From 7b66ea18ff47ab47aaf1ca20bc7f544a76b0e8df Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Thu, 14 Mar 2013 13:36:05 +0100
Subject: [PATCH] unix: improve uv_guess_handle() implementation

Make it understand FIFOs, character devices and sockets.
---
 src/unix/tty.c | 43 +++++++++++++++++++++++++++++++++++--------
 1 file changed, 35 insertions(+), 8 deletions(-)

diff --git a/src/unix/tty.c b/src/unix/tty.c
index 49efee7f..df32e673 100644
--- a/src/unix/tty.c
+++ b/src/unix/tty.c
@@ -118,25 +118,52 @@ int uv_tty_get_winsize(uv_tty_t* tty, int* width, int* height) {
 
 
 uv_handle_type uv_guess_handle(uv_file file) {
+  struct sockaddr sa;
   struct stat s;
+  socklen_t len;
+  int type;
 
-  if (file < 0) {
+  if (file < 0)
     return UV_UNKNOWN_HANDLE;
-  }
 
-  if (isatty(file)) {
+  if (isatty(file))
     return UV_TTY;
-  }
 
-  if (fstat(file, &s)) {
+  if (fstat(file, &s))
     return UV_UNKNOWN_HANDLE;
-  }
 
-  if (!S_ISSOCK(s.st_mode) && !S_ISFIFO(s.st_mode)) {
+  if (S_ISREG(s.st_mode))
     return UV_FILE;
+
+  if (S_ISCHR(s.st_mode))
+    return UV_FILE;  /* XXX UV_NAMED_PIPE? */
+
+  if (S_ISFIFO(s.st_mode))
+    return UV_NAMED_PIPE;
+
+  if (!S_ISSOCK(s.st_mode))
+    return UV_UNKNOWN_HANDLE;
+
+  len = sizeof(type);
+  if (getsockopt(file, SOL_SOCKET, SO_TYPE, &type, &len))
+    return UV_UNKNOWN_HANDLE;
+
+  len = sizeof(sa);
+  if (getsockname(file, &sa, &len))
+    return UV_UNKNOWN_HANDLE;
+
+  if (type == SOCK_DGRAM)
+    if (sa.sa_family == AF_INET || sa.sa_family == AF_INET6)
+      return UV_UDP;
+
+  if (type == SOCK_STREAM) {
+    if (sa.sa_family == AF_INET || sa.sa_family == AF_INET6)
+      return UV_TCP;
+    if (sa.sa_family == AF_UNIX)
+      return UV_NAMED_PIPE;
   }
 
-  return UV_NAMED_PIPE;
+  return UV_UNKNOWN_HANDLE;
 }