From d059229bb5d7bcc583adc74ffadb8a886f726386 Mon Sep 17 00:00:00 2001
From: Shubham Vasudeo Desai <sdesai8@vclvm177-54.vcl.ncsu.edu>
Date: Tue, 15 Oct 2024 14:50:31 -0400
Subject: [PATCH] null check

---
 raster/r.in.gridatb/file_io.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/raster/r.in.gridatb/file_io.c b/raster/r.in.gridatb/file_io.c
index 256f9869473..52ad174df4d 100644
--- a/raster/r.in.gridatb/file_io.c
+++ b/raster/r.in.gridatb/file_io.c
@@ -12,6 +12,9 @@ void rdwr_gridatb(void)
     float idx;
 
     fp = fopen(file, "r");
+    if (!fp) {
+        G_fatal_error(_("Unable to open file: %s"), file);
+    }
 
     buf[0] = 0;
     if (fscanf(fp, "%[^\n]", buf) != 1)