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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                 :        1818 : elf_cntl (Elf *elf, Elf_Cmd cmd)
      39                 :             : {
      40                 :        1818 :   int result = 0;
      41                 :             : 
      42         [ -  + ]:        1818 :   if (elf == NULL)
      43                 :             :     return -1;
      44                 :             : 
      45      [ +  +  - ]:        1818 :   switch (cmd)
      46                 :             :     {
      47                 :        1418 :     case ELF_C_FDREAD:
      48                 :             :       /* If not all of the file is in the memory read it now.  */
      49         [ -  + ]:        1418 :       if (__libelf_readall (elf) == NULL)
      50                 :             :         {
      51                 :             :           /* We were not able to read everything.  */
      52                 :             :           result = -1;
      53                 :             :           break;
      54                 :             :         }
      55                 :        1818 :       FALLTHROUGH;
      56                 :             : 
      57                 :             :     case ELF_C_FDDONE:
      58                 :             :       /* Mark the file descriptor as not usable.  */
      59                 :        1818 :       rwlock_wrlock (elf->lock);
      60                 :        1818 :       elf->fildes = -1;
      61                 :        1818 :       rwlock_unlock (elf->lock);
      62                 :        1818 :       break;
      63                 :             : 
      64                 :           0 :     default:
      65                 :           0 :       __libelf_seterrno (ELF_E_INVALID_CMD);
      66                 :           0 :       result = -1;
      67                 :           0 :       break;
      68                 :             :     }
      69                 :             : 
      70                 :             :   return result;
      71                 :             : }