research st: refine io.

@@ -54,9 +54,9 @@
 
 
 
 
 #if EAGAIN != EWOULDBLOCK
 #if EAGAIN != EWOULDBLOCK
-#define _IO_NOT_READY_ERROR  ((errno == EAGAIN) || (errno == EWOULDBLOCK))
+    #define _IO_NOT_READY_ERROR  ((errno == EAGAIN) || (errno == EWOULDBLOCK))
 #else
 #else
-#define _IO_NOT_READY_ERROR  (errno == EAGAIN)
+    #define _IO_NOT_READY_ERROR  (errno == EAGAIN)
 #endif
 #endif
 
 
 #define _LOCAL_MAXIOV  16
 #define _LOCAL_MAXIOV  16
@@ -70,138 +70,147 @@ static void _st_netfd_free_aux_data(_st_netfd_t *fd);
 
 
 int _st_io_init(void)
 int _st_io_init(void)
 {
 {
-  struct sigaction sigact;
-  struct rlimit rlim;
-  int fdlim;
+    struct sigaction sigact;
+    struct rlimit rlim;
+    int fdlim;
 
 
-  /* Ignore SIGPIPE */
-  sigact.sa_handler = SIG_IGN;
-  sigemptyset(&sigact.sa_mask);
-  sigact.sa_flags = 0;
-  if (sigaction(SIGPIPE, &sigact, NULL) < 0)
-    return -1;
-
-  /* Set maximum number of open file descriptors */
-  if (getrlimit(RLIMIT_NOFILE, &rlim) < 0)
-    return -1;
+    /* Ignore SIGPIPE */
+    sigact.sa_handler = SIG_IGN;
+    sigemptyset(&sigact.sa_mask);
+    sigact.sa_flags = 0;
+    if (sigaction(SIGPIPE, &sigact, NULL) < 0) {
+        return -1;
+    }
 
 
-  fdlim = (*_st_eventsys->fd_getlimit)();
-  if (fdlim > 0 && rlim.rlim_max > (rlim_t) fdlim) {
-    rlim.rlim_max = fdlim;
-  }
-  rlim.rlim_cur = rlim.rlim_max;
-  if (setrlimit(RLIMIT_NOFILE, &rlim) < 0)
-    return -1;
-  _st_osfd_limit = (int) rlim.rlim_max;
+    /* Set maximum number of open file descriptors */
+    if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
+        return -1;
+    }
 
 
-  return 0;
+    fdlim = (*_st_eventsys->fd_getlimit)();
+    if (fdlim > 0 && rlim.rlim_max > (rlim_t) fdlim) {
+        rlim.rlim_max = fdlim;
+    }
+    rlim.rlim_cur = rlim.rlim_max;
+    if (setrlimit(RLIMIT_NOFILE, &rlim) < 0) {
+        return -1;
+    }
+    _st_osfd_limit = (int) rlim.rlim_max;
+    
+    return 0;
 }
 }
 
 
 
 
 int st_getfdlimit(void)
 int st_getfdlimit(void)
 {
 {
-  return _st_osfd_limit;
+    return _st_osfd_limit;
 }
 }
 
 
 
 
 void st_netfd_free(_st_netfd_t *fd)
 void st_netfd_free(_st_netfd_t *fd)
 {
 {
-  if (!fd->inuse)
-    return;
-
-  fd->inuse = 0;
-  if (fd->aux_data)
-    _st_netfd_free_aux_data(fd);
-  if (fd->private_data && fd->destructor)
-    (*(fd->destructor))(fd->private_data);
-  fd->private_data = NULL;
-  fd->destructor = NULL;
-  fd->next = _st_netfd_freelist;
-  _st_netfd_freelist = fd;
+    if (!fd->inuse) {
+        return;
+    }
+    
+    fd->inuse = 0;
+    if (fd->aux_data) {
+        _st_netfd_free_aux_data(fd);
+    }
+    if (fd->private_data && fd->destructor) {
+        (*(fd->destructor))(fd->private_data);
+    }
+    fd->private_data = NULL;
+    fd->destructor = NULL;
+    fd->next = _st_netfd_freelist;
+    _st_netfd_freelist = fd;
 }
 }
 
 
 
