[libvirt] [PATCH 1/3] virsh: Improve error message on integer value parsing failure.

[Michal Privoznik]

On 15.05.2015 18:14, Andrea Bolognani wrote:
> Replace more than 30 ad-hoc error messages with a single, generic one
> that contains the name of the option being processed and some hints
> to help the user understand what could have gone wrong.
> 
> Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1207043
> ---
>  tests/vcpupin                |   4 +-
>  tools/virsh-domain-monitor.c |  10 +++--
>  tools/virsh-domain.c         | 102 ++++++++++++++++++++++++++++++++-----------
>  tools/virsh-host.c           |  44 ++++++++++++++-----
>  tools/virsh-interface.c      |   4 +-
>  tools/virsh-network.c        |   4 +-
>  tools/virsh-volume.c         |  16 +++++--
>  7 files changed, 135 insertions(+), 49 deletions(-)
> 
> diff --git a/tests/vcpupin b/tests/vcpupin
> index cd09145..ab0d38f 100755
> --- a/tests/vcpupin
> +++ b/tests/vcpupin
> @@ -34,7 +34,7 @@ fail=0
>  $abs_top_builddir/tools/virsh --connect test:///default vcpupin test a 0,1 > out 2>&1
>  test $? = 1 || fail=1
>  cat <<\EOF > exp || fail=1
> -error: vcpupin: Invalid vCPU number.
> +error: Numeric value for <vcpu> option is malformed or out of range
>  
>  EOF
>  compare exp out || fail=1
> @@ -52,7 +52,7 @@ compare exp out || fail=1
>  $abs_top_builddir/tools/virsh --connect test:///default vcpupin test -100 0,1 > out 2>&1
>  test $? = 1 || fail=1
>  cat <<\EOF > exp || fail=1
> -error: vcpupin: Invalid vCPU number.
> +error: Numeric value for <vcpu> option is malformed or out of range
>  
>  EOF
>  compare exp out || fail=1
> diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c
> index 91c57e2..51276d3 100644
> --- a/tools/virsh-domain-monitor.c
> +++ b/tools/virsh-domain-monitor.c
> @@ -341,8 +341,9 @@ cmdDomMemStat(vshControl *ctl, const vshCmd *cmd)
>       * This is not really an unsigned long, but it
>       */
>      if ((rv = vshCommandOptInt(cmd, "period", &period)) < 0) {
> -        vshError(ctl, "%s",
> -                 _("Unable to parse integer parameter."));
> +        vshError(ctl,
> +                 _("Numeric value for <%s> option is malformed or out of range"),
> +                 "period");

I wonder if we can make all vshCommandOpt*() throw an error now that we
have a generic error message. For all the places where no error is
reported - we can invent vshCommandOpt*Quiet(). Just follow the same
pattern we have for virAsprintf().

Michal