prevent null dereference on bad search term

1 files changed, 8 insertions, 0 deletions

diff --git a/booki.c b/booki.c
index 5b884d9..c780c44 100644
--- a/booki.c
+++ b/booki.c
@@ -765,6 +765,11 @@ struct search_opt parse_search_options(int argc, char* argv[]) {
                 edit = true;
                 break;
             case '?':
+                if (!argv[optind] || argv[optind][0] == '-') {
+                    printf("%s requires an operand\n", argv[optind-1]);
+                    opt_out.count = -1;
+                    return opt_out;
+                }
                 // optind points at the argument (one past the option)
                 opt_out.opts[count] = argv[optind-1] + 2;  // '--example' -> 'example'
                 opt_out.args[count] = argv[optind];
@@ -786,6 +791,9 @@ struct search_opt parse_search_options(int argc, char* argv[]) {
 
 void search(int argc, char* argv[], char* booki_file) {
     struct search_opt search_opts = parse_search_options(argc, argv);
+    if (search_opts.count == -1) {
+        return;
+    }
 
     // get the books array
     char* data = load_file(booki_file);