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65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
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/* Copyright (C) 1991, 1995, 1996, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <limits.h>
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#include <sys/statfs.h>
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#define EXT2_SUPER_MAGIC 0xef53
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#define UFS_MAGIC 0x00011954
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#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */
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static long int default_fpathconf (int fd, int name);
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/* Get file-specific information about descriptor FD. */
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long int
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__fpathconf (fd, name)
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int fd;
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int name;
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{
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if (fd < 0)
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{
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__set_errno (EBADF);
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return -1;
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}
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if (name == _PC_FILESIZEBITS)
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{
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/* Test whether this is on a ext2 filesystem which supports large
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files. */
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struct statfs fs;
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if (__fstatfs (fd, &fs) < 0
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|| (fs.f_type != EXT2_SUPER_MAGIC
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&& fs.f_type != UFS_MAGIC
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&& fs.f_type != UFS_CIGAM))
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return 32;
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/* This filesystem supported files >2GB. */
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return 64;
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}
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/* Fallback to the generic version. */
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return default_fpathconf (fd, name);
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}
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#define __fpathconf static default_fpathconf
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#include <sysdeps/posix/fpathconf.c>
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