Разработка приложений в среде Linux. Второе издание

  5: #include <string.h>
  6: #include <time.h>
  7: #include <sys/time.h>
  8: #include <sys/types.h>
  9: #include <sys/socket.h>
 10: #include <netinet/in.h>
 11: #include <arpa/inet.h>
 12: #include <utmp.h>
 13: #include <popt.h>
 14:
 15: void print_utmp_entry(struct utmp * u) {
 16:  struct tm *tp;
 17:  char * type;
 18:  char addrtext[INET6_ADDRSTRLEN];
 19:
 20:  switch (u->ut_type) {
 21:  case EMPTY: type = 'EMPTY'; break;
 22:  case RUN_LVL: type = 'RUN_LVL'; break;
 23:  case BOOT_TIME: type = 'BOOT_TIME'; break;
 24:  case NEW_TIME: type = 'NEW_TIME'; break;
 25:  case OLD_TIME: type = 'OLD_TIME'; break;
 26:  case INIT_PROCESS: type = 'INIT_PROCESS'; break;
 27:  case LOGIN_PROCESS: type = 'LOGIN_PROCESS'; break;
 28:  case USER_PROCESS: type = 'USER_PROCESS'; break;
 29:  case DEAD_PROCESS: type = 'DEAD_PROCESS'; break;
 30:  case ACCOUNTING: type = 'ACCOUNTING '; break;
 31:  }
 32:  printf('%-13s:', type);
 33:  switch (u->ut_type) {
 34:  case LOGIN_PROCESS:
 35:  case USER_PROCESS:
 36:  case DEAD_PROCESS:
 37:   printf(' line: %s', u->ut_line);
 38:   /* fall through */
 39:  case INIT_PROCESS:
 40:   printf('
 pid: %6d id: %4.4s', u->ut_pid, u->ut_id);
 41:  }
 42:  printf ('
');
 43:  tp = gmtime(&u->ut_tv.tv_sec);
 44:  printf('time: %24.24s.%lu
', asctime(tp), u->ut_tv.tv_usec);
 45:  switch (u->ut_type) {
 46:  case USER_PROCESS:
 47:  case LOGIN_PROCESS:
 48:  case RUN_LVL:
 49:  case BOOT_TIME:
 50:   printf('пользователь: %s
', u->ut_user);
 51:  }
 52:  if (u->ut_type == USER_PROCESS) {
 53:   if (u->ut_session)
 54:    printf(' сеанс: %lu
', u->ut_session);
 55:   if (u->ut_host)
 56:    printf (' хост: %s
', u->ut_host);
 57:   if (u->ut_addr_v6[0]) {
 58:    if (!(u->ut_addr_v6[1] |
 59:     u->ut_addr_v6[2] |
 60:     u->ut_addr_v6[3])) {
 61:     /* заполнение только первой группы означает адрес IPV4 */
 62:     inet_ntop(AF_INET, u->ut_addr_v6,
 63:     addrtext, sizeof(addrtext));
 64:     printf(' IPV4: %s
', addrtext);
 65:    } else {
 66:     inet_ntop(AF_INET_6, u->ut_addr_v6,
 67:      addrtext, sizeof(addrtext));
 68:     printf (' IPV6: %s
', addrtext);
 69:    }
 70:   }
 71:  }
 72:  if (u->ut_type == DEAD_PROCESS) {
 73:   printf(' завершение : %u: %u
',
 74:    u->ut_exit.e_termination,
 75:    u->ut_exit.e_exit);
 76:  }
 77:  printf('
');
 78: }
 79:
 80: struct utmp * get_next_line (char * id, char * line) {
 81:  struct utmp request;
 82:
 83:  if (!id && !line)
 84:   return getutent();
 85:
 86:  memset(&request, 0, sizeof(request));
 87:
 88:  if (line) {
 89:   strncpy(&request.ut_line[0], line, UT_LINESIZE);
 90:   return getutline(&request);
 91:  }
 92:
 93:  request.ut_type = INIT_PROCESS;
 94:  strncpy(&request.ut_id[0], id, 4);
 95:  return getutid(&request);
 96: }
 97:
 98: void print_file(char * name, char * id, char * line) {
 99:  struct utmp * u;
100:
101:  if (utmpname(name)) {
102:   fprintf (stderr, 'сбой при открытии базы данных utmp %s
', name);
103:   return;