sysdeps/unix/sysv/linux/open.c

   1 /* Copyright (C) 2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
   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 #include <sys/types.h>
  20 #include <sys/stat.h>
  21 #include <fcntl.h>
  22 #include <stdarg.h>
  23
  24 #include <sysdep-cancel.h>
  25 #include <not-cancel.h>
  26
  27 #ifndef __OFF_T_MATCHES_OFF64_T
  28
  29 /* Open FILE with access OFLAG.  If O_CREAT or O_TMPFILE is in OFLAG,
  30    a third argument is the file protection.  */
  31 int
  32 __libc_open (const char *file, int oflag, ...)
  33 {
  34   int mode = 0;
  35
  36   if (__OPEN_NEEDS_MODE (oflag))
  37     {
  38       va_list arg;
  39       va_start (arg, oflag);
  40       mode = va_arg (arg, int);
  41       va_end (arg);
  42     }
  43
  44   return SYSCALL_CANCEL (openat, AT_FDCWD, file, oflag, mode);
  45 }
  46 libc_hidden_def (__libc_open)
  47
  48 weak_alias (__libc_open, __open)
  49 libc_hidden_weak (__open)
  50 weak_alias (__libc_open, open)
  51
  52 # if !IS_IN (rtld)
  53 int
  54 __open_nocancel (const char *file, int oflag, ...)
  55 {
  56   int mode = 0;
  57
  58   if (__OPEN_NEEDS_MODE (oflag))
  59     {
  60       va_list arg;
  61       va_start (arg, oflag);
  62       mode = va_arg (arg, int);
  63       va_end (arg);
  64     }
  65
  66   return INLINE_SYSCALL_CALL (openat, AT_FDCWD, file, oflag, mode);
  67 }
  68 # else
  69 strong_alias (__libc_open, __open_nocancel)
  70 # endif
  71 libc_hidden_def (__open_nocancel)
  72 #endif