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Sets the umask for the process to the mode $mode and returns the previous value.

Exceptions:

Exceptions thrown by L<Sys::IO#umask|SPVM::Sys::IO/"umask"> method could be thrown.

=head2 unlink

C<static method unlink : void ($file : string);>

Deletes a file.

In Windows, this method calls L<Sys::IO::Windows#unlink|SPVM::Sys::IO::Windows/"unlink"> method , otherwise calls L<Sys::IO#unlink|SPVM::Sys::IO/"unlink"> method.

Exceptions:

Exceptions thrown by the L<Sys::IO::Windows#unlink|SPVM::Sys::IO::Windows/"unlink"> method or L<Sys::IO#unlink|SPVM::Sys::IO/"unlink"> method could be thrown.

=head2 rename

C<static method rename : void ($old_path : string, $new_path : string);>

Raname the file name from the old name $old_path to the new name $new_path.

In Windows, this method calls L<Sys::IO::Windows#rename|SPVM::Sys::IO::Windows/"rename"> method , otherwise calls L<Sys::IO#rename|SPVM::Sys::IO/"rename"> method.

Exceptions:

Exceptions thrown by the L<Sys::IO::Windows#rename|SPVM::Sys::IO::Windows/"rename"> method or L<Sys::IO#rename|SPVM::Sys::IO/"rename"> method could be thrown.

=head2 rmdir

C<static method rmdir : void ($dir : string);>

Deletes the directory given the path $dir.

Exceptions:

Exceptions thrown by L<Sys::IO#rmdir|SPVM::Sys::IO/"rmdir"> method could be thrown.

=head2 chdir

C<static method chdir : void ($dir : string);>

Changes the working directory to the path $dir.

Exceptions:

Exceptions thrown by L<Sys::IO#chdir|SPVM::Sys::IO/"chdir"> method could be thrown.

=head2 chmod

C<static method chmod : void ($mode :int, $file : string);>

Changes the permissions of the file $file to the permission $mode.

Exceptions:

Exceptions thrown by L<Sys::IO#chmod|SPVM::Sys::IO/"chmod"> method could be thrown.

=head2 chown

C<static method chown : void ($owner : int, $group : int, $file : string);>

Changes the owner and the group of the file $file to $owner and $group.

Exceptions:

Exceptions thrown by L<Sys::IO#chown|SPVM::Sys::IO/"chown"> method could be thrown.

=head2 readlink

C<static method readlink : int ($file : string);>

Returns the content of the symbolic link file $file.

In Windows thie method calls L<Sys::IO::Windows#readlink|SPVM::Sys::IO::Windows/"readlink"> method , otherwise calls L<Sys::IO#readlink|SPVM::Sys::IO/"readlink"> method .

Exceptions:

Exceptions thrown by L<Sys::IO#readlink|SPVM::Sys::IO/"readlink"> method or L<Sys::IO::Windows#readlink|SPVM::Sys::IO::Windows/"readlink"> method could be thrown.

=head2 symlink

C<static method symlink : int ($old_path : string, $new_path : string);>

Creates a path $new_path symbolically linked to the path $old_path.

In Windows thie method calls L<Sys::IO::Windows#symlink|SPVM::Sys::IO::Windows/"symlink"> method , otherwise calls L<Sys::IO#symlink|SPVM::Sys::IO/"symlink"> method .

Exceptions:

Exceptions thrown by L<Sys::IO#symlink|SPVM::Sys::IO/"symlink"> method or L<Sys::IO::Windows#symlink|SPVM::Sys::IO::Windows/"symlink"> method could be thrown.

=head2 truncate

C<static method truncate : void ($fd : int, $legnth : long);>

Truncates the file referenced by the file descriptor $fd to a size of precisely length bytes $legnth.

Exceptions:

Exceptions thrown by L<Sys::IO#ftruncate|SPVM::Sys::IO/"ftruncate"> method could be thrown.

=head2 opendir

C<static method opendir : void ($dir_stream_ref : L<Sys::IO::DirStream|SPVM::Sys::IO::DirStream>[], $dir : string);>

Opens the directory stream given the directory $dir.

The opened directory stream is set to $dir_stream_ref at index 0.

Exceptions:

If the directory stream \$dir_stream is already closed, an exception is thrown.

This method calls L<Sys::IO#opendir|SPVM::Sys::IO/"opendir"> method.

Exceptions thrown by L<Sys::IO#opendir|SPVM::Sys::IO/"opendir"> method could be thrown.

=head2 closedir

C<static method closedir : void ($dir_stream : L<Sys::IO::DirStream|SPVM::Sys::IO::DirStream>);>

Closes the directory stream given the directory stream $dir_stream.

This method calls L<Sys::IO#closedir|SPVM::Sys::IO/"closedir"> method.

Exceptions: