b52f85e743
not know of any software using them, and there is no "published API" for libufs, as it were.
136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
/*
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* Copyright (c) 2002 Juli Mallett. All rights reserved.
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*
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* This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
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* FreeBSD project. Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistribution 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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*
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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
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __LIBUFS_H__
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#define __LIBUFS_H__
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/*
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* libufs macros (internal, non-exported).
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*/
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#ifdef _LIBUFS
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#ifdef _LIBUFS_DEBUGGING
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/*
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* Trace steps through libufs, to be used at entry and erroneous return.
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*/
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#define ERROR(uufsd, str) \
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do { \
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fprintf(stderr, "libufs in %s", __func__); \
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if (str != NULL) \
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fprintf(stderr, ": %s", str); \
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if (errno) \
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fprintf(stderr, ": %s", strerror(errno)); \
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fprintf(stderr, "\n"); \
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if ((uufsd) != NULL) \
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(uufsd)->d_error = str; \
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} while (0)
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#else /* _LIBUFS_DEBUGGING */
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#define ERROR(uufsd, str) \
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do { \
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if ((uufsd) != NULL) \
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(uufsd)->d_error = str; \
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} while (0)
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#endif /* _LIBUFS_DEBUGGING */
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#endif /* _LIBUFS */
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/*
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* libufs structures.
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*/
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/*
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* userland ufs disk.
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*/
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struct uufsd {
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const char *d_name; /* disk name */
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int d_ufs; /* decimal UFS version */
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int d_fd; /* raw device file descriptor */
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long d_bsize; /* device bsize */
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ufs2_daddr_t d_sblock; /* superblock location */
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caddr_t d_inoblock; /* inode block */
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ino_t d_inomin; /* low inode */
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ino_t d_inomax; /* high inode */
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union {
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struct fs d_fs; /* filesystem information */
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char d_sb[MAXBSIZE];
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/* superblock as buffer */
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} d_sbunion;
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union {
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struct cg d_cg; /* cylinder group */
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char d_buf[MAXBSIZE];
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/* cylinder group storage */
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} d_cgunion;
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int d_ccg; /* current cylinder group */
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int d_lcg; /* last cylinder group (in d_cg) */
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const char *d_error; /* human readable disk error */
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int d_mine; /* internal flags */
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#define d_fs d_sbunion.d_fs
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#define d_sb d_sbunion.d_sb
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#define d_cg d_cgunion.d_cg
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};
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__BEGIN_DECLS
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/*
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* libufs prototypes.
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*/
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/*
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* block.c
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*/
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ssize_t bread(struct uufsd *, ufs2_daddr_t, void *, size_t);
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ssize_t bwrite(struct uufsd *, ufs2_daddr_t, const void *, size_t);
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/*
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* cgroup.c
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*/
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int cgread(struct uufsd *);
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int cgread1(struct uufsd *, int);
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/*
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* inode.c
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*/
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int getino(struct uufsd *, void **, ino_t, int *);
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/*
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* sblock.c
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*/
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int sbread(struct uufsd *);
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int sbwrite(struct uufsd *, int);
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/*
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* type.c
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*/
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int ufs_disk_close(struct uufsd *);
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int ufs_disk_fillout(struct uufsd *, const char *);
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int ufs_disk_fillout_blank(struct uufsd *, const char *);
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int ufs_disk_write(struct uufsd *);
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__END_DECLS
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#endif /* __LIBUFS_H__ */
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