From 5402136e628d36733e9ac3bba8db29992938dfcc Mon Sep 17 00:00:00 2001
From: Zac Stewart <zgstewart@gmail.com>
Date: Mon, 8 Jun 2020 19:28:16 -0400
Subject: [PATCH] Report when a file cannot be opened

---
 tools/blkpack.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/blkpack.c b/tools/blkpack.c
index 52b9b34..ec3ad72 100644
--- a/tools/blkpack.c
+++ b/tools/blkpack.c
@@ -2,6 +2,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <dirent.h>
+#include <errno.h>
 #include <string.h>
 #include <sys/stat.h>
 
@@ -41,6 +42,10 @@ int main(int argc, char *argv[])
         strcat(fullpath, "/");
         strcat(fullpath, ep->d_name);
         FILE *fp = fopen(fullpath, "r");
+        if (fp == NULL) {
+            fprintf(stderr, "Could not open %s: %s\n", ep->d_name, strerror(errno));
+            continue;
+        }
         char *line = NULL;
         size_t n = 0;
         for (int i=0; i<16; i++) {