1/* Construct a pathname under /proc/self/fd (or /dev/fd for Hurd).
2 Copyright (C) 2020-2023 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#include <fd_to_filename.h>
20
21#include <assert.h>
22#include <string.h>
23#include <_itoa.h>
24
25char *
26__fd_to_filename (int descriptor, struct fd_to_filename *storage)
27{
28 assert (descriptor >= 0);
29
30 char *p = mempcpy (storage->buffer, FD_TO_FILENAME_PREFIX,
31 strlen (FD_TO_FILENAME_PREFIX));
32 *_fitoa_word (descriptor, p, 10, 0) = '\0';
33
34 return storage->buffer;
35}
36