1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
/* Copyright (C) 1994, 1997, 2000 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static int
check (const char *name, FILE *stream, int fd)
{
int sfd = fileno (stream);
printf ("(fileno (%s) = %d) %c= %d\n", name, sfd,
sfd == fd ? '=' : '!', fd);
return sfd != fd;
}
int
main (void)
{
return (check ("stdin", stdin, STDIN_FILENO) ||
check ("stdout", stdout, STDOUT_FILENO) ||
check ("stderr", stderr, STDERR_FILENO));
}
|
