38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/* Query filename corresponding to an open FD. Linux version.
|
|
Copyright (C) 2001-2018 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 <sys/stat.h>
|
|
#include <string.h>
|
|
#include <_itoa.h>
|
|
|
|
#define FD_TO_FILENAME_SIZE ((sizeof ("/proc/self/fd/") - 1) \
|
|
+ (sizeof ("4294967295") - 1) + 1)
|
|
|
|
static inline const char *
|
|
fd_to_filename (unsigned int fd, char *buf)
|
|
{
|
|
*_fitoa_word (fd, __stpcpy (buf, "/proc/self/fd/"), 10, 0) = '\0';
|
|
|
|
/* We must make sure the file exists. */
|
|
struct stat64 st;
|
|
if (__lxstat64 (_STAT_VER, buf, &st) < 0)
|
|
/* /proc is not mounted or something else happened. */
|
|
return NULL;
|
|
return buf;
|
|
}
|