adding scalability

Processes/cpu_freq.c

@@ -5,7 +5,7 @@
 #include <fcntl.h>
 #include <string.h>
 
-static const char *PIPE_TWO = "/tmp/pipeTwo";
+static const char *PIPE_TWO = "/tmp/cpu_freq";
 
 static void read_cpu_freq_and_write(int fd)
 {
@@ -25,7 +25,7 @@ static void read_cpu_freq_and_write(int fd)
         char message[128];
         snprintf(message, sizeof(message), "%.3f", freq);
 
-        ssize_t written = write(fd, message, strlen(message) + 1);
+        ssize_t written = write(fd, message, strlen(message));
         if (written < 0) {
             perror("write to pipeTwo");
         } else {

Processes/cpu_temp.c

@@ -5,7 +5,7 @@
 #include <fcntl.h>
 #include <string.h>
 
-static const char *PIPE_ONE = "/tmp/pipeOne";
+static const char *PIPE_ONE = "/tmp/cpu_temp";
 
 static void read_cpu_temp_and_write(int fd)
 {
@@ -27,7 +27,7 @@ static void read_cpu_temp_and_write(int fd)
 
         // Schreiben, aber NICHT den FD schließen.
         // Nur so viele Bytes schreiben, wie tatsächlich gebraucht werden.
-        ssize_t written = write(fd, message, strlen(message) + 1);
+        ssize_t written = write(fd, message, strlen(message));
         if (written < 0) {
             perror("write to pipeOne");
         } else {

Processes/process_monitoring.sh

 #!/bin/bash
 
+#Prozesse starten
 /usr/local/bin/cpu_temp &
 /usr/local/bin/cpu_freq &
 
+sleep 200
+
+# Gleiche Argumente in die main übergeben
+/usr/local/bin/main "$@"
+
+# Damit das Skript nicht sofort beendet, bleibst du in einer Endlosschleife
 while true
 do
     sleep 3600

main.c

@@ -60,7 +60,7 @@ void build_crc_checksum(char *package, size_t package_size) {
 
     char tmp[32];
     // z.B. " CRC=0x1A2B3C4D"
-    snprintf(tmp, sizeof(tmp), " CRC=0x%08lX", (unsigned long)c);
+    snprintf(tmp, sizeof(tmp), " CRC=0x%08lX", c);
 
     // ans package anhängen
     strncat(package, tmp, package_size - strlen(package) - 1);
@@ -70,7 +70,7 @@ void send_package(const char *package, const int fdCharDev) {
     char transmitBuf[256] = {0};
 
     // Kopiere Package in transmitBuf
-    snprintf(transmitBuf, sizeof(transmitBuf), package);
+    snprintf(transmitBuf, sizeof(transmitBuf), "%s", package);
 
     const ssize_t written = write(fdCharDev, transmitBuf, strlen(transmitBuf));
     if (written < 0) {
@@ -142,6 +142,7 @@ int main(const int argc, char *argv[]) {
                 return 1;
             }
         }
+        build_crc_checksum(package, sizeof(package));
 
         // Jetzt an /dev/packet_receiver schicken
         if (strlen(package) > 0) {

tracking.service → process-monitor.service

 [Unit]
-Description=Monitoring Processes
+Description=Monitoring Processes and sending to character device
 After=network.target
 
 [Service]
 Type=simple
-ExecStart=/usr/local/bin/process_monitoring.sh
+ExecStart=/usr/local/bin/process_monitoring.sh /tmp/cpu_temp /tmp/cpu_freq
 Restart=always
 
 [Install]