From c9c795fe4e8d0293fb7118f83fc82f5f83bc0fde Mon Sep 17 00:00:00 2001
From: asandikci <git@aliberksandikci.com.tr>
Date: Wed, 26 Jul 2023 15:29:40 +0300
Subject: [PATCH] c-daemon not linked to tty

---
 .gitignore               |  2 +-
 README.md                |  1 +
 c-daemon/daemon/daemon.c | 43 +++++++++++++++++++++++++++++++++-------
 3 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/.gitignore b/.gitignore
index 3fd37fa..46343b1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -77,4 +77,4 @@ Mkfile.old
 dkms.conf
 
 ### USER MODIFIED ###
-# c-daemon/bin/
\ No newline at end of file
+c-daemon/bin/
\ No newline at end of file
diff --git a/README.md b/README.md
index 5e3cc45..7651d28 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ git clone https://git.aliberksandikci.com.tr/liderahenk/go-daemon
 cd go-daemon/
 go build -o c-daemon/bin/ c-daemon/go-files/info.go
 gcc -o c-daemon/bin/test c-daemon/daemon/test.c c-daemon/daemon/daemon.c
+sudo ln -sv "$(pwd)"/c-daemon/bin/info /info
 ```
 
 How to **start** c-daemon + go processes:
diff --git a/c-daemon/daemon/daemon.c b/c-daemon/daemon/daemon.c
index dbc0a0b..4ae9ae1 100644
--- a/c-daemon/daemon/daemon.c
+++ b/c-daemon/daemon/daemon.c
@@ -8,35 +8,63 @@
 #include <linux/limits.h>
 #define NR_OPEN 1024
 
+void logg(int num){
+  printf("You are in: %d\n",num);
+}
+
 int _daemon(int nochdir, int noclose){
   pid_t pid, sid; 
   // pid_t defined in sys/types.h
   // pid_t is a signed int data type
+  
+  logg(1);
   pid = fork(); // fork of the parent process 
   // fork() function defined in unistd.h
+
+  logg(2);
+
   if (pid < 0){
+    logg(3);
     exit(EXIT_FAILURE); // exit and  EXIT_FAILURE defined in stdlib.h
   }
   else if (pid > 0){
+    logg(4);
     exit(EXIT_SUCCESS);
   } 
-  // sid = setsid();
-  // if (sid < 0) {
-  //   exit(EXIT_FAILURE);
-  // }
-  // if ((chdir("/")) < 0) {
-  //   exit(EXIT_FAILURE);
-  // }
+
+  logg(5);
+  sid = setsid();
+  logg(8);
+
+  if (sid < 0) {
+    logg(9);
+    exit(EXIT_FAILURE);
+  }
+
+  logg(10);
+
+  if ((chdir("/")) < 0) {
+    logg(11);
+    exit(EXIT_FAILURE);
+  }
+
+  // logg(11);
   // if (!noclose) {
+  //   logg(12);
   //   for (int i = 0; i < NR_OPEN; i++)
   //     close(i);
+  //   logg(13);
   //   open("/dev/null", O_RDWR);
+  //   logg(14);
   //   dup(0);
+  //   logg(15);
   //   dup(0);
+  //   logg(16);
   // }
   // close(STDOUT_FILENO);
   // close(STDERR_FILENO);
   while (1) {
+    logg(6);
     int status = system("./info");
     // TODO SECURITY ISSUE
     // LINK https://stackoverflow.com/questions/5237482/how-do-i-execute-an-external-program-within-c-code-in-linux-with-arguments#
@@ -44,5 +72,6 @@ int _daemon(int nochdir, int noclose){
 
     sleep(1);
   }
+  logg(7);
   exit(EXIT_SUCCESS);
 }
\ No newline at end of file