From 309f464a5952c7d7504b875bf4853914b1242346 Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Fri, 3 Feb 2017 17:13:08 +0100
Subject: agent: Tell the Pinentry the client's pid.

* configure.ac: Check for SO_PEERCRED et al.
* agent/agent.h (server_control_s): Add field 'client_pid'.
* agent/command.c (start_command_handler): Set CLIENT_PID.
* agent/command-ssh.c (get_client_pid): New.
(start_command_handler_ssh): Set CLIENT_PID.
* agent/call-pinentry.c (start_pinentry): Tell Pinentry the client-pid.

Signed-off-by: Werner Koch <wk@gnupg.org>
---
 configure.ac | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 75bed06c4..ce02d037a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1375,6 +1375,53 @@ if test $ac_cv_func_mmap != yes -a $mmap_needed = yes; then
   AC_MSG_ERROR([[Sorry, the current implemenation requires mmap.]])
 fi
 
+
+#
+# Check for the getsockopt SO_PEERCRED
+# (This has been copied from libassuan)
+#
+AC_MSG_CHECKING(for SO_PEERCRED)
+AC_CACHE_VAL(gnupg_cv_sys_so_peercred,
+      [AC_TRY_COMPILE([#include <sys/socket.h>],
+         [struct ucred cr;
+          int cl = sizeof cr;
+          getsockopt (1, SOL_SOCKET, SO_PEERCRED, &cr, &cl);],
+          gnupg_cv_sys_so_peercred=yes,
+          gnupg_cv_sys_so_peercred=no)
+       ])
+AC_MSG_RESULT($gnupg_cv_sys_so_peercred)
+
+if test $gnupg_cv_sys_so_peercred = yes; then
+  AC_DEFINE(HAVE_SO_PEERCRED, 1,
+            [Defined if SO_PEERCRED is supported (Linux specific)])
+else
+  # Check for the getsockopt LOCAL_PEEREID (NetBSD)
+  AC_MSG_CHECKING(for LOCAL_PEEREID)
+  AC_CACHE_VAL(gnupg_cv_sys_so_local_peereid,
+      [AC_TRY_COMPILE([#include <sys/socket.>
+         #include <sys/un.h>],
+         [struct unpcbid unp;
+          int unpl = sizeof unp;
+          getsockopt (1, SOL_SOCKET, LOCAL_PEEREID, &unp, &unpl);],
+          gnupg_cv_sys_so_local_peereid=yes,
+          gnupg_cv_sys_so_local_peereid=no)
+       ])
+  AC_MSG_RESULT($gnupg_cv_sys_so_local_peereid)
+
+  if test $gnupg_cv_sys_so_local_peereid = yes; then
+    AC_DEFINE(HAVE_LOCAL_PEEREID, 1,
+              [Defined if LOCAL_PEEREID is supported (NetBSD specific)])
+  else
+    # (Open)Solaris
+    AC_CHECK_FUNCS([getpeerucred], AC_CHECK_HEADERS([ucred.h]))
+    if test $ac_cv_func_getpeerucred != yes; then
+        # FreeBSD
+        AC_CHECK_FUNCS([getpeereid])
+    fi
+  fi
+fi
+
+
 #
 # W32 specific test
 #
-- 
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