gensquashfs: Make '-X help' work without specifying input/output files

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

1 files changed, 5 insertions, 0 deletions

diff --git a/mkfs/options.c b/mkfs/options.c
index 14c648d..36539b7 100644
--- a/mkfs/options.c
+++ b/mkfs/options.c
@@ -308,6 +308,11 @@ void process_command_line(options_t *opt, int argc, char **argv)
 		}
 	}
 
+	if (opt->comp_extra != NULL && strcmp(opt->comp_extra, "help") == 0) {
+		compressor_print_help(opt->compressor);
+		exit(EXIT_SUCCESS);
+	}
+
 	if ((optind + 1) >= argc) {
 		fputs("Missing arguments: input and output files.\n", stderr);
 		goto fail_arg;