Add support for POSIX.1-2008 functions dprintf(3) and vdprintf(3).

Feedback from millert@ guenther@
OK guenther@ man page bits OK jmc@

5 files changed, 155 insertions, 8 deletions

diff --git a/lib/libc/stdio/Makefile.inc b/lib/libc/stdio/Makefile.inc
index bf8cd0e38f5..caee57667a0 100644
--- a/lib/libc/stdio/Makefile.inc
+++ b/lib/libc/stdio/Makefile.inc
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile.inc,v 1.22 2012/03/21 23:44:35 fgsch Exp $
+#	$OpenBSD: Makefile.inc,v 1.23 2013/01/30 00:08:13 brad Exp $
 
 # stdio sources
 .PATH: ${LIBCSRCDIR}/stdio
@@ -19,7 +19,7 @@ SRCS+=	asprintf.c clrerr.c fclose.c fdopen.c feof.c ferror.c fflush.c fgetc.c \
 	putwc.c putwchar.c ungetwc.c \
 	fwprintf.c swprintf.c vfwprintf.c vswprintf.c vwprintf.c wprintf.c \
 	fwscanf.c swscanf.c vfwscanf.c vswscanf.c vwscanf.c wscanf.c \
-	getdelim.c getline.c
+	getdelim.c getline.c dprintf.c vdprintf.c
 
