From b984825aa98dfbc10222d5d5f8a1f66c83672700 Mon Sep 17 00:00:00 2001
From: Artur Grabowski <art@cvs.openbsd.org>
Date: Fri, 8 Feb 2002 18:47:47 +0000
Subject: Test an obscure case of dup2 behavior.

---
 regress/sys/kern/dup2_self/Makefile    |  5 ++++
 regress/sys/kern/dup2_self/dup2_self.c | 43 ++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 regress/sys/kern/dup2_self/Makefile
 create mode 100644 regress/sys/kern/dup2_self/dup2_self.c

(limited to 'regress/sys')

diff --git a/regress/sys/kern/dup2_self/Makefile b/regress/sys/kern/dup2_self/Makefile
new file mode 100644
index 00000000000..938a41a6f93
--- /dev/null
+++ b/regress/sys/kern/dup2_self/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/08 18:47:46 art Exp $
+
+PROG=	dup2_self
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/dup2_self/dup2_self.c b/regress/sys/kern/dup2_self/dup2_self.c
new file mode 100644
index 00000000000..3b0a3936ae7
--- /dev/null
+++ b/regress/sys/kern/dup2_self/dup2_self.c
@@ -0,0 +1,43 @@
+/*	$OpenBSD: dup2_self.c,v 1.1 2002/02/08 18:47:46 art Exp $	*/
+/*
+ *	Written by Artur Grabowski <art@openbsd.org> 2002 Public Domain.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <fcntl.h>
+
+int
+main()
+{
+	int orgfd, fd1, fd2;
+	char temp[] = "/tmp/dup2XXXXXXXXX";
+
+	if ((orgfd = mkstemp(temp)) < 0)
+		err(1, "mkstemp");
+	remove(temp);
+
+	if (ftruncate(orgfd, 1024) != 0)
+		err(1, "ftruncate");
+
+	if ((fd1 = dup(orgfd)) < 0)
+		err(1, "dup");
+
+	/* Set close-on-exec */
+	if (fcntl(fd1, F_SETFD, 1) != 0)
+		err(1, "fcntl(F_SETFD)");
+
+	if ((fd2 = dup2(fd1, fd1)) < 0)
+		err(1, "dup2");
+
+	/* Test 1: Do we get the right fd? */
+	if (fd2 != fd1)
+		errx(1, "dup2 didn't give us the right fd");
+
+	/* Test 2: Was close-on-exec cleared? */
+	if (fcntl(fd2, F_GETFD) == 0)
+		errx(1, "dup2 cleared close-on-exec");
+
+	return 0;
+}
-- 
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