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

sysdeps/nacl/irt_syscalls.h

 #ifndef _IRT_SYSCALLS_H
 #define _IRT_SYSCALLS_H
 
 #include <sys/types.h>
 #include <sys/epoll.h>
 #include <poll.h>
 #include <stddef.h>
 #include <fcntl.h>
 #include <time.h>
 
@@ skipping 15 matching lines @@
 extern int (*__nacl_irt_gettod) (struct timeval *tv);
 extern int (*__nacl_irt_clock) (clock_t *ticks);
 extern int (*__nacl_irt_nanosleep) (const struct timespec *req,
                                     struct timespec *rem);
 extern int (*__nacl_irt_sched_yield) (void);
 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,
                                       socklen_t *addrlen);
 extern int (*__nacl_irt_getsockopt) (int sockfd, int level, int optname,
                       void *optval, socklen_t *optlen);
 extern int (*__nacl_irt_setsockopt) (int sockfd, int level, int optname,
                       const void *optval, socklen_t optlen);
 extern int (*__nacl_irt_socketpair) (int domain, int type, int protocol,
                                      int sv[2]);
@@ skipping 109 matching lines @@
 struct robust_list_head
 {
   void *list;
   long int futex_offset;
   void *list_op_pending;
 };
 #endif
 
 #endif
 #endif