* modules/getloadavg (Files): Add m4/getloadavg.m4.

(configure.ac): AC_FUNC_GETLOADAVG -> gl_GETLOADAVG, as
the former is now obsolescent.
* lib/getloadavg.c [defined gl_GETLOADAVG]: Don't include config.h
or stdbool.h, because they might not exist while configuring.
* m4/fnmatch.m4: Add comment that Autoconf AC_FUNC_FNMATCH is
obsolescent, and programs should use gnulib instead.
* m4/getloadavg.m4: New file, with contents taken from Autoconf
but with prefixes changed.

7 files changed, 198 insertions, 8 deletions

diff --git a/ChangeLog b/ChangeLog
index 8329b5d86b..93a5cca70f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2006-08-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* modules/getloadavg (Files): Add m4/getloadavg.m4.
+	(configure.ac): AC_FUNC_GETLOADAVG -> gl_GETLOADAVG, as
+	the former is now obsolescent.
+
+	* modules/chdir-long (Depends-on): Add fcntl.
+
 2006-08-31  Eric Blake  <ebb9@byu.net>
 
 	* gnulib-tool: Don't let emacs change spaces to TAB.
diff --git a/lib/ChangeLog b/lib/ChangeLog
index ee0895f8b9..448b0b1333 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,13 @@
+2006-08-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* getloadavg.c [defined gl_GETLOADAVG]: Don't include config.h
+	or stdbool.h, because they might not exist while configuring.
+
+	* chdir-long.c: Include <fcntl.h>, for O_DIRECTORY.
+	Don't include unistd.h or limits.h; not needed, since chdir-long.h
+	does that for us.
+	(O_DIRECTORY): Remove.
+
 2006-08-30  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Work around a bug in both the Linux and SunOS 64-bit kernels:
diff --git a/lib/getloadavg.c b/lib/getloadavg.c
index 6879527150..b2b161000e 100644
--- a/lib/getloadavg.c
+++ b/lib/getloadavg.c
@@ -1,7 +1,8 @@
 /* Get the system load averages.
 
    Copyright (C) 1985, 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994,
-   1995, 1997, 1999, 2000, 2003, 2004, 2005 Free Software Foundation, Inc.
+   1995, 1997, 1999, 2000, 2003, 2004, 2005, 2006 Free Software
+   Foundation, Inc.
 
    NOTE: The canonical source of this file is maintained with gnulib.
    Bugs can be reported to bug-gnulib@gnu.org.
@@ -80,13 +81,20 @@
    We also #define LDAV_PRIVILEGED if a program will require
    special installation to be able to call getloadavg.  */
 
-/* This should always be first.  */
+/* "configure" defines gl_GETLOADAVG to sidestep problems with
+   partially-configured source directories.  */
+
 #ifdef HAVE_CONFIG_H
-# include <config.h>
+# ifndef gl_GETLOADAVG
+#  include <config.h>
+# endif
+#endif
+
+#ifndef gl_GETLOADAVG
+# include <stdbool.h>
 #endif
 
 #include <errno.h>
-#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/m4/ChangeLog b/m4/ChangeLog
index 8f92897ab8..4a273483cd 100644
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,10 @@
+2006-08-31  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* fnmatch.m4: Add comment that Autoconf AC_FUNC_FNMATCH is
+	obsolescent, and programs should use gnulib instead.
+	* getloadavg.m4: New file, with contents taken from Autoconf
+	but with prefixes changed.
+
 2006-08-30  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Work around a bug in both the Linux and SunOS 64-bit kernels:
diff --git a/m4/fnmatch.m4 b/m4/fnmatch.m4
index ce94c84a70..d638f67a80 100644
--- a/m4/fnmatch.m4
+++ b/m4/fnmatch.m4
@@ -1,14 +1,14 @@
 # Check for fnmatch.
 
