1 files changed, 34 insertions, 0 deletions

diff --git a/src/shell.c b/src/shell.c
index 6e67e0a..31dde0e 100644
--- a/src/shell.c
+++ b/src/shell.c
@@ -3,6 +3,27 @@
 static void             cleanwhitespaces(char *line);
 static int              parseline(char *line, char **v);
 
+bool
+checkfiles()
+{
+        /* TODO: add more checks (other files, use checksum...) */
+        FILE *f;
+        char fname[strlen(tabledir)+100];
+        int i;
+
+        for (i = 0; allpd[i] != NULL; i++) {
+                strcpy(fname, tabledir);
+                strcpy(fname, "/");
+                strcpy(fname, allpd[i]->filename);
+                if ((f = fopen(fname, "rb")) == NULL)
+                        return false;
+                else
+                        fclose(f);
+        }
+
+        return true;
+}
+
 static void
 cleanwhitespaces(char *line)
 {
@@ -119,6 +140,19 @@ launch(bool batchmode)
 int
 main(int argc, char *argv[])
 {
+        init_env();
+
+        if (!checkfiles()) {
+                fprintf(stderr,
+                        "--- Warning ---\n"
+                        "Some pruning tables are missing or unreadable."
+                        "You can generate them with `nissy gen -t 4'\n"
+                        "Here `4' is the number of threads. Use more if your"
+                        "CPU has them, or expect it to take a while.\n"
+                        "---------------\n\n"
+                );
+        }
+
         if (argc > 1) {
                 if (!strcmp(argv[1], "-b")) {
                         launch(true);