA;
     t->c = 0;
+    t->desc = xstrdup(desc);
     if (tangos)
       tangos->prev = t;
     tangos = t;