[Libguestfs] [PATCH] parted: add more udev_settle calls.

[Dawid Zamirski]

On Thu, 2017-03-02 at 17:44 -0500, Dawid Zamirski wrote:
> add udev_settle calls to print_partition_table and
> sgdisk_info_extract_field because the inspect-os calls
> guestfs_part_get_parttype and guestfs_part_get_gpt_guid for all
> parition devices found and this causes intermittent with opening
> block
> devices that are certainly present yet RESOLVE_DEVICE macro would
> fail
> wiht ENOENT.
> ---
>  daemon/parted.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/daemon/parted.c b/daemon/parted.c
> index 124d1e9..03e83cb 100644
> --- a/daemon/parted.c
> +++ b/daemon/parted.c
> @@ -320,6 +320,8 @@ print_partition_table (const char *device, bool
> add_m_option)
>    CLEANUP_FREE char *err = NULL;
>    int r;
>  
> +  udev_settle ();
> +
>    if (add_m_option)
>      r = command (&out, &err, str_parted, "-m", "-s", "--", device,
>                   "unit", "b",
> @@ -328,6 +330,9 @@ print_partition_table (const char *device, bool
> add_m_option)
>      r = command (&out, &err, str_parted, "-s", "--", device,
>                   "unit", "b",
>                   "print", NULL);
> +
> +  udev_settle ();
> +
>    if (r == -1) {
>      int errcode = 0;
>  
> @@ -665,6 +670,8 @@ sgdisk_info_extract_field (const char *device,
> int partnum, const char *field,
>      return NULL;
>    }
>  
> +  udev_settle ();
> +
>    CLEANUP_FREE char *err = NULL;
>    int r = commandf (NULL, &err, COMMAND_FLAG_FOLD_STDOUT_ON_STDERR,
>                      str_sgdisk, device, "-i", partnum_str, NULL);
> @@ -674,6 +681,8 @@ sgdisk_info_extract_field (const char *device,
> int partnum, const char *field,
>      return NULL;
>    }
>  
> +  udev_settle ();
> +
>    CLEANUP_FREE_STRING_LIST char **lines = split_lines (err);
>    if (lines == NULL) {
>      reply_with_error ("'%s %s -i %i' returned no output",


Just FYI, this patch is to resolve this:
https://paste.fedoraproject.org/paste/LIltC71IXO8JwHlvN~ckwl5M1UNdIGYhy
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