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Date: Tue, 11 Dec 2012 14:39:00 -0000
From: Pedro Alves <palves@redhat.com>
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To: Hui Zhu <teawater@gmail.com>
CC: Tom Tromey <tromey@redhat.com>,        gdb-patches ml <gdb-patches@sourceware.org>,        Hui Zhu <hui_zhu@mentor.com>
Subject: Re: [PATCH] Add fseek to ui-file
References: <CANFwon0Nv=Dk7-1kmxwjwv9zd-qoWUL18mpqH9vazRzBnkd10g@mail.gmail.com> <87txryx36w.fsf@fleche.redhat.com> <CANFwon31+VCzVWBvDLQedK0EGatd6XrRxaH1LbnHUtEKA91Ciw@mail.gmail.com> <50C1BD45.9080709@redhat.com> <CANFwon3_PB-9n9PTe-d2qTZ1Tf5GQkJnj9BWz+nMksHPGm0eZQ@mail.gmail.com> <87zk1lel8o.fsf@fleche.redhat.com> <50C70C60.6080707@redhat.com> <CANFwon0kZ-2skihq3oa8R16U=n4sQ+rsgX9mKr5eMRWGagGnSg@mail.gmail.com>
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On 12/11/2012 02:34 PM, Hui Zhu wrote:

> What about add a flag to struct stdio_file to record the error in this fd.
> When stdio_file_xxx get error, set it and throw error.
> Each stdio_file_xxx function check this flag before do syscall.  If
> this fd get error, just return.

That would allow the second caller to proceed as if no error
had happened.  That's not a good interface.

-- 
Pedro Alves