sysdeps/unix/sysv/linux/utmp_file.c

   1 /* Copyright (C) 1998-2024 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 #include <string.h>
  19 #include <unistd.h>
  20
  21 #define TRANSFORM_UTMP_FILE_NAME(file_name)             \
  22   ((strcmp (file_name, _PATH_UTMP) == 0                 \
  23     && __access (_PATH_UTMP "x", F_OK) == 0)            \
  24    ? (_PATH_UTMP "x")                                   \
  25    : ((strcmp (file_name, _PATH_WTMP) == 0              \
  26        && __access ( _PATH_WTMP "x", F_OK) == 0)        \
  27       ? (_PATH_WTMP "x")                                \
  28       : ((strcmp (file_name, _PATH_UTMP "x") == 0       \
  29           && __access (_PATH_UTMP "x", F_OK) != 0)      \
  30          ? _PATH_UTMP                                   \
  31          : ((strcmp (file_name, _PATH_WTMP "x") == 0    \
  32              && __access (_PATH_WTMP "x", F_OK) != 0)   \
  33             ? _PATH_WTMP                                \
  34             : file_name))))
  35
  36 #include <login/utmp_file.c>