glibc/posix/fpathconf.c

/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <stddef.h>
#include <unistd.h>


/* Get file-specific information about descriptor FD.  */
long int
__fpathconf (int fd, int name)
{
  if (fd < 0)
    {
      __set_errno (EBADF);
      return -1;
    }

  switch (name)
    {
    default:
      __set_errno (EINVAL);
      return -1;

    case _PC_LINK_MAX:
    case _PC_MAX_CANON:
    case _PC_MAX_INPUT:
    case _PC_NAME_MAX:
    case _PC_PATH_MAX:
    case _PC_PIPE_BUF:
    case _PC_SOCK_MAXBUF:
    case _PC_CHOWN_RESTRICTED:
    case _PC_NO_TRUNC:
    case _PC_VDISABLE:
      break;
    }

  __set_errno (ENOSYS);
  return -1;
}

weak_alias (__fpathconf, fpathconf)

stub_warning (fpathconf)