async_write

NAME

async_write() - appends a string to a file then executes a callback

SYNOPSIS

void async_write( string file, string str, int flag, function callback );

DESCRIPTION

Append  the string 'str' into the file 'file'. If flag is 1, write_file
overwrites instead of appending.

Unlike write_file, which returns 0 for failure or 1 for success, this efun
will return -1 for failure and 0 for success to the callback.

The callback should follow this format:

    function (int res) {
        // -1 for failure
        //  0 for success
    }

SEE ALSO

file_size(3), read_file(3), write_buffer(3), write_file(3), async_read(3),
valid_read(4), valid_write(4)