mirror of https://github.com/vivier/EMILE.git
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
static __attribute__((used)) char* rcsid = "$CVSHeader$";
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/*
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*
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* (c) 2004 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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#define BLOCK_SIZE 512 /* FIXME: should ask the disk driver */
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int emile_first_set_param_scsi(int fd, char *second_name)
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{
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int ret;
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int fd_second;
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char first[1024];
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int i;
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int current;
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struct emile_container *container;
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unsigned short max_blocks;
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unsigned short *first_max_blocks = (unsigned short*)&first[1022];
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unsigned long *second_size = (unsigned long*)&first[1018];
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unsigned short *unit_id = (unsigned short*)&first[1016];
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unsigned short *block_size = (unsigned short*)&first[1014];
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unsigned short *count;
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unsigned long *offset;
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off_t 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 = *first_max_blocks / 6;
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container = (struct emile_container*)
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malloc(sizeof(struct emile_container)
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+ max_blocks * sizeof(struct emile_block));
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if (container == NULL)
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return EEMILE_MALLOC_ERROR;
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fd_second = open(second_name, O_RDONLY);
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if (fd_second == -1)
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return EEMILE_CANNOT_OPEN_FILE;
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ret = emile_scsi_create_container(fd_second, unit_id, container, max_blocks);
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if (ret != 0)
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return ret;
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close(fd_second);
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*block_size = BLOCK_SIZE;
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*second_size = 0;
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current = 1014;
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for(i = 0; i < max_blocks - 1; i++)
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{
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current -= 2;
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count = (unsigned short*)(&first[current]);
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*count = container->blocks[i].count;
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if (container->blocks[i].count == 0)
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break;
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current -= 4;
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offset = (unsigned long*)(&first[current]);
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*offset = container->blocks[i].offset;
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(*second_size) += container->blocks[i].count;
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}
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/* mark end of blocks list */
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current -= 2;
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count = (unsigned short*)(&first[current]);
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*count = 0;
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/* set second level size */
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(*second_size) *= BLOCK_SIZE;
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ret = lseek(fd, location, SEEK_SET);
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if (ret != 0)
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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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