Index wasi args_get args_sizes_get clock_res_get clock_time_get environ_get environ_sizes_get fd_advise fd_allocate fd_close fd_datasync fd_fdstat_get fd_fdstat_set_flags fd_fdstat_set_rights fd_filestat_get fd_filestat_set_size fd_filestat_set_times fd_pread fd_prestat_dir_name fd_prestat_get fd_pwrite fd_read fd_readdir fd_renumber fd_seek fd_sync fd_tell fd_write file_stat_flags filestat iovec lookup_flags path_create_directory path_filestat_get path_filestat_set_times path_link path_open path_readlink path_remove_directory path_rename path_symlink path_unlink_file poll_oneoff proc_exit proc_raise random_get sched_yield sock_accept sock_recv sock_send sock_shutdown
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Close
Close an open file descriptor.
fd_close (
fd: i32The file descriptor mapping to an open file to close.
) =>
error: i32 

The fd_close() function is used to close an open file descriptor. For sockets, this function will flush the data before closing the socket.

Note

The fd_close() function is used to close an open file descriptor. It releases any resources associated with the file descriptor.

For sockets, it is best practise to run sock_shutdown() before closing, because otherwise it can have unexpected runtime and latency side affects in some wasm runtimes.

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