Sort out getpeereid() and peer auth handling on Windows

The getpeereid() uses have so far been protected by HAVE_UNIX_SOCKETS,
so they didn't ever care about Windows support.  But in anticipation
of Unix-domain socket support on Windows, that needs to be handled
differently.

Windows doesn't support getpeereid() at this time, so we use the
existing not-supported code path.  We let configure do its usual thing
of picking up the replacement from libpgport, instead of the custom
overrides that it was doing before.

But then Windows doesn't have struct passwd, so this patch sprinkles
some additional #ifdef WIN32 around to make it work.  This is similar
to existing code that deals with this issue.

Reviewed-by: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Discussion: https://www.postgresql.org/message-id/5974caea-1267-7708-40f2-6009a9d653b0@2ndquadrant.com

1 files changed, 15 insertions, 21 deletions

diff --git a/configure b/configure
index 3d9bd0bdf8..de431d0d38 100755
--- a/configure
+++ b/configure
@@ -15685,6 +15685,19 @@ esac
 
 fi
 
+ac_fn_c_check_func "$LINENO" "getpeereid" "ac_cv_func_getpeereid"
+if test "x$ac_cv_func_getpeereid" = xyes; then :
+  $as_echo "#define HAVE_GETPEEREID 1" >>confdefs.h
+
+else
+  case " $LIBOBJS " in
+  *" getpeereid.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS getpeereid.$ac_objext"
+ ;;
+esac
+
+fi
+
 ac_fn_c_check_func "$LINENO" "getrusage" "ac_cv_func_getrusage"
 if test "x$ac_cv_func_getrusage" = xyes; then :
   $as_echo "#define HAVE_GETRUSAGE 1" >>confdefs.h
@@ -15863,19 +15876,13 @@ $as_echo "$as_me: On $host_os we will use our strtof wrapper." >&6;}
 esac
 
 case $host_os in
-
         # Windows uses a specialised env handler
-        # and doesn't need a replacement getpeereid because it doesn't use
-        # Unix sockets.
         mingw*)
 
 $as_echo "#define HAVE_UNSETENV 1" >>confdefs.h
 
-
-$as_echo "#define HAVE_GETPEEREID 1" >>confdefs.h
-
                 ac_cv_func_unsetenv=yes
-                ac_cv_func_getpeereid=yes;;
+                ;;
         *)
                 ac_fn_c_check_func "$LINENO" "unsetenv" "ac_cv_func_unsetenv"
 if test "x$ac_cv_func_unsetenv" = xyes; then :
@@ -15890,21 +15897,8 @@ esac
 
 fi
 
-ac_fn_c_check_func "$LINENO" "getpeereid" "ac_cv_func_getpeereid"
-if test "x$ac_cv_func_getpeereid" = xyes; then :
-  $as_echo "#define HAVE_GETPEEREID 1" >>confdefs.h
 
-else
-  case " $LIBOBJS " in
-  *" getpeereid.$ac_objext "* ) ;;
-  *) LIBOBJS="$LIBOBJS getpeereid.$ac_objext"
- ;;
-esac
-
-fi
-
-
-		;;
+                ;;
 esac
 
 # System's version of getaddrinfo(), if any, may be used only if we found