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authorKonstantin Belousov <kib@FreeBSD.org>2021-01-10 19:22:49 +0000
committerKonstantin Belousov <kib@FreeBSD.org>2021-01-11 20:59:52 +0000
commit21f749da82e755aafab127618affeffb86cff9a5 (patch)
tree098b89a974c36f89652b952872c0977c31cbfd32 /lib/libc/sys/pdfork.c
parent4174e45fb4320dc27969c3fcbdd7d06e3b1150b8 (diff)
downloadsrc-21f749da82e755aafab127618affeffb86cff9a5.tar.gz
src-21f749da82e755aafab127618affeffb86cff9a5.zip
libthr: wrap pdfork(2), same as fork(2).
Without wrapping, rtld services and malloc(3) are not guaranteed to operate correctly in the forked child. Reviewed by: markj MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D28088
Diffstat (limited to 'lib/libc/sys/pdfork.c')
-rw-r--r--lib/libc/sys/pdfork.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/libc/sys/pdfork.c b/lib/libc/sys/pdfork.c
new file mode 100644
index 000000000000..003262d1237d
--- /dev/null
+++ b/lib/libc/sys/pdfork.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2021 The FreeBSD Foundation.
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Konstantin Belousov
+ * 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(s), this list of conditions and the following disclaimer as
+ * the first lines of this file unmodified other than the possible
+ * addition of one or more copyright notices.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice(s), 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 COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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 <sys/types.h>
+#include <unistd.h>
+#include "libc_private.h"
+
+#pragma weak pdfork
+pid_t
+pdfork(int *fdp, int flags)
+{
+ return (((pid_t (*)(int *, int))__libc_interposing[
+ INTERPOS_pdfork])(fdp, flags));
+}