62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
/////////////////////////////////////////////////////////////////////////
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// $Id: cdrom_beos.cc,v 1.3 2008-01-26 22:24:00 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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#include <SupportDefs.h>
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#include <Drivers.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include "cdrom_beos.h"
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int
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GetLogicalBlockSize(int fd)
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{
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partition_info p_info;
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if (ioctl(fd, B_GET_PARTITION_INFO, &p_info) == B_NO_ERROR)
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{
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//dprintf("GetLogicalBlockSize: ioctl suceed\n");
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return p_info.logical_block_size;
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}
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else //dprintf("GetLogicalBlockSize = ioctl returned error\n");
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return 0;
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}
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int
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GetDeviceBlockSize(int fd)
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{
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struct stat st;
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device_geometry dg;
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if (ioctl(fd, B_GET_GEOMETRY, &dg) < 0)
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{
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if (fstat(fd, &st) < 0 || S_ISDIR(st.st_mode))
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return 0;
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return 512; /* just assume it's a plain old file or something */
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}
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return dg.bytes_per_sector;
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}
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off_t
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GetNumDeviceBlocks(int fd, int block_size)
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{
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struct stat st;
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device_geometry dg;
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if (ioctl(fd, B_GET_GEOMETRY, &dg) >= 0)
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{
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return (off_t)dg.cylinder_count *
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(off_t)dg.sectors_per_track *
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(off_t)dg.head_count;
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}
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/* if the ioctl fails, try just stat'ing in case it's a regular file */
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if (fstat(fd, &st) < 0)
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return 0;
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return st.st_size / block_size;
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}
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