From ee7d88ee5b40912900e038ea9adde003d65102a2 Mon Sep 17 00:00:00 2001
From: Antonio SJ Musumeci <trapexit@spawn.link>
Date: Fri, 13 Mar 2026 16:05:30 -0500
Subject: [PATCH] Improve error handling when querying pagesize

---
 src/config_pagesize.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/config_pagesize.cpp b/src/config_pagesize.cpp
index c71737ec..5c4c6c6c 100644
--- a/src/config_pagesize.cpp
+++ b/src/config_pagesize.cpp
@@ -20,6 +20,8 @@
 
 #include "from_string.hpp"
 
+#include <cassert>
+#include <climits>
 #include <cctype>
 #include <string>
 
@@ -48,12 +50,20 @@ ConfigPageSize::from_string(const std::string_view s_)
 {
   int rv;
   u64 v;
+  long tmp;
   u64 pagesize;
 
   if(s_.empty())
     return -EINVAL;
 
-  pagesize = sysconf(_SC_PAGESIZE);
+  tmp = sysconf(_SC_PAGESIZE);
+  if(tmp <= 0)
+    {
+      perror("mergerfs: pagesize query failed");
+      std::abort();
+    }
+
+  pagesize = (u64)tmp;
 
   rv = str::from(s_,&v);
   if(rv < 0)