Remove call to obsolete gethostbyname, using getaddrinfo

Differential Revision: https://reviews.llvm.org/D67230

llvm-svn: 371195

1 files changed, 10 insertions, 4 deletions

diff --git a/lldb/source/Host/posix/HostInfoPosix.cpp b/lldb/source/Host/posix/HostInfoPosix.cpp
index f300e22e9e5..78300fca034 100644
--- a/lldb/source/Host/posix/HostInfoPosix.cpp
+++ b/lldb/source/Host/posix/HostInfoPosix.cpp
@@ -32,10 +32,16 @@ bool HostInfoPosix::GetHostname(std::string &s) {
   char hostname[PATH_MAX];
   hostname[sizeof(hostname) - 1] = '\0';
   if (::gethostname(hostname, sizeof(hostname) - 1) == 0) {
-    struct hostent *h = ::gethostbyname(hostname);
-    if (h)
-      s.assign(h->h_name);
-    else
+    struct addrinfo hints;
+    struct addrinfo *res = nullptr;
+    std::memset(&hints, 0, sizeof(hints));
+    hints.ai_flags = AI_CANONNAME;
+    int err = ::getaddrinfo(hostname, nullptr, &hints, &res);
+    if (err == 0) {
+      assert(res->ai_canonname && "getaddrinfo found a canonical name");
+      s.assign(res->ai_canonname);
+      freeaddrinfo(res);
+    } else
       s.assign(hostname);
     return true;
   }