Regarding writing to /proc entries
Robert Watson
rwatson at freebsd.org
Tue Aug 3 08:07:55 PDT 2004
On Tue, 3 Aug 2004, ravi wrote:
> The README file in /sys/fs/procfs directory says that we can send the
> control messages to note or ctl files for any process . But when we
> execute the command
>
> echo hup > /proc/curproc/note
>
> OR
> echo attach > /proc/2/ctl
It may be because you're writing the word and a line feed, and it could be
our note file doesn't know what to do with the line feed. Try "echo -n"
instead?
Robert N M Watson FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org Principal Research Scientist, McAfee Research
>
> the following error message comes on the terminal .
>
> $ echo hup > /proc/curproc/note
> /proc/curproc/note: Operation not supported
>
> and
>
> $ echo attach > /proc/2/ctl
> /proc/2/ctl: Operation not supported
>
>
>
> What is the reason for this ?
>
> Is it not possible to write the control words or control messages to the
> process entries under /proc ?
>
> Please reply to this mail .
>
> Regards,
> N Ravi
>
>
>
>
>
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