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Re: [Qemu-devel] [PATCH v2 0/4] initialize progname with error_set_progn
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-devel] [PATCH v2 0/4] initialize progname with error_set_progname() |
Date: |
Thu, 22 Jan 2015 10:47:58 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
Hitoshi Mitake <address@hidden> writes:
> In the context of some subcommands of QEMU, error_get_progname() can
> be used for obtaining argv[0]. The function is useful for the commands
> because it is possible to detect a name of executable file and switch
> behavior based on the function like busybox. e.g. block drivers can
> switch behavior based on the name (qemu itself, qemu-img, or qemu-io).
Changing behavior based on argv[0] is usually a bad idea.
Current use of error_get_progname() is limited to error messages and
such. That's a good idea.
> But calling error_get_progname() in some commands causes segmentation
> fault because initialization, calling error_set_progname(), isn't
> done. This patchset adds the initialization to the commands which
> lacks it but linked to util/qemu-error.o (one exception is bsd-user, because I
> don't have an environment which can build and test it).
>
> Currently, the missing call of error_set_progname() doesn't cause any
> problems because the changed commands don't use error_get_progname(). This
> patchset is a proactive action (but sheepdog driver will use it soon).
I'm fine with calling error_set_progname() in all programs linking with
qemu-error.c.
I'm reserving judgement on its use in block drivers. Please cc me on
that patch.
Series
Reviewed-by: Markus Armbruster <address@hidden>