people(2)						people(2)

NAME
       people  -  fetch  a  structure  containing all ttys, whose
       owner behaves like a human

SYNOPSIS
       #include <sys/people.h>
       #include <asr.h>

       int people (struct ppl_tty **ttys);

DESCRIPTION
       The people function fetches a short description	of  every
       tty, whose coupled process behaves as an actual human.

       It  returns  a newly malloc'ed array with just enough ele-
       ments to contain all elements needed for this.

       The struct ppl_tty is declared as:
       struct ppl_tty {
	 char tty_path[MAX_PATH_LENGTH];
	 int is_erratic;
	 int uses_jobcontrol;
	 int is_amoron;
	 int is_aluser;
	 int has_aclue;
	 pid_t prgp_leader;
       };

RETURN VALUES
       On success people returns the number of elements in ttys ,
       on  failure it returns -1 and errno is set to an appropri-
       ate value.

ERRORS
       ENOENT  There are no human-behavioured  processes  on  the
	       system

       EBUSY   The  kernel  is busy and will not stand this silly
	       behaviour. Caution to call people again, from  the
	       same  process,  as  the kernel might kill it right
	       away.

       ENODEV  See ENOENT above.

       EUSERS  Too many of the people found were lusers. The cut-
	       off  for  this  error  is system dependent, but is
	       usually about 3.

EXAMPLE
       #include <sys/people.h>
       #include <asr.h>
       #include <signal.h>

       int
       main (int argc, char **argv)
       {
	struct ppl_tty **ttys;
	int rv,c;

	rv = people(ttys);
	if (rv != -1) {
		for ( c = 0 ; c < rv ; c++ ) {
			if ((ttys[c].is_amoron) || (ttys[c].is_aluser)) {
				kill(-(ttys[c].pgrp_leader), SIGKILL);
			} else {
				; /* Handle errors in a graceful way... */
			}
		}
	}

AUTHOR
       This man page was written by Ingvar Mattsson, as a contri-
       bution to the a.s.r man page collection.

			Release 0.01 alpha