Re: procfs uglyness caused by "cat"

[Paul Jackson <pj@sgi.com>]

Paul Rolland wrote:
> is funny enough...

You used the stdio routine fread - which buffers in user space.  It
does a single read, and then feeds you the characters as you ask for
them, out of its stdio buffer.

Try the following program, which doesn't buffer:

main()
{
    char c;
    int fd = open("/proc/uptime", 0);
    while (read(fd, &c, 1) == 1) {
        write(1, &c, 1);
        sleep(1);
    }
}

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                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.925.600.0401