v0.0.1

2025-12-22 15:19:23 +00:00 · 2021-06-15 16:38:30 +01:00
commit 8c5c5c0f45
12 changed files with 468 additions and 0 deletions
--- a/pdetach.c
+++ b/pdetach.c
@@ -0,0 +1,65 @@
+#include <unistd.h>
+#include <signal.h>
+#include <sysexits.h>
+
+#ifdef  SIGTSTP
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#endif
+ 
+/* normally included from paths.h */
+
+#ifndef _PATH_TTY
+#define _PATH_TTY "/dev/tty"
+#endif
+ 
+void    pdetach(void)
+{
+        int pid;
+        int fd;
+
+        /* if we are started from init, no need to become daemon */
+ 
+        if(getppid() == 1)
+                return;
+ 
+#ifdef  SIGTTOU
+        signal(SIGTTOU, SIG_IGN);
+#endif
+ 
+#ifdef  SIGTTIN
+        signal(SIGTTIN, SIG_IGN);
+#endif                                                                          
+
+#ifdef  SIGTSTP
+        signal(SIGTSTP, SIG_IGN);
+#endif
+ 
+        if((pid = fork()) < 0)
+                exit(EX_OSERR);
+        else if(pid > 0)
+                exit(0);
+ 
+ 
+#if     defined(SIGTSTP) && defined(TIOCNOTTY)
+        if(setpgid(0, getpid()) == -1)
+                exit(EX_OSERR);
+
+        if((fd = open(_PATH_TTY, O_RDWR)) >= 0)
+        {
+                ioctl(fd, TIOCNOTTY, NULL);
+                close(fd);
+        }
+#else
+        if(setpgrp() == -1)
+                exit(EX_OSERR);
+ 
+        signal(SIGHUP, SIG_IGN);
+ 
+        if((pid = fork()) < 0)
+                exit(OS_ERR);
+        else if(pid > 0)
+                exit(0);
+ 
+#endif                                                                                                                                                          
+}