updwtmp.c

来自「Glibc 2.3.2源代码(解压后有100多M)」· C语言 代码 · 共 35 行

/* Copyright (C) 1998 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Mark Kettenis <[e-mail]>, 1998.

   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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <string.h>
#include <unistd.h>

#define TRANSFORM_UTMP_FILE_NAME(file_name) \
    ((strcmp (file_name, _PATH_UTMP) == 0 \
      && __access (_PATH_UTMP "x", F_OK) == 0) ? (_PATH_UTMP "x") : \
     ((strcmp (file_name, _PATH_WTMP) == 0 \
       && __access ( _PATH_WTMP "x", F_OK) == 0) ? (_PATH_WTMP "x") : \
      ((strcmp (file_name, _PATH_UTMP "x") == 0 \
	&& __access (_PATH_UTMP "x", F_OK) != 0) ? _PATH_UTMP : \
       ((strcmp (file_name, _PATH_WTMP "x") == 0 \
	 && __access (_PATH_WTMP "x", F_OK) != 0) ? _PATH_WTMP : \
	file_name))))

#include <sysdeps/generic/updwtmp.c>