Simple dumb test for dup2.

2 files changed, 50 insertions, 0 deletions

diff --git a/regress/sys/kern/dup2/Makefile b/regress/sys/kern/dup2/Makefile
new file mode 100644
index 00000000000..2b965247bc8
--- /dev/null
+++ b/regress/sys/kern/dup2/Makefile
@@ -0,0 +1,11 @@
+#	$OpenBSD: Makefile,v 1.1 2001/10/08 22:40:50 art Exp $
+
+PROG=	dup2test
+NOMAN=	noman, no way, man
+
+install:
+
+regress:
+	./dup2test
+
+.include <bsd.prog.mk>
diff --git a/regress/sys/kern/dup2/dup2test.c b/regress/sys/kern/dup2/dup2test.c
new file mode 100644
index 00000000000..2b3a8a4ef0a
--- /dev/null
+++ b/regress/sys/kern/dup2/dup2test.c
@@ -0,0 +1,39 @@
+#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 + 1)) < 0)
+		err(1, "dup2");
+
+	/* Test 1: Do we get the right fd? */
+	if (fd2 != fd1 + 1)
+		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 didn't clear close-on-exec");
+
+	return 0;
+}