kc3-lang/gnulib/lib/lseek.c

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• Hash : 3f3d9b41
  Author :
  Date : 2012-04-14T23:27:45
  

  Large File Support for native Windows platforms.
  
  * m4/largefile.m4 (gl_LARGEFILE): New macro.
  * modules/largefile (configure.ac): Require gl_LARGEFILE.
  
  * lib/sys_types.in.h (off_t) [WINDOWS_64_BIT_OFF_T]: Define to a 64-bit
  type.
  * m4/sys_types_h.m4 (gl_SYS_TYPES_H): Set WINDOWS_64_BIT_OFF_T.
  * modules/sys_types (Makefile.am): Substitute WINDOWS_64_BIT_OFF_T.
  * doc/posix-headers/sys_types.texi: Mention the effect of the
  'largefile' module.
  
  * lib/fcntl.in.h: Add comments about off_t.
  * modules/fcntl-h (Depends-on): Add sys_types.
  
  * lib/unistd.in.h [WINDOWS_64_BIT_OFF_T]: Include <sys/types.h>.
  (ftruncate): Replace it if REPLACE_FTRUNCATE is 1.
  * m4/unistd_h.m4 (gl_UNISTD_H): Require gl_SYS_TYPES_H.
  (gl_UNISTD_H_DEFAULTS): Initialize REPLACE_FTRUNCATE.
  * modules/unistd (Depends-on): Add sys_types.
  (Makefile.am): Substitute WINDOWS_64_BIT_OFF_T, REPLACE_FTRUNCATE.
  
  * lib/lseek.c (rpl_lseek) [_GL_WINDOWS_64_BIT_OFF_T]: Use _lseeki64
  instead of lseek.
  * m4/lseek.m4 (gl_FUNC_LSEEK): Require gl_SYS_TYPES_H. Set
  REPLACE_LSEEK if WINDOWS_64_BIT_OFF_T is 1.
  * modules/lseek (Depends-on): Add sys_types.
  
  * lib/ftruncate.c: Put under GPLv3+. Include <windows.h>,
  msvc-nothrow.h.
  (SetFileSize): New function.
  (ftruncate) [_GL_WINDOWS_64_BIT_OFF_T]: New implementation.
  * m4/ftruncate.m4 (gl_FUNC_FTRUNCATE): Set REPLACE_FTRUNCATE on Windows
  if Large File Support is requested.
  * modules/ftruncate (configure.ac): Consider REPLACE_FTRUNCATE.
  (Depends-on): Add sys_types, msvc-nothrow. Update conditions.
  
  * lib/stdio.in.h: Add comments about off_t.
  * modules/stdio (Depends-on): Add sys_types.
  
  * lib/ftello.c [_GL_WINDOWS_64_BIT_OFF_T]: Use _ftelli64 or ftello64
  instead of ftello.
  * m4/ftello.m4 (gl_FUNC_FTELLO): Require gl_SYS_TYPES_H. Set
  REPLACE_FTELLO if WINDOWS_64_BIT_OFF_T is 1.
  (gl_PREREQ_FTELLO): New macro.
  * modules/ftello (Depends-on): Add sys_types.
  (configure.ac): Incoke gl_PREREQ_FTELLO.
  
  * lib/fseeko.c [_GL_WINDOWS_64_BIT_OFF_T]: Use _fseeki64 or fseeko64
  instead of fseeko.
  * m4/fseeko.m4 (gl_FUNC_FSEEKO): Require gl_SYS_TYPES_H. Set
  REPLACE_FSEEKO if WINDOWS_64_BIT_OFF_T is 1.
  (gl_PREREQ_FSEEKO): New macro.
  * modules/fseeko (Depends-on): Add sys_types.
  (configure.ac): Invoke gl_PREREQ_FSEEKO.
  
  * lib/sys_stat.in.h: Add comments about off_t.
  (stat, fstat) [WINDOWS_64_BIT_ST_SIZE]: Define to variants that use a
  64-bit integer for st_size in 'struct stat'.
  * m4/sys_stat_h.m4 (gl_HEADER_SYS_STAT_H): Set WINDOWS_64_BIT_ST_SIZE.
  Define _GL_WINDOWS_64_BIT_ST_SIZE.
  * modules/sys_stat (Depends-on): Add sys_types.
  (Makefile.am): Substitute WINDOWS_64_BIT_ST_SIZE.
  
  * lib/stat.c (stat) [_GL_WINDOWS_64_BIT_ST_SIZE]: Define to _stati64
  instead of stat or _stat.
  
  * lib/fstat.c [_GL_WINDOWS_64_BIT_ST_SIZE]: Use _fstati64 and
  'struct _stati64' instead of fstat and 'struct stat'.
  * m4/fstat.m4 (gl_FUNC_FSTAT): Require gl_HEADER_SYS_STAT_H. Set
  REPLACE_FSTAT if WINDOWS_64_BIT_ST_SIZE is 1.
  
  Reported by Ray Satiro <raysatiro@yahoo.com>.
  

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• lib/lseek.c

• /* An lseek() function that detects pipes.
     Copyright (C) 2007, 2009-2012 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 2, 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>
  
  #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
  /* Windows platforms.  */
  /* Get GetFileType.  */
  # include <windows.h>
  /* Get _get_osfhandle.  */
  # include "msvc-nothrow.h"
  #else
  # include <sys/stat.h>
  #endif
  #include <errno.h>
  
  #undef lseek
  
  off_t
  rpl_lseek (int fd, off_t offset, int whence)
  {
  #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
    /* mingw lseek mistakenly succeeds on pipes, sockets, and terminals.  */
    HANDLE h = (HANDLE) _get_osfhandle (fd);
    if (h == INVALID_HANDLE_VALUE)
      {
        errno = EBADF;
        return -1;
      }
    if (GetFileType (h) != FILE_TYPE_DISK)
      {
        errno = ESPIPE;
        return -1;
      }
  #else
    /* BeOS lseek mistakenly succeeds on pipes...  */
    struct stat statbuf;
    if (fstat (fd, &statbuf) < 0)
      return -1;
    if (!S_ISREG (statbuf.st_mode))
      {
        errno = ESPIPE;
        return -1;
      }
  #endif
  #if _GL_WINDOWS_64_BIT_OFF_T
    return _lseeki64 (fd, offset, whence);
  #else
    return lseek (fd, offset, whence);
  #endif
  }
  

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