 
 static _st_netfd_t *_st_netfd_new(int osfd, int nonblock, int is_socket)
 static _st_netfd_t *_st_netfd_new(int osfd, int nonblock, int is_socket)
 {
 {
-  _st_netfd_t *fd;
-  int flags = 1;
-
-  if ((*_st_eventsys->fd_new)(osfd) < 0)
-    return NULL;
-
-  if (_st_netfd_freelist) {
-    fd = _st_netfd_freelist;
-    _st_netfd_freelist = _st_netfd_freelist->next;
-  } else {
-    fd = calloc(1, sizeof(_st_netfd_t));
-    if (!fd)
-      return NULL;
-  }
-
-  fd->osfd = osfd;
-  fd->inuse = 1;
-  fd->next = NULL;
-
-  if (nonblock) {
-    /* Use just one system call */
-    if (is_socket && ioctl(osfd, FIONBIO, &flags) != -1)
-      return fd;
-    /* Do it the Posix way */
-    if ((flags = fcntl(osfd, F_GETFL, 0)) < 0 ||
-    fcntl(osfd, F_SETFL, flags | O_NONBLOCK) < 0) {
-      st_netfd_free(fd);
-      return NULL;
+    _st_netfd_t *fd;
+    int flags = 1;
+    
+    if ((*_st_eventsys->fd_new)(osfd) < 0) {
+        return NULL;
     }
     }
-  }
-
-  return fd;
+    
+    if (_st_netfd_freelist) {
+        fd = _st_netfd_freelist;
+        _st_netfd_freelist = _st_netfd_freelist->next;
+    } else {
+        fd = calloc(1, sizeof(_st_netfd_t));
+        if (!fd) {
+            return NULL;
+        }
+    }
+    
+    fd->osfd = osfd;
+    fd->inuse = 1;
+    fd->next = NULL;
+    
+    if (nonblock) {
+        /* Use just one system call */
+        if (is_socket && ioctl(osfd, FIONBIO, &flags) != -1) {
+            return fd;
+        }
+        /* Do it the Posix way */
+        if ((flags = fcntl(osfd, F_GETFL, 0)) < 0 || fcntl(osfd, F_SETFL, flags | O_NONBLOCK) < 0) {
+            st_netfd_free(fd);
+            return NULL;
+        }
+    }
+    
+    return fd;
 }
 }
 
 
 
 
 _st_netfd_t *st_netfd_open(int osfd)
 _st_netfd_t *st_netfd_open(int osfd)
 {
 {
-  return _st_netfd_new(osfd, 1, 0);
+    return _st_netfd_new(osfd, 1, 0);
 }
 }
 
 
 
 
 _st_netfd_t *st_netfd_open_socket(int osfd)
 _st_netfd_t *st_netfd_open_socket(int osfd)
 {
 {
-  return _st_netfd_new(osfd, 1, 1);
+    return _st_netfd_new(osfd, 1, 1);
 }
 }
 
 
 
 
 int st_netfd_close(_st_netfd_t *fd)
 int st_netfd_close(_st_netfd_t *fd)
 {
 {
-  if ((*_st_eventsys->fd_close)(fd->osfd) < 0)
-    return -1;
+    if ((*_st_eventsys->fd_close)(fd->osfd) < 0) {
+        return -1;
+    }
 
 
-  st_netfd_free(fd);
-  return close(fd->osfd);
+    st_netfd_free(fd);
+    return close(fd->osfd);
 }
 }
 
 
 
 
 int st_netfd_fileno(_st_netfd_t *fd)
 int st_netfd_fileno(_st_netfd_t *fd)
 {
 {
-  return (fd->osfd);
+    return (fd->osfd);
 }
 }
 
 
 
 
-void st_netfd_setspecific(_st_netfd_t *fd, void *value,
-              _st_destructor_t destructor)
+void st_netfd_setspecific(_st_netfd_t *fd, void *value, _st_destructor_t destructor)
 {
 {
-  if (value != fd->private_data) {
-    /* Free up previously set non-NULL data value */
-    if (fd->private_data && fd->destructor)
-      (*(fd->destructor))(fd->private_data);
-  }
-  fd->private_data = value;
-  fd->destructor = destructor;
+    if (value != fd->private_data) {
+        /* Free up previously set non-NULL data value */
+        if (fd->private_data && fd->destructor) {
+            (*(fd->destructor))(fd->private_data);
+        }
+    }
+    fd->private_data = value;
+    fd->destructor = destructor;
 }
 }
 
 
 
 
 void *st_netfd_getspecific(_st_netfd_t *fd)
 void *st_netfd_getspecific(_st_netfd_t *fd)
 {
 {
-  return (fd->private_data);
+    return (fd->private_data);
 }
 }
 
 
 
 
@@ -210,76 +219,78 @@ void *st_netfd_getspecific(_st_netfd_t *fd)
  */
  */
 int st_netfd_poll(_st_netfd_t *fd, int how, st_utime_t timeout)
 int st_netfd_poll(_st_netfd_t *fd, int how, st_utime_t timeout)
 {
 {
-  struct pollfd pd;
-  int n;
-
-  pd.fd = fd->osfd;
-  pd.events = (short) how;
-  pd.revents = 0;
-
-  if ((n = st_poll(&pd, 1, timeout)) < 0)
-    return -1;
-  if (n == 0) {
-    /* Timed out */
-    errno = ETIME;
-    return -1;
-  }
-  if (pd.revents & POLLNVAL) {
-    errno = EBADF;
-    return -1;
-  }
-
-  return 0;
+    struct pollfd pd;
+    int n;
+    
+    pd.fd = fd->osfd;
+    pd.events = (short) how;
+    pd.revents = 0;
+    
+    if ((n = st_poll(&pd, 1, timeout)) < 0) {
+        return -1;
+    }
+    if (n == 0) {
+        /* Timed out */
+        errno = ETIME;
+        return -1;
+    }
+    if (pd.revents & POLLNVAL) {
+        errno = EBADF;
+        return -1;
+    }
+    
+    return 0;
 }
 }
 
