"git-index-pack --fix-thin" relies on mmap() not changing the current
file position (otherwise the pack will be corrupted when writing the
final SHA1). Meet that expectation.
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset)
{
int n = 0;
+ off_t current_offset = lseek(fd, 0, SEEK_CUR);
if (start != NULL || !(flags & MAP_PRIVATE))
die("Invalid usage of gitfakemmap.");
n += count;
}
+ if (current_offset != lseek(fd, current_offset, SEEK_SET)) {
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
+
return start;
}