Any further objections to this one? It's a pretty useful
patch for us.
On Mon, May 16, 2016 at 05:34:35PM +0100, Richard W.M. Jones wrote:
> QEMU compiles a list of data directories from various sources. When
> consuming a QEMU binary it's useful to be able to get this list of
> data directories: a primary reason is so you can list what BIOSes or
> keymaps ship with this version of QEMU. However without reproducing
> the method that QEMU uses internally, it's not possible to get the
> list of data directories.
>
> This commit adds a simple '-L help' option that just lists out the
> data directories as qemu calculates them:
>
> $ ./x86_64-softmmu/qemu-system-x86_64 -L help
> /home/rjones/d/qemu/pc-bios
> /usr/local/share/qemu
>
> $ ./x86_64-softmmu/qemu-system-x86_64 -L /tmp -L help
> /tmp
> /home/rjones/d/qemu/pc-bios
> /usr/local/share/qemu
>
> Signed-off-by: Richard W.M. Jones <rjo...@redhat.com>
> Reviewed-by: Eric Blake <ebl...@redhat.com>
> ---
> qemu-options.hx | 2 ++
> vl.c | 13 ++++++++++++-
> 2 files changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 6106520..bec0210 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -3199,6 +3199,8 @@ STEXI
> @item -L @var{path}
> @findex -L
> Set the directory for the BIOS, VGA BIOS and keymaps.
> +
> +To list all the data directories, use @code{-L help}.
> ETEXI
>
> DEF("bios", HAS_ARG, QEMU_OPTION_bios, \
> diff --git a/vl.c b/vl.c
> index 5fd22cb..d25f2f7 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2990,6 +2990,7 @@ int main(int argc, char **argv, char **envp)
> FILE *vmstate_dump_file = NULL;
> Error *main_loop_err = NULL;
> Error *err = NULL;
> + bool list_data_dirs = false;
>
> qemu_init_cpu_loop();
> qemu_mutex_lock_iothread();
> @@ -3371,7 +3372,9 @@ int main(int argc, char **argv, char **envp)
> add_device_config(DEV_GDB, optarg);
> break;
> case QEMU_OPTION_L:
> - if (data_dir_idx < ARRAY_SIZE(data_dir)) {
> + if (is_help_option(optarg)) {
> + list_data_dirs = true;
> + } else if (data_dir_idx < ARRAY_SIZE(data_dir)) {
> data_dir[data_dir_idx++] = optarg;
> }
> break;
> @@ -4128,6 +4131,14 @@ int main(int argc, char **argv, char **envp)
> data_dir[data_dir_idx++] = CONFIG_QEMU_DATADIR;
> }
>
> + /* -L help lists the data directories and exits. */
> + if (list_data_dirs) {
> + for (i = 0; i < data_dir_idx; i++) {
> + printf("%s\n", data_dir[i]);
> + }
> + exit(0);
> + }
> +
> smp_parse(qemu_opts_find(qemu_find_opts("smp-opts"), NULL));
>
> machine_class->max_cpus = machine_class->max_cpus ?: 1; /* Default to UP
> */
> --
> 2.7.4
>
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v
