From 29a910069e5872ce1ba3e6370829362540fd67e9 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Sun, 15 Mar 2020 11:02:53 +0000
Subject: [PATCH] main: write error if password cannot be read

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
 src/main.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main.c b/src/main.c
index a195edb..6e83e8b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -56,6 +56,7 @@ static void read_password(void)
   const char filename[] = "/etc/sispmctl/password";
   char buf[BUFSIZE];
   char *pos;
+  size_t len;
 
   file = fopen(filename, "r");
   if (!file) {
@@ -67,7 +68,11 @@ static void read_password(void)
     return;
   }
   memset(buf, 0, BUFSIZE);
-  fread(buf, 1, BUFSIZE - 1, file);
+  len = fread(buf, 1, BUFSIZE - 1, file);
+  if (!len) {
+    fprintf(stderr, "Failed to read password\n");
+    exit(EXIT_FAILURE);
+  }
   pos = strchr(buf, '\n');
   if (pos) {
     *pos = '\0';