 
-
 #ifdef MD_ALWAYS_UNSERIALIZED_ACCEPT
 #ifdef MD_ALWAYS_UNSERIALIZED_ACCEPT
 /* No-op */
 /* No-op */
 int st_netfd_serialize_accept(_st_netfd_t *fd)
 int st_netfd_serialize_accept(_st_netfd_t *fd)
 {
 {
-  fd->aux_data = NULL;
-  return 0;
+    fd->aux_data = NULL;
+    return 0;
 }
 }
 
 
 /* No-op */
 /* No-op */
 static void _st_netfd_free_aux_data(_st_netfd_t *fd)
 static void _st_netfd_free_aux_data(_st_netfd_t *fd)
 {
 {
-  fd->aux_data = NULL;
-}
-
-_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen,
-               st_utime_t timeout)
-{
-  int osfd, err;
-  _st_netfd_t *newfd;
-
-  while ((osfd = accept(fd->osfd, addr, (socklen_t *)addrlen)) < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return NULL;
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return NULL;
-  }
-
-  /* On some platforms the new socket created by accept() inherits */
-  /* the nonblocking attribute of the listening socket */
+    fd->aux_data = NULL;
+}
+
+_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen, st_utime_t timeout)
+{
+    int osfd, err;
+    _st_netfd_t *newfd;
+    
+    while ((osfd = accept(fd->osfd, addr, (socklen_t *)addrlen)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return NULL;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return NULL;
+        }
+    }
+    
+    /* On some platforms the new socket created by accept() inherits */
+    /* the nonblocking attribute of the listening socket */
 #if defined (MD_ACCEPT_NB_INHERITED)
 #if defined (MD_ACCEPT_NB_INHERITED)
-  newfd = _st_netfd_new(osfd, 0, 1);
+    newfd = _st_netfd_new(osfd, 0, 1);
 #elif defined (MD_ACCEPT_NB_NOT_INHERITED)
 #elif defined (MD_ACCEPT_NB_NOT_INHERITED)
-  newfd = _st_netfd_new(osfd, 1, 1);
+    newfd = _st_netfd_new(osfd, 1, 1);
 #else
 #else
-#error Unknown OS
+    #error Unknown OS
 #endif
 #endif
-
-  if (!newfd) {
-    err = errno;
-    close(osfd);
-    errno = err;
-  }
-
-  return newfd;
+    
+    if (!newfd) {
+        err = errno;
+        close(osfd);
+        errno = err;
+    }
+    
+    return newfd;
 }
 }
 
 
 #else /* MD_ALWAYS_UNSERIALIZED_ACCEPT */
 #else /* MD_ALWAYS_UNSERIALIZED_ACCEPT */
@@ -291,488 +302,507 @@ _st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen,
  */
  */
 int st_netfd_serialize_accept(_st_netfd_t *fd)
 int st_netfd_serialize_accept(_st_netfd_t *fd)
 {
 {
-  _st_netfd_t **p;
-  int osfd[2], err;
-
-  if (fd->aux_data) {
-    errno = EINVAL;
-    return -1;
-  }
-  if ((p = (_st_netfd_t **)calloc(2, sizeof(_st_netfd_t *))) == NULL)
-    return -1;
-  if (pipe(osfd) < 0) {
+    _st_netfd_t **p;
+    int osfd[2], err;
+    
+    if (fd->aux_data) {
+        errno = EINVAL;
+        return -1;
+    }
+    if ((p = (_st_netfd_t **)calloc(2, sizeof(_st_netfd_t *))) == NULL) {
+        return -1;
+    }
+    if (pipe(osfd) < 0) {
+        free(p);
+        return -1;
+    }
+    if ((p[0] = st_netfd_open(osfd[0])) != NULL && (p[1] = st_netfd_open(osfd[1])) != NULL && write(osfd[1], " ", 1) == 1) {
+        fd->aux_data = p;
+        return 0;
+    }
+    /* Error */
+    err = errno;
+    if (p[0]) {
+        st_netfd_free(p[0]);
+    }
+    if (p[1]) {
+        st_netfd_free(p[1]);
+    }
+    close(osfd[0]);
+    close(osfd[1]);
     free(p);
     free(p);
+    errno = err;
+    
     return -1;
     return -1;
-  }
-  if ((p[0] = st_netfd_open(osfd[0])) != NULL &&
-      (p[1] = st_netfd_open(osfd[1])) != NULL &&
-      write(osfd[1], " ", 1) == 1) {
-    fd->aux_data = p;
-    return 0;
-  }
-  /* Error */
-  err = errno;
-  if (p[0])
-    st_netfd_free(p[0]);
-  if (p[1])
-    st_netfd_free(p[1]);
-  close(osfd[0]);
-  close(osfd[1]);
-  free(p);
-  errno = err;
-
-  return -1;
 }
 }
 
