---
title: Wasi
---

## Values

Functions and constants included in the Wasi module.

### Wasi.**args_get**

```grain
args_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**args_sizes_get**

```grain
args_sizes_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**environ_get**

```grain
environ_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**environ_sizes_get**

```grain
environ_sizes_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**proc_exit**

```grain
proc_exit: WasmI32 => Void
```

### Wasi.**proc_raise**

```grain
proc_raise: WasmI32 => WasmI32
```

### Wasi.**sched_yield**

```grain
sched_yield: () => WasmI32
```

### Wasi.**random_get**

```grain
random_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**clock_time_get**

```grain
clock_time_get: (WasmI32, WasmI64, WasmI32) => WasmI32
```

### Wasi.**path_open**

```grain
path_open:
  (WasmI32, WasmI32, WasmI32, WasmI32, WasmI32, WasmI64, WasmI64, WasmI32,
   WasmI32) => WasmI32
```

### Wasi.**fd_read**

```grain
fd_read: (WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_pread**

```grain
fd_pread: (WasmI32, WasmI32, WasmI32, WasmI64, WasmI32) => WasmI32
```

### Wasi.**fd_prestat_get**

```grain
fd_prestat_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_prestat_dir_name**

```grain
fd_prestat_dir_name: (WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_write**

```grain
fd_write: (WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

Invokes the `fd_write` system call.

Parameters:

| param | type      | description                                |
| ----- | --------- | ------------------------------------------ |
| `0`   | `WasmI32` | The file descriptor to write to            |
| `1`   | `WasmI32` | The pointer to the array of iovs to write  |
| `2`   | `WasmI32` | The length of the array of iovs            |
| `3`   | `WasmI32` | Where to store the number of bytes written |

Returns:

| type      | description                 |
| --------- | --------------------------- |
| `WasmI32` | The number of bytes written |

### Wasi.**fd_pwrite**

```grain
fd_pwrite: (WasmI32, WasmI32, WasmI32, WasmI64, WasmI32) => WasmI32
```

### Wasi.**fd_allocate**

```grain
fd_allocate: (WasmI32, WasmI64, WasmI64) => WasmI32
```

### Wasi.**fd_close**

```grain
fd_close: WasmI32 => WasmI32
```

### Wasi.**fd_datasync**

```grain
fd_datasync: WasmI32 => WasmI32
```

### Wasi.**fd_sync**

```grain
fd_sync: WasmI32 => WasmI32
```

### Wasi.**fd_fdstat_get**

```grain
fd_fdstat_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_fdstat_set_flags**

```grain
fd_fdstat_set_flags: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_fdstat_set_rights**

```grain
fd_fdstat_set_rights: (WasmI32, WasmI64, WasmI64) => WasmI32
```

### Wasi.**fd_filestat_get**

```grain
fd_filestat_get: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_filestat_set_size**

```grain
fd_filestat_set_size: (WasmI32, WasmI64) => WasmI32
```

### Wasi.**fd_filestat_set_times**

```grain
fd_filestat_set_times: (WasmI32, WasmI64, WasmI64, WasmI32) => WasmI32
```

### Wasi.**fd_readdir**

```grain
fd_readdir: (WasmI32, WasmI32, WasmI32, WasmI64, WasmI32) => WasmI32
```

### Wasi.**fd_renumber**

```grain
fd_renumber: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_seek**

```grain
fd_seek: (WasmI32, WasmI64, WasmI32, WasmI32) => WasmI32
```

### Wasi.**fd_tell**

```grain
fd_tell: (WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_create_directory**

```grain
path_create_directory: (WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_filestat_get**

```grain
path_filestat_get: (WasmI32, WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_filestat_set_times**

```grain
path_filestat_set_times:
  (WasmI32, WasmI32, WasmI32, WasmI32, WasmI64, WasmI64, WasmI32) => WasmI32
```

### Wasi.**path_link**

```grain
path_link:
  (WasmI32, WasmI32, WasmI32, WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_symlink**

```grain
path_symlink: (WasmI32, WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_unlink_file**

```grain
path_unlink_file: (WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_readlink**

```grain
path_readlink:
  (WasmI32, WasmI32, WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_remove_directory**

```grain
path_remove_directory: (WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**path_rename**

```grain
path_rename:
  (WasmI32, WasmI32, WasmI32, WasmI32, WasmI32, WasmI32) => WasmI32
```

### Wasi.**_CLOCK_REALTIME**

