sysdeps/unix/sysv/linux/fcntl64.c

   1 /* Manipulate file descriptor.  Linux LFS version.
   2    Copyright (C) 2018-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #define fcntl __no_decl_fcntl
  20 #define __fcntl __no_decl___fcntl
  21 #include <fcntl.h>
  22 #undef fcntl
  23 #undef __fcntl
  24 #include <stdarg.h>
  25 #include <errno.h>
  26 #include <sysdep-cancel.h>
  27
  28 #ifndef __NR_fcntl64
  29 # define __NR_fcntl64 __NR_fcntl
  30 #endif
  31
  32 #ifndef FCNTL_ADJUST_CMD
  33 # define FCNTL_ADJUST_CMD(__cmd) __cmd
  34 #endif
  35
  36 int
  37 __libc_fcntl64 (int fd, int cmd, ...)
  38 {
  39   va_list ap;
  40   void *arg;
  41
  42   va_start (ap, cmd);
  43   arg = va_arg (ap, void *);
  44   va_end (ap);
  45
  46   cmd = FCNTL_ADJUST_CMD (cmd);
  47
  48   if (cmd == F_SETLKW || cmd == F_SETLKW64 || cmd == F_OFD_SETLKW)
  49     return SYSCALL_CANCEL (fcntl64, fd, cmd, arg);
  50
  51   return __fcntl64_nocancel_adjusted (fd, cmd, arg);
  52 }
  53 libc_hidden_def (__libc_fcntl64)
  54 weak_alias (__libc_fcntl64, __fcntl64)
  55 libc_hidden_weak (__fcntl64)
  56 weak_alias (__libc_fcntl64, fcntl64)
  57
  58 #ifdef __OFF_T_MATCHES_OFF64_T
  59 weak_alias (__libc_fcntl64, __libc_fcntl)
  60 weak_alias (__libc_fcntl64, __fcntl)
  61 weak_alias (__libc_fcntl64, __GI___fcntl)
  62 weak_alias (__libc_fcntl64, fcntl)
  63 #endif