Subj : About daemon_init
To   : comp.programming.threads
From : QQ
Date : Mon May 16 2005 03:27 pm

Hello I am new on threads.
I am reading this example code, however, I can't understand it,
even though I search the usage of setpid, umask.
Can anyone explain it for me?
What's daemon?

Thank you very much!
#include  <sys/types.h>
#include  <sys/stat.h>


int  daemon_init(void)
{pid_t    pid, pid1;


 if((pid=3Dfork())<0) exit(-1);
 else if(pid)
  {printf("pid=3D%d\n",(int)pid);e=ADxit( 0);} /* parent */


 /* child  */
 printf("uid=3D%d gid=3D%d egid=3D%d \n",
    (int) getuid(),(int) getgid(),(int) getegid() );
 pid1=3Dsetsid(); /* diventa session leader */
 chdir("/");
 umask(0);
 printf("uid=3D%d gid=3D%d pid1=3D%d egid=3D%d \n",
    (int) getuid(),(int) getgid(),(int)pid1, (int) getegid() );
 sleep(20);
 _exit(1);  =20



}=20


int  main()=20
{daemon_init();=20
 exit(0);=20

}

.