src/shared/id128-print.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <stdio.h>
   4
   5 #include "sd-id128.h"
   6
   7 #include "alloc-util.h"
   8 #include "id128-print.h"
   9 #include "log.h"
  10 #include "terminal-util.h"
  11
  12 int id128_pretty_print(sd_id128_t id, bool pretty) {
  13         unsigned i;
  14         _cleanup_free_ char *man_link = NULL, *mod_link = NULL;
  15         const char *on, *off;
  16
  17         if (!pretty) {
  18                 printf(SD_ID128_FORMAT_STR "\n",
  19                        SD_ID128_FORMAT_VAL(id));
  20                 return 0;
  21         }
  22
  23         on = ansi_highlight();
  24         off = ansi_normal();
  25
  26         if (terminal_urlify("man:systemd-id128(1)", "systemd-id128(1)", &man_link) < 0)
  27                 return log_oom();
  28
  29         if (terminal_urlify("https://docs.python.org/3/library/uuid.html", "uuid", &mod_link) < 0)
  30                 return log_oom();
  31
  32         printf("As string:\n"
  33                "%s" SD_ID128_FORMAT_STR "%s\n\n"
  34                "As UUID:\n"
  35                "%s%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x%s\n\n"
  36                "As %s macro:\n"
  37                "%s#define MESSAGE_XYZ SD_ID128_MAKE(",
  38                on, SD_ID128_FORMAT_VAL(id), off,
  39                on, SD_ID128_FORMAT_VAL(id), off,
  40                man_link,
  41                on);
  42         for (i = 0; i < 16; i++)
  43                 printf("%02x%s", id.bytes[i], i != 15 ? "," : "");
  44         printf(")%s\n\n", off);
  45
  46         printf("As Python constant:\n"
  47                ">>> import %s\n"
  48                ">>> %sMESSAGE_XYZ = uuid.UUID('" SD_ID128_FORMAT_STR "')%s\n",
  49                mod_link,
  50                on, SD_ID128_FORMAT_VAL(id), off);
  51
  52         return 0;
  53 }
  54
  55 int id128_print_new(bool pretty) {
  56         sd_id128_t id;
  57         int r;
  58
  59         r = sd_id128_randomize(&id);
  60         if (r < 0)
  61                 return log_error_errno(r, "Failed to generate ID: %m");
  62
  63         return id128_pretty_print(id, pretty);
  64 }