diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index ad4ed8d..ecb6042 100644
--- a/src/util/Makefile.am
+++ b/src/util/Makefile.am
@@ -2,7 +2,7 @@ AM_CXXFLAGS = $(WARNING_CXXFLAGS) $(PICKY_CXXFLAGS) $(HARDEN_CFLAGS) $(MISC_CXXF
noinst_LIBRARIES = libmoshutil.a
-libmoshutil_a_SOURCES = locale_utils.cc locale_utils.h swrite.cc swrite.h dos_assert.h fatal_assert.h sigfd.h
+libmoshutil_a_SOURCES = locale_utils.cc locale_utils.h swrite.cc swrite.h dos_assert.h fatal_assert.h sigfd.h select.h
if !USE_LIBSTDDJB
libmoshutil_a_SOURCES += sigfd.cc
diff --git a/src/util/select.h b/src/util/select.h
new file mode 100644
index 0000000..539ab30
--- /dev/null
+++ b/src/util/select.h
@@ -0,0 +1,92 @@
+/*
+ Mosh: the mobile shell
+ Copyright 2012 Keith Winstein
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see .
+*/
+
+#ifndef SELECT_HPP
+#define SELECT_HPP
+
+#include
+#include
+
+/* We don't need these on POSIX.1-2001 systems, but there's little reason
+ not to include them. */
+#include
+#include
+#include
+
+static fd_set dummy_fd_set;
+
+/* Convenience wrapper for select(2). */
+class Select {
+public:
+ Select()
+ : max_fd( -1 )
+
+ /* These initializations are not used; they are just
+ here to appease -Weffc++. */
+ , all_fds( dummy_fd_set )
+ , read_fds( dummy_fd_set )
+ , error_fds( dummy_fd_set )
+ {
+ FD_ZERO( &all_fds );
+ FD_ZERO( &read_fds );
+ FD_ZERO( &error_fds );
+ }
+
+ void add_fd( int fd )
+ {
+ if ( fd > max_fd ) {
+ max_fd = fd;
+ }
+ FD_SET( fd, &all_fds );
+ }
+
+ int select( int timeout )
+ {
+ memcpy( &read_fds, &all_fds, sizeof( read_fds ) );
+ memcpy( &error_fds, &all_fds, sizeof( error_fds ) );
+
+ struct timeval tv;
+ struct timeval *tvp = NULL;
+
+ if ( timeout >= 0 ) {
+ // timeout in milliseconds
+ tv.tv_sec = timeout / 1000;
+ tv.tv_usec = 1000 * (timeout % 1000);
+ tvp = &tv;
+ }
+ // negative timeout means wait forever
+
+ return ::select( max_fd + 1, &read_fds, NULL, &error_fds, tvp );
+ }
+
+ bool read( int fd ) const
+ {
+ return FD_ISSET( fd, &read_fds );
+ }
+
+ bool error( int fd ) const
+ {
+ return FD_ISSET( fd, &error_fds );
+ }
+
+private:
+ int max_fd;
+ fd_set all_fds, read_fds, error_fds;
+};
+
+#endif