Some distributions, such as centos stream 9, still have a version of
coreutils which does not yet support the %Hr and %Lr formats for stat(1)
[1, 2]. Running ublk selftests on these distributions results in the
following error in tests that use the _get_disk_dev_t helper:

line 23: ?r: syntax error: operand expected (error token is "?r")

To better accommodate older distributions, rewrite _get_disk_dev_t to
use the much older %t and %T formats for stat instead.

[1] https://github.com/coreutils/coreutils/blob/v9.0/NEWS#L114
[2] https://pkgs.org/download/coreutils

Signed-off-by: Uday Shankar <ushankar@purestorage.com>
---
 tools/testing/selftests/ublk/test_common.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/ublk/test_common.sh b/tools/testing/selftests/ublk/test_common.sh
index 9fc111f64576f91adb731d436c2d535f7dfe5c2e..a81210ca3e99d264f84260aab35827e0c00add01 100755
--- a/tools/testing/selftests/ublk/test_common.sh
+++ b/tools/testing/selftests/ublk/test_common.sh
@@ -17,8 +17,8 @@ _get_disk_dev_t() {
 	local minor
 
 	dev=/dev/ublkb"${dev_id}"
-	major=$(stat -c '%Hr' "$dev")
-	minor=$(stat -c '%Lr' "$dev")
+	major="0x"$(stat -c '%t' "$dev")
+	minor="0x"$(stat -c '%T' "$dev")
 
 	echo $(( (major & 0xfff) << 20 | (minor & 0xfffff) ))
 }

-- 
2.34.1

On Wed, Apr 23, 2025 at 03:29:03PM -0600, Uday Shankar wrote:
> Some distributions, such as centos stream 9, still have a version of
> coreutils which does not yet support the %Hr and %Lr formats for stat(1)
> [1, 2]. Running ublk selftests on these distributions results in the
> following error in tests that use the _get_disk_dev_t helper:
> 
> line 23: ?r: syntax error: operand expected (error token is "?r")
> 
> To better accommodate older distributions, rewrite _get_disk_dev_t to
> use the much older %t and %T formats for stat instead.
> 
> [1] https://github.com/coreutils/coreutils/blob/v9.0/NEWS#L114
> [2] https://pkgs.org/download/coreutils
> 
> Signed-off-by: Uday Shankar <ushankar@purestorage.com>
> ---
>  tools/testing/selftests/ublk/test_common.sh | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/testing/selftests/ublk/test_common.sh b/tools/testing/selftests/ublk/test_common.sh
> index 9fc111f64576f91adb731d436c2d535f7dfe5c2e..a81210ca3e99d264f84260aab35827e0c00add01 100755
> --- a/tools/testing/selftests/ublk/test_common.sh
> +++ b/tools/testing/selftests/ublk/test_common.sh
> @@ -17,8 +17,8 @@ _get_disk_dev_t() {
>  	local minor
>  
>  	dev=/dev/ublkb"${dev_id}"
> -	major=$(stat -c '%Hr' "$dev")
> -	minor=$(stat -c '%Lr' "$dev")
> +	major="0x"$(stat -c '%t' "$dev")
> +	minor="0x"$(stat -c '%T' "$dev")

Reviewed-by: Ming Lei <ming.lei@redhat.com>


Thanks,
Ming