more unistd improvements

[Paul Eggert]

I installed these I-hope-obvious improvements to the unistd module.
I didn't touch the modules Bruno maintains, which might also benefit
from the unistd module.

2006-03-07  Paul Eggert  <address@hidden>

        * MODULES.html.sh (Support for systems lacking POSIX:2001):
        Add unistd.
        * lib/c-stack.c: Include unistd.h unconditionally, since we now assume
        the unistd module.
        * lib/getlogin_r.c: Likewise.
        * lib/getlogin_r.h: Likewise.
        * lib/glob.c: Likewise.
        * lib/pagealign_alloc.c: Likewise.
        * lib/unistd_.h: Remove; no longer needed.

        * modules/c-stack (Depends-on): Add unistd.
        * modules/getlogin_r: Likewise.
        * modules/glob: Likewise.
        * modules/pagealign_alloc: Likewise.
        * modules/unistd (Files): Remove lib/unistd_.h.
        (EXTRA_DIST): Remove.
        (unistd.h): Create using 'echo' rather than 'cp', so that we don't
        need unistd_.h.
        (MOSTLYCLEANFILES): Remove unistd.h-t.

Index: MODULES.html.sh
===================================================================
RCS file: /cvsroot/gnulib/gnulib/MODULES.html.sh,v
retrieving revision 1.114
retrieving revision 1.115
diff -p -u -r1.114 -r1.115
--- MODULES.html.sh     26 Feb 2006 08:45:03 -0000      1.114
+++ MODULES.html.sh     8 Mar 2006 01:51:28 -0000       1.115
@@ -1798,6 +1798,7 @@ func_all_modules ()
   func_module rmdir
   func_module ssize_t
   func_module strtok_r
+  func_module unistd
   func_module utime
   func_end_table
 
Index: lib/c-stack.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/c-stack.c,v
retrieving revision 1.7
diff -p -u -r1.7 c-stack.c
--- lib/c-stack.c       19 Sep 2005 17:28:14 -0000      1.7
+++ lib/c-stack.c       8 Mar 2006 01:35:45 -0000
@@ -1,6 +1,6 @@
 /* Stack overflow handling.
 
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2006 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -77,9 +77,7 @@ typedef struct sigaltstack stack_t;
 # include <ucontext.h>
 #endif
 
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 #ifndef STDERR_FILENO
 # define STDERR_FILENO 2
 #endif
Index: lib/getlogin_r.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/getlogin_r.c,v
retrieving revision 1.4
diff -p -u -r1.4 getlogin_r.c
--- lib/getlogin_r.c    19 Sep 2005 17:28:14 -0000      1.4
+++ lib/getlogin_r.c    8 Mar 2006 01:35:45 -0000
@@ -26,10 +26,7 @@
 
 #include <errno.h>
 #include <string.h>
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #if !HAVE_DECL_GETLOGIN
 char *getlogin (void);
Index: lib/getlogin_r.h
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/getlogin_r.h,v
retrieving revision 1.5
diff -p -u -r1.5 getlogin_r.h
--- lib/getlogin_r.h    11 Jul 2005 11:21:55 -0000      1.5
+++ lib/getlogin_r.h    8 Mar 2006 01:35:45 -0000
@@ -19,10 +19,7 @@
 /* Written by Paul Eggert and Derek Price.  */
 
 #include <stddef.h>
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 /* Copies the user's login name to NAME.
    The array pointed to by NAME has room for SIZE bytes.
Index: lib/glob.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/glob.c,v
retrieving revision 1.4
diff -p -u -r1.4 glob.c
--- lib/glob.c  25 Feb 2006 07:57:37 -0000      1.4
+++ lib/glob.c  8 Mar 2006 01:35:45 -0000
@@ -34,13 +34,10 @@
 #include <stdio.h>             /* Needed on stupid SunOS for assert.  */
 
 #if !defined _LIBC || !defined GLOB_ONLY_P
-#if defined HAVE_UNISTD_H || defined _LIBC
-# include <unistd.h>
-# ifndef POSIX
-#  ifdef _POSIX_VERSION
-#   define POSIX
-#  endif
-# endif
+
+#include <unistd.h>
+#if !defined POSIX && defined _POSIX_VERSION
+# define POSIX
 #endif
 
