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ea8c7ac7d0
This is a greatly pared down version of the full gdb-4.12, all the config stuff has been removed and the supporting libraries have been stripped to a minimum. This is a 1.1.5 only port, I'll do a more complete port for 2.0 which will have all the config stuff and will install the gnu support libraries as system libraries like we do for readline. There wasn't much point for 1.1.5 since only gdb would use them so I went for saving space instead. For 2.0 I'll config all the other gnu tools to use them as well.
72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* Compare two open file descriptors to see if they refer to the same file.
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Copyright (C) 1991 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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NAME
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fdmatch -- see if two file descriptors refer to same file
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SYNOPSIS
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int fdmatch (int fd1, int fd2)
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DESCRIPTION
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Check to see if two open file descriptors refer to the same file.
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This is useful, for example, when we have an open file descriptor
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for an unnamed file, and the name of a file that we believe to
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correspond to that fd. This can happen when we are exec'd with
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an already open file (stdout for example) or from the SVR4 /proc
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calls that return open file descriptors for mapped address spaces.
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All we have to do is open the file by name and check the two file
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descriptors for a match, which is done by comparing major&minor
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device numbers and inode numbers.
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BUGS
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(FIXME: does this work for networks?)
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It works for NFS, which assigns a device number to each mount.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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int fdmatch (fd1, fd2)
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int fd1;
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int fd2;
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{
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struct stat sbuf1;
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struct stat sbuf2;
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if ((fstat (fd1, &sbuf1) == 0) &&
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(fstat (fd2, &sbuf2) == 0) &&
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(sbuf1.st_dev == sbuf2.st_dev) &&
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(sbuf1.st_ino == sbuf2.st_ino))
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{
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return (1);
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}
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else
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{
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return (0);
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}
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}
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