a running minimal c-daemon ready
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6 changed files with 77 additions and 29 deletions
5
.gitignore
vendored
5
.gitignore
vendored
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@ -74,4 +74,7 @@ go.work
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modules.order
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modules.order
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Module.symvers
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Module.symvers
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Mkfile.old
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Mkfile.old
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dkms.conf
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dkms.conf
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### USER MODIFIED ###
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c-daemon/bin/
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23
README.md
23
README.md
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@ -9,6 +9,25 @@ This repo will be include two separate daemons. One of them is written with C la
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<br>
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<br>
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How to start c-daemon + go processes:
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```bash
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git clone https://git.aliberksandikci.com.tr/liderahenk/go-daemon
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cd go-daemon/
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go build -o c-daemon/bin/ info
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gcc -o c-daemon/bin/test c-daemon/daemon/test.c c-daemon/daemon/daem
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on.c
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./c-daemon/bin/test
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```
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<br>
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---
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<br>
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<details><summary>Notes</summary>
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### Summary - [MakeUseOf](https://www.makeuseof.com/create-daemons-on-linux/)
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### Summary - [MakeUseOf](https://www.makeuseof.com/create-daemons-on-linux/)
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@ -64,4 +83,6 @@ Now return to the terminal where you are running your application (./test) and p
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First of all, you can say that the new subprocess is running in the **background** since you do not see the **+** character in the **STAT** field. You can now see that the parent process of your process is the systemd process (or other init in use)
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First of all, you can say that the new subprocess is running in the **background** since you do not see the **+** character in the **STAT** field. You can now see that the parent process of your process is the systemd process (or other init in use)
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I'm too lazy to continue this readme(about c-daemon). just continue in [original website](https://www.makeuseof.com/create-daemons-on-linux/) or just review last versions of c files
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I'm too lazy to continue this readme(about c-daemon). just continue in [original website](https://www.makeuseof.com/create-daemons-on-linux/) or just review last versions of c files
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</detailsc>
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@ -1,27 +0,0 @@
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/fs.h>
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#include <linux/limits.h>
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int _daemon(int nochdir, int noclose){
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pid_t pid;
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// pid_t defined in sys/types.h
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// pid_t is a signed int data type
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pid = fork(); // fork of the parent process
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// fork() function defined in unistd.h
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if (pid < 0){
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exit(EXIT_FAILURE); // exit and EXIT_FAILURE defined in stdlib.h
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}
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else if (pid > 0){
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exit(EXIT_SUCCESS);
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}
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if (setsid() == -1){
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return -1;
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}
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return 0;
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}
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48
c-daemon/daemon/daemon.c
Normal file
48
c-daemon/daemon/daemon.c
Normal file
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@ -0,0 +1,48 @@
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/fs.h>
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#include <linux/limits.h>
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#define NR_OPEN 1024
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int _daemon(int nochdir, int noclose){
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pid_t pid, sid;
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// pid_t defined in sys/types.h
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// pid_t is a signed int data type
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pid = fork(); // fork of the parent process
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// fork() function defined in unistd.h
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if (pid < 0){
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exit(EXIT_FAILURE); // exit and EXIT_FAILURE defined in stdlib.h
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}
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else if (pid > 0){
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exit(EXIT_SUCCESS);
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}
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// sid = setsid();
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// if (sid < 0) {
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// exit(EXIT_FAILURE);
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// }
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// if ((chdir("/")) < 0) {
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// exit(EXIT_FAILURE);
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// }
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// if (!noclose) {
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// for (int i = 0; i < NR_OPEN; i++)
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// close(i);
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// open("/dev/null", O_RDWR);
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// dup(0);
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// dup(0);
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// }
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// close(STDOUT_FILENO);
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// close(STDERR_FILENO);
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while (1) {
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int status = system("../go-files/info");
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// TODO SECURITY ISSUE
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// LINK https://stackoverflow.com/questions/5237482/how-do-i-execute-an-external-program-within-c-code-in-linux-with-arguments#
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sleep(1);
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}
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exit(EXIT_SUCCESS);
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}
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@ -3,7 +3,10 @@
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int _daemon (int, int);
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int _daemon (int, int);
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int main(){
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int main(){
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printf("START");
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_daemon(0, 0);
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_daemon(0, 0);
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printf("END");
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getchar();
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getchar();
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printf("CLOSE");
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return 0;
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return 0;
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}
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}
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