From b2d3776ce44c85a03a507aa21f3a55e3800b59b0 Mon Sep 17 00:00:00 2001
From: Federico klez Culloca <klez@klezlab.it>
Date: Sat, 13 Jun 2026 21:40:57 +0200
Subject: [PATCH] initial

---
 Makefile | 11 +++++++++++
 bat.c    | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 Makefile
 create mode 100644 bat.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..a7204f2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,11 @@
+bat : bat.c
+		cc -o bat bat.o -std=c23
+
+install : bat
+		cp bat ~/bin/bat
+
+clean :
+		rm bat
+
+check : bat.c
+		cppcheck bat.c --std=c23 --check-level=exhaustive
diff --git a/bat.c b/bat.c
new file mode 100644
index 0000000..849a897
--- /dev/null
+++ b/bat.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <limits.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <machine/apmvar.h>
+
+int main(void)
+{
+	const int apmf = open("/dev/apm", O_RDONLY);
+
+	if (apmf == -1) {
+		goto print_error;
+	}
+
+	struct apm_power_info api;
+
+	if (ioctl(apmf, APM_IOC_GETPOWER, &api) == 0) {
+		if ( close(apmf) != 0 ) {
+			goto print_error;
+		}
+
+		const char* ac_state = api.ac_state == APM_AC_OFF ? "BAT" : "AC";
+
+		printf("%s - %hhu%%"
+				, ac_state
+				, api.battery_life);
+
+		if (api.minutes_left != UINT_MAX) {
+			printf(" - %u min", api.minutes_left);
+		}
+
+        printf("\n");
+
+		return EXIT_SUCCESS;
+	}
+
+print_error:
+	fprintf(stderr, "Error: %s", strerror(errno));
+	return EXIT_FAILURE;
+}
-- 
2.47.3