-# This is a modified version of autoconf's AC_FUNC_FNMATCH.
-# This file should be simplified after Autoconf 2.57 is required.
-
 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
 # Foundation, Inc.
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
+# Autoconf defines AC_FUNC_FNMATCH, but that is obsolescent.
+# New applications should use the macros below instead.
+
 # _AC_FUNC_FNMATCH_IF(STANDARD = GNU | POSIX, CACHE_VAR, IF-TRUE, IF-FALSE)
 # -------------------------------------------------------------------------
 # If a STANDARD compliant fnmatch is found, run IF-TRUE, otherwise
diff --git a/m4/getloadavg.m4 b/m4/getloadavg.m4
new file mode 100644
index 0000000000..33ec478b24
--- /dev/null
+++ b/m4/getloadavg.m4
@@ -0,0 +1,156 @@
+# Check for getloadavg.
+
+# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2002, 2003,
+# 2006 Free Software Foundation, Inc.
+
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent.
+# New applications should use gl_GETLOADAVG instead.
+
+# gl_PREREQ_GETLOADAVG
+# --------------------
+# Set up the AC_LIBOBJ replacement of `getloadavg'.
+m4_define([gl_PREREQ_GETLOADAVG],
+[AC_LIBOBJ(getloadavg)
+AC_DEFINE(C_GETLOADAVG, 1, [Define to 1 if using `getloadavg.c'.])
+# Figure out what our getloadavg.c needs.
+gl_have_func=no
+AC_CHECK_HEADER(sys/dg_sys_info.h,
+[gl_have_func=yes
+ AC_DEFINE(DGUX, 1, [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
+ AC_CHECK_LIB(dgc, dg_sys_info)])
+
+# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
+# uses stabs), but it is still SVR4.  We cannot check for <elf.h> because
+# Irix 4.0.5F has the header but not the library.
+if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
+  gl_have_func=yes
+  AC_DEFINE(SVR4, 1, [Define to 1 on System V Release 4.])
+fi
+
+if test $gl_have_func = no; then
+  AC_CHECK_HEADER(inq_stats/cpustats.h,
+  [gl_have_func=yes
+   AC_DEFINE(UMAX, 1, [Define to 1 for Encore UMAX.])
+   AC_DEFINE(UMAX4_3, 1,
+	     [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
+	      instead of <sys/cpustats.h>.])])
+fi
+
+if test $gl_have_func = no; then
+  AC_CHECK_HEADER(sys/cpustats.h,
+  [gl_have_func=yes; AC_DEFINE(UMAX)])
+fi
+
+if test $gl_have_func = no; then
+  AC_CHECK_HEADERS(mach/mach.h)
+fi
+
+AC_CHECK_HEADERS(nlist.h,
+[AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
+		  [AC_DEFINE(NLIST_NAME_UNION, 1,
+			     [Define to 1 if your `struct nlist' has an
+			      `n_un' member.  Obsolete, depend on
+			      `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
+		  [@%:@include <nlist.h>])
+])dnl
+])# gl_PREREQ_GETLOADAVG
+
+
+# gl_GETLOADAVG
+# -------------
+AN_FUNCTION([getloadavg], [gl_GETLOADAVG])
+AC_DEFUN([gl_GETLOADAVG],
+[gl_have_func=no # yes means we've found a way to get the load average.
+
+# Make sure getloadavg.c is where it belongs, at configure-time.
+test -f "$srcdir/$ac_config_libobj_dir/getloadavg.c" ||
+  AC_MSG_ERROR([$srcdir/$ac_config_libobj_dir/getloadavg.c is missing])
+
+gl_save_LIBS=$LIBS
+
+# Check for getloadavg, but be sure not to touch the cache variable.
+(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && gl_have_func=yes
+
+# On HPUX9, an unprivileged user can get load averages through this function.
+AC_CHECK_FUNCS(pstat_getdynamic)
+
+# Solaris has libkstat which does not require root.
+AC_CHECK_LIB(kstat, kstat_open)
+test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
+
+# Some systems with -lutil have (and need) -lkvm as well, some do not.
+# On Solaris, -lkvm requires nlist from -lelf, so check that first
+# to get the right answer into the cache.
+# For kstat on solaris, we need libelf to force the definition of SVR4 below.
+if test $gl_have_func = no; then
+  AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
+fi
+if test $gl_have_func = no; then
+  AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
+  # Check for the 4.4BSD definition of getloadavg.
+  AC_CHECK_LIB(util, getloadavg,
+    [LIBS="-lutil $LIBS" gl_have_func=yes gl_cv_func_getloadavg_setgid=yes])
+fi
+
+if test $gl_have_func = no; then
+  # There is a commonly available library for RS/6000 AIX.
+  # Since it is not a standard part of AIX, it might be installed locally.
+  gl_getloadavg_LIBS=$LIBS
+  LIBS="-L/usr/local/lib $LIBS"
+  AC_CHECK_LIB(getloadavg, getloadavg,
+	       [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_getloadavg_LIBS])
+fi
+
+# Make sure it is really in the library, if we think we found it,
+# otherwise set up the replacement function.
+AC_CHECK_FUNCS(getloadavg, [],
+	       [gl_PREREQ_GETLOADAVG])
+
+# Some definitions of getloadavg require that the program be installed setgid.
+AC_CACHE_CHECK(whether getloadavg requires setgid,
+	       gl_cv_func_getloadavg_setgid,
+[AC_EGREP_CPP([Yowza Am I SETGID yet],
+[#define gl_GETLOADAVG
+#include "$srcdir/$ac_config_libobj_dir/getloadavg.c"
+#ifdef LDAV_PRIVILEGED
+Yowza Am I SETGID yet
+#endif
+],
+	      gl_cv_func_getloadavg_setgid=yes,
+	      gl_cv_func_getloadavg_setgid=no)])
+if test $gl_cv_func_getloadavg_setgid = yes; then
+  NEED_SETGID=true
+  AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
+	    [Define to 1 if the `getloadavg' function needs to be run setuid
+	     or setgid.])
+else
+  NEED_SETGID=false
+fi
+AC_SUBST(NEED_SETGID)dnl
+
+if test $gl_cv_func_getloadavg_setgid = yes; then
+  AC_CACHE_CHECK(group of /dev/kmem, gl_cv_group_kmem,
+[ # On Solaris, /dev/kmem is a symlink.  Get info on the real file.
+  ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
+  # If we got an error (system does not support symlinks), try without -L.
+  test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
+  gl_cv_group_kmem=`echo $ac_ls_output \
+    | sed -ne ['s/[	 ][	 ]*/ /g;
+	       s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\)  *.*/\1/;
+	       / /s/.* //;p;']`
+])
+  AC_SUBST(KMEM_GROUP, $gl_cv_group_kmem)dnl
+fi
+if test "x$gl_save_LIBS" = x; then
+  GETLOADAVG_LIBS=$LIBS
+else
+  GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_save_LIBS!!"`
+fi
+LIBS=$gl_save_LIBS
+
+AC_SUBST(GETLOADAVG_LIBS)dnl
+])# gl_GETLOADAVG
diff --git a/modules/getloadavg b/modules/getloadavg
index 75e3bfd08d..c5b2aefaa3 100644
--- a/modules/getloadavg
+++ b/modules/getloadavg
@@ -3,6 +3,7 @@ Return the current system load averages.
 
 Files:
 lib/getloadavg.c
+m4/getloadavg.m4
 
 Depends-on:
 cloexec
@@ -13,7 +14,7 @@ stdbool
 fcntl-safer
 
 configure.ac:
-AC_FUNC_GETLOADAVG
+gl_GETLOADAVG
 
 Makefile.am: