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57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* help detect directory cycles efficiently
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Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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/* Written by Jim Meyering */
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#ifndef CYCLE_CHECK_H
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# define CYCLE_CHECK_H 1
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# if HAVE_INTTYPES_H
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# include <inttypes.h>
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# endif
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# if HAVE_STDINT_H
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# include <stdint.h>
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# endif
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# include <stdbool.h>
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# include "dev-ino.h"
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# include "same-inode.h"
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struct cycle_check_state
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{
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struct dev_ino dev_ino;
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uintmax_t chdir_counter;
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int magic;
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};
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void cycle_check_init (struct cycle_check_state *state);
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bool cycle_check (struct cycle_check_state *state, struct stat const *sb);
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# define CYCLE_CHECK_REFLECT_CHDIR_UP(State, SB_dir, SB_subdir) \
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do \
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{ \
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if (SAME_INODE ((State)->dev_ino, SB_subdir)) \
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{ \
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(State)->dev_ino.st_dev = (SB_dir).st_dev; \
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(State)->dev_ino.st_ino = (SB_dir).st_ino; \
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} \
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} \
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while (0)
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#endif
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