 #include <pwd.h>
Index: lib/pagealign_alloc.c
===================================================================
RCS file: /cvsroot/gnulib/gnulib/lib/pagealign_alloc.c,v
retrieving revision 1.8
diff -p -u -r1.8 pagealign_alloc.c
--- lib/pagealign_alloc.c       2 Jul 2005 09:45:08 -0000       1.8
+++ lib/pagealign_alloc.c       8 Mar 2006 01:35:45 -0000
@@ -29,10 +29,7 @@
 #include <stdlib.h>
 
 #include <fcntl.h>
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 #if HAVE_MMAP
 # include <sys/mman.h>
Index: modules/c-stack
===================================================================
RCS file: /cvsroot/gnulib/gnulib/modules/c-stack,v
retrieving revision 1.5
diff -p -u -r1.5 c-stack
--- modules/c-stack     6 Jul 2005 15:58:47 -0000       1.5
+++ modules/c-stack     8 Mar 2006 01:35:45 -0000
@@ -9,6 +9,7 @@ m4/c-stack.m4
 Depends-on:
 gettext-h
 exitfail
+unistd
 
 configure.ac:
 gl_C_STACK
Index: modules/getlogin_r
===================================================================
RCS file: /cvsroot/gnulib/gnulib/modules/getlogin_r,v
retrieving revision 1.2
diff -p -u -r1.2 getlogin_r
--- modules/getlogin_r  29 May 2005 16:56:02 -0000      1.2
+++ modules/getlogin_r  8 Mar 2006 01:35:45 -0000
@@ -7,6 +7,7 @@ lib/getlogin_r.c
 m4/getlogin_r.m4
 
 Depends-on:
+unistd
 
 configure.ac:
 gl_GETLOGIN_R
Index: modules/glob
===================================================================
RCS file: /cvsroot/gnulib/gnulib/modules/glob,v
retrieving revision 1.3
diff -p -u -r1.3 glob
--- modules/glob        13 Sep 2005 03:47:45 -0000      1.3
+++ modules/glob        8 Mar 2006 01:35:45 -0000
@@ -19,6 +19,7 @@ restrict
 stat-macros
 stdbool
 strdup
+unistd
 
 configure.ac:
 gl_GLOB
Index: modules/pagealign_alloc
===================================================================
RCS file: /cvsroot/gnulib/gnulib/modules/pagealign_alloc,v
retrieving revision 1.3
diff -p -u -r1.3 pagealign_alloc
--- modules/pagealign_alloc     6 Jul 2005 15:58:47 -0000       1.3
+++ modules/pagealign_alloc     8 Mar 2006 01:35:45 -0000
@@ -13,6 +13,7 @@ exit
 getpagesize
 gettext-h
 xalloc
+unistd
 
 configure.ac:
 gl_PAGEALIGN_ALLOC
Index: modules/unistd
===================================================================
RCS file: /cvsroot/gnulib/gnulib/modules/unistd,v
retrieving revision 1.2
diff -p -u -r1.2 unistd
--- modules/unistd      7 Mar 2006 13:44:24 -0000       1.2
+++ modules/unistd      8 Mar 2006 01:35:45 -0000
@@ -2,7 +2,6 @@ Description:
 A <unistd.h> for systems lacking it.
 
 Files:
-lib/unistd_.h
 m4/unistd_h.m4
 
 Depends-on:
@@ -12,14 +11,12 @@ gl_HEADER_UNISTD
 
 Makefile.am:
 BUILT_SOURCES += $(UNISTD_H)
-EXTRA_DIST += unistd_.h
 
-# We need the following in order to create <unistd.h> when the system
-# doesn't have one.
-unistd.h: unistd_.h
-       cp $(srcdir)/unistd_.h address@hidden
-       mv address@hidden $@
-MOSTLYCLEANFILES += unistd.h unistd.h-t
+# We need the following in order to create an empty placeholder for
+# <unistd.h> when the system doesn't have one.
+unistd.h:
+       echo '/* Empty placeholder for address@hidden  */' >$@
+MOSTLYCLEANFILES += unistd.h
 
 Include:
 #include <unistd.h>