Re: [PATCH v3] util-linux: add minimal uuidgen implementation

Applied, thanks

On Sat, Jan 31, 2026 at 2:02 PM Osama Abdelkader via busybox
<[email protected]> wrote:
>
> Add a simple uuidgen utility that generates RFC 4122 compliant
> UUIDs (version 4, random). Uses the existing generate_uuid()
> function from libbb and volume_id_set_uuid() for formatting.
>
> Implementation suggested by Ulli.
>
> Features:
> - Generates standard format UUIDs: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
> - RFC 4122 version 4 compliant
> - Minimal implementation (~1.1 kb)
> - NOFORK applet for efficiency
> - Uses existing volume_id infrastructure for UUID formatting
>
> Signed-off-by: Osama Abdelkader <[email protected]>
> ---
> v3: use puts() instead of printf()
> ---
>  util-linux/uuidgen.c | 43 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
>  create mode 100644 util-linux/uuidgen.c
>
> diff --git a/util-linux/uuidgen.c b/util-linux/uuidgen.c
> new file mode 100644
> index 000000000..20e55ca7a
> --- /dev/null
> +++ b/util-linux/uuidgen.c
> @@ -0,0 +1,43 @@
> +/* vi: set sw=4 ts=4: */
> +/*
> + * Mini uuidgen implementation for busybox
> + *
> + * Licensed under GPLv2 or later, see file LICENSE in this source tree.
> + */
> +//config:config UUIDGEN
> +//config:      bool "uuidgen (1.1 kb)"
> +//config:      default y
> +//config:      help
> +//config:      Generate a UUID (Universally Unique Identifier) in RFC 4122 format.
> +
> +//applet:IF_UUIDGEN(APPLET_NOFORK(uuidgen, uuidgen, BB_DIR_USR_BIN, BB_SUID_DROP, uuidgen))
> +
> +//kbuild:lib-$(CONFIG_UUIDGEN) += uuidgen.o
> +
> +//usage:#define uuidgen_trivial_usage
> +//usage:       ""
> +//usage:#define uuidgen_full_usage "\n\n"
> +//usage:       "Generate a UUID (Universally Unique Identifier)"
> +
> +#include "libbb.h"
> +#include "volume_id/volume_id_internal.h"
> +
> +/* This is a NOFORK applet. Be very careful! */
> +
> +int uuidgen_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
> +int uuidgen_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
> +{
> +       struct volume_id id;
> +       uint8_t uuid[16];
> +
> +       if (argv[1]) {
> +               bb_show_usage();
> +       }
> +
> +       generate_uuid(uuid);
> +       volume_id_set_uuid(&id, uuid, UUID_DCE);
> +       puts(id.uuid);
> +
> +       return 0;
> +}
> +
> --
> 2.43.0
>
> _______________________________________________
> busybox mailing list
> [email protected]
> https://lists.busybox.net/mailman/listinfo/busybox
_______________________________________________
busybox mailing list
[email protected]
https://lists.busybox.net/mailman/listinfo/busybox