コード例 #1
0
ファイル: fs.c プロジェクト: adrienschuler/node
int uv_fs_readlink(uv_loop_t* loop, uv_fs_t* req, const char* path,
    uv_fs_cb cb) {
  ssize_t size;
  int status;
  char* buf;

  status = -1;

  uv_fs_req_init(loop, req, UV_FS_READLINK, path, cb);

  if (cb) {
    if ((req->eio = eio_readlink(path, EIO_PRI_DEFAULT, uv__fs_after, req))) {
      uv_ref(loop);
      return 0;
    } else {
      uv_err_new(loop, ENOMEM);
      return -1;
    }
  } else {
    /* pathconf(_PC_PATH_MAX) may return -1 to signify that path
     * lengths have no upper limit or aren't suitable for malloc'ing.
     */
    if ((size = pathconf(path, _PC_PATH_MAX)) == -1) {
#if defined(PATH_MAX)
      size = PATH_MAX;
#else
      size = 4096;
#endif
    }

    if ((buf = malloc(size + 1)) == NULL) {
      uv_err_new(loop, ENOMEM);
      return -1;
    }

    if ((size = readlink(path, buf, size)) == -1) {
      req->errorno = errno;
      req->result = -1;
      free(buf);
    } else {
      /* Cannot conceivably fail since it shrinks the buffer. */
      buf = realloc(buf, size + 1);
      buf[size] = '\0';
      req->result = 0;
      req->ptr = buf;
    }

    return 0;
  }

  assert(0 && "unreachable");
}
コード例 #2
0
ファイル: worker.c プロジェクト: oneoo/merry-example
void eio_test()
{
    /* avoid relative paths yourself(!) */
    printf("step: %d\n", eio_test_step);
    int s = eio_test_step++;

    switch(s) {
        case 0:
            eio_mkdir("/tmp/eio-test-dir", 0777, 0, res_cb, "mkdir");
            break;

        case 1: {
            eio_nop(0, res_cb, "nop");
        };

        break;

        case 2:
            eio_stat("/tmp/eio-test-dir", 0, stat_cb, "stat");
            break;

        case 3:
            eio_lstat("/tmp/eio-test-dir", 0, stat_cb, "stat");
            break;

        case 4:
            eio_open("/tmp/eio-test-dir/eio-test-file", O_RDWR | O_CREAT, 0777, 0, open_cb, "open");
            break;

        case 5:
            eio_symlink("test", "/tmp/eio-test-dir/eio-symlink", 0, res_cb, "symlink");
            break;

        case 6:
            eio_mknod("/tmp/eio-test-dir/eio-fifo", S_IFIFO, 0, 0, res_cb, "mknod");
            break;

        case 7:
            eio_utime("/tmp/eio-test-dir", 12345.678, 23456.789, 0, res_cb, "utime");
            break;

        case 8:
            eio_futime(last_fd, 92345.678, 93456.789, 0, res_cb, "futime");
            break;

        case 9:
            eio_chown("/tmp/eio-test-dir", getuid(), getgid(), 0, res_cb, "chown");
            break;

        case 10:
            eio_fchown(last_fd, getuid(), getgid(), 0, res_cb, "fchown");
            break;

        case 11:
            eio_fchmod(last_fd, 0723, 0, res_cb, "fchmod");
            break;

        case 12:
            eio_readdir("/tmp/eio-test-dir", 0, 0, readdir_cb, "readdir");
            break;

        case 13:
            eio_readdir("/nonexistant", 0, 0, readdir_cb, "readdir");
            break;

        case 14:
            eio_fstat(last_fd, 0, stat_cb, "stat");
            break;

        case 15: {
            eio_write(last_fd, "test\nfail\n", 10, 4, 0, res_cb, "write");
        };

        break;

        case 16:
            eio_read(last_fd, 0, 8, 0, EIO_PRI_DEFAULT, read_cb, "read");
            break;

        case 17:
            eio_readlink("/tmp/eio-test-dir/eio-symlink", 0, res_cb, "readlink");
            break;

        case 18:
            eio_dup2(1, 2, EIO_PRI_DEFAULT, res_cb, "dup");
            break;  // dup stdout to stderr

        case 19:
            eio_chmod("/tmp/eio-test-dir", 0765, 0, res_cb, "chmod");
            break;

        case 20:
            eio_ftruncate(last_fd, 9, 0, res_cb, "ftruncate");
            break;

        case 21:
            eio_fdatasync(last_fd, 0, res_cb, "fdatasync");
            break;

        case 22:
            eio_fsync(last_fd, 0, res_cb, "fsync");
            break;

        case 23:
            eio_sync(0, res_cb, "sync");
            break;

        case 24:
            eio_busy(0.5, 0, res_cb, "busy");
            break;

        case 25:
            eio_sendfile(1, last_fd, 4, 5, 0, res_cb, "sendfile");
            break;  // write "test\n" to stdout

        case 26:
            eio_fstat(last_fd, 0, stat_cb, "stat");
            break;

        case 27:
            eio_truncate("/tmp/eio-test-dir/eio-test-file", 6, 0, res_cb, "truncate");
            break;

