battery: OS split

components/OpenBSD/battery.c

@@ -0,0 +1,32 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <machine/apmvar.h>
+
+#include "../../util.h"
+
+const char *
+battery_perc(const char *null)
+{
+	struct apm_power_info apm_info;
+	int fd;
+
+	fd = open("/dev/apm", O_RDONLY);
+	if (fd < 0) {
+		fprintf(stderr, "open '/dev/apm': %s\n", strerror(errno));
+		return NULL;
+	}
+
+	if (ioctl(fd, APM_IOC_GETPOWER, &apm_info) < 0) {
+		fprintf(stderr, "ioctl 'APM_IOC_GETPOWER': %s\n", strerror(errno));
+		close(fd);
+		return NULL;
+	}
+	close(fd);
+
+	return bprintf("%d", apm_info.battery_life);
+}