int file_dup(int fd1, int fd2)
{
int ret;
struct file *file1, *file2;
if ((ret = fd2file(fd1, &file1)) != 0) {
return ret;
}
if ((ret = filemap_alloc(fd2, &file2)) != 0) {
return ret;
}
filemap_dup(file2, file1);
return file2->fd;
}
int
dup_fs(struct fs_struct *to, struct fs_struct *from) {
assert(to != NULL && from != NULL);
assert(fs_count(to) == 0 && fs_count(from) > 0);
if ((to->pwd = from->pwd) != NULL) {
vop_ref_inc(to->pwd);
}
int i;
struct file *to_file = to->filemap, *from_file = from->filemap;
for (i = 0; i < FS_STRUCT_NENTRY; i ++, to_file ++, from_file ++) {
if (from_file->status == FD_OPENED) {
/* alloc_fd first */
to_file->status = FD_INIT;
filemap_dup(to_file, from_file);
}
}
return 0;
}