daemonf.c

Linux环境登陆源码

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

int daemon_init(void)
{
   pid_t pid;
   
   if((pid=fork()) < 0)
      return(-1);
   else if(pid != 0)
      exit(0);   /* parent goes end */

/* child continues */
   setsid();		/* become session leader */
   chdir("/");		/* change working directory */
   umask(0);		/* clear our file nmode creation mask */
/* close std file descript */
   close(STDIN_FILENO);
   close(STDOUT_FILENO);
   return(0);
}