Maitain attributes of files while extracting them.

doc/source/sw-description.rst

@@ -579,6 +579,14 @@ There are 4 main sections inside sw-description:
 |             |          |            | "filesystem" type. (path is always    |
 |             |          |            | relative to the mount point.)         |
 +-------------+----------+------------+---------------------------------------+
+| preserve-   | bool     | files      | flag to control whether the following |
+| attributes  |          |            | attributes will be preserved when     |
+|             |          |            | files are unpacked from an archive    |
+|             |          |            | (assuming destination filesystem      |
+|             |          |            | supports them, of course):            |
+|             |          |            | timestamp, uid/gid (numeric), perms,  |
+|             |          |            | file attributes, extended attributes  |
++-------------+----------+------------+---------------------------------------+
 | type        | string   | images     | string identifier for the handler,    |
 |             |          | files      | as it is set by the handler when it   |
 |             |          | scripts    | regitsters itself.                    |

handlers/archive_handler.c

@@ -197,8 +197,20 @@ static int install_archive_image(struct img_type *img,
 	TRACE("Installing file %s on %s\n",
 		img->fname, path);
 
+	TRACE("Installing file %s on %s, %s attributes\n",
+		img->fname, path,
+		img->preserve_attributes ? "preserving" : "ignoring");
+
+
 	tf.flags = 0;
 
+	if (img->preserve_attributes) {
+		tf.flags |= ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM |
+					ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL |
+					ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR;
+	}
+
+
 	ret = pthread_create(&extract_thread, &attr, extract, &tf);
 	if (ret) {
 		ERROR("Code from pthread_create() is %d\n",

include/swupdate.h

@@ -72,6 +72,7 @@ struct img_type {
 	int required;
 	int provided;
 	int compressed;
+	int preserve_attributes; /* whether to preserve attributes in archives */
 	int is_encrypted;
 	int install_directly;
 	int is_script;

parser/parser.c

@@ -465,6 +465,7 @@ static void parse_files(parsertype p, void *cfg, struct swupdate_cfg *swcfg)
 			strcpy(file->type, "rawfile");
 		}
 		get_field(p, elem, "compressed", &file->compressed);
+		get_field(p, elem, "preserve-attributes", &file->preserve_attributes);
 		get_field(p, elem, "installed-directly", &file->install_directly);
 		get_field(p, elem, "install-if-different", &file->id.install_if_different);
 		get_field(p, elem, "encrypted", &file->is_encrypted);