journalctl: move generate_new_id128() to shared

src/shared/id128-print.c

@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <stdio.h>
+
+#include "sd-id128.h"
+
+#include "id128-print.h"
+#include "log.h"
+
+int id128_generate_new(void) {
+        sd_id128_t id;
+        int r;
+        unsigned i;
+
+        r = sd_id128_randomize(&id);
+        if (r < 0)
+                return log_error_errno(r, "Failed to generate ID: %m");
+
+        printf("As string:\n"
+               SD_ID128_FORMAT_STR "\n\n"
+               "As UUID:\n"
+               "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n\n"
+               "As man:sd-id128(3) macro:\n"
+               "#define MESSAGE_XYZ SD_ID128_MAKE(",
+               SD_ID128_FORMAT_VAL(id),
+               SD_ID128_FORMAT_VAL(id));
+        for (i = 0; i < 16; i++)
+                printf("%02x%s", id.bytes[i], i != 15 ? "," : "");
+        fputs(")\n\n", stdout);
+
+        printf("As Python constant:\n"
+               ">>> import uuid\n"
+               ">>> MESSAGE_XYZ = uuid.UUID('" SD_ID128_FORMAT_STR "')\n",
+               SD_ID128_FORMAT_VAL(id));
+
+        return 0;
+}

src/shared/id128-print.h

@@ -0,0 +1,5 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#pragma once
+
+int id128_generate_new(void);

src/shared/meson.build

@@ -44,6 +44,8 @@ shared_sources = files('''
         generator.c
         generator.h
         gpt.h
+        id128-print.c
+        id128-print.h
         ima-util.c
         ima-util.h
         import-util.c