Port recent close-on-exec changes to Cygwin.

* lib/binary-io.c, lib/binary-io.h: New files.
Merge from gnulib, incorporating:
2013-07-09 accept4, dup3, pipe2: port to Cygwin
* lib/pipe2.c: Update from gnulib, as part of this merge.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.

Fixes: debbugs:14821

ChangeLog

@@ -1,5 +1,12 @@
 2013-07-09  Paul Eggert  <eggert@cs.ucla.edu>
 
+	Port recent close-on-exec changes to Cygwin (Bug#14821).
+	* lib/binary-io.c, lib/binary-io.h: New files.
+	Merge from gnulib, incorporating:
+	2013-07-09 accept4, dup3, pipe2: port to Cygwin
+	* lib/pipe2.c: Update from gnulib, as part of this merge.
+	* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
+
 	Handle errno and exit status a bit more carefully.
 	* lib/ignore-value.h: Remove this gnulib-imported file.
 	* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.

admin/ChangeLog

@@ -1,5 +1,8 @@
 2013-07-09  Paul Eggert  <eggert@cs.ucla.edu>
 
+	Port recent close-on-exec changes to Cygwin (Bug#14821).
+	* merge-gnulib (GNULIB_TOOL_FLAGS): Don't avoid binary-io.
+
 	Handle error numbers a bit more reliably.
 	* merge-gnulib (GNULIB_MODULES): Remove ignore-value.
 

admin/merge-gnulib

@@ -41,7 +41,7 @@ GNULIB_MODULES='
 '
 
 GNULIB_TOOL_FLAGS='
-  --avoid=binary-io --avoid=close --avoid=dup
+  --avoid=close --avoid=dup
   --avoid=fchdir --avoid=fstat
   --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow
   --avoid=open --avoid=openat-die --avoid=opendir

lib/binary-io.c

@@ -0,0 +1,3 @@
+#include <config.h>
+#define BINARY_IO_INLINE _GL_EXTERN_INLINE
+#include "binary-io.h"

lib/binary-io.h

@@ -0,0 +1,72 @@
+/* Binary mode I/O.
+   Copyright (C) 2001, 2003, 2005, 2008-2013 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
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef _BINARY_H
+#define _BINARY_H
+
+/* For systems that distinguish between text and binary I/O.
+   O_BINARY is guaranteed by the gnulib <fcntl.h>. */
+#include <fcntl.h>
+
+/* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...',
+   so we include it here first.  */
+#include <stdio.h>
+
+_GL_INLINE_HEADER_BEGIN
+#ifndef BINARY_IO_INLINE
+# define BINARY_IO_INLINE _GL_INLINE
+#endif
+
+/* set_binary_mode (fd, mode)
+   sets the binary/text I/O mode of file descriptor fd to the given mode
+   (must be O_BINARY or O_TEXT) and returns the previous mode.  */
+#if O_BINARY
+# if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__
+#  include <io.h> /* declares setmode() */
+#  define set_binary_mode setmode
+# else
+#  define set_binary_mode _setmode
+#  undef fileno
+#  define fileno _fileno
+# endif
+#else
+  /* On reasonable systems, binary I/O is the only choice.  */
+  /* Use a function rather than a macro, to avoid gcc warnings
+     "warning: statement with no effect".  */
+BINARY_IO_INLINE int
+set_binary_mode (int fd, int mode)
+{
+  (void) fd;
+  (void) mode;
+  return O_BINARY;
+}
+#endif
+
+/* SET_BINARY (fd);
+   changes the file descriptor fd to perform binary I/O.  */
+#ifdef __DJGPP__
+# include <unistd.h> /* declares isatty() */
+  /* Avoid putting stdin/stdout in binary mode if it is connected to
+     the console, because that would make it impossible for the user
+     to interrupt the program through Ctrl-C or Ctrl-Break.  */
+# define SET_BINARY(fd) ((void) (!isatty (fd) ? (set_binary_mode (fd, O_BINARY), 0) : 0))
+#else
+# define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY))
+#endif
+
+_GL_INLINE_HEADER_END
+
+#endif /* _BINARY_H */

lib/gnulib.mk

@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=binary-io --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=sigprocmask --avoid=sys_types --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt c-ctype c-strcase careadlinkat close-stream crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday intprops largefile lstat manywarnings memrchr mktime pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat sig2str socklen stat-time stdalign stdarg stdbool stdio strftime strtoimax strtoumax symlink sys_stat sys_time time timer-time timespec-add timespec-sub unsetenv utimens warnings
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=sigprocmask --avoid=sys_types --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt c-ctype c-strcase careadlinkat close-stream crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday intprops largefile lstat manywarnings memrchr mktime pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat sig2str socklen stat-time stdalign stdarg stdbool stdio strftime strtoimax strtoumax symlink sys_stat sys_time time timer-time timespec-add timespec-sub unsetenv utimens warnings
 
 
 MOSTLYCLEANFILES += core *.stackdump
@@ -75,6 +75,12 @@ EXTRA_libgnu_a_SOURCES += openat-proc.c
 
 ## end   gnulib module at-internal
 
+## begin gnulib module binary-io
+
+libgnu_a_SOURCES += binary-io.h binary-io.c
+
+## end   gnulib module binary-io
+
 ## begin gnulib module c-ctype
 
 libgnu_a_SOURCES += c-ctype.h c-ctype.c

lib/pipe2.c

@@ -22,10 +22,7 @@
 #include <errno.h>
 #include <fcntl.h>
 
-#if GNULIB_BINARY_IO
-# include "binary-io.h"
-#endif
-
+#include "binary-io.h"
 #include "verify.h"
 
 #if GNULIB_defined_O_NONBLOCK
@@ -141,13 +138,13 @@ pipe2 (int fd[2], int flags)
 # if O_BINARY
   if (flags & O_BINARY)
     {
-      setmode (fd[1], O_BINARY);
-      setmode (fd[0], O_BINARY);
+      set_binary_mode (fd[1], O_BINARY);
+      set_binary_mode (fd[0], O_BINARY);
     }
   else if (flags & O_TEXT)
     {
-      setmode (fd[1], O_TEXT);
-      setmode (fd[0], O_TEXT);
+      set_binary_mode (fd[1], O_TEXT);
+      set_binary_mode (fd[0], O_TEXT);
     }
 # endif
 

m4/gnulib-comp.m4

@@ -41,6 +41,7 @@ AC_DEFUN([gl_EARLY],
   # Code from module alloca-opt:
   # Code from module allocator:
   # Code from module at-internal:
+  # Code from module binary-io:
   # Code from module c-ctype:
   # Code from module c-strcase:
   # Code from module careadlinkat:
@@ -754,6 +755,8 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/allocator.c
   lib/allocator.h
   lib/at-func.c
+  lib/binary-io.c
+  lib/binary-io.h
   lib/c-ctype.c
   lib/c-ctype.h
   lib/c-strcase.h