sysdeps/unix/sysv/linux/fpathconf.c

   1 /* Get file-specific information about descriptor FD.  Linux version.
   2    Copyright (C) 1991,1995,1996,1998-2003,2008,2010
   3    Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <fcntl.h>
  22 #include "pathconf.h"
  23
  24 static long int posix_fpathconf (int fd, int name);
  25
  26 /* Define this first, so it can be inlined.  */
  27 #define __fpathconf static posix_fpathconf
  28 #include <sysdeps/posix/fpathconf.c>
  29
  30
  31 /* Get file-specific information about descriptor FD.  */
  32 long int
  33 __fpathconf (fd, name)
  34      int fd;
  35      int name;
  36 {
  37   struct statfs fsbuf;
  38   int r;
  39
  40   switch (name)
  41     {
  42     case _PC_LINK_MAX:
  43       return __statfs_link_max (__fstatfs (fd, &fsbuf), &fsbuf);
  44
  45     case _PC_FILESIZEBITS:
  46       return __statfs_filesize_max (__fstatfs (fd, &fsbuf), &fsbuf);
  47
  48     case _PC_2_SYMLINKS:
  49       return __statfs_symlinks (__fstatfs (fd, &fsbuf), &fsbuf);
  50
  51     case _PC_CHOWN_RESTRICTED:
  52       return __statfs_chown_restricted (__fstatfs (fd, &fsbuf), &fsbuf);
  53
  54     case _PC_PIPE_BUF:
  55       r = __fcntl (fd, F_GETPIPE_SZ);
  56       if (r > 0)
  57         return r;
  58       /* FALLTHROUGH */
  59
  60     default:
  61       return posix_fpathconf (fd, name);
  62     }
  63 }