```grain
_CLOCK_REALTIME: WasmI32
```

### Wasi.**_CLOCK_MONOTONIC**

```grain
_CLOCK_MONOTONIC: WasmI32
```

### Wasi.**_CLOCK_PROCESS_CPUTIME**

```grain
_CLOCK_PROCESS_CPUTIME: WasmI32
```

### Wasi.**_CLOCK_THREAD_CPUTIME**

```grain
_CLOCK_THREAD_CPUTIME: WasmI32
```

### Wasi.**_TIME_SET_ATIM**

```grain
_TIME_SET_ATIM: WasmI32
```

### Wasi.**_TIME_SET_ATIM_NOW**

```grain
_TIME_SET_ATIM_NOW: WasmI32
```

### Wasi.**_TIME_SET_MTIM**

```grain
_TIME_SET_MTIM: WasmI32
```

### Wasi.**_TIME_SET_MTIM_NOW**

```grain
_TIME_SET_MTIM_NOW: WasmI32
```

### Wasi.**_LOOKUP_FLAG_SYMLINK_FOLLOW**

```grain
_LOOKUP_FLAG_SYMLINK_FOLLOW: WasmI32
```

### Wasi.**_OPEN_FLAG_CREAT**

```grain
_OPEN_FLAG_CREAT: WasmI32
```

### Wasi.**_OPEN_FLAG_DIRECTORY**

```grain
_OPEN_FLAG_DIRECTORY: WasmI32
```

### Wasi.**_OPEN_FLAG_EXCL**

```grain
_OPEN_FLAG_EXCL: WasmI32
```

### Wasi.**_OPEN_FLAG_TRUNC**

```grain
_OPEN_FLAG_TRUNC: WasmI32
```

### Wasi.**_FDFLAG_APPEND**

```grain
_FDFLAG_APPEND: WasmI32
```

### Wasi.**_FDFLAG_DSYNC**

```grain
_FDFLAG_DSYNC: WasmI32
```

### Wasi.**_FDFLAG_NONBLOCK**

```grain
_FDFLAG_NONBLOCK: WasmI32
```

### Wasi.**_FDFLAG_RSYNC**

```grain
_FDFLAG_RSYNC: WasmI32
```

### Wasi.**_FDFLAG_SYNC**

```grain
_FDFLAG_SYNC: WasmI32
```

### Wasi.**_WHENCE_SET**

```grain
_WHENCE_SET: WasmI32
```

### Wasi.**_WHENCE_CUR**

```grain
_WHENCE_CUR: WasmI32
```

### Wasi.**_WHENCE_END**

```grain
_WHENCE_END: WasmI32
```

### Wasi.**_ESUCCESS**

```grain
_ESUCCESS: WasmI32
```

### Wasi.**_ETOOBIG**

```grain
_ETOOBIG: WasmI32
```

### Wasi.**_EACCES**

```grain
_EACCES: WasmI32
```

### Wasi.**_EADDRINUSE**

```grain
_EADDRINUSE: WasmI32
```

### Wasi.**_EADDRNOTAVAIL**

```grain
_EADDRNOTAVAIL: WasmI32
```

### Wasi.**_EAFNOSUPPORT**

```grain
_EAFNOSUPPORT: WasmI32
```

### Wasi.**_EAGAIN**

```grain
_EAGAIN: WasmI32
```

### Wasi.**_EALREADY**

```grain
_EALREADY: WasmI32
```

### Wasi.**_EBADF**

```grain
_EBADF: WasmI32
```

### Wasi.**_EBADMSG**

```grain
_EBADMSG: WasmI32
```

### Wasi.**_EBUSY**

```grain
_EBUSY: WasmI32
```

### Wasi.**_ECANCELED**

```grain
_ECANCELED: WasmI32
```

### Wasi.**_ECHILD**

```grain
_ECHILD: WasmI32
```

### Wasi.**_ECONNABORTED**

```grain
_ECONNABORTED: WasmI32
```

### Wasi.**_ECONNREFUSED**

```grain
_ECONNREFUSED: WasmI32
```

### Wasi.**_ECONNRESET**

```grain
_ECONNRESET: WasmI32
```

### Wasi.**_EDEADLK**

```grain
_EDEADLK: WasmI32
```

### Wasi.**_EDESTADDRREQ**

```grain
_EDESTADDRREQ: WasmI32
```

### Wasi.**_EDOM**

```grain
_EDOM: WasmI32
```

### Wasi.**_EDQUOT**

```grain
_EDQUOT: WasmI32
```

### Wasi.**_EEXIST**

```grain
_EEXIST: WasmI32
```

### Wasi.**_EFAULT**

```grain
_EFAULT: WasmI32
```

### Wasi.**_EFBIG**

```grain
_EFBIG: WasmI32
```

### Wasi.**_EHOSTUNREACH**

```grain
_EHOSTUNREACH: WasmI32
```

### Wasi.**_EIDRM**

```grain
_EIDRM: WasmI32
```

### Wasi.**_EILSEQ**

```grain
_EILSEQ: WasmI32
```

