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       1                 :            : /* Control an ELF file desrciptor.
       2                 :            :    Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
       3                 :            :    This file is part of elfutils.
       4                 :            :    Written by Ulrich Drepper <drepper@redhat.com>, 1998.
       5                 :            : 
       6                 :            :    This file is free software; you can redistribute it and/or modify
       7                 :            :    it under the terms of either
       8                 :            : 
       9                 :            :      * the GNU Lesser General Public License as published by the Free
      10                 :            :        Software Foundation; either version 3 of the License, or (at
      11                 :            :        your option) any later version
      12                 :            : 
      13                 :            :    or
      14                 :            : 
      15                 :            :      * the GNU General Public License as published by the Free
      16                 :            :        Software Foundation; either version 2 of the License, or (at
      17                 :            :        your option) any later version
      18                 :            : 
      19                 :            :    or both in parallel, as here.
      20                 :            : 
      21                 :            :    elfutils is distributed in the hope that it will be useful, but
      22                 :            :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23                 :            :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24                 :            :    General Public License for more details.
      25                 :            : 
      26                 :            :    You should have received copies of the GNU General Public License and
      27                 :            :    the GNU Lesser General Public License along with this program.  If
      28                 :            :    not, see <http://www.gnu.org/licenses/>.  */
      29                 :            : 
      30                 :            : #ifdef HAVE_CONFIG_H
      31                 :            : # include <config.h>
      32                 :            : #endif
      33                 :            : 
      34                 :            : #include "libelfP.h"
      35                 :            : 
      36                 :            : 
      37                 :            : int
      38                 :       1838 : elf_cntl (Elf *elf, Elf_Cmd cmd)
      39                 :            : {
      40                 :       1838 :   int result = 0;
      41                 :            : 
      42         [ -  + ]:       1838 :   if (elf == NULL)
      43                 :            :     return -1;
      44                 :            : 
      45         [ -  + ]:       1838 :   if (elf->fildes == -1)
      46                 :            :     {
      47                 :          0 :       __libelf_seterrno (ELF_E_INVALID_HANDLE);
      48                 :          0 :       return -1;
      49                 :            :     }
      50                 :            : 
      51                 :       1838 :   rwlock_wrlock (elf->lock);
      52                 :            : 
      53      [ +  +  - ]:       1838 :   switch (cmd)
      54                 :            :     {
      55                 :       1438 :     case ELF_C_FDREAD:
      56                 :            :       /* If not all of the file is in the memory read it now.  */
      57   [ +  +  -  + ]:       1438 :       if (elf->map_address == NULL && __libelf_readall (elf) == NULL)
      58                 :            :         {
      59                 :            :           /* We were not able to read everything.  */
      60                 :            :           result = -1;
      61                 :            :           break;
      62                 :            :         }
      63                 :       1838 :       FALLTHROUGH;
      64                 :            : 
      65                 :            :     case ELF_C_FDDONE:
      66                 :            :       /* Mark the file descriptor as not usable.  */
      67                 :       1838 :       elf->fildes = -1;
      68                 :       1838 :       break;
      69                 :            : 
      70                 :          0 :     default:
      71                 :          0 :       __libelf_seterrno (ELF_E_INVALID_CMD);
      72                 :          0 :       result = -1;
      73                 :          0 :       break;
      74                 :            :     }
      75                 :            : 
      76                 :            :   rwlock_unlock (elf->lock);
      77                 :            : 
      78                 :            :   return result;
      79                 :            : }