src/boot/boot-check-no-failures.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <getopt.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 #include "sd-bus.h"
   9
  10 #include "alloc-util.h"
  11 #include "bus-error.h"
  12 #include "log.h"
  13 #include "util.h"
  14
  15 static int help(void) {
  16
  17         printf("%s [COMMAND] [OPTIONS...]\n"
  18                "\n"
  19                "Verify system operational state.\n\n"
  20                "  -h --help          Show this help\n"
  21                "     --version       Print version\n",
  22                program_invocation_short_name);
  23
  24         return 0;
  25 }
  26
  27 static int parse_argv(int argc, char *argv[]) {
  28         enum {
  29                 ARG_PATH = 0x100,
  30                 ARG_VERSION,
  31         };
  32
  33         static const struct option options[] = {
  34                 { "help",         no_argument,       NULL, 'h'              },
  35                 { "version",      no_argument,       NULL, ARG_VERSION      },
  36                 {}
  37         };
  38
  39         int c;
  40
  41         assert(argc >= 0);
  42         assert(argv);
  43
  44         while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
  45                 switch (c) {
  46
  47                 case 'h':
  48                         help();
  49                         return 0;
  50
  51                 case ARG_VERSION:
  52                         return version();
  53
  54                 case '?':
  55                         return -EINVAL;
  56
  57                 default:
  58                         assert_not_reached("Unknown option");
  59                 }
  60
  61         return 1;
  62 }
  63
  64 int main(int argc, char *argv[]) {
  65         _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
  66         _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
  67         uint32_t n;
  68         int r;
  69
  70         log_parse_environment();
  71         log_open();
  72
  73         r = parse_argv(argc, argv);
  74         if (r <= 0)
  75                 goto finish;
  76
  77         r = sd_bus_open_system(&bus);
  78         if (r < 0) {
  79                 log_error_errno(r, "Failed to connect to system bus: %m");
  80                 goto finish;
  81         }
  82
  83         r = sd_bus_get_property_trivial(
  84                         bus,
  85                         "org.freedesktop.systemd1",
  86                         "/org/freedesktop/systemd1",
  87                         "org.freedesktop.systemd1.Manager",
  88                         "NFailedUnits",
  89                         &error,
  90                         'u',
  91                         &n);
  92         if (r < 0) {
  93                 log_error_errno(r, "Failed to get failed units counter: %s", bus_error_message(&error, r));
  94                 goto finish;
  95         }
  96
  97         if (n > 0)
  98                 log_notice("Health check: %" PRIu32 " units have failed.", n);
  99         else
 100                 log_info("Health check: no failed units.");
 101
 102         r = n > 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 103
 104 finish:
 105         return r < 0 ? EXIT_FAILURE : r;
 106 }