lkml.org 
[lkml]   [2006]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: procfs uglyness caused by "cat"
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);
}
}

--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-03-14 19:02    [W:0.850 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site