| /* utmpdump - dump utmp-like files. |
| Copyright (C) 1997-2014 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 Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <time.h> |
| #include <unistd.h> |
| #include <utmp.h> |
| |
| static void |
| print_entry (struct utmp *up) |
| { |
| /* Mixed 32-/64-bit systems may have timeval structs of different sixe |
| but need struct utmp to be the same size. So in 64-bit up->ut_tv may |
| not be a timeval but a struct of __int32_t's. This would cause a compile |
| time warning and a formating error when 32-bit int is passed where |
| a 64-bit long is expected. So copy up->up_tv to a temporary timeval. |
| This is 32-/64-bit agnostic and expands the timeval fields to the |
| expected size as needed. */ |
| struct timeval temp_tv; |
| temp_tv.tv_sec = up->ut_tv.tv_sec; |
| temp_tv.tv_usec = up->ut_tv.tv_usec; |
| |
| (printf) ( |
| /* The format string. */ |
| #if _HAVE_UT_TYPE |
| "[%d] " |
| #endif |
| #if _HAVE_UT_PID |
| "[%05d] " |
| #endif |
| #if _HAVE_UT_ID |
| "[%-4.4s] " |
| #endif |
| "[%-8.8s] [%-12.12s]" |
| #if _HAVE_UT_HOST |
| " [%-16.16s]" |
| #endif |
| " [%-15.15s]" |
| #if _HAVE_UT_TV |
| " [%ld]" |
| #endif |
| "\n" |
| /* The arguments. */ |
| #if _HAVE_UT_TYPE |
| , up->ut_type |
| #endif |
| #if _HAVE_UT_PID |
| , up->ut_pid |
| #endif |
| #if _HAVE_UT_ID |
| , up->ut_id |
| #endif |
| , up->ut_user, up->ut_line |
| #if _HAVE_UT_HOST |
| , up->ut_host |
| #endif |
| #if _HAVE_UT_TV |
| , 4 + ctime (&temp_tv.tv_sec) |
| , (long int) temp_tv.tv_usec |
| #else |
| , 4 + ctime (&up->ut_time) |
| #endif |
| ); |
| } |
| |
| 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; |
| } |