+2009-08-22 Bruno Haible <bruno@clisp.org>
+
+ New module 'pipe2'.
+ * lib/unistd.in.h (pipe2): New declaration.
+ * lib/pipe2.c: New file.
+ * m4/pipe2.m4: New file.
+ * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize GNULIB_PIPE2 and
+ HAVE_PIPE2.
+ * modules/unistd (Makefile.am): Substitute GNULIB_PIPE2 and HAVE_PIPE2.
+ * modules/pipe2: New file.
+ * doc/glibc-functions/pipe2.texi: Mention the new module.
+
2009-08-22 Bruno Haible <bruno@clisp.org>
Reference some new glibc functions.
@subsection @code{pipe2}
@findex pipe2
-Gnulib module: ---
+Gnulib module: pipe2
Portability problems fixed by Gnulib:
@itemize
+@item
+This function is missing on all non-glibc platforms:
+MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5, BeOS.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
-@item
-This function is missing on all non-glibc platforms:
-MacOS X 10.3, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, Interix 3.5, BeOS.
@end itemize
--- /dev/null
+/* Create a pipe, with specific opening flags.
+ Copyright (C) 2009 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 2, 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, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include <config.h>
+
+/* Specification. */
+#include <unistd.h>
+
+#include <errno.h>
+#include <fcntl.h>
+
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* Native Woe32 API. */
+
+# include <io.h>
+
+int
+pipe2 (int fd[2], int flags)
+{
+ /* Check the supported flags. */
+ if ((flags & ~(O_CLOEXEC | O_BINARY | O_TEXT)) != 0)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ return _pipe (fd, 4096, flags);
+}
+
+#else
+/* Unix API. */
+
+# ifndef O_CLOEXEC
+# define O_CLOEXEC 0
+# endif
+
+int
+pipe2 (int fd[2], int flags)
+{
+ /* Check the supported flags. */
+ if ((flags & ~(O_CLOEXEC | O_NONBLOCK)) != 0)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (pipe (fd) < 0)
+ return -1;
+
+ /* POSIX <http://www.opengroup.org/onlinepubs/9699919799/functions/pipe.html>
+ says that initially, the O_NONBLOCK and FD_CLOEXEC flags are cleared on
+ both fd[0] amd fd[1]. */
+
+ if (flags & O_NONBLOCK)
+ {
+ int fcntl_flags;
+
+ if ((fcntl_flags = fcntl (fd[1], F_GETFL, 0)) < 0
+ || fcntl (fd[1], F_SETFL, fcntl_flags | O_NONBLOCK) < 0
+ || (fcntl_flags = fcntl (fd[0], F_GETFL, 0)) < 0
+ || fcntl (fd[0], F_SETFL, fcntl_flags | O_NONBLOCK) < 0)
+ goto fail;
+ }
+
+ if (flags & O_CLOEXEC)
+ {
+ int fcntl_flags;
+
+ if ((fcntl_flags = fcntl (fd[1], F_GETFD, 0)) < 0
+ || fcntl (fd[1], F_SETFD, fcntl_flags | FD_CLOEXEC) < 0
+ || (fcntl_flags = fcntl (fd[0], F_GETFD, 0)) < 0
+ || fcntl (fd[0], F_SETFD, fcntl_flags | FD_CLOEXEC) < 0)
+ goto fail;
+ }
+
+ return 0;
+
+ fail:
+ {
+ int saved_errno = errno;
+ close (fd[0]);
+ close (fd[1]);
+ errno = saved_errno;
+ return -1;
+ }
+}
+
+#endif
#endif
+#if @GNULIB_PIPE2@
+/* Create a pipe, applying the given flags when opening the read-end of the
+ pipe and the write-end of the pipe.
+ The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+ and O_TEXT, O_BINARY (defined in "binary-io.h").
+ Store the read-end as fd[0] and the write-end as fd[1].