 
 static void _st_netfd_free_aux_data(_st_netfd_t *fd)
 static void _st_netfd_free_aux_data(_st_netfd_t *fd)
 {
 {
-  _st_netfd_t **p = (_st_netfd_t **) fd->aux_data;
-
-  st_netfd_close(p[0]);
-  st_netfd_close(p[1]);
-  free(p);
-  fd->aux_data = NULL;
-}
-
-_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen,
-               st_utime_t timeout)
-{
-  int osfd, err;
-  _st_netfd_t *newfd;
-  _st_netfd_t **p = (_st_netfd_t **) fd->aux_data;
-  ssize_t n;
-  char c;
-
-  for ( ; ; ) {
-    if (p == NULL) {
-      osfd = accept(fd->osfd, addr, (socklen_t *)addrlen);
-    } else {
-      /* Get the lock */
-      n = st_read(p[0], &c, 1, timeout);
-      if (n < 0)
-    return NULL;
-      ST_ASSERT(n == 1);
-      /* Got the lock */
-      osfd = accept(fd->osfd, addr, (socklen_t *)addrlen);
-      /* Unlock */
-      err = errno;
-      n = st_write(p[1], &c, 1, timeout);
-      ST_ASSERT(n == 1);
-      errno = err;
-    }
-    if (osfd >= 0)
-      break;
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return NULL;
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return NULL;
-  }
-
-  /* On some platforms the new socket created by accept() inherits */
-  /* the nonblocking attribute of the listening socket */
+    _st_netfd_t **p = (_st_netfd_t **) fd->aux_data;
+    
+    st_netfd_close(p[0]);
+    st_netfd_close(p[1]);
+    free(p);
+    fd->aux_data = NULL;
+}
+
+_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen, st_utime_t timeout)
+{
+    int osfd, err;
+    _st_netfd_t *newfd;
+    _st_netfd_t **p = (_st_netfd_t **) fd->aux_data;
+    ssize_t n;
+    char c;
+    
+    for ( ; ; ) {
+        if (p == NULL) {
+            osfd = accept(fd->osfd, addr, (socklen_t *)addrlen);
+        } else {
+            /* Get the lock */
+            n = st_read(p[0], &c, 1, timeout);
+            if (n < 0) {
+                return NULL;
+            }
+            ST_ASSERT(n == 1);
+            /* Got the lock */
+            osfd = accept(fd->osfd, addr, (socklen_t *)addrlen);
+            /* Unlock */
+            err = errno;
+            n = st_write(p[1], &c, 1, timeout);
+            ST_ASSERT(n == 1);
+            errno = err;
+        }
+        if (osfd >= 0) {
+            break;
+        }
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return NULL;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return NULL;
+        }
+    }
+    
+    /* On some platforms the new socket created by accept() inherits */
+    /* the nonblocking attribute of the listening socket */
 #if defined (MD_ACCEPT_NB_INHERITED)
 #if defined (MD_ACCEPT_NB_INHERITED)
-  newfd = _st_netfd_new(osfd, 0, 1);
+    newfd = _st_netfd_new(osfd, 0, 1);
 #elif defined (MD_ACCEPT_NB_NOT_INHERITED)
 #elif defined (MD_ACCEPT_NB_NOT_INHERITED)
-  newfd = _st_netfd_new(osfd, 1, 1);
+    newfd = _st_netfd_new(osfd, 1, 1);
 #else
 #else
-#error Unknown OS
+    #error Unknown OS
 #endif
 #endif
-
-  if (!newfd) {
-    err = errno;
-    close(osfd);
-    errno = err;
-  }
-
-  return newfd;
+    
+    if (!newfd) {
+        err = errno;
+        close(osfd);
+        errno = err;
+    }
+    
+    return newfd;
 }
 }
 #endif /* MD_ALWAYS_UNSERIALIZED_ACCEPT */
 #endif /* MD_ALWAYS_UNSERIALIZED_ACCEPT */
 
 
 
