# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1299577859 -3600
# Node ID 70c46ee1fb5be6b7ee10cf53d5fb1d02c4120cbb
# Parent  6e0c19bf3f956c694c19ec3a679fba8bb39958a8
passfd module, part 1, tweaks.

* m4/afunix.m4 (gl_SOCKET_AFUNIX): Update AC_REQUIRE invocation.
Improve indentation. Improve AC_MSG_CHECKING messages.
* m4/sockpfaf.m4 (gl_SOCKET_FAMILY_UNIX): New macro, extracted from
gl_SOCKET_FAMILIES.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2011-03-08  Bruno Haible  <bruno@clisp.org>
+
+	passfd module, part 1, tweaks.
+	* m4/afunix.m4 (gl_SOCKET_AFUNIX): Update AC_REQUIRE invocation.
+	Improve indentation. Improve AC_MSG_CHECKING messages.
+	* m4/sockpfaf.m4 (gl_SOCKET_FAMILY_UNIX): New macro, extracted from
+	gl_SOCKET_FAMILIES.
+
 2011-03-07  Bastien Roucariès  <roucaries.bastien@gmail.com>
 
 	passfd module, part 1.
diff --git a/m4/afunix.m4 b/m4/afunix.m4
--- a/m4/afunix.m4
+++ b/m4/afunix.m4
@@ -1,4 +1,4 @@
-# afunix.m4 serial 1
+# afunix.m4 serial 2
 dnl Copyright (C) 2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,89 +7,106 @@
 AC_DEFUN([gl_SOCKET_AFUNIX],
 [
   AC_REQUIRE([gl_HEADER_SYS_SOCKET])
-  AC_REQUIRE([gl_SOCKET_FAMILIES])
+  AC_REQUIRE([gl_SOCKET_FAMILY_UNIX])
 
-  AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHT])
+  AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHTS])
   AC_CACHE_VAL([gl_cv_socket_unix_scm_rights],
-  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_SYS_UN_H
-#include <sys/un.h>
-#endif
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif
-]],
-[[struct cmsghdr cmh;
-  cmh.cmsg_level = SOL_SOCKET;
-  cmh.cmsg_type = SCM_RIGHTS;
-  if (&cmh) return 0;]])],
-  gl_cv_socket_unix_scm_rights=yes, gl_cv_socket_unix_scm_rights=no)])
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>
+            #ifdef HAVE_SYS_SOCKET_H
+            #include <sys/socket.h>
+            #endif
+            #ifdef HAVE_SYS_UN_H
+            #include <sys/un.h>
+            #endif
+            #ifdef HAVE_WINSOCK2_H
+            #include <winsock2.h>
+            #endif
+          ]],
+          [[struct cmsghdr cmh;
+            cmh.cmsg_level = SOL_SOCKET;
+            cmh.cmsg_type = SCM_RIGHTS;
+            if (&cmh) return 0;
+          ]])],
+       [gl_cv_socket_unix_scm_rights=yes],
+       [gl_cv_socket_unix_scm_rights=no])
+    ])
   AC_MSG_RESULT([$gl_cv_socket_unix_scm_rights])
   if test $gl_cv_socket_unix_scm_rights = yes; then
-    AC_DEFINE([HAVE_UNIXSOCKET_SCM_RIGHTS], [1], [Define to 1 if <sys/socket.h> defines SCM_RIGHTS.])
-  fi 
+    AC_DEFINE([HAVE_UNIXSOCKET_SCM_RIGHTS], [1],
+      [Define to 1 if <sys/socket.h> defines SCM_RIGHTS.])
+  fi
 
-  AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHT behave in BSD4.4 way])
+  AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHTS that behave in BSD4.4 way])
   AC_CACHE_VAL([gl_cv_socket_unix_scm_rights_bsd44_way],
-  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_SYS_UN_H
-#include <sys/un.h>
-#endif
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif
-]],
-[[struct msghdr msg = {0};
-  struct cmsghdr *cmsg;
-  int myfds[1] = {0};
-  char buf[CMSG_SPACE(sizeof(myfds))];
-  int *fdptr;
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>
+            #ifdef HAVE_SYS_SOCKET_H
+            #include <sys/socket.h>
+            #endif
+            #ifdef HAVE_SYS_UN_H
+            #include <sys/un.h>
+            #endif
+            #ifdef HAVE_WINSOCK2_H
+            #include <winsock2.h>
+            #endif
+            ]],
+            [[struct msghdr msg = {0};
+              struct cmsghdr *cmsg;
+              int myfds[1] = {0};
+              char buf[CMSG_SPACE (sizeof (myfds))];
+              int *fdptr;
 
