Backport 2010-03-25T08:48:52Z!mituharu@math.s.chiba-u.ac.jp from trunk

1 files changed, 32 insertions, 5 deletions

diff --git a/src/process.c b/src/process.c
index 567300e2f64..77490adaa79 100644
--- a/src/process.c
+++ b/src/process.c
@@ -3573,8 +3573,6 @@ usage: (make-network-process &rest ARGS)  */)
     {
       int optn, optbits;
 
-    retry_connect:
-
       s = socket (lres->ai_family, lres->ai_socktype, lres->ai_protocol);
       if (s < 0)
         {
@@ -3691,6 +3689,38 @@ usage: (make-network-process &rest ARGS)  */)
 #endif
 #endif
 #endif
+      if (xerrno == EINTR)
+        {
+          /* Unlike most other syscalls connect() cannot be called
+             again.  (That would return EALREADY.)  The proper way to
+             wait for completion is select(). */
+          int sc;
+          SELECT_TYPE fdset;
+        retry_select:
+          FD_ZERO (&fdset);
+          FD_SET (s, &fdset);
+          QUIT;
+          sc = select (s + 1, (SELECT_TYPE *)0, &fdset, (SELECT_TYPE *)0,
+                       (EMACS_TIME *)0);
+          if (sc == -1)
+            {
+              if (errno == EINTR) 
+                goto retry_select;
+              else 
+                report_file_error ("select failed", Qnil);
+            }
+          eassert (sc > 0);
+          {
+            int len = sizeof xerrno;
+            eassert (FD_ISSET (s, &fdset));
+            if (getsockopt (s, SOL_SOCKET, SO_ERROR, &xerrno, &len) == -1)
+              report_file_error ("getsockopt failed", Qnil);
+            if (xerrno != 0)
+              errno = xerrno, report_file_error ("error during connect", Qnil);
+            else
+              break;
+          }
+        }
 
       immediate_quit = 0;
 
@@ -3698,9 +3728,6 @@ usage: (make-network-process &rest ARGS)  */)
       specpdl_ptr = specpdl + count1;
       emacs_close (s);
       s = -1;
-
-      if (xerrno == EINTR)
-        goto retry_connect;
     }
 
   if (s >= 0)