simple test for minherit.

2 files changed, 67 insertions, 0 deletions

diff --git a/regress/sys/kern/minherit/Makefile b/regress/sys/kern/minherit/Makefile
new file mode 100644
index 00000000000..e63cca1fbf7
--- /dev/null
+++ b/regress/sys/kern/minherit/Makefile
@@ -0,0 +1,4 @@
+#	$OpenBSD: Makefile,v 1.1 2002/01/31 15:53:12 art Exp $
+PROG=minherit
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/minherit/minherit.c b/regress/sys/kern/minherit/minherit.c
new file mode 100644
index 00000000000..2b5ed236db2
--- /dev/null
+++ b/regress/sys/kern/minherit/minherit.c
@@ -0,0 +1,63 @@
+/*	$OpenBSD: minherit.c,v 1.1 2002/01/31 15:53:12 art Exp $	*/
+/*
+ * Written by Artur Grabowski <art@openbsd.org> Public Domain.
+ */
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/mman.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <err.h>
+
+#define MAGIC "inherited"
+
+int
+main()
+{
+	void *map1, *map2;
+	int page_size;
+	int status;
+
+	page_size = getpagesize();
+
+	if ((map1 = mmap(NULL, page_size, PROT_READ|PROT_WRITE, MAP_ANON,
+	    -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	if ((map2 = mmap(NULL, page_size, PROT_READ|PROT_WRITE, MAP_ANON,
+	    -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	memset(map1, 0, sizeof(MAGIC));
+	memcpy(map2, MAGIC, sizeof(MAGIC));
+
+	if (minherit(map1, page_size, MAP_INHERIT_SHARE) != 0)
+		err(1, "minherit");
+
+	if (minherit(map2, page_size, MAP_INHERIT_NONE) != 0)
+		err(1, "minherit");
+
+	switch(fork()) {
+	case -1:
+		err(1, "fork");
+	case 0:
+		memcpy(map1, MAGIC, sizeof(MAGIC));
+		/* map2 is not mapped and should give us error on munmap */
+		if (munmap(map2, page_size) == 0)
+			_exit(1);
+		_exit(0);
+	}
+
+	if (wait(&status) < 0)
+		err(1, "wait");
+
+	if (!WIFEXITED(status))
+		err(1, "child error");
+
+	if (memcmp(map1, MAGIC, sizeof(MAGIC)) != 0)
+		return 1;
+
+	return WEXITSTATUS(status) != 0;
+}
\ No newline at end of file