Merge pull request #17549 from yuwata/tiny-fixes

[thirdparty/systemd.git] / src / ac-power / ac-power.c

diff --git a/src/ac-power/ac-power.c b/src/ac-power/ac-power.c
index c5277884a805d8d30f46c1ab67011db9db25f72d..9fabdb9e9f1d690adb4915a69f086cb3eb09867f 100644 (file)
--- a/src/ac-power/ac-power.c
+++ b/src/ac-power/ac-power.c
@@ -1,35 +1,90 @@
-/***
-  This file is part of systemd.
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
 
-  Copyright 2010 Lennart Poettering
+#include <getopt.h>
 
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
+#include "main-func.h"
+#include "util.h"
 
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
+static bool arg_verbose = false;
 
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
+static void help(void) {
+        printf("%s\n\n"
+               "Report whether we are connected to an external power source.\n\n"
+               "  -h --help             Show this help\n"
+               "     --version          Show package version\n"
+               "  -v --verbose          Show state as text\n"
+               , program_invocation_short_name);
+}
 
-#include "util.h"
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+        };
+
+        static const struct option options[] = {
+                { "help",    no_argument, NULL, 'h'         },
+                { "version", no_argument, NULL, ARG_VERSION },
+                { "verbose", no_argument, NULL, 'v'         },
+                {}
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "hv", options, NULL)) >= 0)
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        return version();
 
-int main(int argc, char *argv[]) {
+                case 'v':
+                        arg_verbose = true;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        if (optind < argc)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "%s takes no arguments.",
+                                       program_invocation_short_name);
+
+        return 1;
+}
+
+static int run(int argc, char *argv[]) {
         int r;
 
         /* This is mostly intended to be used for scripts which want
          * to detect whether AC power is plugged in or not. */
 
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                return r;
+
         r = on_ac_power();
-        if (r < 0) {
-                log_error_errno(r, "Failed to read AC status: %m");
-                return EXIT_FAILURE;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to read AC status: %m");
 
-        return r != 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+        if (arg_verbose)
+                puts(yes_no(r));
+
+        return r == 0;
 }
+
+DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);