battery: OS split

[slstatus.git] / components / Linux / battery.c

diff --git a/components/Linux/battery.c b/components/Linux/battery.c
new file mode 100644 (file)
index 0000000..654ddab
--- /dev/null
+++ b/components/Linux/battery.c
@@ -0,0 +1,58 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+#include <string.h>
+
+#include "../../util.h"
+
+const char *
+battery_perc(const char *bat)
+{
+       int perc;
+       char path[PATH_MAX];
+
+       snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
+       return (pscanf(path, "%i", &perc) == 1) ?
+              bprintf("%d", perc) : NULL;
+}
+
+const char *
+battery_power(const char *bat)
+{
+       int watts;
+       char path[PATH_MAX];
+
+       snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/power_now");
+       return (pscanf(path, "%i", &watts) == 1) ?
+              bprintf("%d", (watts + 500000) / 1000000) : NULL;
+}
+
+const char *
+battery_state(const char *bat)
+{
+       struct {
+               char *state;
+               char *symbol;
+       } map[] = {
+               { "Charging",    "+" },
+               { "Discharging", "-" },
+               { "Full",        "=" },
+               { "Unknown",     "/" },
+       };
+       size_t i;
+       char path[PATH_MAX], state[12];
+
+       snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/status");
+       if (pscanf(path, "%12s", state) != 1) {
+               return NULL;
+       }
+
+       for (i = 0; i < LEN(map); i++) {
+               if (!strcmp(map[i].state, state)) {
+                       break;
+               }
+       }
+       return (i == LEN(map)) ? "?" : map[i].symbol;
+}