Install and write pidfile

CMakeLists.txt

@@ -12,3 +12,4 @@ set(KERSTEZEL_SOURCES src/kerstezel.c)
 set(KERSTEZEL_HEADERS src/kerstezel.h)
 
 add_executable(kerstezel ${KERSTEZEL_SOURCES} ${KERSTEZEL_HEADERS})
+install(TARGETS kerstezel DESTINATION sbin)

src/kerstezel.c

@@ -7,8 +7,10 @@
 #include <stdio.h>
 
 #include <arpa/inet.h>
+#include <fcntl.h>
 #include <sys/prctl.h>
 #include <sys/socket.h> 
+#include <sys/stat.h>
 #include <unistd.h>
 
 #include <linux/seccomp.h>
@@ -36,6 +38,7 @@ typedef struct mbuf {
 
 } mbuf_t;
 
+const char *pid_path = "/run/kerstezel.pid";
 const char *log_path = "/var/log/kerstman.log";
 FILE *log_file = NULL;
 
@@ -196,6 +199,14 @@ int main(int argc, char *argv[]) {
 		// Kan niet loggen lol
 		exit(EXIT_FAILURE);
 	}
+
+	// WRITE PIDFILE
+	FILE *fd = fopen(pid_path, "w");
+	if (fd != NULL) {
+		fprintf(fd, "%d", getpid());
+		fclose(fd);
+	}
+
 	close(STDIN_FILENO);
 	close(STDOUT_FILENO);
 	close(STDERR_FILENO);