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37 lines
743 B
C
37 lines
743 B
C
#include <stdlib.h>
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#include "libmap.h"
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int map_update_checksum(map_t *map, int driver_number)
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{
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char *driver;
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int blocksize;
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int block;
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int part;
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int length, checksum;
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int ret;
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driver = map_read_driver(map, driver_number);
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if (driver == NULL)
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return -1;
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blocksize = map_get_blocksize(map);
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block = read_long((u_int32_t*)&map->drivers.DrvInfo[driver_number].Block);
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part = map_seek_driver_partition(map, block * blocksize / 512);
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map_read(map, part);
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length = read_long((u_int32_t*)&map->partition.BootSize);
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checksum = map_checksum((unsigned char*)driver, length);
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write_long((u_int32_t*)&map->partition.BootCksum, checksum);
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free(driver);
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ret = map_write(map, part);
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if (ret != part)
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return -1;
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return 0;
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}
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