Add fcloseall() to libc. This removes the need to export _cleanup().

Linux also provides an fcloseall() implementation.

Discussed on:	arch

lib/libc/stdio/Makefile.inc

@@ -4,9 +4,9 @@
 # stdio sources
 .PATH: ${.CURDIR}/stdio
 
-SRCS+=	_flock_stub.c asprintf.c clrerr.c fclose.c fdopen.c feof.c ferror.c \
-	fflush.c fgetc.c fgetln.c fgetpos.c fgets.c fgetwc.c fgetwln.c \
-	fgetws.c \
+SRCS+=	_flock_stub.c asprintf.c clrerr.c fclose.c fcloseall.c fdopen.c \
+	feof.c ferror.c fflush.c fgetc.c fgetln.c fgetpos.c fgets.c fgetwc.c \
+	fgetwln.c fgetws.c \
 	fileno.c findfp.c flags.c fopen.c fprintf.c fpurge.c fputc.c fputs.c \
 	fputwc.c fputws.c fread.c freopen.c fscanf.c fseek.c fsetpos.c \
 	ftell.c funopen.c fvwrite.c fwalk.c fwide.c fwprintf.c fwscanf.c \
@@ -36,6 +36,7 @@ MAN+=	fclose.3 ferror.3 fflush.3 fgetln.3 fgets.3 fgetwln.3 fgetws.3 \
 	printf.3 putc.3 putwc.3 remove.3 scanf.3 setbuf.3 stdio.3 tmpnam.3 \
 	ungetc.3 ungetwc.3 wprintf.3 wscanf.3
 
+MLINKS+=fclose.3 fcloseall.3
 MLINKS+=ferror.3 ferror_unlocked.3 \
 	ferror.3 clearerr.3 ferror.3 clearerr_unlocked.3 \
 	ferror.3 feof.3 ferror.3 feof_unlocked.3 \

lib/libc/stdio/Symbol.map

@@ -7,6 +7,7 @@ FBSD_1.0 {
 	asprintf;
 	clearerr;
 	fclose;
+	fcloseall;
 	fdopen;
 	feof;
 	ferror;

lib/libc/stdio/fclose.3

@@ -40,7 +40,8 @@
 .Dt FCLOSE 3
 .Os
 .Sh NAME
-.Nm fclose
+.Nm fclose ,
+.Nm fcloseall
 .Nd close a stream
 .Sh LIBRARY
 .Lb libc
@@ -48,6 +49,8 @@
 .In stdio.h
 .Ft int
 .Fn fclose "FILE *stream"
+.Ft void
+.Fn fcloseall void
 .Sh DESCRIPTION
 The
 .Fn fclose
@@ -58,6 +61,12 @@ from its underlying file or set of functions.
 If the stream was being used for output, any buffered data is written
 first, using
 .Xr fflush 3 .
+.Pp
+The
+.Fn fcloseall
+function calls
+.Fn fclose
+on all open streams.
 .Sh RETURN VALUES
 Upon successful completion 0 is returned.
 Otherwise,
@@ -99,3 +108,8 @@ The
 function
 conforms to
 .St -isoC .
+.Pp
+The
+.Fn fcloseall
+function first appeared in
+.Fx 7.0 .

lib/libc/stdio/fcloseall.c

@@ -0,0 +1,39 @@
+/*-
+ * Copyright (C) 2006 Daniel M. Eischen.  All rights reserved.
+ * 
+ * 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 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 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdio.h>
+#include "local.h"
+
+__weak_reference(__fcloseall, fclose);
+
+void
+__fcloseall(void)
+{
+
+	(void)_fwalk(fclose);
+}

lib/libc/stdio/local.h

@@ -53,6 +53,7 @@ extern fpos_t	_sseek(FILE *, fpos_t, int);
 extern int	_ftello(FILE *, fpos_t *);
 extern int	_fseeko(FILE *, off_t, int, int);
 extern int	__fflush(FILE *fp);
+extern void	__fcloseall(void);
 extern wint_t	__fgetwc(FILE *);
 extern wint_t	__fputwc(wchar_t, FILE *);
 extern int	__sflush(FILE *);