posix/fpathconf.c

   1 /* Copyright (C) 1991-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <stddef.h>
  20 #include <unistd.h>
  21
  22
  23 /* Get file-specific information about descriptor FD.  */
  24 long int
  25 __fpathconf (int fd, int name)
  26 {
  27   if (fd < 0)
  28     {
  29       __set_errno (EBADF);
  30       return -1;
  31     }
  32
  33   switch (name)
  34     {
  35     default:
  36       __set_errno (EINVAL);
  37       return -1;
  38
  39     case _PC_LINK_MAX:
  40     case _PC_MAX_CANON:
  41     case _PC_MAX_INPUT:
  42     case _PC_NAME_MAX:
  43     case _PC_PATH_MAX:
  44     case _PC_PIPE_BUF:
  45     case _PC_SOCK_MAXBUF:
  46     case _PC_CHOWN_RESTRICTED:
  47     case _PC_NO_TRUNC:
  48     case _PC_VDISABLE:
  49       break;
  50     }
  51
  52   __set_errno (ENOSYS);
  53   return -1;
  54 }
  55
  56 weak_alias (__fpathconf, fpathconf)
  57
  58 stub_warning (fpathconf)