sockets: connect bugfix and use poll in preference to select.

* configure: cosmetics: change HAVE_SYS_SELECT to HAVE_SELECT,
and log that the function rather than the header is being
detected.

* socket.c (fd_timeout): New function, implemented using
poll or select.
(to_connect): select logic replaced with fd_timeout. Bug
fixed: connect requires polling for writability, not
readability. If poll and select are not available,
ignore timeout argument.
(sock_accept): Use fd_timeout; fall back on non-timed-out
accept if poll or select not available.

1 files changed, 2 insertions, 2 deletions

diff --git a/configure b/configure
index ef5f75ec..aa2a738e 100755
--- a/configure
+++ b/configure
@@ -3324,7 +3324,7 @@ else
 fi
 
 if [ $have_sockets ] ; then
-  printf "Checking whether we have <sys/select.h> ... "
+  printf "Checking for select ... "
 
   cat > conftest.c <<!
 #include <sys/select.h>
@@ -3341,7 +3341,7 @@ int main(int argc, char **argv)
 !
   if conftest; then
     printf "yes\n"
-    printf "#define HAVE_SYS_SELECT_H 1\n" >> config.h
+    printf "#define HAVE_SELECT 1\n" >> config.h
   else
     printf "no\n"
   fi