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/* Query filename corresponding to an open FD. Linux version.
Copyright (C) 2001-2016 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
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <_itoa.h>
static inline const char *
fd_to_filename (int fd)
{
char *ret = malloc (30);
if (ret != NULL)
{
struct stat64 st;
*_fitoa_word (fd, __stpcpy (ret, "/proc/self/fd/"), 10, 0) = '\0';
/* We must make sure the file exists. */
if (__lxstat64 (_STAT_VER, ret, &st) < 0)
{
/* /proc is not mounted or something else happened. Don't
return the file name. */
free (ret);
ret = NULL;
}
}
return ret;
}
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