From a1751622782eb9d3d9bfae56b75b857d8cbd0c6c Mon Sep 17 00:00:00 2001
From: Christoph Lohmann <20h@r-36.net>
Date: Sun, 10 Sep 2017 19:28:54 +0200
Subject: Initial commit.

---
 new-acpi-battery.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 new-acpi-battery.c

(limited to 'new-acpi-battery.c')

diff --git a/new-acpi-battery.c b/new-acpi-battery.c
new file mode 100644
index 0000000..cda0084
--- /dev/null
+++ b/new-acpi-battery.c
@@ -0,0 +1,55 @@
+char *
+readfile(char *base, char *file)
+{
+	char *path, line[513];
+	FILE *fd;
+
+	memset(line, 0, sizeof(line));
+
+	path = smprintf("%s/%s", base, file);
+	fd = fopen(path, "r");
+	if (fd == NULL) {
+		perror("fopen");
+		exit(1);
+	}
+	free(path);
+
+	if (fgets(line, sizeof(line)-1, fd) == NULL) {
+		perror("fgets");
+		exit(1);
+	}
+	fclose(fd);
+
+	return smprintf("%s", line);
+}
+
+char *
+getbattery(char *base)
+{
+	char *co;
+	int descap, remcap;
+
+	descap = -1;
+	remcap = -1;
+
+	co = readfile(base, "present");
+	if (co[0] != '1') {
+		free(co);
+		return smprintf("not present");
+	}
+	free(co);
+
+	co = readfile(base, "charge_full_design");
+	sscanf(co, "%d", &descap);
+	free(co);
+
+	co = readfile(base, "charge_now");
+	sscanf(co, "%d", &remcap);
+	free(co);
+
+	if (remcap < 0 || descap < 0)
+		return smprintf("invalid");
+
+	return smprintf("%.0f", ((float)remcap / (float)descap) * 100);
+}
+
-- 
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