From ae24bac0bc9cea34862920000a6f812ee4e47b50 Mon Sep 17 00:00:00 2001
From: Henk Kalkwater <chris@netsoj.nl>
Date: Tue, 8 Dec 2020 08:19:20 +0100
Subject: [PATCH] Install and write pidfile

---
 CMakeLists.txt  |  1 +
 src/kerstezel.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a0e6656..3c9c66d 100644
--- a/CMakeLists.txt
+++ b/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)
diff --git a/src/kerstezel.c b/src/kerstezel.c
index 7726afb..9a3e9af 100644
--- a/src/kerstezel.c
+++ b/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);