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Read driver in memory before writing it

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This commit is contained in:
Laurent Vivier 2006-09-24 22:46:26 +00:00
parent 51c32ac892
commit 6abf87cc0b
1 changed files with 45 additions and 11 deletions
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56
tools/emile-mkisofs.c
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@ -71,16 +71,40 @@ static void usage(int argc, char** argv)
fprintf(stderr, "\nbuild: \n%s\n", SIGNATURE);
}
#define BLOCKSIZE (2048)
static int create_apple_driver(char *temp, char *appledriver, char *first_level)
{
struct DriverDescriptor block0;
struct Partition map2048;
struct Partition map512;
FILE* fd;
FILE* fd_driver;
int fd_driver;
char *buffer;
char *driver;
int ret;
int i;
struct stat st;
int blocksize;
/* read apple driver */
fd_driver = open(appledriver, O_RDONLY);
if (fd_driver == -1)
{
fprintf(stderr, "Cannot open %s\n", appledriver);
return -1;
}
fstat(fd_driver, &st);
driver = malloc(st.st_size);
if (driver == NULL)
{
fprintf(stderr, "Cannot malloc %ld bytes\n", st.st_size);
return -1;
}
ret = read(fd_driver, driver, st.st_size);
close(fd_driver);
/* HFS CD Label Block 512 bytes
* Driver Partition Map (for 2048 byte blocks) 512 bytes
@ -93,7 +117,7 @@ static int create_apple_driver(char *temp, char *appledriver, char *first_level)
memset(&block0, 0, sizeof(block0));
write_short(&block0.Sig, DD_SIGNATURE);
write_short(&block0.BlkSize, 2048);
write_short(&block0.BlkSize, BLOCKSIZE);
write_long(&block0.BlkCount, 0);
write_short(&block0.DevType, 1);
write_short(&block0.DevId, 1);
@ -149,22 +173,32 @@ static int create_apple_driver(char *temp, char *appledriver, char *first_level)
memset(&map512, 0, sizeof(map512));
ret = fwrite(&map512, 1, sizeof(map512), fd);
buffer = malloc(read_short(&block0.BlkSize));
fd_driver = fopen(appledriver, "r");
blocksize = read_short(&block0.BlkSize);
buffer = malloc(blocksize);
for(i = 0; i < read_long(&map2048.PartBlkCnt); i++)
{
memset(buffer, 0, read_short(&block0.BlkSize));
ret = fread(buffer, 1, read_short(&block0.BlkSize), fd_driver);
fwrite(buffer, read_short(&block0.BlkSize), 1, fd);
memset(buffer, 0, blocksize);
if (i * blocksize < st.st_size)
{
int remaining = st.st_size - i * blocksize;
if (remaining >= blocksize)
memcpy(buffer, driver + i * blocksize, blocksize);
else
memcpy(buffer, driver + i * blocksize, remaining);
}
fwrite(buffer, blocksize, 1, fd);
}
free(buffer);
fclose(fd_driver);
free(driver);
/* read and write bootblock */
buffer = malloc(1024);
fd_driver = fopen(first_level, "r");
fread(buffer, 1, 1024, fd_driver);
fd_driver = open(first_level, O_RDONLY);
read(fd_driver, buffer, 1024);
fwrite(buffer, 1024, 1, fd);
fclose(fd_driver);
close(fd_driver);
free(buffer);
fclose(fd);