 
-int st_connect(_st_netfd_t *fd, const struct sockaddr *addr, int addrlen,
-           st_utime_t timeout)
-{
-  int n, err = 0;
-
-  while (connect(fd->osfd, addr, addrlen) < 0) {
-    if (errno != EINTR) {
-      /*
-       * On some platforms, if connect() is interrupted (errno == EINTR)
-       * after the kernel binds the socket, a subsequent connect()
-       * attempt will fail with errno == EADDRINUSE.  Ignore EADDRINUSE
-       * iff connect() was previously interrupted.  See Rich Stevens'
-       * "UNIX Network Programming," Vol. 1, 2nd edition, p. 413
-       * ("Interrupted connect").
-       */
-      if (errno != EINPROGRESS && (errno != EADDRINUSE || err == 0))
-    return -1;
-      /* Wait until the socket becomes writable */
-      if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
-    return -1;
-      /* Try to find out whether the connection setup succeeded or failed */
-      n = sizeof(int);
-      if (getsockopt(fd->osfd, SOL_SOCKET, SO_ERROR, (char *)&err,
-             (socklen_t *)&n) < 0)
-    return -1;
-      if (err) {
-    errno = err;
-    return -1;
-      }
-      break;
+int st_connect(_st_netfd_t *fd, const struct sockaddr *addr, int addrlen, st_utime_t timeout)
+{
+    int n, err = 0;
+    
+    while (connect(fd->osfd, addr, addrlen) < 0) {
+        if (errno != EINTR) {
+            /*
+            * On some platforms, if connect() is interrupted (errno == EINTR)
+            * after the kernel binds the socket, a subsequent connect()
+            * attempt will fail with errno == EADDRINUSE.  Ignore EADDRINUSE
+            * iff connect() was previously interrupted.  See Rich Stevens'
+            * "UNIX Network Programming," Vol. 1, 2nd edition, p. 413
+            * ("Interrupted connect").
+            */
+            if (errno != EINPROGRESS && (errno != EADDRINUSE || err == 0)) {
+                return -1;
+            }
+            /* Wait until the socket becomes writable */
+            if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
+                return -1;
+            }
+            /* Try to find out whether the connection setup succeeded or failed */
+            n = sizeof(int);
+            if (getsockopt(fd->osfd, SOL_SOCKET, SO_ERROR, (char *)&err, (socklen_t *)&n) < 0) {
+                return -1;
+            }
+            if (err) {
+                errno = err;
+                return -1;
+            }
+            break;
+        }
+        err = 1;
     }
     }
-    err = 1;
-  }
-
-  return 0;
+    
+    return 0;
 }
 }
 
 
 
 
 ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
 ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
 {
 {
-  ssize_t n;
-
-  while ((n = read(fd->osfd, buf, nbyte)) < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return -1;
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return -1;
-  }
-
-  return n;
+    ssize_t n;
+    
+    while ((n = read(fd->osfd, buf, nbyte)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return -1;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return -1;
+        }
+    }
+    
+    return n;
 }
 }
 
 
 
 
-int st_read_resid(_st_netfd_t *fd, void *buf, size_t *resid,
-          st_utime_t timeout)
+int st_read_resid(_st_netfd_t *fd, void *buf, size_t *resid, st_utime_t timeout)
 {
 {
-  struct iovec iov, *riov;
-  int riov_size, rv;
-
-  iov.iov_base = buf;
-  iov.iov_len = *resid;
-  riov = &iov;
-  riov_size = 1;
-  rv = st_readv_resid(fd, &riov, &riov_size, timeout);
-  *resid = iov.iov_len;
-  return rv;
+    struct iovec iov, *riov;
+    int riov_size, rv;
+    
+    iov.iov_base = buf;
+    iov.iov_len = *resid;
+    riov = &iov;
+    riov_size = 1;
+    rv = st_readv_resid(fd, &riov, &riov_size, timeout);
+    *resid = iov.iov_len;
+    return rv;
 }
 }
 
 
 
 
-ssize_t st_readv(_st_netfd_t *fd, const struct iovec *iov, int iov_size,
-         st_utime_t timeout)
-{
-  ssize_t n;
-
-  while ((n = readv(fd->osfd, iov, iov_size)) < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return -1;
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return -1;
-  }
-
-  return n;
-}
-
-int st_readv_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size,
-           st_utime_t timeout)
+ssize_t st_readv(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utime_t timeout)
 {
 {
-  ssize_t n;
-
-  while (*iov_size > 0) {
-    if (*iov_size == 1)
-      n = read(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
-    else
-      n = readv(fd->osfd, *iov, *iov_size);
-    if (n < 0) {
-      if (errno == EINTR)
-    continue;
-      if (!_IO_NOT_READY_ERROR)
-    return -1;
-    } else if (n == 0)
-      break;
-    else {
-      while ((size_t) n >= (*iov)->iov_len) {
-    n -= (*iov)->iov_len;
-    (*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
-    (*iov)->iov_len = 0;
-    (*iov)++;
-    (*iov_size)--;
-    if (n == 0)
-      break;
-      }
-      if (*iov_size == 0)
-    break;
-      (*iov)->iov_base = (char *) (*iov)->iov_base + n;
-      (*iov)->iov_len -= n;
+    ssize_t n;
+    
+    while ((n = readv(fd->osfd, iov, iov_size)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return -1;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return -1;
+        }
     }
     }
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return -1;
-  }
-
-  return 0;
+    
+    return n;
+}
+
+int st_readv_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime_t timeout)
+{
+    ssize_t n;
+    
+    while (*iov_size > 0) {
+        if (*iov_size == 1) {
+            n = read(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
+        } else {
+            n = readv(fd->osfd, *iov, *iov_size);
+        }
+        if (n < 0) {
+            if (errno == EINTR) {
+                continue;
+            }
+            if (!_IO_NOT_READY_ERROR) {
+                return -1;
+            }
+        } else if (n == 0) {
+            break;
+        } else {
+            while ((size_t) n >= (*iov)->iov_len) {
+                n -= (*iov)->iov_len;
+                (*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
+                (*iov)->iov_len = 0;
+                (*iov)++;
+                (*iov_size)--;
+                if (n == 0) {
+                    break;
+                }
+            }
+            if (*iov_size == 0) {
+                break;
+            }
+            (*iov)->iov_base = (char *) (*iov)->iov_base + n;
+            (*iov)->iov_len -= n;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return -1;
+        }
+    }
+    
+    return 0;
 }
 }
 
