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/* |
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* libhfsp - library for reading and writing Macintosh HFS+ volumes |
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* |
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* Copyright (C) 2000-2001 Klaus Halfmann <klaus.halfmann@t-online.de> |
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* Original Copyright (C) 1996-1998 Robert Leslie |
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* Additional work in 2004 by Stefan Weyergraf for use in PearPC |
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* |
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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 of the License, or |
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* (at your option) any later version. |
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* |
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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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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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# ifdef HAVE_CONFIG_H |
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# include "config.h" |
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# endif |
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|
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#define _FILE_OFFSET_BITS 64 |
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|
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//# ifdef HAVE_FCNTL_H |
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# if 1 |
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# include <fcntl.h> |
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# else |
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int open(const char *, int, ...); |
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int fcntl(int, int, ...); |
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# endif |
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|
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//# ifdef HAVE_UNISTD_H |
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# if 1 |
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# include <unistd.h> |
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# else |
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int close(int); |
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off_t lseek(int, off_t, int); |
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size_t read(int, void *, size_t); |
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size_t write(int, const char *, size_t); |
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int stat(const char *, struct stat *); |
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int fstat(int, struct stat *); |
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# endif |
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|
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# include <stdio.h> |
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|
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# include <errno.h> |
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# include <sys/stat.h> |
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// need BLKGETSIZE ioctl call |
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// # include <linux/fs.h> |
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|
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extern "C" { |
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# include "libhfsp.h" |
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# include "os.h" |
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} |
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#include "../hfsplusglue.h" |
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#include "tools/except.h" |
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|
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/** Offset that is silently used by os_seek. |
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* Nedded to transparaently support things like partitions */ |
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/*APPLEUInt64 os_offset;*/ |
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extern "C" uint64 hfsp_get_offset(void **priv) |
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{ |
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hfsplus_devicehandle_s *dh = (hfsplus_devicehandle_s *)*priv; |
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return dh->mStart; |
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} |
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|
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extern "C" void hfsp_set_offset(void **priv, uint64 ofs) |
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{ |
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hfsplus_devicehandle_s *dh = (hfsplus_devicehandle_s *)*priv; |
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dh->mStart = ofs; |
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} |
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|
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/* |
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* NAME: os->open() |
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* DESCRIPTION: open and lock a new descriptor from the given path and mode |
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*/ |
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#if 0 |
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int os_open(void **priv, const char *path, int mode) |
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{ |
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int fd; |
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struct flock lock; |
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int c; |
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|
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switch (mode) |
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{ |
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case HFSP_MODE_RDONLY: |
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mode = O_RDONLY; |
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break; |
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|
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case HFSP_MODE_RDWR: |
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default: |
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fprintf(stderr,"*** Warning: You are about to open '%s' " |
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"for writing ***\n", path); |
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fprintf(stderr,"*** Do you really want to do that ? (y/n) ***\n"); |
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do |
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c = getchar(); |
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while (c != 'y' && c != 'n'); |
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if (c != 'y') |
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exit(1); |
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mode = O_RDWR; |
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break; |
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} |
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|
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|
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fd = open(path, mode); |
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if (fd == -1) |
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HFSP_ERROR(errno, "error opening medium"); |
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|
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/* lock descriptor against concurrent access */ |
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|
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lock.l_type = (mode == O_RDONLY) ? F_RDLCK : F_WRLCK; |
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lock.l_start = 0; |
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lock.l_whence = SEEK_SET; |
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lock.l_len = 0; |
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|
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if (fcntl(fd, F_SETLK, &lock) == -1 && |
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(errno == EACCES || errno == EAGAIN)) |
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HFSP_ERROR(EAGAIN, "unable to obtain lock for medium"); |
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|
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*priv = (void *) fd; |
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|
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return 0; |
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|
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fail: |
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if (fd != -1) |
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close(fd); |
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|
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return -1; |
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} |
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#endif |
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extern "C" int hfsp_os_open(void **priv, const void *devicehandle, int mode) |
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{ |
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hfsplus_devicehandle_s *dh = (hfsplus_devicehandle_s *)devicehandle; |
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*priv = dh; |
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return 0; |
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} |
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|
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/* |
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* NAME: os->close() |
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* DESCRIPTION: close an open descriptor |
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*/ |
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extern "C" int hfsp_os_close(void **priv) |
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{ |
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#if 0 |
