sysdeps/generic/fd_to_filename.h

   1 /* Query filename corresponding to an open FD.
   2    Copyright (C) 2001-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _FD_TO_FILENAME_H
  20 #define _FD_TO_FILENAME_H
  21
  22 #include <arch-fd_to_filename.h>
  23 #include <intprops.h>
  24
  25 struct fd_to_filename
  26 {
  27   /* A positive int value has at most 10 decimal digits.  */
  28   char buffer[sizeof (FD_TO_FILENAME_PREFIX) + INT_STRLEN_BOUND (int)];
  29 };
  30
  31 /* Writes a /proc/self/fd-style path for DESCRIPTOR to *STORAGE and
  32    returns a pointer to the start of the string.  DESCRIPTOR must be
  33    non-negative.  */
  34 char *__fd_to_filename (int descriptor, struct fd_to_filename *storage)
  35   attribute_hidden;
  36
  37 #endif /* _FD_TO_FILENAME_H */