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30 lines
594 B
C
30 lines
594 B
C
#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#define SECTOR_SIZE (2048)
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#define ISO_BLOCKS(X) (((X) / SECTOR_SIZE) + (((X)%SECTOR_SIZE)?1:0))
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static const char *filename = "/dev/cdrom";
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static FILE *infile = NULL;
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int iso9660_device_open(void)
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{
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infile = fopen(filename, "rb");
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if (infile == NULL)
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return -1;
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return 0;
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}
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void iso9660_device_close(void)
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{
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if (infile)
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fclose(infile);
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}
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void iso9660_device_read(off_t offset, void* buffer, size_t size)
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{
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lseek(fileno(infile), offset << 11, SEEK_SET);
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read(fileno(infile), buffer, ISO_BLOCKS(size) << 11);
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}
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