libexplain: libexplain/is_same

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00001 /*
00002  * libexplain - Explain errno values returned by libc functions
00003  * Copyright (C) 2008, 2009, 2013 Peter Miller
00004  * Written by Peter Miller <pmiller@opensource.org.au>
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU Lesser General Public License as published by
00008  * the Free Software Foundation; either version 3 of the License, or (at
00009  * your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public License
00017  * along with this program. If not, see <http://www.gnu.org/licenses/>.
00018  */
00019 
00020 #include <libexplain/ac/sys/stat.h>
00021 
00022 #include <libexplain/is_same_inode.h>
00023 
00024 
00025 int
00026 explain_is_same_inode(const struct stat *st1, const struct stat *st2)
00027 {
00028     int             t1;
00029     int             t2;
00030 
00031     t1 = st1->st_mode & S_IFMT;
00032     t2 = st2->st_mode & S_IFMT;
00033     if (t1 != t2)
00034         return 0;
00035     switch (t1)
00036     {
00037     case S_IFBLK:
00038     case S_IFCHR:
00039         return (st1->st_rdev == st2->st_rdev);
00040 
00041     default:
00042         break;
00043     }
00044     return (st1->st_dev == st2->st_dev && st1->st_ino == st2->st_ino);
00045 }
00046 
00047 
00048 /* vim: set ts=8 sw=4 et : */