353b2baa20
This cleans up and unifies the outut of --help texts a bit:
1. Highlight the human friendly description string, not the command
line via ANSI sequences. Previously both this description string and
the brief command line summary was marked with the same ANSI
highlight sequence, but given we auto-page to less and less does not
honour multi-line highlights only the command line summary was
affectively highlighted. Rationale: for highlighting the description
instead of the command line: the command line summary is relatively
boring, and mostly the same for out tools, the description on the
other hand is pregnant, important and captions the whole thing and
hence deserves highlighting.
2. Always suffix "Options" with ":" in the help text
3. Rename "Flags" → "Options" in one case
4. Move commands to the top in a few cases
5. add coloring to many more help pages
6. Unify on COMMAND instead of {COMMAND} in the command line summary.
Some tools did it one way, others the other way. I am not sure what
precisely {} is supposed to mean, that uppercasing doesn't, hence
let's simplify and stick to the {}-less syntax
And minor other tweaks.
115 lines
3 KiB
C
115 lines
3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "sd-bus.h"
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#include "alloc-util.h"
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#include "bus-error.h"
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#include "log.h"
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#include "main-func.h"
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#include "pretty-print.h"
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#include "terminal-util.h"
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#include "util.h"
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static int help(void) {
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_cleanup_free_ char *link = NULL;
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int r;
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r = terminal_urlify_man("systemd-boot-check-no-failures.service", "8", &link);
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if (r < 0)
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return log_oom();
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printf("%s [OPTIONS...]\n"
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"\n%sVerify system operational state.%s\n\n"
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" -h --help Show this help\n"
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" --version Print version\n"
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"\nSee the %s for details.\n"
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, program_invocation_short_name
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, ansi_highlight()
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, ansi_normal()
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, link
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);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_PATH = 0x100,
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ARG_VERSION,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{}
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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return version();
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unknown option");
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}
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return 1;
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}
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static int run(int argc, char *argv[]) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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uint32_t n;
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int r;
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log_parse_environment();
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log_open();
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r = parse_argv(argc, argv);
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if (r <= 0)
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return r;
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r = sd_bus_open_system(&bus);
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if (r < 0)
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return log_error_errno(r, "Failed to connect to system bus: %m");
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r = sd_bus_get_property_trivial(
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bus,
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"org.freedesktop.systemd1",
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"/org/freedesktop/systemd1",
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"org.freedesktop.systemd1.Manager",
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"NFailedUnits",
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&error,
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'u',
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&n);
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if (r < 0)
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return log_error_errno(r, "Failed to get failed units counter: %s", bus_error_message(&error, r));
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if (n > 0)
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log_notice("Health check: %" PRIu32 " units have failed.", n);
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else
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log_info("Health check: no failed units.");
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return n > 0;
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}
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DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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