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-rw-r--r--src/ac-power/ac-power.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/src/ac-power/ac-power.c b/src/ac-power/ac-power.c
new file mode 100644
index 0000000..90ba5d2
--- /dev/null
+++ b/src/ac-power/ac-power.c
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <getopt.h>
+
+#include "main-func.h"
+#include "util.h"
+
+static bool arg_verbose = false;
+
+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);
+}
+
+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();
+
+ 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)
+ return log_error_errno(r, "Failed to read AC status: %m");
+
+ if (arg_verbose)
+ puts(yes_no(r));
+
+ return r == 0;
+}
+
+DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);