        case 28:
            eio_readahead(last_fd, 0, 64, 0, res_cb, "readahead");
            break;

        case 29:
            eio_close(last_fd, 0, res_cb, "close");
            break;

        case 30:
            eio_link("/tmp/eio-test-dir/eio-test-file", "/tmp/eio-test-dir/eio-test-file-2", 0, res_cb, "link");
            break;

        case 31:
            eio_rename("/tmp/eio-test-dir/eio-test-file", "/tmp/eio-test-dir/eio-test-file-renamed", 0, res_cb, "rename");
            break;

        case 32:
            eio_unlink("/tmp/eio-test-dir/eio-fifo", 0, res_cb, "unlink");
            break;

        case 33:
            eio_unlink("/tmp/eio-test-dir/eio-symlink", 0, res_cb, "unlink");
            break;

        case 34:
            eio_unlink("/tmp/eio-test-dir/eio-test-file-2", 0, res_cb, "unlink");
            break;

        case 35:
            eio_unlink("/tmp/eio-test-dir/eio-test-file-renamed", 0, res_cb, "unlink");
            break;

        case 36:
            eio_rmdir("/tmp/eio-test-dir", 0, res_cb, "rmdir");
            break;
    }
}
コード例 #3
0
ファイル: demo.c プロジェクト: 337240552/node
int
main (void)
{
  printf ("pipe ()\n");
  if (pipe (respipe)) abort ();

  printf ("eio_init ()\n");
  if (eio_init (want_poll, done_poll)) abort ();

  do
    {
      /* avoid relative paths yourself(!) */
      eio_mkdir ("eio-test-dir", 0777, 0, res_cb, "mkdir");
      eio_nop (0, res_cb, "nop");
      event_loop ();

      eio_stat ("eio-test-dir", 0, stat_cb, "stat");
      eio_lstat ("eio-test-dir", 0, stat_cb, "stat");
      eio_open ("eio-test-dir/eio-test-file", O_RDWR | O_CREAT, 0777, 0, open_cb, "open");
      eio_symlink ("test", "eio-test-dir/eio-symlink", 0, res_cb, "symlink");
      eio_mknod ("eio-test-dir/eio-fifo", S_IFIFO, 0, 0, res_cb, "mknod");
      event_loop ();

      eio_utime ("eio-test-dir", 12345.678, 23456.789, 0, res_cb, "utime");
      eio_futime (last_fd, 92345.678, 93456.789, 0, res_cb, "futime");
      eio_chown ("eio-test-dir", getuid (), getgid (), 0, res_cb, "chown");
      eio_fchown (last_fd, getuid (), getgid (), 0, res_cb, "fchown");
      eio_fchmod (last_fd, 0723, 0, res_cb, "fchmod");
      eio_readdir ("eio-test-dir", 0, 0, readdir_cb, "readdir");
      eio_readdir ("/nonexistant", 0, 0, readdir_cb, "readdir");
      eio_fstat (last_fd, 0, stat_cb, "stat");
      eio_write (last_fd, "test\nfail\n", 10, 4, 0, res_cb, "write");
      event_loop ();

      eio_read (last_fd, 0, 8, 0, EIO_PRI_DEFAULT, read_cb, "read");
      eio_readlink ("eio-test-dir/eio-symlink", 0, res_cb, "readlink");
      event_loop ();

      eio_dup2 (1, 2, EIO_PRI_DEFAULT, res_cb, "dup"); // dup stdout to stderr
      eio_chmod ("eio-test-dir", 0765, 0, res_cb, "chmod");
      eio_ftruncate (last_fd, 9, 0, res_cb, "ftruncate");
      eio_fdatasync (last_fd, 0, res_cb, "fdatasync");
      eio_fsync (last_fd, 0, res_cb, "fsync");
      eio_sync (0, res_cb, "sync");
      eio_busy (0.5, 0, res_cb, "busy");
      event_loop ();

      eio_sendfile (1, last_fd, 4, 5, 0, res_cb, "sendfile"); // write "test\n" to stdout
      eio_fstat (last_fd, 0, stat_cb, "stat");
      event_loop ();

      eio_truncate ("eio-test-dir/eio-test-file", 6, 0, res_cb, "truncate");
      eio_readahead (last_fd, 0, 64, 0, res_cb, "readahead");
      event_loop ();

      eio_close (last_fd, 0, res_cb, "close");
      eio_link ("eio-test-dir/eio-test-file", "eio-test-dir/eio-test-file-2", 0, res_cb, "link");
      event_loop ();

      eio_rename ("eio-test-dir/eio-test-file", "eio-test-dir/eio-test-file-renamed", 0, res_cb, "rename");
      event_loop ();

      eio_unlink ("eio-test-dir/eio-fifo", 0, res_cb, "unlink");
      eio_unlink ("eio-test-dir/eio-symlink", 0, res_cb, "unlink");
      eio_unlink ("eio-test-dir/eio-test-file-2", 0, res_cb, "unlink");
      eio_unlink ("eio-test-dir/eio-test-file-renamed", 0, res_cb, "unlink");
      event_loop ();

      eio_rmdir ("eio-test-dir", 0, res_cb, "rmdir");
      event_loop ();
    }
  while (0);

  return 0;
}