mirror of https://github.com/vivier/EMILE.git
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
static __attribute__((used)) char* rcsid = "$CVSHeader$";
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/*
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*
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* (c) 2004-2006 Laurent Vivier <Laurent@Vivier.EU>
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*
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "libemile.h"
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#include "emile.h"
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int emile_first_set_param_scsi_extents( int fd, int drive_num, int second_offset, int size, int blocksize)
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{
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int ret;
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char first[1024];
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int current;
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/* unsigned short max_blocks; */
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int location;
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location = lseek(fd, 0, SEEK_CUR);
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if (location == -1)
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return EEMILE_CANNOT_READ_FIRST;
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ret = read(fd, first, 1024);
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if (ret == -1)
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return EEMILE_CANNOT_READ_FIRST;
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/* max_blocks = read_short((u_int16_t*)&first[1022]) / 6; */
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write_short((u_int16_t*)&first[1014], blocksize);
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write_short((u_int16_t*)&first[1016], drive_num);
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write_long((u_int32_t*)&first[1018], 0);
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current = 1014;
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current -= 2;
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write_short((u_int16_t*)&first[current], (size + blocksize - 1) / blocksize);
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current -= 4;
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write_long((u_int32_t*)&first[current], second_offset);
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/* mark end of blocks list */
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current -= 2;
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write_short((u_int16_t*)(&first[current]), 0);
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/* set second level size */
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write_long((u_int32_t*)&first[1018], (size + blocksize - 1) / blocksize * blocksize);
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ret = lseek(fd, location, SEEK_SET);
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if (ret != location)
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return EEMILE_CANNOT_WRITE_FIRST;
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ret = write(fd, first, 1024);
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if (ret == -1)
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return EEMILE_CANNOT_WRITE_FIRST;
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return 0;
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}
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