+ Return 0 upon success, or -1 with errno set upon failure. */
+# if !@HAVE_PIPE2@
+extern int pipe2 (int fd[2], int flags);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef pipe2
+# define pipe2(f,o) \
+ (GL_LINK_WARNING ("pipe2 is unportable - " \
+ "use gnulib module pipe2 for portability"), \
+ pipe2 (f, o))
+#endif
+
+
#if @GNULIB_READLINK@
/* Read the contents of the symbolic link FILE and place the first BUFSIZE
bytes of it into BUF. Return the number of bytes placed into BUF if
--- /dev/null
+# pipe2.m4 serial 1
+dnl Copyright (C) 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_PIPE2],
+[
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+ dnl Persuade glibc <unistd.h> to declare pipe2().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_FUNCS_ONCE([pipe2])
+ if test $ac_cv_func_pipe2 != yes; then
+ HAVE_PIPE2=0
+ AC_LIBOBJ([pipe2])
+ fi
+])
-# unistd_h.m4 serial 19
+# unistd_h.m4 serial 20
dnl Copyright (C) 2006-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
GNULIB_LCHOWN=0; AC_SUBST([GNULIB_LCHOWN])
GNULIB_LINK=0; AC_SUBST([GNULIB_LINK])
GNULIB_LSEEK=0; AC_SUBST([GNULIB_LSEEK])
+ GNULIB_PIPE2=0; AC_SUBST([GNULIB_PIPE2])
GNULIB_READLINK=0; AC_SUBST([GNULIB_READLINK])
GNULIB_SLEEP=0; AC_SUBST([GNULIB_SLEEP])
GNULIB_UNISTD_H_GETOPT=0; AC_SUBST([GNULIB_UNISTD_H_GETOPT])
HAVE_GETPAGESIZE=1; AC_SUBST([HAVE_GETPAGESIZE])
HAVE_GETUSERSHELL=1; AC_SUBST([HAVE_GETUSERSHELL])
HAVE_LINK=1; AC_SUBST([HAVE_LINK])
+ HAVE_PIPE2=1; AC_SUBST([HAVE_PIPE2])
HAVE_READLINK=1; AC_SUBST([HAVE_READLINK])
HAVE_SLEEP=1; AC_SUBST([HAVE_SLEEP])
HAVE_DECL_ENVIRON=1; AC_SUBST([HAVE_DECL_ENVIRON])
--- /dev/null
+Description:
+pipe2() function: create a pipe, with specific opening flags.
+
+Files:
+lib/pipe2.c
+m4/pipe2.m4
+
+Depends-on:
+unistd
+fcntl
+binary-io
+
+configure.ac:
+gl_FUNC_PIPE2
+gl_UNISTD_MODULE_INDICATOR([pipe2])
+
+Makefile.am:
+
+Include:
+<unistd.h>
+
+License:
+GPL
+
+Maintainer:
+Bruno Haible, Eric Blake
-e 's|@''GNULIB_LCHOWN''@|$(GNULIB_LCHOWN)|g' \
-e 's|@''GNULIB_LINK''@|$(GNULIB_LINK)|g' \
-e 's|@''GNULIB_LSEEK''@|$(GNULIB_LSEEK)|g' \
+ -e 's|@''GNULIB_PIPE2''@|$(GNULIB_PIPE2)|g' \
-e 's|@''GNULIB_READLINK''@|$(GNULIB_READLINK)|g' \
-e 's|@''GNULIB_SLEEP''@|$(GNULIB_SLEEP)|g' \
-e 's|@''GNULIB_UNISTD_H_GETOPT''@|$(GNULIB_UNISTD_H_GETOPT)|g' \
-e 's|@''HAVE_GETPAGESIZE''@|$(HAVE_GETPAGESIZE)|g' \
-e 's|@''HAVE_GETUSERSHELL''@|$(HAVE_GETUSERSHELL)|g' \
-e 's|@''HAVE_LINK''@|$(HAVE_LINK)|g' \
+ -e 's|@''HAVE_PIPE2''@|$(HAVE_PIPE2)|g' \
-e 's|@''HAVE_READLINK''@|$(HAVE_READLINK)|g' \
-e 's|@''HAVE_SLEEP''@|$(HAVE_SLEEP)|g' \
-e 's|@''HAVE_DECL_ENVIRON''@|$(HAVE_DECL_ENVIRON)|g' \
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