:sig
bool file_truncate(String path, u64 size)

:params
path : file to resize
size : new length in bytes
return value : true on success

:content
Truncates (or extends) a file to exactly `size` bytes. Shrinking discards trailing bytes; growing pads with zero bytes.

:example
file_put_contents("/tmp/doc-truncate.txt", "hello world");
file_truncate("/tmp/doc-truncate.txt", 5);
print(file_get_contents("/tmp/doc-truncate.txt"), "\n");

:see
>sys
file_put_contents
file_stat