-  msg.msg_control = buf;
-  msg.msg_controllen = sizeof buf;
-  cmsg = CMSG_FIRSTHDR(&msg);
-  cmsg->cmsg_level = SOL_SOCKET;
-  cmsg->cmsg_type = SCM_RIGHTS;
-  cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-  /* fake Initialize the payload: */
-  (void) CMSG_DATA(cmsg);
-  /* Sum of the length of all control messages in the buffer: */
-  msg.msg_controllen = cmsg->cmsg_len;
-  return 0;
-]])],
-  gl_cv_socket_unix_scm_rights_bsd44_way=yes, gl_cv_socket_unix_scm_rights_bsd44_way=no)])
+              msg.msg_control = buf;
+              msg.msg_controllen = sizeof buf;
+              cmsg = CMSG_FIRSTHDR (&msg);
+              cmsg->cmsg_level = SOL_SOCKET;
+              cmsg->cmsg_type = SCM_RIGHTS;
+              cmsg->cmsg_len = CMSG_LEN (sizeof (int));
+              /* fake Initialize the payload: */
+              (void) CMSG_DATA (cmsg);
+              /* Sum of the length of all control messages in the buffer: */
+              msg.msg_controllen = cmsg->cmsg_len;
+              return 0;
+            ]])],
+       [gl_cv_socket_unix_scm_rights_bsd44_way=yes],
+       [gl_cv_socket_unix_scm_rights_bsd44_way=no])
+    ])
   AC_MSG_RESULT([$gl_cv_socket_unix_scm_rights_bsd44_way])
   if test $gl_cv_socket_unix_scm_rights_bsd44_way = yes; then
-    AC_DEFINE([HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY], [1], [Define to 1 if fd could be send/received in the BSD4.4 way.])
+    AC_DEFINE([HAVE_UNIXSOCKET_SCM_RIGHTS_BSD44_WAY], [1],
+      [Define to 1 if fd can be sent/received in the BSD4.4 way.])
   fi
 
-  AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHT behave in BSD4.3 way])
+  AC_MSG_CHECKING([for UNIX domain sockets SCM_RIGHTS that behave in BSD4.3 way])
   AC_CACHE_VAL([gl_cv_socket_unix_scm_rights_bsd43_way],
-  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-#ifdef HAVE_SYS_UN_H
-#include <sys/un.h>
-#endif
-#ifdef HAVE_WINSOCK2_H
-#include <winsock2.h>
-#endif
-]],
-[[struct msghdr msg;
-  int fd = 0;
-  msg.msg_accrights = &fd;
-  msg.msg_accrightslen = sizeof(fd);
-  if (&msg) return 0;]])],
-  gl_cv_socket_unix_scm_rights_bsd43_way=yes, gl_cv_socket_unix_scm_rights_bsd43_way=no)])
+    [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <sys/types.h>
+            #ifdef HAVE_SYS_SOCKET_H
+            #include <sys/socket.h>
+            #endif
+            #ifdef HAVE_SYS_UN_H
+            #include <sys/un.h>
+            #endif
+            #ifdef HAVE_WINSOCK2_H
+            #include <winsock2.h>
+            #endif
+            ]],
+            [[struct msghdr msg;
+              int fd = 0;
+              msg.msg_accrights = &fd;
+              msg.msg_accrightslen = sizeof (fd);
+              if (&msg) return 0;
+            ]])],
+       [gl_cv_socket_unix_scm_rights_bsd43_way=yes],
+       [gl_cv_socket_unix_scm_rights_bsd43_way=no])
+    ])
   AC_MSG_RESULT([$gl_cv_socket_unix_scm_rights_bsd43_way])
   if test $gl_cv_socket_unix_scm_rights_bsd43_way = yes; then
-    AC_DEFINE([HAVE_UNIXSOCKET_SCM_RIGHTS_BSD43_WAY], [1], [Define to 1 if fd could be send/received in the BSD4.3 way.])
+    AC_DEFINE([HAVE_UNIXSOCKET_SCM_RIGHTS_BSD43_WAY], [1],
+      [Define to 1 if fd can be sent/received in the BSD4.3 way.])
   fi
 ])
diff --git a/m4/sockpfaf.m4 b/m4/sockpfaf.m4
--- a/m4/sockpfaf.m4
+++ b/m4/sockpfaf.m4
@@ -58,8 +58,13 @@
   if test $gl_cv_socket_ipv6 = yes; then
     AC_DEFINE([HAVE_IPV6], [1], [Define to 1 if <sys/socket.h> defines AF_INET6.])
   fi
+])
 
+AC_DEFUN([gl_SOCKET_FAMILY_UNIX],
+[
+  AC_REQUIRE([gl_HEADER_SYS_SOCKET])
   AC_CHECK_HEADERS_ONCE([sys/un.h])
+
   AC_MSG_CHECKING([for UNIX domain sockets])
   AC_CACHE_VAL([gl_cv_socket_unix],
     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>