End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
File#size
file.size → integer
file.c
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static VALUE
rb_file_size(VALUE obj)
{
rb_io_t *fptr;
struct stat st;
GetOpenFile(obj, fptr);
if (fptr->mode & FMODE_WRITABLE) {
rb_io_flush_raw(obj, 0);
}
if (fstat(fptr->fd, &st) == -1) {
rb_sys_fail_path(fptr->pathv);
}
return OFFT2NUM(st.st_size);
}
Returns the size of file in bytes.
Example
File.new("testfile").size #=> 66