2020-11-09 05:23:58 +01:00
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/* SPDX-License-Identifier: LGPL-2.1-or-later */
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2020-10-07 11:27:56 +02:00
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#include <getopt.h>
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#include "alloc-util.h"
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#include "pretty-print.h"
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#include "systemctl-compat-runlevel.h"
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#include "systemctl.h"
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#include "terminal-util.h"
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#include "utmp-wtmp.h"
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static int runlevel_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("runlevel", "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%sPrints the previous and current runlevel of the init system.%s\n"
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"\nOptions:\n"
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" --help Show this help\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(), 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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int runlevel_parse_argv(int argc, char *argv[]) {
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enum {
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ARG_HELP = 0x100,
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, ARG_HELP },
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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, "", options, NULL)) >= 0)
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switch (c) {
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case ARG_HELP:
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return runlevel_help();
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (optind < argc)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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"Too many arguments.");
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return 1;
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}
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int runlevel_main(void) {
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int r, runlevel, previous;
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r = utmp_get_runlevel(&runlevel, &previous);
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if (r < 0) {
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puts("unknown");
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return r;
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}
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printf("%c %c\n",
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previous <= 0 ? 'N' : previous,
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runlevel <= 0 ? 'N' : runlevel);
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return 0;
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}
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