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-rw-r--r--libiberty/fdmatch.c73
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diff --git a/libiberty/fdmatch.c b/libiberty/fdmatch.c
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--- a/libiberty/fdmatch.c
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-/* Compare two open file descriptors to see if they refer to the same file.
- Copyright (C) 1991 Free Software Foundation, Inc.
-
-This file is part of the libiberty library.
-Libiberty is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public
-License as published by the Free Software Foundation; either
-version 2 of the License, or (at your option) any later version.
-
-Libiberty 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
-Library General Public License for more details.
-
-You should have received a copy of the GNU Library General Public
-License along with libiberty; see the file COPYING.LIB. If
-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-
-/*
-
-NAME
-
- fdmatch -- see if two file descriptors refer to same file
-
-SYNOPSIS
-
- int fdmatch (int fd1, int fd2)
-
-DESCRIPTION
-
- Check to see if two open file descriptors refer to the same file.
- This is useful, for example, when we have an open file descriptor
- for an unnamed file, and the name of a file that we believe to
- correspond to that fd. This can happen when we are exec'd with
- an already open file (stdout for example) or from the SVR4 /proc
- calls that return open file descriptors for mapped address spaces.
- All we have to do is open the file by name and check the two file
- descriptors for a match, which is done by comparing major&minor
- device numbers and inode numbers.
-
-BUGS
-
- (FIXME: does this work for networks?)
- It works for NFS, which assigns a device number to each mount.
-
-*/
-
-#include "ansidecl.h"
-#include "libiberty.h"
-#include <sys/types.h>
-#include <sys/stat.h>
-
-int fdmatch (fd1, fd2)
- int fd1;
- int fd2;
-{
- struct stat sbuf1;
- struct stat sbuf2;
-
- if ((fstat (fd1, &sbuf1) == 0) &&
- (fstat (fd2, &sbuf2) == 0) &&
- (sbuf1.st_dev == sbuf2.st_dev) &&
- (sbuf1.st_ino == sbuf2.st_ino))
- {
- return (1);
- }
- else
- {
- return (0);
- }
-}