1 /* Determine whether descriptor has given property.
2    Copyright (C) 1996-2022 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 <errno.h>
20 #include <sys/stat.h>
21 #include <sys/socket.h>
22 #include <sys/types.h>
23 
24 int
isfdtype(int fildes,int fdtype)25 isfdtype (int fildes, int fdtype)
26 {
27   struct __stat64_t64 st;
28   int result;
29 
30   {
31     int save_error = errno;
32     result = __fstat64_time64 (fildes, &st);
33     __set_errno (save_error);
34   }
35 
36   return result ?: (st.st_mode & S_IFMT) == (mode_t) fdtype;
37 }
38