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int fd = (int) *priv; |
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|
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*priv = (void *) -1; |
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|
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if (close(fd) == -1) |
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HFSP_ERROR(errno, "error closing medium"); |
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|
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return 0; |
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|
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fail: |
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return -1; |
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#endif |
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return 0; |
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} |
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|
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/* |
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* NAME: os->same() |
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* DESCRIPTION: return 1 iff path is same as the open descriptor |
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*/ |
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extern "C" int hfsp_os_same(void **priv, const char *path) |
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{ |
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#if 0 |
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int fd = (int) *priv; |
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struct stat fdev, dev; |
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|
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if (fstat(fd, &fdev) == -1 || |
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stat(path, &dev) == -1) |
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HFSP_ERROR(errno, "can't get path information"); |
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|
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return fdev.st_dev == dev.st_dev && |
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fdev.st_ino == dev.st_ino; |
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|
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fail: |
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return -1; |
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#endif |
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return 0; |
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} |
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|
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/* |
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* NAME: os->seek() |
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* DESCRIPTION: set a descriptor's seek pointer (offset in blocks) and returns |
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* this offset if everything went well |
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*/ |
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#if 0 |
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unsigned long os_seek(void **priv, unsigned long offset, int blksize_bits) |
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{ |
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int fd = (int) *priv; |
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off_t result, where = offset; |
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|
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where = os_offset + (where << blksize_bits); |
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result = lseek(fd, where, SEEK_SET) - os_offset; |
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|
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result = result >> blksize_bits; |
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return (unsigned long) result; |
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} |
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#endif |
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|
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extern "C" uint64 hfsp_os_seek(void **priv, uint64 offset, int blksize_bits) |
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{ |
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hfsplus_devicehandle_s *dh = (hfsplus_devicehandle_s *)*priv; |
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try { |
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FileOfs s = dh->mStart + (offset << blksize_bits); |
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dh->mDevice->seek(s); |
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} catch (const IOException &x) { |
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return (uint64)-1; |
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} |
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// FileOfs t = dh->mDevice->tell(); |
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uint64 result = (dh->mDevice->tell() - dh->mStart) >> blksize_bits; |
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return result; |
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} |
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|
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/* |
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* NAME: os->read() |
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* DESCRIPTION: read blocks from an open descriptor |
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* |
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* @param **priv is a pointer to the file descriptor |
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* @param *buf buffer to put the content in |
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* @param len number of buffers to read |
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* @param blksize_bits blocksize as a power of 2 (e.g. 9 for 512) |
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* |
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* @return number of read blocks or -1 on error |
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*/ |
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#if 0 |
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unsigned long os_read(void **priv, void *buf, unsigned long len, int blksize_bits) |
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{ |
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int fd = (int) *priv; |
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size_t result= 0; |
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int num= len << blksize_bits; |
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|
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while( result< num) { |
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size_t size = read(fd, &((char *)buf)[ result], num- result); |
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if (size <= 0) /* EOF == 0 should not happen, too */ |
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HFSP_ERROR(errno, "error reading from medium"); |
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result += size; |
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} |
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return (unsigned long) result >> blksize_bits; |
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|
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fail: |
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return -1; |
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} |
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#endif |
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|
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extern "C" unsigned long hfsp_os_read(void **priv, void *buf, unsigned long len, int blksize_bits) |
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{ |
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hfsplus_devicehandle_s *dh = (hfsplus_devicehandle_s *)*priv; |
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return dh->mDevice->read(buf, len << blksize_bits) >> blksize_bits; |
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} |
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|
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/* |
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* NAME: os->write() |
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* DESCRIPTION: write blocks to an open descriptor |
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*/ |
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#if 0 |
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unsigned long os_write(void **priv, const void *buf, unsigned long len, int blksize_bits) |
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{ |
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int fd = (int) *priv; |
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size_t result; |
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|
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result = write(fd, buf, len << blksize_bits); |
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|
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if (result == -1) |
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HFSP_ERROR(errno, "error writing to medium"); |
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|
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return (unsigned long) result >> blksize_bits; |
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|
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fail: |
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return -1; |
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} |
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#endif |
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|
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extern "C" unsigned long hfsp_os_write(void **priv, const void *buf, unsigned long len, int blksize_bits) |
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{ |
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hfsplus_devicehandle_s *dh = (hfsplus_devicehandle_s *)*priv; |
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return dh->mDevice->write(buf, len << blksize_bits) >> blksize_bits; |
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} |
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