Guess what? Trivial test for preadv.

2 files changed, 64 insertions, 0 deletions

diff --git a/regress/sys/kern/preadv/Makefile b/regress/sys/kern/preadv/Makefile
new file mode 100644
index 00000000000..ebfceff6ef8
--- /dev/null
+++ b/regress/sys/kern/preadv/Makefile
@@ -0,0 +1,5 @@
+#	$OpenBSD: Makefile,v 1.1 2002/02/08 20:04:03 art Exp $
+
+PROG=	preadv
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/kern/preadv/preadv.c b/regress/sys/kern/preadv/preadv.c
new file mode 100644
index 00000000000..0bfeb0c8121
--- /dev/null
+++ b/regress/sys/kern/preadv/preadv.c
@@ -0,0 +1,59 @@
+/*	$OpenBSD: preadv.c,v 1.1 2002/02/08 20:04:03 art Exp $	*/
+/*
+ *	Written by Artur Grabowski <art@openbsd.org> 2002 Public Domain.
+ */
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <err.h>
+#include <fcntl.h>
+
+int
+main()
+{	
+	char temp[] = "/tmp/dup2XXXXXXXXX";
+	const char magic[10] = "0123456789";
+	char c, c1, c2;
+	int fd;
+	struct iovec iv[2];
+
+	if ((fd = mkstemp(temp)) < 0)
+		err(1, "mkstemp");
+	remove(temp);
+
+	if (write(fd, magic, sizeof(magic)) != sizeof(magic))
+		err(1, "write");
+
+	if (lseek(fd, 0, SEEK_SET) != 0)
+		err(1, "lseek");
+
+	if (read(fd, &c, 1) != 1)
+		err(1, "read1");
+
+	if (c != magic[0])
+		errx(1, "read1 %c != %c", c, magic[0]);
+
+	iv[0].iov_base = &c1;
+	iv[0].iov_len = 1;
+	iv[1].iov_base = &c2;
+	iv[1].iov_len = 1;
+
+	if (preadv(fd, iv, 2, 7) != 2)
+		err(1, "pread");
+
+	if (c1 != magic[7])
+		errx(1, "pread %c != %c", c1, magic[7]);
+
+	if (c2 != magic[8])
+		errx(1, "pread %c != %c", c2, magic[7]);
+
+	if (read(fd, &c, 1) != 1)
+		err(1, "read2");
+
+	if (c != magic[1])
+		errx(1, "read2 %c != %c", c, magic[1]);
+
+	return 0;
+}