libio: Add a function to open an istream_t from a directory iterator

For the native versions, this is currently dummied out, always returning
an error number. The idea is to laster wrap the libtar interface around
a directory iterator, here we need that method to support the existing
use case in tar2sqfs.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/io/src/unix/dir_iterator.c b/lib/io/src/unix/dir_iterator.c
index d2727ad..8d30b3f 100644
--- a/lib/io/src/unix/dir_iterator.c
+++ b/lib/io/src/unix/dir_iterator.c
@@ -126,6 +126,13 @@ static void dir_ignore_subdir(dir_iterator_t *it)
 	(void)it;
 }
 
+static int dir_open_file_ro(dir_iterator_t *it, istream_t **out)
+{
+	(void)it;
+	*out = NULL;
+	return SQFS_ERROR_UNSUPPORTED;
+}
+
 static int dir_open_subdir(dir_iterator_t *base, dir_iterator_t **out)
 {
 	const unix_dir_iterator_t *it = (const unix_dir_iterator_t *)base;
@@ -166,6 +173,7 @@ static int dir_open_subdir(dir_iterator_t *base, dir_iterator_t **out)
 	((dir_iterator_t *)sub)->read_link = dir_read_link;
 	((dir_iterator_t *)sub)->open_subdir = dir_open_subdir;
 	((dir_iterator_t *)sub)->ignore_subdir = dir_ignore_subdir;
+	((dir_iterator_t *)sub)->open_file_ro = dir_open_file_ro;
 
 	*out = (dir_iterator_t *)sub;
 	return 0;
@@ -206,6 +214,7 @@ dir_iterator_t *dir_iterator_create(const char *path)
 	((dir_iterator_t *)it)->read_link = dir_read_link;
 	((dir_iterator_t *)it)->open_subdir = dir_open_subdir;
 	((dir_iterator_t *)it)->ignore_subdir = dir_ignore_subdir;
+	((dir_iterator_t *)it)->open_file_ro = dir_open_file_ro;
 
 	return (dir_iterator_t *)it;
 }