IO Extensions

FS

Crate features: [fs, io_extensions] https://crates.io/crates/deno_fs

Populates a large number of filesystem functions under Deno.*:
Not sandbox safe. Off by default

Full list of functions:
writeFileSync writeFile writeTextFileSync writeTextFile readTextFile readTextFileSync readFile readFileSync watchFs chmodSync chmod chown chownSync copyFileSync cwd makeTempDirSync makeTempDir makeTempFileSync makeTempFile mkdirSync mkdir chdir copyFile readDirSync readDir readLinkSync readLink realPathSync realPath removeSync remove renameSync rename statSync lstatSync stat lstat truncateSync truncate FsFile open openSync create createSync symlink symlinkSync link linkSync utime utimeSync umask

Permissions

This extension is affected by the following methods in the permissions trait:

• check_open - Check if a given path is allowed to be opened

• check_read_all - Can be used to disable all read operations
• check_read - Check if a given path is allowed to be read
• check_read_blind - check_read, but is expected to use the display argument to anonymize the path

• check_write_all - Can be used to disable all write operations
• check_write - Check if a given path is allowed to be written to
• check_write_blind - check_write, but is expected to use the display argument to anonymize the path
• check_write_partial - Used to check if a given path is allowed to be written to partially (non-recursive removes, use this)

Usage Example

const file = Deno.openSync("/dev/zero");
const buf = new Uint8Array(100);
file.readSync(buf);

const file2 = Deno.openSync("/dev/null", { write: true });
file2.writeSync(buf);