Implement reading and writing of compressor options

 - gensquashfs simply asks the backend compressor to write its options
   to the file and does accounting
 - rdsquasfs simply asks the backend compressor to transparentyl snort
   the options from the file
 - not implemented in any compressor backend yet

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

1 files changed, 5 insertions, 7 deletions

diff --git a/unpack/rdsquashfs.c b/unpack/rdsquashfs.c
index a24434c..8ee3dbd 100644
--- a/unpack/rdsquashfs.c
+++ b/unpack/rdsquashfs.c
@@ -260,13 +260,6 @@ int main(int argc, char **argv)
 		goto out_fd;
 	}
 
-	if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
-		fputs("Image has been built with compressor options.\n"
-		      "This is not yet supported.\n",
-		      stderr);
-		goto out_fd;
-	}
-
 	if (!compressor_exists(super.compression_id)) {
 		fputs("Image uses a compressor that has not been built in\n",
 		      stderr);
@@ -278,6 +271,11 @@ int main(int argc, char **argv)
 	if (info.cmp == NULL)
 		goto out_fd;
 
+	if (super.flags & SQFS_FLAG_COMPRESSOR_OPTIONS) {
+		if (info.cmp->read_options(info.cmp, info.sqfsfd))
+			goto out_cmp;
+	}
+
 	if (read_fstree(&fs, &super, &info))
 		goto out_cmp;