--- /dev/null
+#ifndef HSYSCALLS_H_INCLUDED
+#define HSYSCALLS_H_INCLUDED
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#ifdef HAVE_POLL
+#include <sys/poll.h>
+#endif
+int Hselect( int max , fd_set *rfds , fd_set *wfds , fd_set *efds , struct timeval *to );
+#ifdef HAVE_POLL
+int Hpoll( struct pollfd *fds , int nfds , int timeout );
+#endif
+int Hsocket( int domain , int type , int protocol );
+int Hfcntl( int fd , int cmd , ... );
+int Hconnect( int fd , const struct sockaddr *addr , int addrlen );
+int Hclose( int fd );
+int Hsendto( int fd , const void *msg , int msglen , unsigned int flags , const struct sockaddr *addr , int addrlen );
+int Hrecvfrom( int fd , void *buf , int buflen , unsigned int flags , struct sockaddr *addr , int *addrlen );
+int Hread( int fd , void *buf , size_t buflen );
+int Hwrite( int fd , const void *buf , size_t len );
+int Hwritev(int fd, const struct iovec *vector, size_t count);
+int Hgettimeofday(struct timeval *tv, struct timezone *tz);
+void* Hmalloc(size_t sz);
+void Hfree(void *ptr);
+void* Hrealloc(void *op, size_t nsz);
+void Hexit(int rv)NONRETURNING;
+#endif