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Re: [PATCH v2] tests: Trying fixes test-replication.c on msys2.
From: |
Thomas Huth |
Subject: |
Re: [PATCH v2] tests: Trying fixes test-replication.c on msys2. |
Date: |
Sat, 5 Sep 2020 09:25:01 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 |
On 05/09/2020 05.11, 罗勇刚(Yonggang Luo) wrote:
>
>
> On Fri, Sep 4, 2020 at 9:07 PM Thomas Huth <thuth@redhat.com
> <mailto:thuth@redhat.com>> wrote:
>
> On 04/09/2020 00.06, Yonggang Luo wrote:
> > Signed-off-by: Yonggang Luo <luoyonggang@gmail.com
> <mailto:luoyonggang@gmail.com>>
> > ---
> > tests/test-replication.c | 17 +++++++++++++----
> > 1 file changed, 13 insertions(+), 4 deletions(-)
> >
> > diff --git a/tests/test-replication.c b/tests/test-replication.c
> > index 9ab3666a90..d0e06f8d77 100644
> > --- a/tests/test-replication.c
> > +++ b/tests/test-replication.c
> > @@ -23,14 +23,18 @@
> >
> > /* primary */
> > #define P_ID "primary-id"
> > -static char p_local_disk[] = "/tmp/p_local_disk.XXXXXX";
> > +#define P_LOCAL_DISK "%s/p_local_disk.XXXXXX"
> > +static char p_local_disk[PATH_MAX];
> >
> > /* secondary */
> > #define S_ID "secondary-id"
> > #define S_LOCAL_DISK_ID "secondary-local-disk-id"
> > -static char s_local_disk[] = "/tmp/s_local_disk.XXXXXX";
> > -static char s_active_disk[] = "/tmp/s_active_disk.XXXXXX";
> > -static char s_hidden_disk[] = "/tmp/s_hidden_disk.XXXXXX";
> > +#define S_LOCAL_DISK "%s/s_local_disk.XXXXXX"
> > +static char s_local_disk[PATH_MAX];
> > +#define S_ACTIVE_DISK "%s/s_active_disk.XXXXXX"
> > +static char s_active_disk[PATH_MAX];
> > +#define S_HIDDEN_DISK "%s/s_hidden_disk.XXXXXX"
> > +static char s_hidden_disk[PATH_MAX];
> >
> > /* FIXME: steal from blockdev.c */
> > QemuOptsList qemu_drive_opts = {
> > @@ -571,7 +575,12 @@ static void setup_sigabrt_handler(void)
> > int main(int argc, char **argv)
> > {
> > int ret;
> > + const char *tmpdir = g_get_tmp_dir();
> > qemu_init_main_loop(&error_fatal);
> > + sprintf(p_local_disk, P_LOCAL_DISK, tmpdir);
> > + sprintf(s_local_disk, S_LOCAL_DISK, tmpdir);
> > + sprintf(s_active_disk, S_ACTIVE_DISK, tmpdir);
> > + sprintf(s_hidden_disk, S_HIDDEN_DISK, tmpdir);
>
> Sounds like the right way to go, but I think I'd do it without the
> #defines and simply use the strings directly here, what do you think?
>
> I place them at the same place by define is for easily readable, if I
> directly place at sprintf, then the code are harder to read
IMHO it's easier to read the code the other way round: For understanding
the sprintf and its arguments, you have to know the format string, e.g.
will the "tmpdir" be handled via "%s", or "%p" or maybe something
completely different? If you then have to look up a macro first, it is a
cumbersome indirection. #defines are certainly fine for things that are
used multiple times, but here the strings are only used once, so the
indirection is really not needed.
Thomas