Simple test for fcntl(F_DUPFD).

2 files changed, 44 insertions, 0 deletions

diff --git a/regress/sys/kern/fcntl_dup/Makefile b/regress/sys/kern/fcntl_dup/Makefile
new file mode 100644
index 00000000000..6038a7ee1b0
--- /dev/null
+++ b/regress/sys/kern/fcntl_dup/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/08 17:05:55 art Exp $
+
+PROG=	fcntl_dup
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/fcntl_dup/fcntl_dup.c b/regress/sys/kern/fcntl_dup/fcntl_dup.c
new file mode 100644
index 00000000000..ddad17ae908
--- /dev/null
+++ b/regress/sys/kern/fcntl_dup/fcntl_dup.c
@@ -0,0 +1,39 @@
+/*	$OpenBSD: fcntl_dup.c,v 1.1 2002/02/08 17:05:55 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 = fcntl(fd1, F_DUPFD)) < 0)
+		err(1, "fcntl(F_DUPFD)");
+
+	/* Test 2: Was close-on-exec cleared? */
+	if (fcntl(fd2, F_GETFD) != 0)
+		errx(1, "fcntl(F_DUPFD) didn't clear close-on-exec");
+
+	return 0;
+}