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Traditionally, fsck is invoked before the filesystems are mounted and all checks are done to completion at that time. If background checking is available, fsck is invoked twice. It is first invoked at the traditional time, before the filesystems are mounted, with the -F flag to do checking on all the filesystems that cannot do background checking. It is then invoked a second time, after the system has completed going multiuser, with the -B flag to do checking on all the filesystems that can do background checking. Unlike the foreground checking, the background checking is started asynchonously so that other system activity can proceed even on the filesystems that are being checked. At the moment, only the fast filesystem supports background checking. To be able to do background checking, a filesystem must have been running with soft updates, not have been marked as needing a foreground check, and be mounted and writable when the background check is to be done (i.e., not listed as `noauto' in /etc/fstab). These changes are the final piece needed to support background filesystem checking. They will not have any effect until you update your /etc/rc to invoke fsck in its new mode of operation. I am still playing around with exactly what those changes should be and should be committing them later this week.
66 lines
2.8 KiB
C
66 lines
2.8 KiB
C
/* $NetBSD: fsutil.h,v 1.4 1998/07/26 20:02:36 mycroft Exp $ */
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/*
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* Copyright (c) 1996 Christos Zoulas. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christos Zoulas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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void perror __P((const char *));
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void errexit __P((const char *, ...))
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__attribute__((__noreturn__,__format__(__printf__,1,2)));
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void pfatal __P((const char *, ...))
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__attribute__((__format__(__printf__,1,2)));
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void pwarn __P((const char *, ...))
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__attribute__((__format__(__printf__,1,2)));
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void panic __P((const char *, ...))
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__attribute__((__noreturn__,__format__(__printf__,1,2)));
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const char *rawname __P((const char *));
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const char *unrawname __P((const char *));
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#if 0
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const char *blockcheck __P((const char *));
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#endif
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const char *devcheck __P((const char *));
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const char *cdevname __P((void));
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void setcdevname __P((const char *, int));
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struct statfs *getmntpt __P((const char *));
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int hotroot __P((void));
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void *emalloc __P((size_t));
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void *erealloc __P((void *, size_t));
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char *estrdup __P((const char *));
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#define CHECK_PREEN 0x0001
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#define CHECK_VERBOSE 0x0002
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#define CHECK_DEBUG 0x0004
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#define CHECK_BACKGRD 0x0008
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#define DO_BACKGRD 0x0010
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struct fstab;
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int checkfstab __P((int, int (*)(struct fstab *),
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int (*) (const char *, const char *, const char *, char *, pid_t *)));
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