 
-
-ssize_t st_read_fully(_st_netfd_t *fd, void *buf, size_t nbyte,
-              st_utime_t timeout)
+ssize_t st_read_fully(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
 {
 {
-  size_t resid = nbyte;
-  return st_read_resid(fd, buf, &resid, timeout) == 0 ?
-    (ssize_t) (nbyte - resid) : -1;
+    size_t resid = nbyte;
+    return st_read_resid(fd, buf, &resid, timeout) == 0 ? (ssize_t) (nbyte - resid) : -1;
 }
 }
 
 
-
-int st_write_resid(_st_netfd_t *fd, const void *buf, size_t *resid,
-           st_utime_t timeout)
+int st_write_resid(_st_netfd_t *fd, const void *buf, size_t *resid, st_utime_t timeout)
 {
 {
-  struct iovec iov, *riov;
-  int riov_size, rv;
-
-  iov.iov_base = (void *) buf;        /* we promise not to modify buf */
-  iov.iov_len = *resid;
-  riov = &iov;
-  riov_size = 1;
-  rv = st_writev_resid(fd, &riov, &riov_size, timeout);
-  *resid = iov.iov_len;
-  return rv;
+    struct iovec iov, *riov;
+    int riov_size, rv;
+    
+    iov.iov_base = (void *) buf;        /* we promise not to modify buf */
+    iov.iov_len = *resid;
+    riov = &iov;
+    riov_size = 1;
+    rv = st_writev_resid(fd, &riov, &riov_size, timeout);
+    *resid = iov.iov_len;
+    return rv;
 }
 }
 
 
-
-ssize_t st_write(_st_netfd_t *fd, const void *buf, size_t nbyte,
-         st_utime_t timeout)
+ssize_t st_write(_st_netfd_t *fd, const void *buf, size_t nbyte, st_utime_t timeout)
 {
 {
-  size_t resid = nbyte;
-  return st_write_resid(fd, buf, &resid, timeout) == 0 ?
-    (ssize_t) (nbyte - resid) : -1;
+    size_t resid = nbyte;
+    return st_write_resid(fd, buf, &resid, timeout) == 0 ? (ssize_t) (nbyte - resid) : -1;
 }
 }
 
