c-daemon not linked to tty

This commit is contained in:
Aliberk Sandıkçı 2023-07-26 15:29:40 +03:00
parent 7198d71d38
commit c9c795fe4e
Signed by: asandikci
GPG key ID: 25C67A03B5666BC1
3 changed files with 38 additions and 8 deletions

2
.gitignore vendored
View file

@ -77,4 +77,4 @@ Mkfile.old
dkms.conf
### USER MODIFIED ###
# c-daemon/bin/
c-daemon/bin/

View file

@ -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:

View file

@ -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);
}