method

syswrite

v2_1_10 - Show latest stable - Class: IO

syswrite(p1)

public

Writes the given string to ios using a low-level write. Returns the number of bytes written. Do not mix with other methods that write to ios or you may get unpredictable results. Raises SystemCallError on error.

f = File.new("out", "w")
f.syswrite("ABCDEF")   #=> 6

static VALUE
rb_io_syswrite(VALUE io, VALUE str)
{
    rb_io_t *fptr;
    long n;

    if (!RB_TYPE_P(str, T_STRING))
        str = rb_obj_as_string(str);

    io = GetWriteIO(io);
    GetOpenFile(io, fptr);
    rb_io_check_writable(fptr);

    str = rb_str_new_frozen(str);

    if (fptr->wbuf.len) {
        rb_warn("syswrite for buffered IO");
    }

    n = rb_write_internal(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str));
    RB_GC_GUARD(str);

    if (n == -1) rb_sys_fail_path(fptr->pathv);

    return LONG2FIX(n);
}

syswrite

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