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, 10 insertions, 1 deletions

diff --git a/mkfs/mkfs.c b/mkfs/mkfs.c
index d708d37..ae6210b 100644
--- a/mkfs/mkfs.c
+++ b/mkfs/mkfs.c
@@ -39,7 +39,7 @@ static int padd_file(sqfs_info_t *info)
 
 int main(int argc, char **argv)
 {
-	int status = EXIT_FAILURE;
+	int status = EXIT_FAILURE, ret;
 	sqfs_info_t info;
 
 	memset(&info, 0, sizeof(info));
@@ -81,6 +81,15 @@ int main(int argc, char **argv)
 		goto out_outfd;
 	}
 
+	ret = info.cmp->write_options(info.cmp, info.outfd);
+	if (ret < 0)
+		goto out_cmp;
+
+	if (ret > 0) {
+		info.super.flags |= SQFS_FLAG_COMPRESSOR_OPTIONS;
+		info.super.bytes_used += ret;
+	}
+
 	if (write_data_to_image(&info))
 		goto out_cmp;