Merge all the common code for generating images

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

2 files changed, 169 insertions, 0 deletions

diff --git a/lib/sqfshelper/Makemodule.am b/lib/sqfshelper/Makemodule.am
index 62990fa..90a25d2 100644
--- a/lib/sqfshelper/Makemodule.am
+++ b/lib/sqfshelper/Makemodule.am
@@ -7,5 +7,6 @@ libsqfshelper_a_SOURCES += lib/sqfshelper/data_reader_dump.c
 libsqfshelper_a_SOURCES += lib/sqfshelper/compress.c lib/sqfshelper/comp_opt.c
 libsqfshelper_a_SOURCES += lib/sqfshelper/data_writer.c include/highlevel.h
 libsqfshelper_a_SOURCES += lib/sqfshelper/get_path.c lib/sqfshelper/io_stdin.c
+libsqfshelper_a_SOURCES += lib/sqfshelper/writer.c
 
 noinst_LIBRARIES += libsqfshelper.a
diff --git a/lib/sqfshelper/writer.c b/lib/sqfshelper/writer.c
new file mode 100644
index 0000000..76a12fc
--- /dev/null
+++ b/lib/sqfshelper/writer.c
@@ -0,0 +1,168 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * writer.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+
+#include "highlevel.h"
+#include "util.h"
+
+#include <string.h>
+
+void sqfs_writer_cfg_init(sqfs_writer_cfg_t *cfg)
+{
+	memset(cfg, 0, sizeof(*cfg));
+
+	cfg->num_jobs = 1;
+	cfg->block_size = SQFS_DEFAULT_BLOCK_SIZE;
+	cfg->devblksize = SQFS_DEVBLK_SIZE;
+	cfg->comp_id = compressor_get_default();
+}
+
+int sqfs_writer_init(sqfs_writer_t *sqfs, const sqfs_writer_cfg_t *wrcfg)
+{
+	sqfs_compressor_config_t cfg;
+	int ret;
+
+	if (compressor_cfg_init_options(&cfg, wrcfg->comp_id,
+					wrcfg->block_size,
+					wrcfg->comp_extra)) {
+		return -1;
+	}
+
+	sqfs->outfile = sqfs_open_file(wrcfg->filename, wrcfg->outmode);
+	if (sqfs->outfile == NULL) {
+		perror(wrcfg->filename);
+		return -1;
+	}
+
+	if (fstree_init(&sqfs->fs, wrcfg->fs_defaults))
+		goto fail_file;
+
+	sqfs->cmp = sqfs_compressor_create(&cfg);
+	if (sqfs->cmp == NULL) {
+		fputs("Error creating compressor\n", stderr);
+		goto fail_fs;
+	}
+
+	if (sqfs_super_init(&sqfs->super, wrcfg->block_size,
+			    sqfs->fs.defaults.st_mtime, wrcfg->comp_id)) {
+		goto fail_cmp;
+	}
+
+	if (sqfs_super_write(&sqfs->super, sqfs->outfile))
+		goto fail_cmp;
+
+	ret = sqfs->cmp->write_options(sqfs->cmp, sqfs->outfile);
+	if (ret < 0)
+		goto fail_cmp;
+
+	if (ret > 0)
+		sqfs->super.flags |= SQFS_FLAG_COMPRESSOR_OPTIONS;
+
+	sqfs->data = sqfs_data_writer_create(sqfs->super.block_size,
+					     sqfs->cmp, wrcfg->num_jobs,
+					     wrcfg->max_backlog,
+					     wrcfg->devblksize,
+					     sqfs->outfile);
+	if (sqfs->data == NULL) {
+		perror("creating data block processor");
+		goto fail_cmp;
+	}
+
+	register_stat_hooks(sqfs->data, &sqfs->stats);
+
+	sqfs->idtbl = sqfs_id_table_create();
+	if (sqfs->idtbl == NULL)
+		goto fail_data;
+
+	if (!wrcfg->no_xattr) {
+		sqfs->xwr = sqfs_xattr_writer_create();
+
+		if (sqfs->xwr == NULL) {
+			perror("creating xattr writer");
+			goto fail;
+		}
+	}
+
+	return 0;
+fail:
+	if (sqfs->xwr != NULL)
+		sqfs_xattr_writer_destroy(sqfs->xwr);
+	sqfs_id_table_destroy(sqfs->idtbl);
+fail_data:
+	sqfs_data_writer_destroy(sqfs->data);
+fail_cmp:
+	sqfs->cmp->destroy(sqfs->cmp);
+fail_fs:
+	fstree_cleanup(&sqfs->fs);
+fail_file:
+	sqfs->outfile->destroy(sqfs->outfile);
+	return -1;
+}
+
+int sqfs_writer_finish(sqfs_writer_t *sqfs, const sqfs_writer_cfg_t *cfg)
+{
+	if (sqfs_data_writer_finish(sqfs->data))
+		return -1;
+
+	tree_node_sort_recursive(sqfs->fs.root);
+	if (fstree_gen_inode_table(&sqfs->fs))
+		return -1;
+
+	sqfs->super.inode_count = sqfs->fs.inode_tbl_size;
+
+	if (sqfs_serialize_fstree(sqfs->outfile, &sqfs->super,
+				  &sqfs->fs, sqfs->cmp, sqfs->idtbl)) {
+		return -1;
+	}
+
+	if (sqfs_data_writer_write_fragment_table(sqfs->data, &sqfs->super))
+		return -1;
+
+	if (cfg->exportable) {
+		if (write_export_table(sqfs->outfile, &sqfs->fs,
+				       &sqfs->super, sqfs->cmp)) {
+			return -1;
+		}
+	}
+
+	if (sqfs_id_table_write(sqfs->idtbl, sqfs->outfile,
+				&sqfs->super, sqfs->cmp)) {
+		return -1;
+	}
+
+	if (sqfs_xattr_writer_flush(sqfs->xwr, sqfs->outfile,
+				    &sqfs->super, sqfs->cmp)) {
+		fputs("Error writing xattr table\n", stderr);
+		return -1;
+	}
+
+	sqfs->super.bytes_used = sqfs->outfile->get_size(sqfs->outfile);
+
+	if (sqfs_super_write(&sqfs->super, sqfs->outfile))
+		return 0;
+
+	if (padd_sqfs(sqfs->outfile, sqfs->super.bytes_used,
+		      cfg->devblksize)) {
+		return -1;
+	}
+
+	if (!cfg->quiet)
+		sqfs_print_statistics(&sqfs->super, &sqfs->stats);
+
+	return 0;
+}
+
+void sqfs_writer_cleanup(sqfs_writer_t *sqfs)
+{
+	if (sqfs->xwr != NULL)
+		sqfs_xattr_writer_destroy(sqfs->xwr);
+	sqfs_id_table_destroy(sqfs->idtbl);
+	sqfs_data_writer_destroy(sqfs->data);
+	sqfs->cmp->destroy(sqfs->cmp);
+	fstree_cleanup(&sqfs->fs);
+	sqfs->outfile->destroy(sqfs->outfile);
+}