1  /* Copyright (C) 2008-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  
      19  /* This file provides functions converting between the 32 and 64 bit
      20     struct utmp variants.  */
      21  
      22  #ifndef _UTMPX_CONVERT_H
      23  #define _UTMPX_CONVERT_H 1
      24  
      25  #include <string.h>
      26  #include "utmpx32.h"
      27  
      28  /* Convert the 64 bit struct utmpx value in FROM to the 32 bit version
      29     returned in TO.  */
      30  static inline void
      31  utmpx_convert64to32 (const struct utmpx *from, struct utmpx32 *to)
      32  {
      33  #if _HAVE_UT_TYPE - 0
      34    to->ut_type = from->ut_type;
      35  #endif
      36  #if _HAVE_UT_PID - 0
      37    to->ut_pid = from->ut_pid;
      38  #endif
      39    memcpy (to->ut_line, from->ut_line, __UT_LINESIZE);
      40    memcpy (to->ut_user, from->ut_user, __UT_NAMESIZE);
      41  #if _HAVE_UT_ID - 0
      42    memcpy (to->ut_id, from->ut_id, 4);
      43  #endif
      44  #if _HAVE_UT_HOST - 0
      45    memcpy (to->ut_host, from->ut_host, __UT_HOSTSIZE);
      46  #endif
      47    to->ut_exit = from->ut_exit;
      48    to->ut_session = (int32_t) from->ut_session;
      49  #if _HAVE_UT_TV - 0
      50    to->ut_tv.tv_sec = (int32_t) from->ut_tv.tv_sec;
      51    to->ut_tv.tv_usec = (int32_t) from->ut_tv.tv_usec;
      52  #endif
      53    memcpy (to->ut_addr_v6, from->ut_addr_v6, 4 * 4);
      54  }
      55  
      56  /* Convert the 32 bit struct utmpx value in FROM to the 64 bit version
      57     returned in TO.  */
      58  static inline void
      59  utmpx_convert32to64 (const struct utmpx32 *from, struct utmpx *to)
      60  {
      61  #if _HAVE_UT_TYPE - 0
      62    to->ut_type = from->ut_type;
      63  #endif
      64  #if _HAVE_UT_PID - 0
      65    to->ut_pid = from->ut_pid;
      66  #endif
      67    memcpy (to->ut_line, from->ut_line, __UT_LINESIZE);
      68    memcpy (to->ut_user, from->ut_user, __UT_NAMESIZE);
      69  #if _HAVE_UT_ID - 0
      70    memcpy (to->ut_id, from->ut_id, 4);
      71  #endif
      72  #if _HAVE_UT_HOST - 0
      73    memcpy (to->ut_host, from->ut_host, __UT_HOSTSIZE);
      74  #endif
      75    to->ut_exit = from->ut_exit;
      76    to->ut_session = (int64_t) from->ut_session;
      77  #if _HAVE_UT_TV - 0
      78    to->ut_tv.tv_sec = (int64_t) from->ut_tv.tv_sec;
      79    to->ut_tv.tv_usec = (int64_t) from->ut_tv.tv_usec;
      80  #endif
      81    memcpy (to->ut_addr_v6, from->ut_addr_v6, 4 * 4);
      82  }
      83  
      84  #endif /* utmpx-convert.h */