Date: Sat, 10 Aug 2002 00:07:28 +0100 From: Ian Dowse <iedowse@maths.tcd.ie> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: bhlewis@wossname.net, freebsd-current@FreeBSD.ORG Subject: Re: Is anyone else having trouble with dump(8) on -current? Message-ID: <200208100007.aa02493@salmon.maths.tcd.ie> In-Reply-To: Your message of "Tue, 14 May 2002 12:34:12 %2B0200." <200205141034.g4EAYCJr024857@Magelan.Leidinger.net>
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[replying to an old message]
In message <200205141034.g4EAYCJr024857@Magelan.Leidinger.net>, Alexander Leidi
nger writes:
>On 7 Mai, Benjamin Lewis wrote:
>> | DUMP: slave couldn't reopen disk: Interrupted system call
>
>Try the attached patch. I also have a similar patch for restore. I don't
>like the patch, I think I should use SA_RESTART with sigaction(), so
>think about this patch as a proof of concept (if it solves your
>problem).
I was just looking at PR bin/18319 when I remembered this message.
Many of the changes in your patch are not necessary I believe, as
read(2) will restart after a signal by default. How about just
fixing the open call that actually triggers the reported error? I
suspect that many of the other cases are either impossible or
extremely unlikely in practice. Could someone who can reproduce the
"couldn't reopen disk" error try the following?
Ian
Index: tape.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sbin/dump/tape.c,v
retrieving revision 1.22
diff -u -r1.22 tape.c
--- tape.c 8 Jul 2002 00:29:23 -0000 1.22
+++ tape.c 9 Aug 2002 22:28:45 -0000
@@ -740,8 +740,11 @@
* Need our own seek pointer.
*/
(void) close(diskfd);
- if ((diskfd = open(disk, O_RDONLY)) < 0)
+ while ((diskfd = open(disk, O_RDONLY)) < 0) {
+ if (errno == EINTR)
+ continue;
quit("slave couldn't reopen disk: %s\n", strerror(errno));
+ }
/*
* Need the pid of the next slave in the loop...
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