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

sysdeps/nacl/irt_syscalls.c

 #include <string.h>
 #include <sys/stat.h>
 #include <time.h>
 #include <nacl_stat.h>
 #include <nacl_syscalls.h>
 #define stat nacl_abi_stat
 #include <irt.h>
 #undef stat
 #include <irt_syscalls.h>
 #ifdef IS_IN_rtld
@@ skipping 287 matching lines @@
 int (*__nacl_irt_close) (int fd);
 int (*__nacl_irt_read) (int fd, void *buf, size_t count, size_t *nread);
 int (*__nacl_irt_write) (int fd, const void *buf, size_t count, size_t *nwrote);
 int (*__nacl_irt_seek) (int fd, off_t offset, int whence, off_t *new_offset);
 int (*__nacl_irt_dup) (int fd, int *newfd);
 int (*__nacl_irt_dup2) (int fd, int newfd);
 int (*__nacl_irt_fstat) (int fd, struct nacl_abi_stat *);
 int (*__nacl_irt_stat) (const char *pathname, struct nacl_abi_stat *);
 int (*__nacl_irt_getdents) (int fd, struct dirent *, size_t count,
                             size_t *nread);
-int (*__nacl_irt_socket) (int domain, int type, int protocol);
+int (*__nacl_irt_socket) (int domain, int type, int protocol, int *ret);
 int (*__nacl_irt_accept) (int sockfd, struct sockaddr *addr,
-                          socklen_t *addrlen);
+                          socklen_t *addrlen, int *ret);
 int (*__nacl_irt_bind) (int sockfd, const struct sockaddr *addr, socklen_t addrlen);
 int (*__nacl_irt_listen) (int sockfd, int backlog);
 int (*__nacl_irt_connect) (int sockfd, const struct sockaddr *addr,
                            socklen_t addrlen);
 int (*__nacl_irt_send) (int sockfd, const void *buf, size_t len, int flags,
                         int* ret);
 int (*__nacl_irt_sendmsg) (int sockfd, const struct msghdr *msg, int flags,
                            int* ret);
 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 (*__nacl_irt_recv) (int sockfd, void *buf, size_t len, int flags, int* ret);
 int (*__nacl_irt_recvmsg) (int sockfd, struct msghdr *msg, int flags, int* ret);
 int (*__nacl_irt_recvfrom) (int sockfd, void *buf, size_t len, int flags,
                             struct sockaddr *dest_addr, socklen_t* addrlen, int* ret);
 
-int (*__nacl_irt_epoll_create) (int size);
+int (*__nacl_irt_epoll_create) (int size, int *ret);
 int (*__nacl_irt_epoll_ctl) (int epfd, int op, int fd,
                              struct epoll_event *event);
 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 *ret);
 int (*__nacl_irt_epoll_wait) (int epfd, struct epoll_event *events,
-                                int maxevents, int timeout);
+                                int maxevents, int timeout, int *ret);
 int (*__nacl_irt_poll) (struct pollfd *fds, nfds_t nfds,
-                          int timeout);
+                          int timeout, int *ret);
 int (*__nacl_irt_ppoll) (struct pollfd *fds, nfds_t nfds,
-                           const struct timespec *timeout,
-                           const sigset_t *sigmask, size_t sigset_size);
+    const struct timespec *timeout, const sigset_t *sigmask,
+        size_t sigset_size, int *ret);
 int (*__nacl_irt_select) (int nfds, fd_set *readfds,
-                                fd_set *writefds, fd_set *exceptfds,
-                                const struct timeval *timeout);
+    fd_set *writefds, fd_set *exceptfds, const struct timeval *timeout,
+        int *ret);
 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 *ret);
 int (*__nacl_irt_getpeername) (int sockfd, struct sockaddr *addr,
                                socklen_t *addrlen);
 int (*__nacl_irt_getsockname) (int sockfd, struct sockaddr *addr,
                                socklen_t *addrlen);
 int (*__nacl_irt_getsockopt) (int sockfd, int level, int optname,
                void *optval, socklen_t *optlen);
 int (*__nacl_irt_setsockopt) (int sockfd, int level, int optname,
                const void *optval, socklen_t optlen);
 int (*__nacl_irt_socketpair) (int domain, int type, int protocol, int sv[2]);
 int (*__nacl_irt_shutdown) (int sockfd, int how);
@@ skipping 277 matching lines @@
   __nacl_irt_getsockopt = not_implemented;
   __nacl_irt_setsockopt = not_implemented;
   __nacl_irt_socketpair = not_implemented;
   __nacl_irt_shutdown = not_implemented;
 }
 
 size_t nacl_interface_query(const char *interface_ident,
                             void *table, size_t tablesize) {
   return (*__nacl_irt_query)(interface_ident, table, tablesize);
 }