fixed signatures for several syscalls that return positive value in correct case

sysdeps/nacl/irt_syscalls.h

Index: sysdeps/nacl/irt_syscalls.h
diff --git a/sysdeps/nacl/irt_syscalls.h b/sysdeps/nacl/irt_syscalls.h
index 8dd58ca9d28778381ee2cb18f5e84b3b9fe1184d..debae6478e99bd3da0c9d1b292930917324e8a3f 100644
--- a/sysdeps/nacl/irt_syscalls.h
+++ b/sysdeps/nacl/irt_syscalls.h
@@ -33,49 +33,49 @@ extern int (*__nacl_irt_sysconf) (int name, int *value);
 extern int (*__nacl_irt_mkdir) (const char* pathname, mode_t mode);
 extern int (*__nacl_irt_rmdir) (const char* pathname);
 extern int (*__nacl_irt_chdir) (const char* pathname);
-extern int (*__nacl_irt_getcwd) (char* buf, size_t size, int* ret);
+extern int (*__nacl_irt_getcwd) (char* buf, size_t size, int *len);
 
-extern int (*__nacl_irt_epoll_create) (int flags); // size
+extern int (*__nacl_irt_epoll_create) (int size, int *fd);
+extern int (*__nacl_irt_epoll_create1) (int flags, int *fd);
 extern int (*__nacl_irt_epoll_ctl) (int epfd, int op, int fd,
                                     struct epoll_event *event);
 extern int (*__nacl_irt_epoll_pwait) (int epfd, struct epoll_event *events,
-                                  int maxevents, int timeout,
-                                  const sigset_t *sigmask, size_t sigset_size);
+            int maxevents, int timeout, const sigset_t *sigmask,
+            size_t sigset_size, int *count);
 extern int (*__nacl_irt_epoll_wait) (int epfd, struct epoll_event *events,
-                                 int maxevents, int timeout);
+                                 int maxevents, int timeout, int *count);
 extern int (*__nacl_irt_poll) (struct pollfd *fds, nfds_t nfds,
-                           int timeout);
+                           int timeout, int *count);
 extern int (*__nacl_irt_ppoll) (struct pollfd *fds, nfds_t nfds,
-                            const struct timespec *timeout,
-                            const sigset_t *sigmask, size_t sigset_size);
-extern int (*__nacl_irt_socket) (int domain, int type, int protocol);
+            const struct timespec *timeout, const sigset_t *sigmask,
+            size_t sigset_size, int *count);
+extern int (*__nacl_irt_socket) (int domain, int type, int protocol, int *sd);
 extern int (*__nacl_irt_accept) (int sockfd, struct sockaddr *addr,
-                                 socklen_t *addrlen);
+                                 socklen_t *addrlen, int *sd);
 extern int (*__nacl_irt_bind) (int sockfd, const struct sockaddr *addr,
                                socklen_t addrlen);
 extern int (*__nacl_irt_listen) (int sockfd, int backlog);
 extern int (*__nacl_irt_connect) (int sockfd, const struct sockaddr *addr,
                                   socklen_t addrlen);
 extern int (*__nacl_irt_send) (int sockfd, const void *buf, size_t len,
-                               int flags, int* ret);
+                               int flags, int *count);
 extern int (*__nacl_irt_sendmsg) (int sockfd, const struct msghdr *msg,
-                                  int flags, int* ret);
+                                  int flags, int *count);
 extern int (*__nacl_irt_sendto) (int sockfd, const void *buf, size_t len,
-                                 int flags, const struct sockaddr *dest_addr,
-                                 socklen_t addrlen, int* ret);
+            int flags, const struct sockaddr *dest_addr, socklen_t addrlen,
+            int *count);
 extern int (*__nacl_irt_recv) (int sockfd, void *buf, size_t len, int flags,
-                               int* ret);
+                               int *count);
 extern int (*__nacl_irt_recvmsg) (int sockfd, struct msghdr *msg,
-                                  int flags, int* ret);
+                                  int flags, int *count);
 extern int (*__nacl_irt_recvfrom) (int sockfd, void *buf, size_t len, int flags,
-                                 struct sockaddr *dest_addr, socklen_t* addrlen,
-				 int* ret);
+            struct sockaddr *dest_addr, socklen_t* addrlen, int *count);
 extern int (*__nacl_irt_select) (int nfds, fd_set *readfds,
                                  fd_set *writefds, fd_set *exceptfds,
-                                 const struct timeval *timeout);
+                                 const struct timeval *timeout, int *count);
 extern int (*__nacl_irt_pselect) (int nfds, fd_set *readfds,
-                                 fd_set *writefds, fd_set *exceptfds,
-                                 const struct timeval *timeout, void* sigmask);
+            fd_set *writefds, fd_set *exceptfds, const struct timeval *timeout,
+			void* sigmask, int *count);
 extern int (*__nacl_irt_getpeername) (int sockfd, struct sockaddr *addr,
                                       socklen_t *addrlen);
 extern int (*__nacl_irt_getsockname) (int sockfd, struct sockaddr *addr,