### Wasi.**_EINPROGRESS**

```grain
_EINPROGRESS: WasmI32
```

### Wasi.**_EINTR**

```grain
_EINTR: WasmI32
```

### Wasi.**_EINVAL**

```grain
_EINVAL: WasmI32
```

### Wasi.**_EIO**

```grain
_EIO: WasmI32
```

### Wasi.**_EISCONN**

```grain
_EISCONN: WasmI32
```

### Wasi.**_EISDIR**

```grain
_EISDIR: WasmI32
```

### Wasi.**_ELOOP**

```grain
_ELOOP: WasmI32
```

### Wasi.**_EMFILE**

```grain
_EMFILE: WasmI32
```

### Wasi.**_EMLINK**

```grain
_EMLINK: WasmI32
```

### Wasi.**_EMSGSIZE**

```grain
_EMSGSIZE: WasmI32
```

### Wasi.**_EMULTIHOP**

```grain
_EMULTIHOP: WasmI32
```

### Wasi.**_ENAMETOOLONG**

```grain
_ENAMETOOLONG: WasmI32
```

### Wasi.**_ENETDOWN**

```grain
_ENETDOWN: WasmI32
```

### Wasi.**_ENETRESET**

```grain
_ENETRESET: WasmI32
```

### Wasi.**_ENETUNREACH**

```grain
_ENETUNREACH: WasmI32
```

### Wasi.**_ENFILE**

```grain
_ENFILE: WasmI32
```

### Wasi.**_ENOBUFS**

```grain
_ENOBUFS: WasmI32
```

### Wasi.**_ENODEV**

```grain
_ENODEV: WasmI32
```

### Wasi.**_ENOENT**

```grain
_ENOENT: WasmI32
```

### Wasi.**_ENOEXEC**

```grain
_ENOEXEC: WasmI32
```

### Wasi.**_ENOLCK**

```grain
_ENOLCK: WasmI32
```

### Wasi.**_ENOLINK**

```grain
_ENOLINK: WasmI32
```

### Wasi.**_ENOMEM**

```grain
_ENOMEM: WasmI32
```

### Wasi.**_ENOMSG**

```grain
_ENOMSG: WasmI32
```

### Wasi.**_ENOPROTOOPT**

```grain
_ENOPROTOOPT: WasmI32
```

### Wasi.**_ENOSPC**

```grain
_ENOSPC: WasmI32
```

### Wasi.**_ENOSYS**

```grain
_ENOSYS: WasmI32
```

### Wasi.**_ENOTCONN**

```grain
_ENOTCONN: WasmI32
```

### Wasi.**_ENOTDIR**

```grain
_ENOTDIR: WasmI32
```

### Wasi.**_ENOTEMPTY**

```grain
_ENOTEMPTY: WasmI32
```

### Wasi.**_ENOTRECOVERABLE**

```grain
_ENOTRECOVERABLE: WasmI32
```

### Wasi.**_ENOTSOCK**

```grain
_ENOTSOCK: WasmI32
```

### Wasi.**_ENOTSUP**

```grain
_ENOTSUP: WasmI32
```

### Wasi.**_ENOTTY**

```grain
_ENOTTY: WasmI32
```

### Wasi.**_ENXIO**

```grain
_ENXIO: WasmI32
```

### Wasi.**_EOVERFLOW**

```grain
_EOVERFLOW: WasmI32
```

### Wasi.**_EOWNERDEAD**

```grain
_EOWNERDEAD: WasmI32
```

### Wasi.**_EPERM**

```grain
_EPERM: WasmI32
```

### Wasi.**_EPIPE**

```grain
_EPIPE: WasmI32
```

### Wasi.**_EPROTO**

```grain
_EPROTO: WasmI32
```

### Wasi.**_EPROTONOSUPPORT**

```grain
_EPROTONOSUPPORT: WasmI32
```

### Wasi.**_EPROTOTYPE**

```grain
_EPROTOTYPE: WasmI32
```

### Wasi.**_ERANGE**

```grain
_ERANGE: WasmI32
```

### Wasi.**_EROFS**

```grain
_EROFS: WasmI32
```

### Wasi.**_ESPIPE**

```grain
_ESPIPE: WasmI32
```

### Wasi.**_ESRCH**

```grain
_ESRCH: WasmI32
```

### Wasi.**_ESTALE**

```grain
_ESTALE: WasmI32
```

### Wasi.**_ETIMEDOUT**

```grain
_ETIMEDOUT: WasmI32
```

### Wasi.**_ETXTBSY**

```grain
_ETXTBSY: WasmI32
```

### Wasi.**_EXDEV**

```grain
_EXDEV: WasmI32
```

### Wasi.**_ENOTCAPABLE**

```grain
_ENOTCAPABLE: WasmI32
```

### Wasi.**stringOfSystemError**

```grain
stringOfSystemError: (code: Number) => String
```