EMILE/libemile/emile_first_set_param.c

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static __attribute__((used)) char* rcsid = "$CVSHeader$";
/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include "libemile.h"
#include "emile.h"
#include "bootblock.h"
int emile_first_set_param(int fd, unsigned short tune_mask, int drive_num,
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int second_offset, int second_size)
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{
eBootBlock_t firstBlock;
int ret;
off_t location;
location = lseek(fd, 0, SEEK_CUR);
if (location == -1)
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return EEMILE_CANNOT_READ_FIRST;
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ret = read(fd, &firstBlock, sizeof(firstBlock));
if (ret != sizeof(firstBlock))
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return EEMILE_CANNOT_READ_FIRST;
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if ( strncmp( firstBlock.boot_block_header.SysName+1,
"Mac Bootloader", 14) == 0 )
{
if (tune_mask & EMILE_FIRST_TUNE_DRIVE)
write_short(&firstBlock.second_param_block.ioVRefNum,
drive_num);
if (tune_mask & EMILE_FIRST_TUNE_OFFSET)
write_long(&firstBlock.second_param_block.ioPosOffset,
second_offset);
if (tune_mask & EMILE_FIRST_TUNE_SIZE)
write_long(&firstBlock.second_param_block.ioReqCount,
second_size);
ret = lseek(fd, location, SEEK_SET);
if (ret != 0)
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return EEMILE_CANNOT_WRITE_FIRST;
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ret = write(fd, &firstBlock, sizeof(firstBlock));
if (ret != sizeof(firstBlock))
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return EEMILE_CANNOT_WRITE_FIRST;
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}
else
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return EEMILE_UNKNOWN_FIRST;
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return 0;
}