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#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/termios.h>
#include <fcntl.h>
#include "dictd.h"
int daemon (int nochdir, int noclose)
{
int i;
int fd;
switch (fork()) {
case -1: err_fatal_errno( __func__, "Cannot fork\n" ); break;
case 0: break; /* child */
default: exit(0); /* parent */
}
/* The detach algorithm is a modification of that presented by Comer,
Douglas E. and Stevens, David L. INTERNETWORKING WITH TCP/IP, VOLUME
III: CLIENT-SERVER PROGRAMMING AND APPLICATIONS (BSD SOCKET VERSION).
Englewood Cliffs, New Jersey: Prentice Hall, 1993 (Chapter 27). */
if (!noclose)
for (i=getdtablesize()-1; i >= 0; --i)
close(i); /* close everything */
#if defined(__hpux__) || defined(__CYGWIN__) || defined(__INTERIX) || defined(__OPENNT)
#ifndef TIOCNOTTY
#define NO_IOCTL_TIOCNOTTY
#endif /* TIOCNOTTY */
#endif /* strange platforms */
#ifndef NO_IOCTL_TIOCNOTTY
if ((fd = open("/dev/tty", O_RDWR)) >= 0) {
/* detach from controlling tty */
ioctl(fd, TIOCNOTTY, 0);
close(fd);
}
#endif
if (!nochdir)
chdir("/"); /* cd to safe directory */
setpgid(0,getpid()); /* Get process group */
if (!noclose){
fd = open("/dev/null", O_RDWR); /* stdin */
dup(fd); /* stdout */
dup(fd); /* stderr */
}
}
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