Back to index

glibc  2.9
vdprintf_chk.c
Go to the documentation of this file.
00001 /* Copyright (C) 1995, 1997-2000, 2001, 2002, 2003, 2006, 2008
00002    Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.
00019 
00020    As a special exception, if you link the code in this file with
00021    files compiled with a GNU compiler to produce an executable,
00022    that does not cause the resulting executable to be covered by
00023    the GNU Lesser General Public License.  This exception does not
00024    however invalidate any other reasons why the executable file
00025    might be covered by the GNU Lesser General Public License.
00026    This exception applies to code released by its copyright holders
00027    in files containing the exception.  */
00028 
00029 #include <libioP.h>
00030 #include <stdio_ext.h>
00031 
00032 int
00033 __vdprintf_chk (int d, int flags, const char *format, va_list arg)
00034 {
00035   struct _IO_FILE_plus tmpfil;
00036   struct _IO_wide_data wd;
00037   int done;
00038 
00039 #ifdef _IO_MTSAFE_IO
00040   tmpfil.file._lock = NULL;
00041 #endif
00042   _IO_no_init (&tmpfil.file, _IO_USER_LOCK, 0, &wd, &_IO_wfile_jumps);
00043   _IO_JUMPS (&tmpfil) = &_IO_file_jumps;
00044   INTUSE(_IO_file_init) (&tmpfil);
00045 #if  !_IO_UNIFIED_JUMPTABLES
00046   tmpfil.vtable = NULL;
00047 #endif
00048   if (INTUSE(_IO_file_attach) (&tmpfil.file, d) == NULL)
00049     {
00050       INTUSE(_IO_un_link) (&tmpfil);
00051       return EOF;
00052     }
00053   tmpfil.file._IO_file_flags =
00054     (_IO_mask_flags (&tmpfil.file, _IO_NO_READS,
00055                    _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING)
00056      | _IO_DELETE_DONT_CLOSE);
00057 
00058   /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
00059      can only come from read-only format strings.  */
00060   if (flags > 0)
00061     tmpfil.file._flags2 |= _IO_FLAGS2_FORTIFY;
00062 
00063   done = INTUSE(_IO_vfprintf) (&tmpfil.file, format, arg);
00064 
00065   _IO_FINISH (&tmpfil.file);
00066 
00067   return done;
00068 }
00069 libc_hidden_def (__vdprintf_chk)