Correct undesired logging of complete write()

CHANGES

@@ -18,6 +18,8 @@ Corrections:
 	addresses the explicit socksport (2nd address parameter) was ignored.
 	Thanks to Jakub Fišer for reporting this bug.
 
+	Do not log simple successful write with NOTICE level.
+
 Building:
 	Disabling certain features during configure could break build process.
 

sysutils.c

@@ -27,6 +27,11 @@ const int one = 1;
    Returns <0 on unhandled error, errno valid
    Will only return <0 or bytes
 */
+/* Assuming your pipe size is 65536 - find out with:
+   filan -i 1 |grep F_GETPIPE_SZ |sed 's|.*\(F_GETPIPE_SZ=[1-9][0-9]*\).*|\1|'
+   Then we can test partial write with something like:
+   socat -d4 -lu -b 262144 -u /dev/zero,readbytes=262144 -,o-nonblock |{ sleep 3; wc -c; }
+*/
 ssize_t writefull(int fd, const void *buff, size_t bytes) {
    size_t writt = 0;
    ssize_t chk;
@@ -40,16 +45,17 @@ ssize_t writefull(int fd, const void *buff, size_t bytes) {
 	 case EWOULDBLOCK:
 #endif
 	    Warn4("write(%d, %p, "F_Zu"): %s", fd, (const char *)buff+writt, bytes-writt, strerror(errno));
-	    Sleep(1); continue;
+	    Sleep(1);
+	    continue;
 	 default: return -1;
 	 }
       } else if (writt+chk < bytes) {
-	 Warn4("write(%d, %p, "F_Zu"): only wrote "F_Zu" bytes, trying to continue (rev.direction is blocked)",
+	 Warn4("write(%d, %p, "F_Zu"): only wrote "F_Zu" bytes, trying to continue (meanwhile, other direction is blocked)",
 	       fd, (const char *)buff+writt, bytes-writt, chk);
 	 writt += chk;
-      } else {
-	 writt = bytes;
-	 break;
+      } else if (writt == 0) {
+	 /* First attempt, write complete - no extra message */
+	 return chk;
       }
    }
    Notice3("write(%d, %p, "F_Zu") completed", fd, (const char *)buff, bytes);