 MAN+=	fclose.3 ferror.3 fflush.3 fgetln.3 fgets.3 fopen.3 fputs.3 \
 	fread.3 fseek.3 funopen.3 getc.3 mktemp.3 perror.3 printf.3 putc.3 \
@@ -43,7 +43,8 @@ MLINKS+=mktemp.3 mkdtemp.3
 MLINKS+=mktemp.3 mkstemps.3
 MLINKS+=printf.3 fprintf.3 printf.3 snprintf.3 printf.3 sprintf.3 \
 	printf.3 vfprintf.3 printf.3 vprintf.3 printf.3 vsnprintf.3 \
-	printf.3 vsprintf.3 printf.3 asprintf.3 printf.3 vasprintf.3
+	printf.3 vsprintf.3 printf.3 asprintf.3 printf.3 vasprintf.3 \
+	printf.3 dprintf.3 printf.3 vdprintf.3
 MLINKS+=putc.3 fputc.3 putc.3 putchar.3 putc.3 putw.3
 MLINKS+=scanf.3 fscanf.3 scanf.3 sscanf.3 scanf.3 vfscanf.3 scanf.3 vscanf.3 \
 	scanf.3 vsscanf.3
diff --git a/lib/libc/stdio/dprintf.c b/lib/libc/stdio/dprintf.c
new file mode 100644
index 00000000000..dbf7d3457ff
--- /dev/null
+++ b/lib/libc/stdio/dprintf.c
@@ -0,0 +1,48 @@
+/*	$OpenBSD: dprintf.c,v 1.1 2013/01/30 00:08:13 brad Exp $	*/
+/*	$FreeBSD: src/lib/libc/stdio/dprintf.c,v 1.2 2012/11/17 01:49:39 svnexp Exp $	*/
+
+/*-
+ * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+
+int
+dprintf(int fd, const char * __restrict fmt, ...)
+{
+	va_list ap;
+	int ret;
+
+	va_start(ap, fmt);
+	ret = vdprintf(fd, fmt, ap);
+	va_end(ap);
+	return ret;
+}
diff --git a/lib/libc/stdio/printf.3 b/lib/libc/stdio/printf.3
index 01307ba9fa7..61767cd4784 100644
--- a/lib/libc/stdio/printf.3
+++ b/lib/libc/stdio/printf.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: printf.3,v 1.59 2011/09/03 22:59:07 jmc Exp $
+.\"	$OpenBSD: printf.3,v 1.60 2013/01/30 00:08:13 brad Exp $
 .\"
 .\" Copyright (c) 1990, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -33,7 +33,7 @@
 .\"
 .\"     @(#)printf.3	8.1 (Berkeley) 6/4/93
 .\"
-.Dd $Mdocdate: September 3 2011 $
+.Dd $Mdocdate: January 30 2013 $
 .Dt PRINTF 3
 .Os
 .Sh NAME
@@ -42,11 +42,13 @@
 .Nm sprintf ,
 .Nm snprintf ,
 .Nm asprintf ,
+.Nm dprintf ,
 .Nm vprintf ,
 .Nm vfprintf ,
 .Nm vsprintf ,
 .Nm vsnprintf ,
-.Nm vasprintf
+.Nm vasprintf ,
+.Nm vdprintf
 .Nd formatted output conversion
 .Sh SYNOPSIS
 .Fd #include <stdio.h>
@@ -60,6 +62,8 @@
 .Fn snprintf "char *str" "size_t size" "const char *format" ...
 .Ft int
 .Fn asprintf "char **ret" "const char *format" ...
+.Ft int
+.Fn dprintf "int fd" "const char * restrict format" ...
 .Fd #include <stdarg.h>
 .Ft int
 .Fn vprintf "const char *format" "va_list ap"
@@ -71,6 +75,8 @@
 .Fn vsnprintf "char *str" "size_t size" "const char *format" "va_list ap"
 .Ft int
 .Fn vasprintf "char **ret" "const char *format" "va_list ap"
+.Ft int
+.Fn vdprintf "int fd" "const char * restrict format" "va_list ap"
 .Sh DESCRIPTION
 The
 .Fn printf
@@ -95,6 +101,10 @@ and
 .Fn vfprintf
 write output to the supplied stream pointer
 .Fa stream ;
+.Fn dprintf
+and
+.Fn vdprintf
+write output to the given file descriptor;
 .Fn sprintf ,
 .Fn snprintf ,
 .Fn vsprintf ,
@@ -754,6 +764,12 @@ and
 .Fn vsprintf
 functions conform to
 .St -ansiC .
+The
+.Fn dprintf
+and
+.Fn vdprintf
+functions conform to
+.St -p1003.1-2008 .
 .Sh HISTORY
 The functions
 .Fn snprintf
@@ -769,6 +785,13 @@ and
 first appeared in the GNU C library.
 This implementation first appeared in
 .Ox 2.3 .
+.Pp
+The functions
+.Fn dprintf
+and
+.Fn vdprintf
+first appeared in
+.Ox 5.3 .
 .Sh CAVEATS
 The conversion formats
 .Cm \&%D ,
diff --git a/lib/libc/stdio/stdio.3 b/lib/libc/stdio/stdio.3
index 381dc7fe5af..51a7adf28dd 100644
--- a/lib/libc/stdio/stdio.3
+++ b/lib/libc/stdio/stdio.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: stdio.3,v 1.23 2012/04/12 08:26:38 jmc Exp $
+.\"	$OpenBSD: stdio.3,v 1.24 2013/01/30 00:08:13 brad Exp $
 .\"
 .\" Copyright (c) 1990, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: April 12 2012 $
+.Dd $Mdocdate: January 30 2013 $
 .Dt STDIO 3
 .Os
 .Sh NAME
@@ -210,6 +210,7 @@ definitions are explicitly removed.
 .It Sy Function Ta Sy Description
 .It asprintf Ta "formatted output conversion with allocation"
 .It clearerr Ta "check and reset stream status"
+.It dprintf Ta "formatted output conversion"
 .It fclose Ta "close a stream"
 .It fdopen Ta "stream open functions"
 .It feof Ta "check and reset stream status"
@@ -267,6 +268,7 @@ definitions are explicitly removed.
 .It tmpnam Ta "temporary file routines"
 .It ungetc Ta "un-get character from input stream"
 .It vasprintf Ta "formatted output conversion with allocation"
+.It vdprintf Ta "formatted output conversion"
 .It vfprintf Ta "formatted output conversion"
 .It vfscanf Ta "input format conversion"
 .It vprintf Ta "formatted output conversion"
diff --git a/lib/libc/stdio/vdprintf.c b/lib/libc/stdio/vdprintf.c
new file mode 100644
index 00000000000..49c19697710
--- /dev/null
+++ b/lib/libc/stdio/vdprintf.c
@@ -0,0 +1,73 @@
+/*	$OpenBSD: vdprintf.c,v 1.1 2013/01/30 00:08:13 brad Exp $	*/
+/*	$FreeBSD: src/lib/libc/stdio/vdprintf.c,v 1.4 2012/11/17 01:49:40 svnexp Exp $ */
+
+/*-
+ * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "local.h"
+
+static int
+__dwrite(void *cookie, const char *buf, int n)
+{
+	int *fdp = cookie;
+	return (write(*fdp, buf, n));
+}
+
+int
+vdprintf(int fd, const char * __restrict fmt, va_list ap)
+{
+	FILE f;
+	struct __sfileext fext;
+	unsigned char buf[BUFSIZ];
+	int ret;
+
+	_FILEEXT_SETUP(&f, &fext);
+
+	f._p = buf;
+	f._w = sizeof(buf);
+	f._flags = __SWR;
+	f._file = -1;
+	f._bf._base = buf;
+	f._bf._size = sizeof(buf);
+	f._cookie = &fd;
+	f._write = __dwrite;
+
+	if ((ret = __vfprintf(&f, fmt, ap)) < 0)
+		return ret;
+
+	return fflush(&f) ? EOF : ret;
+}