 
-
-ssize_t st_writev(_st_netfd_t *fd, const struct iovec *iov, int iov_size,
-          st_utime_t timeout)
+ssize_t st_writev(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utime_t timeout)
 {
 {
-  ssize_t n, rv;
-  size_t nleft, nbyte;
-  int index, iov_cnt;
-  struct iovec *tmp_iov;
-  struct iovec local_iov[_LOCAL_MAXIOV];
-
-  /* Calculate the total number of bytes to be sent */
-  nbyte = 0;
-  for (index = 0; index < iov_size; index++)
-    nbyte += iov[index].iov_len;
-
-  rv = (ssize_t)nbyte;
-  nleft = nbyte;
-  tmp_iov = (struct iovec *) iov;    /* we promise not to modify iov */
-  iov_cnt = iov_size;
-
-  while (nleft > 0) {
-    if (iov_cnt == 1) {
-      if (st_write(fd, tmp_iov[0].iov_base, nleft, timeout) != (ssize_t) nleft)
-    rv = -1;
-      break;
+    ssize_t n, rv;
+    size_t nleft, nbyte;
+    int index, iov_cnt;
+    struct iovec *tmp_iov;
+    struct iovec local_iov[_LOCAL_MAXIOV];
+    
+    /* Calculate the total number of bytes to be sent */
+    nbyte = 0;
+    for (index = 0; index < iov_size; index++) {
+        nbyte += iov[index].iov_len;
     }
     }
-    if ((n = writev(fd->osfd, tmp_iov, iov_cnt)) < 0) {
-      if (errno == EINTR)
-    continue;
-      if (!_IO_NOT_READY_ERROR) {
-    rv = -1;
-    break;
-      }
-    } else {
-      if ((size_t) n == nleft)
-    break;
-      nleft -= n;
-      /* Find the next unwritten vector */
-      n = (ssize_t)(nbyte - nleft);
-      for (index = 0; (size_t) n >= iov[index].iov_len; index++)
-    n -= iov[index].iov_len;
-
-      if (tmp_iov == iov) {
-    /* Must copy iov's around */
-    if (iov_size - index <= _LOCAL_MAXIOV) {
-      tmp_iov = local_iov;
-    } else {
-      tmp_iov = calloc(1, (iov_size - index) * sizeof(struct iovec));
-      if (tmp_iov == NULL)
-        return -1;
-    }
-      }
-
-      /* Fill in the first partial read */
-      tmp_iov[0].iov_base = &(((char *)iov[index].iov_base)[n]);
-      tmp_iov[0].iov_len = iov[index].iov_len - n;
-      index++;
-      /* Copy the remaining vectors */
-      for (iov_cnt = 1; index < iov_size; iov_cnt++, index++) {
-    tmp_iov[iov_cnt].iov_base = iov[index].iov_base;
-    tmp_iov[iov_cnt].iov_len = iov[index].iov_len;
-      }
+    
+    rv = (ssize_t)nbyte;
+    nleft = nbyte;
+    tmp_iov = (struct iovec *) iov;    /* we promise not to modify iov */
+    iov_cnt = iov_size;
+    
+    while (nleft > 0) {
+        if (iov_cnt == 1) {
+            if (st_write(fd, tmp_iov[0].iov_base, nleft, timeout) != (ssize_t) nleft) {
+                rv = -1;
+            }
+            break;
+        }
+        if ((n = writev(fd->osfd, tmp_iov, iov_cnt)) < 0) {
+            if (errno == EINTR) {
+                continue;
+            }
+            if (!_IO_NOT_READY_ERROR) {
+                rv = -1;
+                break;
+            }
+        } else {
+            if ((size_t) n == nleft) {
+                break;
+            }
+            nleft -= n;
+            /* Find the next unwritten vector */
+            n = (ssize_t)(nbyte - nleft);
+            for (index = 0; (size_t) n >= iov[index].iov_len; index++) {
+                n -= iov[index].iov_len;
+            }
+            
+            if (tmp_iov == iov) {
+                /* Must copy iov's around */
+                if (iov_size - index <= _LOCAL_MAXIOV) {
+                    tmp_iov = local_iov;
+                } else {
+                    tmp_iov = calloc(1, (iov_size - index) * sizeof(struct iovec));
+                    if (tmp_iov == NULL) {
+                        return -1;
+                    }
+                }
+            }
+            
+            /* Fill in the first partial read */
+            tmp_iov[0].iov_base = &(((char *)iov[index].iov_base)[n]);
+            tmp_iov[0].iov_len = iov[index].iov_len - n;
+            index++;
+            /* Copy the remaining vectors */
+            for (iov_cnt = 1; index < iov_size; iov_cnt++, index++) {
+                tmp_iov[iov_cnt].iov_base = iov[index].iov_base;
+                tmp_iov[iov_cnt].iov_len = iov[index].iov_len;
+            }
+        }
+        /* Wait until the socket becomes writable */
+        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
+            rv = -1;
+            break;
+        }
     }
     }
-    /* Wait until the socket becomes writable */
-    if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
-      rv = -1;
-      break;
+    
+    if (tmp_iov != iov && tmp_iov != local_iov) {
+        free(tmp_iov);
     }
     }
-  }
-
-  if (tmp_iov != iov && tmp_iov != local_iov)
-    free(tmp_iov);
-
-  return rv;
-}
-
-
-int st_writev_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size,
-            st_utime_t timeout)
-{
-  ssize_t n;
-
-  while (*iov_size > 0) {
-    if (*iov_size == 1)
-      n = write(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
-    else
-      n = writev(fd->osfd, *iov, *iov_size);
-    if (n < 0) {
-      if (errno == EINTR)
-    continue;
-      if (!_IO_NOT_READY_ERROR)
-    return -1;
-    } else {
-      while ((size_t) n >= (*iov)->iov_len) {
-    n -= (*iov)->iov_len;
-    (*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
-    (*iov)->iov_len = 0;
-    (*iov)++;
-    (*iov_size)--;
-    if (n == 0)
-      break;
-      }
-      if (*iov_size == 0)
-    break;
-      (*iov)->iov_base = (char *) (*iov)->iov_base + n;
-      (*iov)->iov_len -= n;
+    
+    return rv;
+}
+
+int st_writev_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime_t timeout)
+{
+    ssize_t n;
+    
+    while (*iov_size > 0) {
+        if (*iov_size == 1) {
+            n = write(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
+        } else {
+            n = writev(fd->osfd, *iov, *iov_size);
+        }
+        if (n < 0) {
+            if (errno == EINTR) {
+                continue;
+            }
+            if (!_IO_NOT_READY_ERROR) {
+                return -1;
+            }
+        } else {
+            while ((size_t) n >= (*iov)->iov_len) {
+                n -= (*iov)->iov_len;
+                (*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
+                (*iov)->iov_len = 0;
+                (*iov)++;
+                (*iov_size)--;
+                if (n == 0) {
+                    break;
+                }
+            }
+            if (*iov_size == 0) {
+                break;
+            }
+            (*iov)->iov_base = (char *) (*iov)->iov_base + n;
+            (*iov)->iov_len -= n;
+        }
+        /* Wait until the socket becomes writable */
+        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
+            return -1;
+        }
     }
     }
-    /* Wait until the socket becomes writable */
-    if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
-      return -1;
-  }
-
-  return 0;
+    
+    return 0;
 }
 }
 
