libfstree.a: add function to get struct stat from tree node

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

3 files changed, 48 insertions, 1 deletions

diff --git a/include/fstree.h b/include/fstree.h
index 3979503..23cf967 100644
--- a/include/fstree.h
+++ b/include/fstree.h
@@ -254,4 +254,7 @@ int fstree_gen_inode_table(fstree_t *fs);
 */
 char *fstree_get_path(tree_node_t *node);
 
+/* get a struct stat from a tree node */
+void fstree_node_stat(fstree_t *fs, tree_node_t *node, struct stat *sb);
+
 #endif /* FSTREE_H */
diff --git a/lib/Makemodule.am b/lib/Makemodule.am
index a676291..3d0cf41 100644
--- a/lib/Makemodule.am
+++ b/lib/Makemodule.am
@@ -1,7 +1,7 @@
 libfstree_a_SOURCES = lib/fstree/fstree.c lib/fstree/fstree_from_file.c
 libfstree_a_SOURCES += lib/fstree/fstree_sort.c lib/fstree/fstree_from_dir.c
 libfstree_a_SOURCES += lib/fstree/gen_inode_table.c lib/fstree/get_path.c
-libfstree_a_SOURCES += include/fstree.h
+libfstree_a_SOURCES += lib/fstree/node_stat.c include/fstree.h
 libfstree_a_CFLAGS = $(AM_CFLAGS)
 libfstree_a_CPPFLAGS = $(AM_CPPFLAGS)
 
diff --git a/lib/fstree/node_stat.c b/lib/fstree/node_stat.c
new file mode 100644
index 0000000..a6ec097
--- /dev/null
+++ b/lib/fstree/node_stat.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+#include "fstree.h"
+
+#include <string.h>
+
+void fstree_node_stat(fstree_t *fs, tree_node_t *node, struct stat *sb)
+{
+	tree_node_t *n;
+
+	memset(sb, 0, sizeof(*sb));
+
+	sb->st_ino = node->inode_num;
+	sb->st_mode = node->mode;
+	sb->st_nlink = 1;
+	sb->st_uid = node->uid;
+	sb->st_gid = node->gid;
+	sb->st_blksize = fs->block_size;
+	sb->st_mtime = fs->default_mtime;
+	sb->st_atime = sb->st_mtime;
+	sb->st_ctime = sb->st_mtime;
+
+	switch (node->mode & S_IFMT) {
+	case S_IFDIR:
+		sb->st_nlink = 2;
+
+		for (n = node->data.dir->children; n != NULL; n = n->next)
+			sb->st_nlink += 1;
+
+		sb->st_size = node->data.dir->size;
+		break;
+	case S_IFREG:
+		sb->st_size = node->data.file->size;
+		break;
+	case S_IFLNK:
+		sb->st_size = strlen(node->data.slink_target);
+		break;
+	case S_IFBLK:
+	case S_IFCHR:
+		sb->st_rdev = node->data.devno;
+		break;
+	}
+
+	sb->st_blocks = sb->st_size / fs->block_size;
+}