UNIX for Advanced & Expert Users

>/var/log/wtmp

wtmpfix /var/~/stmp >temp
fwtmp -x < temp > /var/~/wtmp

/*
 * fix utmp file for 'zombie' logins
 * Looks if the pid of user processes are realy running
 *
 * Usage: utmpfix [utmp_file]
 *
 * hpux@voss2000.de 2000-09-28
 *
 */

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <utmp.h>


main(argc, argv)
int    argc;
char **argv;
{
  char        *file ;
  struct utmp *entry;

  if(argc > 1)
    file=argv[1];
  else
    file=UTMP_FILE;

  utmpname(file);

  while((entry = getutent()) != (struct utmp *)NULL)
  {
    entry->ut_user[8] = 0;
    if(entry->ut_type == USER_PROCESS)
    {
      if(kill(entry->ut_pid, 0) != 0) /* check for pid exsistens */
      {
        entry->ut_type = DEAD_PROCESS; /* no pid -> change to dead proc */
        if(_pututline(entry) == NULL)
        {
          (void) fprintf(stderr, "utmpfix: cannot write to %s!\n", file);
          exit(1);
        }
      }
    }
  }
  endutent();
  return(0);
}