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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include "sd-bus.h"
#include "alloc-util.h"
#include "bus-error.h"
#include "log.h"
#include "main-func.h"
#include "util.h"
static int help(void) {
printf("%s [COMMAND] [OPTIONS...]\n"
"\n"
"Verify system operational state.\n\n"
" -h --help Show this help\n"
" --version Print version\n",
program_invocation_short_name);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_PATH = 0x100,
ARG_VERSION,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{}
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
help();
return 0;
case ARG_VERSION:
return version();
case '?':
return -EINVAL;
default:
assert_not_reached("Unknown option");
}
return 1;
}
static int run(int argc, char *argv[]) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
uint32_t n;
int r;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
r = sd_bus_open_system(&bus);
if (r < 0)
return log_error_errno(r, "Failed to connect to system bus: %m");
r = sd_bus_get_property_trivial(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"NFailedUnits",
&error,
'u',
&n);
if (r < 0)
return log_error_errno(r, "Failed to get failed units counter: %s", bus_error_message(&error, r));
if (n > 0)
log_notice("Health check: %" PRIu32 " units have failed.", n);
else
log_info("Health check: no failed units.");
return n > 0;
}
DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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