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Avoid offset overflow on disk bigger than 2 GB

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This commit is contained in:
Laurent Vivier 2008-04-12 22:15:20 +00:00
parent b1594201cb
commit f5d95ed881
1 changed files with 4 additions and 2 deletions
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6
tools/device.c
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@ -4,6 +4,8 @@
*
*/
#define _LARGEFILE64_SOURCE
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
@ -26,7 +28,7 @@ int device_read_sector(void *data,off_t offset, void* buffer, size_t size)
int fd = (long)data;
int ret;
lseek(fd, offset * device_sector_size, SEEK_SET);
lseek64(fd, (unsigned long long)offset * device_sector_size, SEEK_SET);
ret = read(fd, buffer, BLOCKS(size) * device_sector_size);
if (ret != BLOCKS(size) * device_sector_size)
return -1;
@ -38,7 +40,7 @@ int device_write_sector(void *data,off_t offset, void* buffer, size_t size)
int fd = (long)data;
int ret;
lseek(fd, offset * device_sector_size, SEEK_SET);
lseek64(fd, (unsigned long long)offset * device_sector_size, SEEK_SET);
ret = write(fd, buffer, BLOCKS(size) * device_sector_size);
if (ret != BLOCKS(size) * device_sector_size)
return -1;