glibc/login/programs/utmpdump.c

/* utmpdump - dump utmp-like files.
   Copyright (C) 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <errno.h>
#include <error.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <utmp.h>

void
print_entry (struct utmp *up)
{
  printf ("[%d] [%05d] [%-4.4s] [%-8.8s] [%-12.12s] [%-15.15s] [%ld]\n",
	  up->ut_type, up->ut_pid, up->ut_id, up->ut_user,
	  up->ut_line, 4 + ctime (&up->ut_time), up->ut_tv.tv_usec);
}

int
main (int argc, char *argv[])
{
  struct utmp *up;

  if (argc > 1)
    utmpname (argv[1]);
  
  setutent ();

  while ((up = getutent ()))
    print_entry (up);

  endutent ();
  
  return EXIT_SUCCESS;
}