From 38099470b143391d28ae889c048358da8482c340 Mon Sep 17 00:00:00 2001
From: Josh Ashton <joshua.t.ashton@gmail.com>
Date: Tue, 7 Nov 2023 20:37:50 -0700
Subject: [PATCH] First iteration of the battery monitor daemon. Records date
 and time, battery percentage, and if it's charging/discharging.

---
 main.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100755 main.c

diff --git a/main.c b/main.c
new file mode 100755
index 0000000..dae01ef
--- /dev/null
+++ b/main.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <string.h>
+
+// Retrieve the current battery status
+char * getBatteryStatus() {
+    system("acpi -b > /tmp/battery.txt");
+
+    FILE *fp = fopen("/tmp/battery.txt", "r");
+    char line[256];
+
+    char* batteryStatus = NULL;
+    fgets(line, sizeof(line), fp);
+
+    // Find "discharging" or "charging" in the line
+    char* dischargingStr = strstr(line, "Discharging");
+    char* chargingStr = strstr(line, "Charging");
+
+    if (dischargingStr != NULL) batteryStatus = "Discharging";
+    else if (chargingStr != NULL) batteryStatus = "Charging";
+    else batteryStatus = "Unknown";
+
+    fclose(fp);
+
+    return batteryStatus;
+}
+
+// Retrieve the current battery percentage
+int getBatteryPercentage() {
+    system("acpi -b > /tmp/battery.txt");
+        FILE *fp = fopen("/tmp/battery.txt", "r");
+        char line[256];
+        fgets(line, sizeof(line), fp);
+        fclose(fp);
+
+        char *token = strtok(line, ",");
+        token = strtok(NULL, ",");
+        char *percentage = strtok(token, "%");
+
+    return atoi(percentage);
+}
+
+// Record the current date, time, and battery percentage
+void recordData() {
+    time_t now;
+    struct tm *tm_info;
+    time(&now);
+    tm_info = localtime(&now);
+
+    int batteryPercentage = getBatteryPercentage();
+    char * batteryStatus = getBatteryStatus();
+
+    // Create a string for date and time
+    char datetime[50];
+    strftime(datetime, sizeof(datetime), "%Y-%m-%d %H:%M:%S", tm_info);
+
+    // Write the data to a file
+    FILE *fp = fopen("/tmp/data.txt", "a");
+    fprintf(fp, "%s, %d, %s\n", datetime, batteryPercentage, batteryStatus);
+    fclose(fp);
+}
+
+int main() {
+    // Daemonize the process
+    pid_t pid, sid;
+    pid = fork();
+    if (pid < 0) exit(EXIT_FAILURE);
+    if (pid > 0) exit(EXIT_SUCCESS);
+
+    sid = setsid();
+
+    if (sid < 0) exit(EXIT_FAILURE);
+    if ((chdir("/")) < 0) exit(EXIT_FAILURE);
+
+    while (1) {
+        recordData();
+
+        // Sleep for 10 seconds
+        sleep(60);
+    }
+
+    return 0;
+}