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1. Don't use the MSDOSFS code for accessing FreeBSD distribution data. Use Robert Nordier's stand-alone DOS I/O library for the purpose. It this works as well as Robert says it does, it should drastically reduce (or even eliminate) our "I can't install from my DOS partition!" calls. 2. As a result of the above, go to stdio file descriptors for all media types. 3. Taking advantage of #2, start using libftpio for FTP transfers instead of maintaining our own parallel version of the FTP transfer code. Yay! I ripped something out for a change! #1 Submitted-By: Robert Nordier <rnordier@iafrica.com>
119 lines
4.3 KiB
C
119 lines
4.3 KiB
C
/*
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* Copyright (c) 1996 Robert Nordier
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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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* OR 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(S) 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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#ifndef DOSIO_H
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#define DOSIO_H
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/*
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* DOS file attributes
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*/
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#define FA_RDONLY 0x01 /* read-only */
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#define FA_HIDDEN 0x02 /* hidden file */
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#define FA_SYSTEM 0x04 /* system file */
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#define FA_LABEL 0x08 /* volume label */
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#define FA_DIR 0x10 /* directory */
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#define FA_ARCH 0x20 /* archive (file modified) */
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/*
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* Error number to overload if filesystem errors are detected during
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* routine processing
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*/
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#define EBADFS EINVAL
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/*
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* Macros to convert DOS-format 16-bit and 32-bit quantities
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*/
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#define cv2(p) ((u_short)(p)[0] | \
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((u_short)(p)[1] << 010))
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#define cv4(p) ((u_long)(p)[0] | \
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((u_long)(p)[1] << 010) | \
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((u_long)(p)[2] << 020) | \
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((u_long)(p)[3] << 030))
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/*
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* DOS directory structure
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*/
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typedef struct {
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u_char name[8]; /* name */
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u_char ext[3]; /* extension */
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u_char attr; /* attributes */
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u_char reserved[10]; /* reserved */
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u_char time[2]; /* time */
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u_char date[2]; /* date */
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u_char clus[2]; /* starting cluster */
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u_char size[4]; /* file size */
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} DOS_DE;
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typedef struct {
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u_char *fat; /* FAT */
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u_long volid; /* volume id */
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u_long lsnfat; /* logical sector number: fat */
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u_long lsndir; /* logical sector number: dir */
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u_long lsndta; /* logical sector number: data area */
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short fd; /* file descriptor */
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short fat12; /* 12-bit FAT entries */
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u_short spf; /* sectors per fat */
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u_short dirents; /* root directory entries */
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u_short spc; /* sectors per cluster */
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u_short xclus; /* maximum cluster number */
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u_short bsize; /* cluster size in bytes */
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u_short bshift; /* cluster conversion shift */
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u_short links; /* active links to structure */
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} DOS_FS;
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typedef struct {
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DOS_FS *fs; /* associated filesystem */
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DOS_DE de; /* directory entry */
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u_long offset; /* current offset */
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u_short c; /* last cluster read */
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} DOS_FILE;
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/*
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* The following variable can be set to the address of an error-handling
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* routine which will be invoked when a read() returns EIO. The handler
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* should return 1 to retry the read, otherwise 0.
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*/
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extern int (*dos_ioerr)(int op);
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int dos_mount(DOS_FS *fs, const char *devname);
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int dos_unmount(DOS_FS *fs);
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u_long dos_free(DOS_FS *fs);
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FILE *dos_open(DOS_FS *fs, const char *path);
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int dos_close(void *v);
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fpos_t dos_seek(void *v, fpos_t offset, int whence);
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int dos_read(void *v, char *buf, int nbytes);
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int dos_stat(DOS_FS *fs, const char *path, struct stat *sb);
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int dos_fstat(DOS_FILE *f, struct stat *sb);
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void dos_cvtime(time_t *timer, u_short ddate, u_short dtime);
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#endif /* !DOSIO_H */
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