kc3-lang/gnulib/lib/dup.c

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• Hash : 4810e2dc
  Author :
  Date : 2011-09-24T02:08:13
  

  New module 'dup'.
  
  * lib/unistd.in.h (dup): Declare only if the 'dup' module is in use.
  Allow replacement.
  * lib/dup.c: New file.
  * lib/fchdir.c (rpl_dup): Remove function.
  * m4/dup.m4: New file.
  * m4/fchdir.m4 (gl_FUNC_FCHDIR): Don't set REPLACE_DUP here.
  * m4/unistd_h.m4 (gl_UNISTD_H): Test whether 'dup' is declared.
  (gl_UNISTD_H_DEFAULTS): Initialize GNULIB_DUP.
  * modules/unistd (Makefile.am): Substitute GNULIB_DUP.
  * modules/dup: New file.
  * tests/test-unistd-c++.cc: Check the signature of 'dup' only if the
  'dup' module is in use.
  * modules/fdopendir (Depends-on): Add dup.
  * modules/fdutimensat-tests (Depends-on): Likewise.
  * modules/fts (Depends-on): Likewise.
  * modules/futimens-tests (Depends-on): Likewise.
  * modules/posix_spawnp-tests (Depends-on): Likewise.
  * modules/unistd-safer-tests (Depends-on): Likewise.
  * modules/utimens-tests (Depends-on): Likewise.
  * doc/posix-functions/dup.texi: Mention the new module and the problem
  on MSVC.
  

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• lib/dup.c

• /* Duplicate an open file descriptor.
  
     Copyright (C) 2011 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <unistd.h>
  
  #include <errno.h>
  
  #include "msvc-inval.h"
  
  #undef dup
  
  #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
  static inline int
  dup_nothrow (int fd)
  {
    int result;
  
    TRY_MSVC_INVAL
      {
        result = dup (fd);
      }
    CATCH_MSVC_INVAL
      {
        result = -1;
        errno = EBADF;
      }
    DONE_MSVC_INVAL;
  
    return result;
  }
  #else
  # define dup_nothrow dup
  #endif
  
  int
  rpl_dup (int fd)
  {
    int result = dup_nothrow (fd);
  #if REPLACE_FCHDIR
    if (result >= 0)
      result = _gl_register_dup (fd, result);
  #endif
    return result;
  }
  

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