From 0b79498c04368292fff37cd193407211cfb46978 Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Thu, 25 Apr 2024 17:12:27 +0000
Subject: [PATCH] Simplify sscanf pattern for parsing /etc/hosts

---
 nmap_dns.cc | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/nmap_dns.cc b/nmap_dns.cc
index 089345ff6..225fdd27d 100644
--- a/nmap_dns.cc
+++ b/nmap_dns.cc
@@ -1005,9 +1005,8 @@ static void parse_etchosts(const char *fname) {
     // Skip any leading whitespace
     while (*tp == ' ' || *tp == '\t') tp++;
 
-    std::stringstream pattern;
-    pattern << "%" << INET6_ADDRSTRLEN << "s %255s";
-    if (sscanf(tp, pattern.str().c_str(), ipaddrstr, hname) == 2)
+    static const char *pattern = "%" STR(INET6_ADDRSTRLEN) "s %255s";
+    if (sscanf(tp, pattern, ipaddrstr, hname) == 2)
       if (sockaddr_storage_inet_pton(ipaddrstr, &ia))
       {
         const std::string hname_ = hname;