sysupdate: add new component "sysupdate"

src/sysupdate/sysupdate-transfer.h

@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <sys/types.h>
+
+#include "sd-id128.h"
+
+/* Forward declare this type so that the headers below can use it */
+typedef struct Transfer Transfer;
+
+#include "sysupdate-partition.h"
+#include "sysupdate-resource.h"
+
+struct Transfer {
+        char *definition_path;
+        char *min_version;
+        char **protected_versions;
+        char *current_symlink;
+        bool verify;
+
+        Resource source, target;
+
+        uint64_t instances_max;
+        bool remove_temporary;
+
+        /* When creating a new partition/file, optionally override these attributes explicitly */
+        sd_id128_t partition_uuid;
+        bool partition_uuid_set;
+        uint64_t partition_flags;
+        bool partition_flags_set;
+        mode_t mode;
+        uint64_t tries_left, tries_done;
+        int no_auto;
+        int read_only;
+        int growfs;
+
+        /* If we create a new file/dir/subvol in the fs, the temporary and final path we create it under, as well as the read-only flag for it */
+        char *temporary_path;
+        char *final_path;
+        int install_read_only;
+
+        /* If we write to a partition in a partition table, the metrics of it */
+        PartitionInfo partition_info;
+        PartitionChange partition_change;
+};
+
+Transfer *transfer_new(void);
+
+Transfer *transfer_free(Transfer *t);
+DEFINE_TRIVIAL_CLEANUP_FUNC(Transfer*, transfer_free);
+
+int transfer_read_definition(Transfer *t, const char *path);
+
+int transfer_resolve_paths(Transfer *t, const char *root, const char *node);
+
+int transfer_vacuum(Transfer *t, uint64_t space, const char *extra_protected_version);
+
+int transfer_acquire_instance(Transfer *t, Instance *i);
+
+int transfer_install_instance(Transfer *t, Instance *i, const char *root);