bin/155034: [PATCH] dd(1) dies on SIGUSR1; should print info
vadim_nuclight at mail.ru
Wed Jun 29 10:00:13 UTC 2011
Hi jh at FreeBSD.org!
On Mon, 6 Jun 2011 18:20:50 GMT; jh at FreeBSD.org wrote about 'Re: bin/155034: [PATCH] dd(1) dies on SIGUSR1; should print info':
> Synopsis: [PATCH] dd(1) dies on SIGUSR1; should print info
> State-Changed-From-To: open->closed
> State-Changed-By: jh
> State-Changed-When: Mon Jun 6 18:04:17 UTC 2011
> Not a bug. As far as I can see ignoring the signal would violate POSIX:
> "For SIGINT, the dd utility shall interrupt its current processing,
> write status information to standard error, and exit as though
> terminated by SIGINT. It shall take the standard action for all other
> signals; - -"
The originator requested compatibilty shim with Linux dd, in fact:
Sending an `INFO' signal to a running `dd' process makes it print
I/O statistics to standard error and then resume copying.
On systems lacking the `INFO' signal `dd' responds to the `USR1'
signal instead, unless the `POSIXLY_CORRECT' environment variable is
WBR, Vadim Goncharov. ICQ#166852181 mailto:vadim_nuclight at mail.ru
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