 
-
 /*
 /*
  * Simple I/O functions for UDP.
  * Simple I/O functions for UDP.
  */
  */
-int st_recvfrom(_st_netfd_t *fd, void *buf, int len, struct sockaddr *from,
-        int *fromlen, st_utime_t timeout)
-{
-  int n;
-
-  while ((n = recvfrom(fd->osfd, buf, len, 0, from, (socklen_t *)fromlen))
-     < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return -1;
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return -1;
-  }
-
-  return n;
-}
-
-
-int st_sendto(_st_netfd_t *fd, const void *msg, int len,
-          const struct sockaddr *to, int tolen, st_utime_t timeout)
-{
-  int n;
-
-  while ((n = sendto(fd->osfd, msg, len, 0, to, tolen)) < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return -1;
-    /* Wait until the socket becomes writable */
-    if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
-      return -1;
-  }
-
-  return n;
-}
-
-
-int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags,
-           st_utime_t timeout)
-{
-  int n;
-
-  while ((n = recvmsg(fd->osfd, msg, flags)) < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return -1;
-    /* Wait until the socket becomes readable */
-    if (st_netfd_poll(fd, POLLIN, timeout) < 0)
-      return -1;
-  }
-
-  return n;
-}
-
-
-int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags,
-           st_utime_t timeout)
-{
-  int n;
-
-  while ((n = sendmsg(fd->osfd, msg, flags)) < 0) {
-    if (errno == EINTR)
-      continue;
-    if (!_IO_NOT_READY_ERROR)
-      return -1;
-    /* Wait until the socket becomes writable */
-    if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
-      return -1;
-  }
-
-  return n;
+int st_recvfrom(_st_netfd_t *fd, void *buf, int len, struct sockaddr *from, int *fromlen, st_utime_t timeout)
+{
+    int n;
+    
+    while ((n = recvfrom(fd->osfd, buf, len, 0, from, (socklen_t *)fromlen)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return -1;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return -1;
+        }
+    }
+    
+    return n;
+}
+
+int st_sendto(_st_netfd_t *fd, const void *msg, int len, const struct sockaddr *to, int tolen, st_utime_t timeout)
+{
+    int n;
+    
+    while ((n = sendto(fd->osfd, msg, len, 0, to, tolen)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return -1;
+        }
+        /* Wait until the socket becomes writable */
+        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
+            return -1;
+        }
+    }
+    
+    return n;
+}
+
+
+int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags, st_utime_t timeout)
+{
+    int n;
+    
+    while ((n = recvmsg(fd->osfd, msg, flags)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return -1;
+        }
+        /* Wait until the socket becomes readable */
+        if (st_netfd_poll(fd, POLLIN, timeout) < 0) {
+            return -1;
+        }
+    }
+    
+    return n;
+}
+
+int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags, st_utime_t timeout)
+{
+    int n;
+    
+    while ((n = sendmsg(fd->osfd, msg, flags)) < 0) {
+        if (errno == EINTR) {
+            continue;
+        }
+        if (!_IO_NOT_READY_ERROR) {
+            return -1;
+        }
+        /* Wait until the socket becomes writable */
+        if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
+            return -1;
+        }
+    }
+    
+    return n;
 }
 }
 
 
-
-
 /*
 /*
  * To open FIFOs or other special files.
  * To open FIFOs or other special files.
  */
  */
 _st_netfd_t *st_open(const char *path, int oflags, mode_t mode)
 _st_netfd_t *st_open(const char *path, int oflags, mode_t mode)
 {
 {
-  int osfd, err;
-  _st_netfd_t *newfd;
-
-  while ((osfd = open(path, oflags | O_NONBLOCK, mode)) < 0) {
-    if (errno != EINTR)
-      return NULL;
-  }
-
-  newfd = _st_netfd_new(osfd, 0, 0);
-  if (!newfd) {
-    err = errno;
-    close(osfd);
-    errno = err;
-  }
-
-  return newfd;
+    int osfd, err;
+    _st_netfd_t *newfd;
+    
+    while ((osfd = open(path, oflags | O_NONBLOCK, mode)) < 0) {
+        if (errno != EINTR) {
+            return NULL;
+        }
+    }
+    
+    newfd = _st_netfd_new(osfd, 0, 0);
+    if (!newfd) {
+        err = errno;
+        close(osfd);
+        errno = err;
+    }
+    
+    return newfd;
 }
 }