diff --git a/libc/Makefile b/libc/Makefile
index 0f2dc966..f243c1ec 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -223,6 +223,7 @@ rename.o \
rmdir.o \
sbrk.o \
scanf.o \
+select.o \
setjmp.o \
setlocale.o \
settermmode.o \
diff --git a/libc/include/sys/select.h b/libc/include/sys/select.h
new file mode 100644
index 00000000..7737294a
--- /dev/null
+++ b/libc/include/sys/select.h
@@ -0,0 +1,68 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with the Sortix C Library. If not, see .
+
+ sys/select.h
+ Waiting on multiple file descriptors.
+
+*******************************************************************************/
+
+
+#ifndef _SYS_SELECT_H
+#define _SYS_SELECT_H 1
+
+#include
+#include /* TODO: HACK: for FD_ZERO */
+
+__BEGIN_DECLS
+
+@include(time_t.h)
+@include(suseconds_t.h)
+
+__BEGIN_DECLS
+#include
+#include
+#include
+__END_DECLS
+
+#define FD_SETSIZE 1024
+#define __FD_ELEM_SIZE ((int) sizeof(__fd_mask))
+#define __FD_ELEM_BITS (8 * __FD_ELEM_SIZE)
+typedef long int __fd_mask;
+typedef struct
+{
+ __fd_mask __fds_bits[FD_SETSIZE / (8 * (int) sizeof(__fd_mask))];
+} fd_set;
+
+#define __FD_INDEX(fd) ((fd) / __FD_ELEM_BITS)
+#define __FD_EXPONENT(fd) ((__fd_mask) (fd) % __FD_ELEM_BITS)
+#define __FD_MASK(fd) (1 << __FD_EXPONENT(fd))
+#define __FD_ACCESS(fd, fdsetp) ((fdsetp)->__fds_bits[__FD_INDEX(fd)])
+
+#define FD_CLR(fd, fdsetp) (__FD_ACCESS(fd, fdsetp) &= ~__FD_MASK(fd))
+#define FD_ISSET(fd, fdsetp) (__FD_ACCESS(fd, fdsetp) & __FD_MASK(fd))
+#define FD_SET(fd, fdsetp) (__FD_ACCESS(fd, fdsetp) |= __FD_MASK(fd))
+#define FD_ZERO(fdsetp) memset(fdsetp, 0, sizeof(fd_set))
+
+/* TODO: pselect */
+int select(int, fd_set* restrict, fd_set* restrict, fd_set* restrict,
+ struct timeval* restrict);
+
+__END_DECLS
+
+#endif
diff --git a/libc/select.cpp b/libc/select.cpp
new file mode 100644
index 00000000..ab54d9da
--- /dev/null
+++ b/libc/select.cpp
@@ -0,0 +1,73 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library 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 Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with the Sortix C Library. If not, see .
+
+ select.cpp
+ Waiting on multiple file descriptors.
+
+*******************************************************************************/
+
+#include
+
+#include
+
+extern "C"
+int select(int nfds, fd_set* restrict readfds, fd_set* restrict writefds,
+ fd_set* restrict exceptfds, struct timeval* restrict timeout)
+{
+ const int READ_EVENTS = POLLIN | POLLRDNORM;
+ const int WRITE_EVENTS = POLLOUT | POLLWRNORM;
+ const int EXCEPT_EVENTS = POLLERR | POLLHUP;
+ struct pollfd fds[FD_SETSIZE];
+ for ( int i = 0; i < nfds; i++ )
+ {
+ fds[i].fd = i;
+ fds[i].events = fds[i].revents = 0;
+ if ( FD_ISSET(i, readfds) )
+ fds[i].events |= READ_EVENTS;
+ if ( FD_ISSET(i, writefds) )
+ fds[i].events |= WRITE_EVENTS;
+ if ( FD_ISSET(i, exceptfds) )
+ fds[i].events |= EXCEPT_EVENTS;
+ if ( !fds[i].events )
+ fds[i].fd = -1;
+ }
+ struct timespec* timeout_tsp = NULL;
+ struct timespec timeout_ts;
+ if ( timeout )
+ timeout_tsp = &timeout_ts,
+ timeout_tsp->tv_sec = timeout->tv_sec,
+ timeout_tsp->tv_nsec = (long) timeout->tv_usec * 1000;
+ int num_occur = ppoll(fds, nfds, timeout_tsp, NULL);
+ if ( num_occur < 0 )
+ return -1;
+ if ( readfds ) FD_ZERO(readfds);
+ if ( writefds ) FD_ZERO(writefds);
+ if ( exceptfds ) FD_ZERO(exceptfds);
+ int ret = 0;
+ for ( int i = 0; i < nfds; i++ )
+ {
+ if ( !fds[i].events )
+ continue;
+ int events = fds[i].revents;
+ if ( events & READ_EVENTS && readfds ) { FD_SET(i, readfds); ret++; }
+ if ( events & WRITE_EVENTS && writefds ) { FD_SET(i, writefds); ret++; }
+ if ( events & EXCEPT_EVENTS && exceptfds ) { FD_SET(i, exceptfds); ret++; }
+ }
+ return ret;
+}