archive_plugin: use GError in the open() method

src/archive/bz2_archive_plugin.c

@@ -98,7 +98,7 @@ bz2_destroy(struct bz2_archive_file *data)
 /* archive open && listing routine */
 
 static struct archive_file *
-bz2_open(const char *pathname)
+bz2_open(const char *pathname, GError **error_r)
 {
 	struct bz2_archive_file *context;
 	int len;
@@ -107,8 +107,7 @@ bz2_open(const char *pathname)
 	archive_file_init(&context->base, &bz2_archive_plugin);
 
 	//open archive
-	if (!input_stream_open(&context->istream, pathname, NULL)) {
-		g_warning("failed to open an bzip2 archive %s\n",pathname);
+	if (!input_stream_open(&context->istream, pathname, error_r)) {
 		g_free(context);
 		return NULL;
 	}

src/archive/iso9660_archive_plugin.c

@@ -90,7 +90,7 @@ listdir_recur(const char *psz_path, struct iso9660_archive_file *context)
 }
 
 static struct archive_file *
-iso9660_archive_open(const char *pathname)
+iso9660_archive_open(const char *pathname, GError **error_r)
 {
 	struct iso9660_archive_file *context =
 		g_new(struct iso9660_archive_file, 1);
@@ -102,7 +102,8 @@ iso9660_archive_open(const char *pathname)
 	/* open archive */
 	context->iso = iso9660_open (pathname);
 	if (context->iso   == NULL) {
-		g_warning("iso %s open failed\n", pathname);
+		g_set_error(error_r, iso9660_quark(), 0,
+			    "Failed to open ISO9660 file %s", pathname);
 		return NULL;
 	}
 

src/archive/zzip_archive_plugin.c

@@ -52,7 +52,7 @@ zzip_quark(void)
 /* archive open && listing routine */
 
 static struct archive_file *
-zzip_archive_open(const char *pathname)
+zzip_archive_open(const char *pathname, GError **error_r)
 {
 	struct zzip_archive *context = g_malloc(sizeof(*context));
 	ZZIP_DIRENT dirent;
@@ -63,7 +63,8 @@ zzip_archive_open(const char *pathname)
 	context->list = NULL;
 	context->dir = zzip_dir_open(pathname, NULL);
 	if (context->dir  == NULL) {
-		g_warning("zipfile %s open failed\n", pathname);
+		g_set_error(error_r, zzip_quark(), 0,
+			    "Failed to open ZIP file %s", pathname);
 		return NULL;
 	}
 

src/archive_plugin.c

@@ -23,15 +23,17 @@
 #include <assert.h>
 
 struct archive_file *
-archive_file_open(const struct archive_plugin *plugin, const char *path)
+archive_file_open(const struct archive_plugin *plugin, const char *path,
+		  GError **error_r)
 {
 	struct archive_file *file;
 
 	assert(plugin != NULL);
 	assert(plugin->open != NULL);
 	assert(path != NULL);
+	assert(error_r == NULL || *error_r == NULL);
 
-	file = plugin->open(path);
+	file = plugin->open(path, error_r);
 
 	if (file != NULL) {
 		assert(file->plugin != NULL);
@@ -39,6 +41,9 @@ archive_file_open(const struct archive_plugin *plugin, const char *path)
 		assert(file->plugin->scan_reset != NULL);
 		assert(file->plugin->scan_next != NULL);
 		assert(file->plugin->open_stream != NULL);
+		assert(error_r == NULL || *error_r == NULL);
+	} else {
+		assert(error_r == NULL || *error_r != NULL);
 	}
 
 	return file;

src/archive_plugin.h

@@ -48,7 +48,7 @@ struct archive_plugin {
 	 * returns pointer to handle used is all operations with this archive
 	 * or NULL when opening fails
 	 */
-	struct archive_file *(*open)(const char *path_fs);
+	struct archive_file *(*open)(const char *path_fs, GError **error_r);
 
 	/**
 	 * reset routine will move current read index in archive to default
@@ -90,7 +90,8 @@ struct archive_plugin {
 };
 
 struct archive_file *
-archive_file_open(const struct archive_plugin *plugin, const char *path);
+archive_file_open(const struct archive_plugin *plugin, const char *path,
+		  GError **error_r);
 
 void
 archive_file_close(struct archive_file *file);

src/input/archive_input_plugin.c

@@ -61,7 +61,7 @@ input_archive_open(struct input_stream *is, const char *pathname,
 		return false;
 	}
 
-	file = archive_file_open(arplug, archive);
+	file = archive_file_open(arplug, archive, error_r);
 	if (file == NULL)
 		return false;
 

src/update_walk.c

@@ -394,6 +394,7 @@ update_archive_file(struct directory *parent, const char *name,
 		    const struct stat *st,
 		    const struct archive_plugin *plugin)
 {
+	GError *error = NULL;
 	char *path_fs;
 	struct archive_file *file;
 	struct directory *directory;
@@ -409,10 +410,11 @@ update_archive_file(struct directory *parent, const char *name,
 	path_fs = map_directory_child_fs(parent, name);
 
 	/* open archive */
-	file = archive_file_open(plugin, path_fs);
+	file = archive_file_open(plugin, path_fs, &error);
 	if (file == NULL) {
-		g_warning("unable to open archive %s", path_fs);
 		g_free(path_fs);
+		g_warning("%s", error->message);
+		g_error_free(error);
 		return;
 	}